OPA2134 TI Datasheet

14
FEATURES SUPERIOR SOUND QUALITY ULTRA LOW DISTORTION: 0.00008% LOW NOISE: 8nV/Hz TRUE FET-INPUT: I B = 5pA HIGH SPEED: SLEW RATE: 20V/μs BANDWIDTH: 8MHz HIGH OPEN-LOOP GAIN: 120dB (600) WIDE SUPPLY RANGE: ±2.5V to ±18V SINGLE, DUAL, AND QUAD VERSIONS High Performance AUDIO OPERATIONAL AMPLIFIERS TM DESCRIPTION The OPA134 series are ultra-low distortion, low noise operational amplifiers fully specified for audio appli- cations. A true FET input stage was incorporated to provide superior sound quality and speed for excep- tional audio performance. This in combination with high output drive capability and excellent dc perfor- mance allows use in a wide variety of demanding applications. In addition, the OPA134’s wide output swing, to within 1V of the rails, allows increased headroom making it ideal for use in any audio circuit. OPA134 op amps are easy to use and free from phase inversion and overload problems often found in com- mon FET-input op amps. They can be operated from ±2.5V to ±18V power supplies. Input cascode cir- cuitry provides excellent common-mode rejection and maintains low input bias current over its wide input voltage range, minimizing distortion. OPA134 series op amps are unity-gain stable and provide excellent dynamic behavior over a wide range of load condi- tions, including high load capacitance. The dual and quad versions feature completely independent cir- cuitry for lowest crosstalk and freedom from interac- tion, even when overdriven or overloaded. Single and dual versions are available in 8-pin DIP and SO-8 surface-mount packages in standard con- figurations. The quad is available in 14-pin DIP and SO-14 surface mount packages. All are specified for –40°C to +85°C operation. A SPICE macromodel is available for design analysis. APPLICATIONS PROFESSIONAL AUDIO AND MUSIC LINE DRIVERS LINE RECEIVERS MULTIMEDIA AUDIO ACTIVE FILTERS PREAMPLIFIERS INTEGRATORS CROSSOVER NETWORKS © 1996 Burr-Brown Corporation PDS-1339C Printed in U.S.A. December, 1997 International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111 Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132 1 2 3 4 8 7 6 5 V+ Out B –In B +In B Out A –In A +In A V– OPA2134 8-Pin DIP, SO-8 A B 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Out D –In D +In D V– +In C –In C Out C Out A –In A +In A V+ +In B –In B Out B OPA4134 14-Pin DIP SO-14 A D B C 1 2 3 4 8 7 6 5 Offset Trim V+ Output NC Offset Trim –In +In V– OPA134 8-Pin DIP, SO-8 ® OPA134 OPA2134 OPA4134 OPA134 OPA2134 OPA4134 OPA4134 OPA134 OPA2134 SBOS058

Transcript of OPA2134 TI Datasheet

Page 1: OPA2134 TI Datasheet

FEATURES SUPERIOR SOUND QUALITY

ULTRA LOW DISTORTION: 0.00008%

LOW NOISE: 8nV/ √Hz

TRUE FET-INPUT: IB = 5pA

HIGH SPEED:

SLEW RATE: 20V/ µs

BANDWIDTH: 8MHz

HIGH OPEN-LOOP GAIN: 120dB (600 Ω)

WIDE SUPPLY RANGE: ±2.5V to ±18V

SINGLE, DUAL, AND QUAD VERSIONS

High PerformanceAUDIO OPERATIONAL AMPLIFIERS

TM

DESCRIPTIONThe OPA134 series are ultra-low distortion, low noiseoperational amplifiers fully specified for audio appli-cations. A true FET input stage was incorporated toprovide superior sound quality and speed for excep-tional audio performance. This in combination withhigh output drive capability and excellent dc perfor-mance allows use in a wide variety of demandingapplications. In addition, the OPA134’s wide outputswing, to within 1V of the rails, allows increasedheadroom making it ideal for use in any audio circuit.OPA134 op amps are easy to use and free from phaseinversion and overload problems often found in com-mon FET-input op amps. They can be operated from±2.5V to ±18V power supplies. Input cascode cir-cuitry provides excellent common-mode rejection andmaintains low input bias current over its wide inputvoltage range, minimizing distortion. OPA134 seriesop amps are unity-gain stable and provide excellentdynamic behavior over a wide range of load condi-tions, including high load capacitance. The dual andquad versions feature completely independent cir-cuitry for lowest crosstalk and freedom from interac-tion, even when overdriven or overloaded.

