Precision Operational Amplifier: Precision AmplifiersThe NJM2729 is a high performance oper ational...

NJM2729

- 1 -E1

Precision Operational Amplifier FEATURES PACKAGE OUTLINE Precision VIO=60µV max.

VIO=100µV max. (Ta=-40ºC to +85ºC) Low Offset Drift ΔVIO/ΔT=0.9µV/ºC max. (Ta=-40 to +85ºC) Specified for ±15V and ±5V operation CMR 130dB min. Low Noise VNI=80nVrms typ. at f=1 to 100Hz en=8nV/√Hz typ. at f=100Hz Open Loop Gain Av=130dB min. Guaranteed Temperature Ta=-40ºC to +85ºC Unity Gain Stable Operating Voltage Vopr=±3V to ±18V Unity Gain Frequency fT=1.1MHz typ. Supply Current Icc=2mA max. Package SOP8 JEDEC 150mil

GENERAL DESCRIPTION

The NJM2729 is a high performance operational amplifier features very low offset voltage and drift. Features are low offset voltage and drift, hi common mode rejection, low noise and open loop gain. DC

characteristics are 100% tested and specified from −40 to 85ºC. The NJM2729 is suitable for high gain circuit amplified small signal and sets required stable behavior over

a wide temperature range. APPRICATION Thermocouple sensor Bridge Amplifier Current Sensor Instrumentation Amplifier Reference Voltage Circuit PIN CONFIGURATION PACKAGE DESCRIPTION

NJM2729E ( SOP8 )

8

7

6

5

1

2

3

4

BALANCE

V−

−INPUT

+INPUT

NC

BALANCE

V+

OUTPUT

(Top View)

5.0±0.3

1.27

3.9±

0.2

6.0±

0.4

8 5

1 4

0.74MAX

SOP8 MEET JEDEC MS-012-AA

NJM2729

- 2 - E1

ABSOLUTE MAXIMUM RATING (Ta=25ºC Unless Otherwise Specified) PARAMETER SYMBOL RATING UNIT

Supply Voltage V+/V- ±20 V

Common Mode Input Voltage (Note1) VICM ±20 V

Differential Input Voltage VID ±30 V

Power Dissipation (Note 2) PD 640 mW

Operating Temperature Topr -40 to +85 ºC

Storage Temperature Tstg -50 to +125 ºC (Note1) For supply voltage less than ±20V, the maximum input voltage is equal to the supply voltage. (Note2) Mounted on the EIA/JEDEC standard board (76.2×114.3×1.6mm, two layer, FR-4). RECOMMENDED OPERATING VOLTAGE

PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT

Supply Voltage V+/V- ±3 - ±18 V

ELECTRONIC CHARACTERISTICS (V+/V-=±15V Ta=+25ºC, VICM=0V unless otherwise specified) DC CHARACTERISTICS


Input Characteristics Input Offset Voltage VIO1 - 20 60 µV VIO2 Ta=-40 to +85ºC - 20 100 µV Input Offset Voltage Drift ΔVio/T Ta=-40→+25ºC / Ta=+25ºC→+85ºC - 0.3 0.9 µV/ºC Common Mode Input Voltage Range VICM1 ±13 ±14 - V VICM2 Ta=-40 to +85ºC ±13 ±13.5 - V Common Mode Rejection Ratio CMR1 VCM=0V→-13V / VCM=0V→+13V 130 140 - dB

CMR2 Ta=-40 to +85ºC,

VCM=0V→-13V / VCM=0V→+13V 120 140 - dB Supply Voltage Rejection Ratio SVR1 V+/V-=±3V to ±18V 115 125 - dB SVR2 Ta=-40 to +85ºC,V+/V-=±3V to ±18V 110 120 - dB Input Bias Current IB1 -0.2 1.2 2.8 nA IB2 Ta=-40 to +85ºC -1.5 1.7 6 nA Input Bias Current Drift ΔIB/T Ta=-40→+85ºC - 8 60 pA/ºC Input Offset Current IIO1 - 0.3 2.8 nA IIO2 Ta=-40 to +85ºC - 0.3 4.5 nA Input Offset Current Drift ΔIIO/T Ta=-40→+85ºC - 1.5 72 pA/ºC Differential Input Impedance RID Theoretical value by design. - 90 - MΩ Common-Mode Input Impedance RIC Theoretical value by design. - 800 - GΩ Input Offset Voltage Trim Viotri Rp=20kΩ - ±3 - mV