Single and dual versions are available in 8-pin DIPand SO-8 surface-mount packages in standard con-figurations. The quad is available in 14-pin DIP andSO-14 surface mount packages. All are specified for–40°C to +85°C operation. A SPICE macromodel isavailable for design analysis.

APPLICATIONS PROFESSIONAL AUDIO AND MUSIC

LINE DRIVERS

LINE RECEIVERS

MULTIMEDIA AUDIO

ACTIVE FILTERS

PREAMPLIFIERS

INTEGRATORS

CROSSOVER NETWORKS

© 1996 Burr-Brown Corporation PDS-1339C Printed in U.S.A. December, 1997

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

1

2

3

4

8

7

6

5

V+

Out B

–In B

+In B

Out A

–In A

+In A

V–

OPA2134

8-Pin DIP, SO-8

A

B

1

2

3

4

5

6

7

14

13

12

11

10

9

8

Out D

–In D

+In D

V–

+In C

–In C

Out C

Out A

–In A

+In A

V+

+In B

–In B

Out B

OPA4134

14-Pin DIP SO-14

A D

B C

1

2

3

4

8

7

6

5

Offset Trim

V+

Output

NC

Offset Trim

–In

+In

V–

OPA134

8-Pin DIP, SO-8

® OPA134OPA2134OPA4134

OPA134 OPA2134OPA4134

OPA4134

OPA134 OPA2134

SBOS058

Page 2: OPA2134 TI Datasheet

2

®

OPA134/2134/4134

SPECIFICATIONSAt TA = +25°C, VS = ±15V, unless otherwise noted.

OPA134PA, UAOPA2134PA, UAOPA4134PA, UA

PARAMETER CONDITION MIN TYP MAX UNITS

AUDIO PERFORMANCETotal Harmonic Distortion + Noise G = 1, f = 1kHz, VO = 3Vrms

RL = 2kΩ 0.00008 %RL = 600Ω 0.00015 %

Intermodulation Distortion G = 1, f = 1kHz, VO = 1Vp-p –98 dBHeadroom(1) THD < 0.01%, RL = 2kΩ, VS = ±18V 23.6 dBu

FREQUENCY RESPONSEGain-Bandwidth Product 8 MHzSlew Rate(2) ±15 ±20 V/µsFull Power Bandwidth 1.3 MHzSettling Time 0.1% G = 1, 10V Step, CL = 100pF 0.7 µs

0.01% G = 1, 10V Step, CL = 100pF 1 µsOverload Recovery Time (VIN) • (Gain) = VS 0.5 µs

NOISEInput Voltage Noise

Noise Voltage, f = 20Hz to 20kHz 1.2 µVrmsNoise Density, f = 1kHz 8 nV/√Hz

Current Noise Density, f = 1kHz 3 fA/√Hz

OFFSET VOLTAGEInput Offset Voltage ±0.5 ±2 mV

TA = –40°C to +85°C ±1 ±3(3) mVvs Temperature TA = –40°C to +85°C ±2 µV/°Cvs Power Supply (PSRR) VS = ±2.5V to ±18V 90 106 dB

Channel Separation (Dual, Quad) dc, RL = 2kΩ 135 dBf = 20kHz, RL = 2kΩ 130 dB

INPUT BIAS CURRENTInput Bias Current(4) VCM =0V +5 ±100 pA

vs Temperature(3) See Typical Curve ±5 nAInput Offset Current(4) VCM =0V ±2 ±50 pA