Voltage Gain Av1 RL=2kΩ,

Vo= -10V→0V / 0V→+10V / -10V→+10V 130 142 - dB

Av2 Ta=-40 to +85ºC, RL=2kΩ,

Vo= -10V→0V / 0V→+10V / -10V→+10V 126 136 - dB

NJM2729

- 3 -E1

DC CHARACTERISTICS PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT

Output Characteristics Maximum Output Voltage VOM1 RL=10kΩ ±13.5 ±14.0 - V VOM2 Ta=-40 to +85ºC, RL=10kΩ ±13.0 ±14.0 - V VOM3 RL=2kΩ ±12.5 ±13.0 - V VOM4 Ta=-40 to +85ºC, RL=2kΩ ±12.0 ±13.0 - V VOM5 RL=1kΩ ±12.0 ±12.5 - V Output Impedance RO Open-Loop - 60 - Ω Supply Characteristics Supply Current ICC1 AV=+1, RL=∞ - 1.6 2 mA ICC2 Ta=-40 to +85ºC, AV=+1, RL=∞ - 1.7 2.5 mA

ICC3 V+/V-=±3V, AV=+1, RL=∞ - 0.58 0.75 mA

Power Dissipation PD1 AV=+1, RL=∞ - 50 60 mW

PD1 V+/V-=±3V, AV=+1, RL=∞ - 4.2 5.4 mW AC CHARACTERISTICS


Frequency Characteristics Unity Gain Frequency fT AV=+100, RL=2kΩ, CL=10pF - 1.1 - MHz Slew Rate +SR RISE, AV=+1, VIN=1Vpp, RL=2kΩ, CL=10pF 0.1 0.3 - V/µs -SR FALL, AV=+1, VIN=1Vpp, RL=2kΩ, CL=10pF 0.1 0.3 - V/µsNoise Characteristics Equivalent Input Noise Voltage VNI fo=1Hz to 100Hz - 80 - nVrms

Equivalent Input Noise Current INI fo=1Hz to 100Hz - 3 - pArms

NJM2729

- 4 - E1

ELECTRONIC CHARACTERISTICS (V+/V-=±5V Ta=+25ºC, VICM=0V unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT

Input Characteristics Input Offset Voltage VIO1 - 30 70 µV VIO2 Ta=-40 to +85ºC - 35 110 µV Common Mode Input Voltage Range VICM1 ±3 ±3.9 - V VICM2 Ta=-40 to +85ºC ±3 ±3.5 - V Common Mode Rejection Ratio CMR1 VCM=0V→-3V / VCM=0V→+3V 115 130 - dB

CMR2 Ta=-40 to +85ºC, VCM=0V→-3V / VCM=0V→+3V 105 125 - dB

Input Bias Current IB1 -0.2 0.7 2 nA IB2 Ta=-40 to +85ºC -0.2 1 6 nA Input Offset Current IIO1 - 0.3 2.8 nA IIO2 Ta=-40 to +85ºC - 0.3 4.5 nA

Voltage Gain Av1 Open-Loop, RL=2kΩ, Vo= -3V→0V / 0V→+3V / -3V→+3V 115 130 - dB

Av2 Ta=-40 to +85ºC, Open-Loop, RL=2kΩ, Vo= -3V→0V / 0V→+3V / -3V→+3V 110 125 - dB

Output Characteristics Maximum Output Voltage VOM1 RL=10kΩ ±3.5 ±4.0 - V VOM2 Ta=-40 to +85ºC, RL=10kΩ ±3.5 ±4.0 - V VOM3 RL=2kΩ ±3.5 ±4.0 - V VOM4 Ta=-40 to +85ºC, RL=2kΩ ±3.5 ±4.0 - V Supply Characteristics Supply Current ICC1 AV=+1, RL=∞ - 0.85 1.1 mA

ICC2 Ta=-40 to +85ºC, AV=+1, RL=∞ - 0.9 1.25 mA

NJM2729

- 5 -E1

EXPLANATION OF MEASUREMENT CONDITION PARAMETER Explanation

Input Offset Voltage Drift Input Offset Voltage Drift = ΔVIO / Δt

Δt : Amount of Temperature change.