INPUT VOLTAGE RANGECommon-Mode Voltage Range (V–)+2.5 ±13 (V+)–2.5 VCommon-Mode Rejection VCM = –12.5V to +12.5V 86 100 dB

TA = –40°C to +85°C 90 dB

INPUT IMPEDANCEDifferential 1013 || 2 Ω || pFCommon-Mode VCM = –12.5V to +12.5V 1013 || 5 Ω || pF

OPEN-LOOP GAINOpen-Loop Voltage Gain RL = 10kΩ, VO = –14.5V to +13.8V 104 120 dB

RL = 2kΩ, VO = –13.8V to +13.5V 104 120 dBRL = 600Ω, VO = –12.8V to +12.5V 104 120 dB

OUTPUTVoltage Output RL = 10kΩ (V–)+0.5 (V+)–1.2 V

RL = 2kΩ (V–)+1.2 (V+)–1.5 VRL = 600Ω (V–)+2.2 (V+)–2.5 V

Output Current ±35 mAOutput Impedance, Closed-Loop(5) f = 10kHz 0.01 Ω

Open-Loop f = 10kHz 10 ΩShort-Circuit Current ±40 mACapacitive Load Drive (Stable Operation) See Typical Curve

POWER SUPPLYSpecified Operating Voltage ±15 VOperating Voltage Range ±2.5 ±18 VQuiescent Current (per amplifier) IO = 0 4 5 mA

TEMPERATURE RANGESpecified Range –40 +85 °COperating Range –55 +125 °CStorage –55 +125 °CThermal Resistance, θJA

8-Pin DIP 100 °C/WSO-8 Surface-Mount 150 °C/W14-Pin DIP 80 °C/WSO-14 Surface-Mount 110 °C/W

NOTES: (1) dBu = 20*log (Vrms/0.7746) where Vrms is the maximum output voltage for which THD+Noise is less than 0.01%. See THD+Noise text. (2) Guaranteedby design. (3) Guaranteed by wafer-level test to 95% confidence level. (4) High-speed test at TJ = 25°C. (5) See “Closed-Loop Output Impedance vs Frequency”typical curve.

Page 3: OPA2134 TI Datasheet

3 OPA134/2134/4134®

PACKAGEDRAWING TEMPERATURE

PRODUCT PACKAGE NUMBER (1) RANGE

SingleOPA134PA 8-Pin Plastic DIP 006 –40°C to +85°COPA134UA SO-8 Surface-Mount 182 –40°C to +85°C

DualOPA2134PA 8-Pin Plastic DIP 006 –40°C to +85°COPA2134UA SO-8 Surface-Mount 182 –40°C to +85°C

QuadOPA4134PA 14-Pin Plastic DIP 010 –40°C to +85°COPA4134UA SO-14 Surface-Mount 235 –40°C to +85°C

NOTE: (1) For detailed drawing and dimension table, please see end of datasheet, or Appendix C of Burr-Brown IC Data Book.

ELECTROSTATICDISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brownrecommends that all integrated circuits be handled withappropriate precautions. Failure to observe proper handlingand installation procedures can cause damage.

ESD damage can range from subtle performance degrada-tion to complete device failure. Precision integrated circuitsmay be more susceptible to damage because very smallparametric changes could cause the device not to meet itspublished specifications.

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage, V+ to V– .................................................................... 36VInput Voltage .................................................... (V–) –0.7V to (V+) +0.7VOutput Short-Circuit(2) .............................................................. ContinuousOperating Temperature ................................................. –40°C to +125°CStorage Temperature ..................................................... –55°C to +125°CJunction Temperature ...................................................................... 150°CLead Temperature (soldering, 10s) ................................................. 300°C

NOTES: (1) Stresses above these ratings may cause permanent damage.(2) Short-circuit to ground, one amplifier per package.

TYPICAL PERFORMANCE CURVESAt TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted.

TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY

Frequency (Hz)

TH

D+

Noi

se (

%)

0.1

0.01

0.001

0.0001

0.00001

10 100 1k 10k 100k

2kΩ 600Ω

RL

VO = 3VrmsG = +1

G = +10

SMPTE INTERMODULATION DISTORTION vs OUTPUT AMPLITUDE

Output Amplitude (Vpp)

IMD

(%

)

1

0.1

0.010

0.001

0.0005

5

30m 0.1 1 10 30

G = +1 f = 1kHz RL = 2kΩ

Baseline

OP176OPA134

OPA134

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumesno responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to changewithout notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrantany BURR-BROWN product for use in life support devices and/or systems.

PACKAGE/ORDERING INFORMATION

Page 4: OPA2134 TI Datasheet

4

®

OPA134/2134/4134

HEADROOM – TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT AMPLITUDE

Output Amplitude (Vrms)

TH

D+

Noi

se (

%)

1

0.1

0.010

0.001

0.00050.1 1 10 20

VS = ±18V RL = 2kΩ f = 1kHz

THD < 0.01% OPA134 – 11.7Vrms OP176 – 11.1Vrms

Baseline

OP176OPA134

OPA134

TYPICAL PERFORMANCE CURVES (CONT)At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted.

TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY

Frequency (Hz)

TH

D+

Noi

se (

%)

0.01

0.001

0.0001

0.0000120 100 1k 10k 20k

VO = 10Vrms RL = 2kΩ

VS = ±16

VS = ±17 VS = ±18

HARMONIC DISTORTION + NOISE vs FREQUENCY

Frequency (Hz)

Am

plitu

de (%

of F

unda

men

tals

)

0.01

0.001

0.0001

0.00001

0.00000120 100 1k 10k 20k

2nd Harmonic 3rd Harmonic

VO = 1Vrms

R L = 600Ω

R L = 2kΩ

VOLTAGE NOISE vs SOURCE RESISTANCE

Source Resistance (Ω)

Vol

tage

Noi

se (

nV/√

Hz)

1k

100

10

1

0.110 100 1k 10k 100k 1M 10M

OP176+ Resistor

OPA134+ Resistor

Resistor Noise Only Vn (total) = √(inRS)2 + en

2 + 4kTRS

INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY

1

1k

100

10

Vol

tage

Noi

se (

nV/√

Hz)

Frequency (Hz)

10 100 1k 10k 100k 1M

1

Cur

rent

Noi

se (

fA/√

Hz)

Voltage Noise

Current Noise

INPUT-REFERRED NOISE VOLTAGE vs NOISE BANDWIDTH

Noise Bandwidth (Hz)

Noi

se V

olta

ge (

µV)

100

10

1

0.11 10 100 1k 10k 100k

RS = 20Ω

Peak-to-Peak

RMS

Page 5: OPA2134 TI Datasheet

5 OPA134/2134/4134®

TYPICAL PERFORMANCE CURVES (CONT)At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted.

OPEN-LOOP GAIN/PHASE vs FREQUENCY

0.1 1 10 100 1k 10k 100k 1M 10M

160

140

120

100

80

60

40

20

0

–20

0

–45

–90

–135

–180

Vol

tage

Gai

n (d

B)

Pha

se S

hift

(°)

Frequency (Hz)

φ

G

CLOSED-LOOP GAIN vs FREQUENCY

Frequency (Hz)

Clo

sed-

Loop

Gai

n (d

B)

50

40

30

20

10

0

–10

–201k 10k 100k 1M 10M

G = +10

G = +100

G = +1

POWER SUPPLY AND COMMON-MODE REJECTION vs FREQUENCY

Frequency (Hz)

PS

R, C

MR

(dB

)

120

100

80

60

40

20

010 100 1k 10k 100k 1M

CMR

–PSR

+PSR

MAXIMUM OUTPUT VOLTAGE vs FREQUENCY

Frequency (Hz)

10k 100k 1M 10M

30

20

10

0

Out

put V

olta

ge (

Vp-

p)