ΔVIO : Amount of Input Offset Voltage.

Common Mode Input Voltage range A range of input voltage at which the operational amplifier can function.

Common Mode Rejection Ratio CMR = 20log | ( ΔVIN / ΔVIO )|

ΔVIN : Amount of Input Voltage.


Supply Voltage Rejection Ratio SVR = 20log |( ΔVS / ΔVIO )|

ΔVS : Amount of supply Voltage.


Common Mode Input Impedance RINCM = ΔVIN / ΔIB


ΔIB : Amount of Input bias current.

Voltage Gain AV = 20log |( ΔVIN / ΔVO )|

ΔVO : Amount of output Voltage.


NJM2729

- 6 - E1

TYPICAL CHARACTERISTICS

0

5

10

15

20

25

30

35

40

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

Input Offset Voltage Drift Distribution

V+/V-=±5V,Ta=-40 to 25

Num

ber O

f Am

plifi

ers

Input Offset Voltage Drift [μV/]

0

5

10

15

20

25

30

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1


V+/V-=±15V,Ta=-40 to 25

Num

ber O

f Am

plifi

ers


0

5

10

15

20

25

30

35

40

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

Input Offset Volotage Drift Distribution

V+/V-=±5V,Ta=25 to 85

Num

ber O

f Am

plifi

ers


0

5

10

15

20

25

30

35

40

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1


V+/V-=±15V,Ta=25 to 85

Num

ber O

f Am

plifi

ers


0

10

20

30

40

50

-70-60-50-40-30-20-10 0 10 20 30 40 50 60 70

Input Offset Voltage Distribution

V+/V-=±5V,Ta=25

Num

ber O

f Am

plifi

ers

Input Offset Voltage [μV]

0

10

20

30

40

50

-70-60-50-40-30-20-10 0 10 20 30 40 50 60 70

Input Offset Voltage Distribution

V+/V-=±15V,Ta=25

Num

ber O

f Am

plifi

ers

Input Offset Voltage [μV]

NJM2729

- 7 -E1


-100

-50

0

50

100

-50 -25 0 25 50 75 100 125

Input Offset Voltage vs. Temperature(Supply Voltage)

VCM=0V

Inpu

t Offs

et V

olta

ge [μ

V]

Ambient Temperature []

Sample2 (±15V)Sample1 (±15V)

Sample3 (±15V)

Sample3 (±5V)


-10

0

10

20

30

40

50

0 4 8 12 16 20 24

Input Offset Voltage vs. Supply VoltageVCM=0V

Inpu

t Offs

et V

oltg

e [μ

V]

Supply Voltage [±V]

Sample2

Sample1

Sample3

-1

0

1

2

3

4

0 4 8 12 16 20 24

Input Bias Curent vs. Supply VoltageVCM=0V

Inpu

t Bia

s C

urre

nt [n

A]


Sample2Sample1

Sample3

-100

-50

0

50

100

-50 -25 0 25 50 75 100 125

Input Offset Voltage vs. Temperature(Supply Voltage)

VCM=0V

Inpu

t Offs

et V

oltg

e [μ

V]


V+/V-=±18VV+/V-=±15V

V+/V-=±5VV+/V-=±3V

Input Offset Voltage vs. TemperatureV+/V-=±15V, VCM=0V

-100

-80

-60

-40

-20

0

20

40

60

80

100

-50 -25 0 25 50 75 100Ambient Temperature [ºC]

Inpu

t Offs

et V

olta

ge [μ

V]

Input Offset Voltage vs. TemperatureV+/V-=±5V, VCM=0V

-100

-80

-60

-40

-20

0

20

40

60

80

100

-50 -25 0 25 50 75 100Ambient Temperature [ºC]

Inpu

t Offs

et V

olta

ge [μ

V]

NJM2729

- 8 - E1


-20

-10

0

10

20

30

40

50

60

-15 -10 -5 0 5 10 15

Input Offset Voltage vs. Common Mode Input Voltage (Temperature)

V+/V-=±15V

Inpu

t offs

et V

olta

ge [μ

V]

Common Mode Input Voltage [V]

Ta=-40

Ta=25 Ta=85

0

10

20

30

40

50

0 4 8 12 16 20 24

Input Offset Voltage vs. Supply Voltage(Temperature)

Vcm=0V

Inpu

t offs

et V

olta

ge [μ

V]


Ta=-40

Ta=25

Ta=85

-1

0

1

2

3

4

0 50 100 150 200

Warm Up Input Offset Voltage Drift

V+/V-=±15V, Gv=100dB, Ta=25

Inpu

t Offs

et V

olta

ge C

hang

e [μ

V]

Time From Power Supply Turn On [sec]

-20

-10

0

10

20

30

40

50

60

-20 -15 -10 -5 0 5 10 15 20

Input Offset Voltage vs. Common Mode Input Voltage (Supply Voltage)

Ta=25

Inpu

t Offs

et V

olta

ge [μ

V]


V+/V-=±18VV+/V-=±15V

V+/V-=±5V

V+/V-=±3V

-8

-6

-4

-2

0

2

4

6

8

-15 -10 -5 0 5 10 15

Variation in Input Offset Voltage vs. Common Mode Input Voltage

Varia

tion

in In

put O

ffset

Vol

tage

[µV]


-20

-10

0

10

20

30

40

50

60

-15 -10 -5 0 5 10 15

Input Offset Voltage vs. Common Mode Input Voltage

(Supply Voltage)Ta=25

Inpu

t Offs

et V

olta

ge [μ

V]


Sample2 (±15V)

Sample1 (±15V)

Sample3 (±15V)

Sample3 (±5V)

Sample2 (±5V)

Sample1 (±5V)

NJM2729

- 9 -E1


-16.5

-16

-15.5

-15

-14.5

-14

-13.5

-13

-12.5

-15 -10 -5 0 5 10 15

Input Offset Voltage vs. Output Voltage

V+/V-=±15V, Gv=100dB, R L=2kΩ, Ta=25

Inpu

t Offs

et V

olta

ge [u

V]

Output Voltage [V]

-4

-3

-2

-1

0

1

2

3

4

0 5 10 15 20

Input Offset Voltage vs. Trim Resistance

V+/V-=±15V, Gv=60dB, Ta=25

Inpu

t Offs

et V

olta

ge [m

V]

Trim resistance Rp [kΩ]

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

0 2 4 6 8 10

Equivalent Input Noise Voltage

V+/V-=±15V, BP=1~100Hz

Equi

vale

nt In

put N

oise

Vol

tagt

e [μ

V]

Time [sec]

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

0 2 4 6 8 10

Equivalent Input Noise Voltage

V+/V-=±5V, BP=1~100Hz

Equi

vale

nt In

put N

oise

Vol

tage

[μV

]

Time [sec]

0

2

4

6

8

10

12

14

16

1 10 100 1000

Equivalent Input Noise VoltageRf=10kΩ, Rs=100Ω, Rg=100Ω, Ta=25

Equi

vale

nt In

put N

oise

Vol

tage

[nV/

√Hz]

Frequency [Hz]

V+/V-=±15V

V+/V-=±5V

NJM2729

- 10 - E1


-1

-0.5

0

0.5

1

1.5

2

2.5

3

-15 -10 -5 0 5 10 15

Input Bias Current vs. Common Mode Input Voltage(Temperature)

V+/V-=±15V

Inpu

t Bia

s C

urre

nt [n

A]


Ta=-40

Ta=25

Ta=85

0

2

4

6

8

10

-50 -25 0 25 50 75 100 125

Input Bias Current vs. Temperature(Supply Voltage)

VCM=0V

Inpu

t Bia

s C

urre

nt [n

A]


V+/V-=±18V

V+/V-=±15V

V+/V-=±5VV+/V-=±3V

-1

-0.5

0

0.5

1

1.5

2

2.5

3

-20 -15 -10 -5 0 5 10 15 20

Input Bias Current vs. Common Mode Input Voltage(Supply Voltage)