VS = ±15V

VS = ±2.5V

VS = ±5V

Maximum output voltage without slew-rate induced distortion

CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY

Frequency (Hz)

Clo

sed-

Loop

Out

put I

mpe

danc

e (Ω

)

10

1

0.1

0.01

0.001

0.0001

10 100 1k 10k 100k

G = +1

G = +2

G = +10

G = +100

Note: Open-Loop Output Impedance at f = 10kHz is 10Ω

CHANNEL SEPARATION vs FREQUENCY

Frequency (Hz)

Cha

nnel

Sep

arat

ion

(dB

)160

140

120

100

80

100 1k 10k 100k

Dual and quad devices. G = 1, all channels. Quad measured channel A to D or B to C—other combinations yield improved rejection.

RL = ∞

RL = 2kΩ

Page 6: OPA2134 TI Datasheet

6

®

OPA134/2134/4134

FPO

TYPICAL PERFORMANCE CURVES (CONT)At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted.

INPUT BIAS CURRENT vs TEMPERATURE

Ambient Temperature (°C)

Inpu

t Bia

s C

urre

nt (

pA)

100k

10k

1k

100

10

1

0.1–75 –50 –25 0 25 50 75 100 125

Dual

Single

High Speed Test Warmed Up

INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE

Common-Mode Voltage (V)

Inpu

t Bia

s C

urre

nt (

pA)

10

9

8

7

6

5

4

3

2

1

0

–15 –10 –5 0 5 10 15

High Speed Test

OPEN-LOOP GAIN vs TEMPERATURE150

140

130

120

110

100

Ope

n-Lo

op G

ain

(dB

)

Temperature (°C)

–75 –50 –25 0 25 50 75 100 125

RL = 600Ω

RL = 2kΩ

RL = 10kΩ

CMR, PSR vs TEMPERATURE

Ambient Temperature (°C)

CM

R, P

SR

(dB

)

120

110

100

90

–75 –50 –25 0 25 50 75 100 125

PSR

CMR

QUIESCENT CURRENT AND SHORT-CIRCUIT CURRENT vs TEMPERATURE

Ambient Temperature (°C)

Qui

esce

nt C

urre

nt P

er A

mp

(mA

)

4.3

4.2

4.1

4.0

3.9

3.8

60

50

40

30

20

10

Sho

rt-C

ircui

t Cur

rent

(mA

)

–75 –50 –25 0 25 50 75 100 125

±ISC

±IQ

OUTPUT VOLTAGE SWING vs OUTPUT CURRENT15

14

13

12

11

10

–10

–11

–12

–13

–14

–15

0 10 20 30 40 50 60

Output Current (mA)

Out

put V

olta

ge S

win

g (V

) –55°C

–55°C

25°C25°C

85°C

85°C

125°C

125°C

25°C

VIN = –15V

VIN = 15V

Page 7: OPA2134 TI Datasheet

7 OPA134/2134/4134®

TYPICAL PERFORMANCE CURVES (CONT)At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted.

SMALL-SIGNAL STEP RESPONSE G =1, CL = 100pF

200ns/div

50m

V/d

iv

LARGE-SIGNAL STEP RESPONSE G = 1, CL = 100pF

5V/d

iv

1µs/div

SETTLING TIME vs CLOSED-LOOP GAIN

Closed-Loop Gain (V/V)

Set

tling

Tim

e (µ

s)

100

10

1

0.1±1 ±10 ±100 ±1000

0.01%

0.1%

SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE

60

50

40

30

20

10

0100pF 1nF 10nF

Load Capacitance

Ove

rsho

ot (

%)

G = +1

G = ±10

G = –1

OFFSET VOLTAGE PRODUCTION DISTRIBUTION

Per

cent

of A

mpl

ifier

s (%

)

Offset Voltage (V)

–200

0–1

800

–160

0–1

400

–120

0–1

000

–800

–600

–400

–200 0

200

400

600

800

1000

1200

1400

1600

1800

2000

18

16

14

12

10

8

6

4

2

0

Typical production distribution of packaged units.

OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION

Per

cent

of A

mpl

ifier

s (%

)

Offset Voltage Drift (µV/°C)

0.5

1.5

2.5

3.5

4.5

5.5

6.5

7.5

8.5

9.5

10.5

11.5

12.5

12

10

8

6

4

2

0

Typical production distribution of packaged units.

Page 8: OPA2134 TI Datasheet

8

®

OPA134/2134/4134

APPLICATIONS INFORMATIONOPA134 series op amps are unity-gain stable and suitablefor a wide range of audio and general-purpose applications.All circuitry is completely independent in the dual version,assuring normal behavior when one amplifier in a packageis overdriven or short-circuited. Power supply pins shouldbe bypassed with 10nF ceramic capacitors or larger tominimize power supply noise.

OPERATING VOLTAGE

OPA134 series op amps operate with power supplies from±2.5V to ±18V with excellent performance. Althoughspecifications are production tested with ±15V supplies,most behavior remains unchanged throughout the fulloperating voltage range. Parameters which vary signifi-cantly with operating voltage are shown in the typicalperformance curves.

OFFSET VOLTAGE TRIM

Offset voltage of OPA134 series amplifiers is laser trimmedand usually requires no user adjustment. The OPA134(single op amp version) provides offset trim connectionson pins 1 and 8, identical to 5534 amplifiers. Offsetvoltage can be adjusted by connecting a potentiometer asshown in Figure 1. This adjustment should be used only tonull the offset of the op amp, not to adjust system offset oroffset produced by the signal source. Nulling offset couldchange the offset voltage drift behavior of the op amp.While it is not possible to predict the exact change in drift,the effect is usually small.

TOTAL HARMONIC DISTORTION

OPA134 series op amps have excellent distortion character-istics. THD+Noise is below 0.0004% throughout the audiofrequency range, 20Hz to 20kHz, with a 2kΩ load. Inaddition, distortion remains relatively flat through itswide output voltage swing range, providing increased head-room compared to other audio amplifiers, including theOP176/275.

FIGURE 1. OPA134 Offset Voltage Trim Circuit.

V+

V–

100kΩ

OPA134 single op amp only. Use offset adjust pins only to null

offset voltage of op amp—see text.

Trim Range: ±4mV typ

OPA134 6

7

8

4

3

2 1

10nF

10nF

In many ways headroom is a subjective measurement. It canbe thought of as the maximum output amplitude allowedwhile still maintaining a very low level of distortion. In anattempt to quantify headroom, we have defined “very lowdistortion” as 0.01%. Headroom is expressed as a ratiowhich compares the maximum allowable output voltagelevel to a standard output level (1mW into 600Ω, or0.7746Vrms). Therefore, OPA134 series op amps, whichhave a maximum allowable output voltage level of 11.7Vrms(THD+Noise < 0.01%), have a headroom specification of23.6dBu. See the typical curve “Headroom - Total HarmonicDistortion + Noise vs Output Amplitude.”

DISTORTION MEASUREMENTS

The distortion produced by OPA134 series op amps is belowthe measurement limit of all known commercially availableequipment. However, a special test circuit can be used toextend the measurement capabilities.

Op amp distortion can be considered an internal error sourcewhich can be referred to the input. Figure 2 shows acircuit which causes the op amp distortion to be 101 timesgreater than normally produced by the op amp. The additionof R3 to the otherwise standard non-inverting amplifier

FIGURE 2. Distortion Test Circuit.