Ta=25

Inpu

t Bia

s C

urre

nt [n

A]


V+/V-=±18VV+/V-=±15V

V+/V-=±5VV+/V-=±3V

-1

0

1

2

3

4

5

6

-50 -25 0 25 50 75 100 125

Input Offset Current vs. Temperature(Supply Voltage)

VCM=0V

Inpu

t Offs

et C

urre

nt [n

A]


V+/V-=±18V

V+/V-=±15V

V+/V-=±5VV+/V-=±3V

0

2

4

6

8

10

-50 -25 0 25 50 75 100 125

Input Bias Current vs. Temperature(Supply Voltage)

VCM=0V

Inpu

t Bia

s C

urre

nt [n

A]



Sample3 (±15V)


Sample1 (±5V)

0

1

2

3

4

5

-50 -25 0 25 50 75 100 125

Input Offset Current vs. Temperature(Supply Voltage)

VCM=0V

Inpu

t Offs

et C

urre

nt [n

A]



Sample3 (±15V)


Sample1 (±5V)

NJM2729

- 11 -E1


-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

-15 -10 -5 0 5 10 15

Input Offset Current vs. Common Mode Input Voltage(Temperature)

V+/V-=±15V

Inpu

t Offs

et C

urre

nt [n

A]


Ta=-40Ta=25

Ta=85

0

50

100

150

200

-50 -25 0 25 50 75 100 125

Supply Voltage Rejection Ratio vs. Temperature

V+/V-=±18V to ±3V

Supp

ly V

olta

ge R

ejec

tion

Rat

io [d

B]

Temperature []

40

60

80

100

120

140

102 103 104 105

Common Mode Rejection Ratio vs. Frequency

V+/V-=±15V, Gv=80dB, Ta=25

Com

mon

Mod

e R

ejec

tion

Rat

io [d

B]

Frequency [Hz]

20

40

60

80

100

120

140

100 101 102 103 104

Supply Voltage Rejection Ratio vs. Frequency

V+/V-=±14.5 to ±15.5V, Gv=80dB, Ta=25

Supp

ly V

olta

ge R

ejec

tion

Rat

io [d

B]

Frequency [Hz]

-SVR

+SVR

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

-20 -15 -10 -5 0 5 10 15 20

Input Offset Current vs. Common Mode Input Voltage(Supply Voltage)

Ta=25

Inpu

t Offs

et C

urre

nt [n

A]


V+/V-=±18V

V+/V-=±15V

V+/V-=±5V

V+/V-=±3V

0

50

100

150

200

-50 -25 0 25 50 75 100 125

Common Mode Rejection Ratio vs. Temperature(Supply Voltage)

VICM=V- +2V to V+-2V

Com

mon

Mod

e R

ejec

tion

Rat

io [d

B]


V+/V-=±18VV+/V-=±15V V+/V-=±5V

V+/V-=±3V

NJM2729

- 12 - E1


-20

-15

-10

-5

0

5

10

15

20

-50 -25 0 25 50 75 100 125

Maximum output Voltage vs. Temperature(Supply Voltage)

RL=2kΩ

Max

imum

out

put V

olta

ge [V

]

Ambient Temperature [Ω]

V+/V-=±18V

V+/V-=±18V

V+/V-=±15V

V+/V-=±15V

V+/V-=±5V

V+/V-=±5V

V+/V-=±3V

V+/V-=±3V

0

50

100

150

200

-50 -25 0 25 50 75 100 125

Voltage Gain vs. Temperature(Supply Voltage)

RL=2kΩ

Volta

ge G

ain

[dB

]


V+/V-=±18VV+/V-=±15V

V+/V-=±5V V+/V-=±3V

100

110

120

130

140

150

160

0 4 8 12 16 20 24

Voltage Gain vs. Supply Voltage(Temperature)

RL=2kΩ

Volta

ge G

ain

[dB

]


Ta=-40Ta=25

Ta=85

-15

-10

-5

0

5

10

15

0 5 10 15 20 25 30 35 40

Output Voltage vs. Output Current

V+/V-=±15V

Out

put C

urre

nt [V

]

Output Current [mA]

+VOM Ta=25

-VOM Ta=25

+VOM Ta=-40

-VOM Ta=-40

-VOM Ta=85

+VOM Ta=85

-20

-15

-10

-5

0

5

10

15

20

101 102 103 104 105

Maximum Output Voltage vs. Load Resistance(Supply Voltage)

Ta=25

Max

imum

Out

put V

olta

ge [V

]

Load Resistance [Ω]

V+/V-=±18V

V+/V-=±18V

V+/V-=±15V

V+/V-=±15V

V+/V-=±5V

V+/V-=±5V

V+/V-=±3V

V+/V-=±3V

-15

-10

-5

0

5

10

15

101 102 103 104 105

Maximum Output Voltage vs. Load Resistance(Temperature)

V+/V-=±15V

Max

imum

out

put V

olta

ge [V

]

Load Resistance [Ω]

Ta=-40

Ta=-40

Ta=25

Ta=25

Ta=85

Ta=85

NJM2729

- 13 -E1


0.0001

0.001

0.01

0.1

1

10

0.01 0.1 1 10

THD+N vs. Output Voltage

V+/V-=±15V, Gv=20dB, R F=10kΩ,Rs=1kΩ, Ta=25

THD

+N [%

]

Output Voltage [Vrms]

f=20Hzf=100Hz

f=1kHz

f=20kHz

0

0.2

0.4

0.6

0.8

1

10 100 1000 104 105 106

THD+N vs. Frequency

V+/V-=±15V, Gv=20dB, R F=10kΩ,Rs=1kΩ, Vout=100mVrms, Ta=25

THD

+N [%

]

Frequency [Hz]

-40

-20

0

20

40

60

80

-180

-120

-60

0

60

120

180

102 103 104 105 106 107

40dB Gain/Phase vs. Frequency (Temperature)

V+/V-=±15V, Gv=40dB, R F=10kΩ, Rs=100Ω, RT=50Ω

Volta

ge G

ain

[dB] Phase [deg]

Frequency [Hz]

Gain

Phase

Ta=25

Ta=85

Ta=-40

Ta=85

Ta=-40Ta=25

-40

-20

0

20

40

60

80

-180

-120

-60

0

60

120

180

102 103 104 105 106 107

40dB Gain/Phase vs. Frequency (Load Capacitance)

V+/V-=±15V, Gv=40dB, R F=10kΩ,Rs=100Ω, RT=50Ω, Ta=25

Volta

ge G

ain

[dB

]

Phase [deg]

Frequency [Hz]

Gain

PhaseCL=0F

CL=0.2μF

CL=0.1μF

CL=0.01μF

CL=0.047μF

CL=0F

CL=0.2μFCL=0.1μF

CL=0.01μFCL=0.047μF

-40

-20

0

20

40

60

80

-180

-120

-60

0

60

120

180

102 103 104 105 106 107

40dB Gain/Phase vs. Frequency (Supply Voltage)Gv=40dB, R F=10kΩ, Rs=100Ω,

RT=50Ω, Ta=25

Volta

ge G

ain

[dB

]

Phase [deg]

Frequency [Hz]

Gain

Phase

V+/V-=±15V

V+/V-=±5V

V+/V-=±3V

V+/V-=±3V

V+/V-=±18V

V+/V-=±5V

V+/V-=±18V

V+/V-=±15V

-40

-20

0

20

40

60

80

-180

-120

-60

0

60

120

180

102 103 104 105 106 107

40dB Gain/Phase vs. Frequency (Temperature)

V+/V-=±5V, Gv=40dB, R F=10kΩ, Rs=100Ω, RT=50Ω

Volta

ge G

ain

[dB

]

Phase [deg]

Frequency [Hz]

gain

Phase

Ta=25

Ta=85

Ta=-40

Ta=85

Ta=-40Ta=25

NJM2729

- 14 - E1


-10

-5

0

5

10

15

20

103 104 105 106

V.F.Peak (Temperature)

V+/V-=±15V, Gv=0dB, R T=50Ω, CL=0.1μF

Vol

tage

Gai

n [d

B]

Frequency [Hz]