R2

OPA134

R1

Signal Gain = 1+

Distortion Gain = 1+

R3 VO = 3Vrms

Generator Output

Analyzer Input

Audio Precision System One Analyzer(1)

RL 1kΩ

IBM PC or

Compatible

SIG. GAIN

DIST. GAIN R1 R2 R3

100Ω

10Ω

1kΩ

1kΩ

1kΩ

10Ω

11Ω

1

11

101

101

101

101

NOTE: (1) Measurement BW = 80kHz

R2

R1

R2

R1 II R3

Page 9: OPA2134 TI Datasheet

9 OPA134/2134/4134®

VOUT

VIN

R1

If RS > 2kΩ or R1 II R2 > 2kΩ RS = R1 II R2

R2

OPA134

configuration alters the feedback factor or noise gain of thecircuit. The closed-loop gain is unchanged, but the feedbackavailable for error correction is reduced by a factor of 101,thus extending the resolution by 101. Note that the inputsignal and load applied to the op amp are the same as withconventional feedback without R3. The value of R3 shouldbe kept small to minimize its effect on the distortion mea-surements.

Validity of this technique can be verified by duplicatingmeasurements at high gain and/or high frequency where thedistortion is within the measurement capability of the testequipment. Measurements for this data sheet were madewith an Audio Precision distortion/noise analyzer whichgreatly simplifies such repetitive measurements. The mea-surement technique can, however, be performed with manualdistortion measurement instruments.

SOURCE IMPEDANCE AND DISTORTION

For lowest distortion with a source or feedback networkwhich has an impedance greater than 2kΩ, the impedanceseen by the positive and negative inputs in noninvertingapplications should be matched. The p-channel JFETs in theFET input stage exhibit a varying input capacitance withapplied common-mode input voltage. In inverting configu-rations the input does not vary with input voltage since theinverting input is held at virtual ground. However, innoninverting applications the inputs do vary, and the gate-to-source voltage is not constant. The effect is increaseddistortion due to the varying capacitance for unmatchedsource impedances greater than 2kΩ.

To maintain low distortion, match unbalanced source im-pedance with appropriate values in the feedback network asshown in Figure 3. Of course, the unbalanced impedancemay be from gain-setting resistors in the feedback path. Ifthe parallel combination of R1 and R2 is greater than 2kΩ, amatching impedance on the noninverting input should beused. As always, resistor values should be minimized toreduce the effects of thermal noise.

FIGURE 3. Impedance Matching for Maintaining LowDistortion in Non-Inverting Circuits.

NOISE PERFORMANCE

Circuit noise is determined by the thermal noise of externalresistors and op amp noise. Op amp noise is described bytwo parameters—noise voltage and noise current. The totalnoise is quantified by the equation:

With low source impedance, the current noise term isinsignificant and voltage noise dominates the noise perfor-mance. At high source impedance, the current noise termbecomes the dominant contributor.

Low noise bipolar op amps such as the OPA27 and OPA37provide very low voltage noise at the expense of a highercurrent noise. However, OPA134 series op amps are uniquein providing very low voltage noise and very low currentnoise. This provides optimum noise performance over awide range of sources, including reactive source imped-ances, refer to the typical curve, “Voltage Noise vs SourceResistance.” Above 2kΩ source resistance, the op ampcontributes little additional noise—the voltage and currentterms in the total noise equation become insignificant andthe source resistance term dominates. Below 2kΩ, op ampvoltage noise dominates over the resistor noise, but com-pares favorably with other audio op amps such as OP176.

PHASE REVERSAL PROTECTION

OPA134 series op amps are free from output phase-reversalproblems. Many audio op amps, such as OP176, exhibitphase-reversal of the output when the input common-modevoltage range is exceeded. This can occur in voltage-fol-lower circuits, causing serious problems in control loopapplications. OPA134 series op amps are free from thisundesirable behavior even with inputs of 10V beyond theinput common-mode range.

POWER DISSIPATION

OPA134 series op amps are capable of driving 600Ω loadswith power supply voltage up to ±18V. Internal powerdissipation is increased when operating at high supplyvoltages. Copper leadframe construction used in OPA134series op amps improves heat dissipation compared to con-ventional materials. Circuit board layout can also helpminimize junction temperature rise. Wide copper traces helpdissipate the heat by acting as an additional heat sink.Temperature rise can be further minimized by soldering thedevices to the circuit board rather than using a socket.

OUTPUT CURRENT LIMIT

Output current is limited by internal circuitry to approxi-mately ±40mA at 25°C. The limit current decreases withincreasing temperature as shown in the typical performancecurve “Short-Circuit Current vs Temperature.”

V total i R e kTRn n S n s( ) ( )= + +2 2 4

Page 10: OPA2134 TI Datasheet

PACKAGE OPTION ADDENDUM

www.ti.com 28-Mar-2012

Addendum-Page 1

PACKAGING INFORMATION

Orderable Device Status (1) Package Type PackageDrawing

Pins Package Qty Eco Plan (2) Lead/Ball Finish

MSL Peak Temp (3) Samples

(Requires Login)

OPA134PA ACTIVE PDIP P 8 50 Green (RoHS& no Sb/Br)

CU NIPDAU N / A for Pkg Type

OPA134PA3 OBSOLETE PDIP P 8 TBD Call TI Call TI

OPA134PAG4 ACTIVE PDIP P 8 50 Green (RoHS& no Sb/Br)

CU NIPDAU N / A for Pkg Type

OPA134UA ACTIVE SOIC D 8 75 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA134UA/2K5 ACTIVE SOIC D 8 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA134UA/2K5E4 ACTIVE SOIC D 8 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA134UA3 OBSOLETE PDIP P 8 TBD Call TI Call TI

OPA134UAE4 ACTIVE SOIC D 8 75 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA134UAG4 ACTIVE SOIC D 8 75 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA2134PA ACTIVE PDIP P 8 50 Green (RoHS& no Sb/Br)

CU NIPDAU N / A for Pkg Type

OPA2134PAG4 ACTIVE PDIP P 8 50 Green (RoHS& no Sb/Br)

CU NIPDAU N / A for Pkg Type

OPA2134UA ACTIVE SOIC D 8 75 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA2134UA/2K5 ACTIVE SOIC D 8 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA2134UA/2K5E4 ACTIVE SOIC D 8 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA2134UAE4 ACTIVE SOIC D 8 75 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA2134UAG4 ACTIVE SOIC D 8 75 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA4134PA OBSOLETE PDIP N 14 TBD Call TI Call TI

OPA4134UA ACTIVE SOIC D 14 50 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

Page 11: OPA2134 TI Datasheet

PACKAGE OPTION ADDENDUM

www.ti.com 28-Mar-2012

Addendum-Page 2

Orderable Device Status (1) Package Type PackageDrawing

Pins Package Qty Eco Plan (2) Lead/Ball Finish

MSL Peak Temp (3) Samples

(Requires Login)

OPA4134UA/2K5 ACTIVE SOIC D 14 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA4134UA/2K5E4 ACTIVE SOIC D 14 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

OPA4134UAE4 ACTIVE SOIC D 14 50 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

SN412008DRE4 ACTIVE SOIC D 8 2500 Green (RoHS& no Sb/Br)

CU NIPDAU Level-3-260C-168 HR

(1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.

(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availabilityinformation and additional product content details.TBD: The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement thatlead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used betweenthe die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weightin homogeneous material)

(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on informationprovided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken andcontinues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Page 12: OPA2134 TI Datasheet

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device PackageType

PackageDrawing

Pins SPQ ReelDiameter

(mm)

ReelWidth

W1 (mm)

A0(mm)

B0(mm)

K0(mm)

P1(mm)

W(mm)

Pin1Quadrant

OPA134UA/2K5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1

OPA2134UA/2K5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1

OPA4134UA/2K5 SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1

PACKAGE MATERIALS INFORMATION

www.ti.com 11-Aug-2009

Pack Materials-Page 1

Page 13: OPA2134 TI Datasheet

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

OPA134UA/2K5 SOIC D 8 2500 346.0 346.0 29.0

OPA2134UA/2K5 SOIC D 8 2500 346.0 346.0 29.0

OPA4134UA/2K5 SOIC D 14 2500 346.0 346.0 33.0

PACKAGE MATERIALS INFORMATION

www.ti.com 11-Aug-2009

Pack Materials-Page 2

Page 14: OPA2134 TI Datasheet

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