Ta=25

Ta=85

Ta=-40

-10

-5

0

5

10

15

20

103 104 105 106

V.F.Peak (Load Capacitance)

V+/V-=±15V, Gv=0dB, R T=50Ω, Ta=25

Volta

ge G

ain

[dB

]

Frequency [Hz]

CL=0F

CL=0.01μF

CL=0.047μF

CL=0.2μF

CL=0.1μF

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-2 -1 0 1 2 3 4 5 6

Pulse Response (Temperature)

V+/V-=±15V, RL=2kΩ, CL=5pF

Out

put [

V] Input [V]

Time [μs]

Ta=-40

Ta=25

Ta=85

Input

Output

-10

-5

0

5

10

15

20

103 104 105 106

V.F. Peak (Supply Voltage)Gv=0dB, RT=50Ω, CL=0.1μF, Ta=25

Volta

ge G

ain

[dB

]

Frequency [Hz]

V+/V-=±15V

V+/V-=±3VV+/V-=±5V

V+/V-=±18V

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-2 -1 0 1 2 3 4 5 6



Out

put [

V] Input [V]

Time [μs]

Ta=-40Ta=25

Ta=85

Input

Output

NJM2729

- 15 -E1


-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-20 -10 0 10 20 30 40 50 60

Pulse Response (Load Capacitance)

V+/V-=±15V, RL=2kΩ, Ta=25

Out

put [

V] Input [V]

Time [μs]

CL=0.01μF

Input

Output

CL=0.047μFCL=0.1μF

CL=0.2μF

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-20 -10 0 10 20 30 40 50 60

Pulse Response (Load Capacitance)

V+/V-=±15V, RL=2kΩ, Ta=25

Out

put [

V] Input [V]

Time [μs]

CL=0.01μF

Input

Output CL=0.047μFCL=0.1μF

CL=0.2μF

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-2 -1 0 1 2 3 4 5 6



Out

put [

V] Input [V]

Time [μs]

Ta=-40

Ta=25

Ta=85

Input

Output

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-2 -1 0 1 2 3 4 5 6



Out

put [

V] Input [V]

Time [μs]

Ta=-40Ta=25

Ta=85

Input

Output

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-5 0 5 10

Pulse Response (Supply Voltage, Load Capacitance)

RL=2kΩ, Ta=25

Out

put [

V] Input [V]

Time [μs]

V+/V-=±15VCL=100pFInput

Output

V+/V-=±15VCL=1500pF

V+/V-=±5VCL=1500pF

V+/V-=±5VCL=100pF

-0.8

-0.4

0

0.4

0.8

1.2

1.6

2

-2

-1.6

-1.2

-0.8

-0.4

0

0.4

0.8

-5 0 5 10

Pulse Response (Supply Voltage, Load Capacitance)

RL=2kΩ, Ta=25

Out

put [

V] Input [V

]

Time [μs]

V+/V-=±15VCL=100pF

Input

Output

V+/V-=±15VCL=1500pF

V+/V-=±5VCL=1500pF

V+/V-=±5VCL=100pF

NJM2729

- 16 - E1


0

0.4

0.8

1.2

1.6

2

2.4

0 4 8 12 16 20 24

Supply Current vs. Supply Voltage (Temperature)RL=∞

Supp

ly C

urre

nt [m

A]


Ta=-40

Ta=25

Ta=85

0

0.4

0.8

1.2

1.6

2

2.4

-50 -25 0 25 50 75 100 125

Supply Current vs. Temperature (Supply Voltage)

RL=∞

Supp

ly C

urre

nt [m

A]


V+/V-=±18V

V+/V-=±15VV+/V-=±5V

V+/V-=±3V

0

0.5

1

1.5

2

-50 -25 0 25 50 75 100 125

Unity Gain Frequency vs. TemperatureGv=40dB, RF=10kΩ, Rs=100Ω, R T=50Ω

Uni

ty G

ain

Freq

uenc

y [M

Hz]

Temperature []

V+/V-=±15V

V+/V-=±5V

0

0.2

0.4

0.6

0.8

1

-50 -25 0 25 50 75 100 125

Slew Rate vs. TemperatureRL=2kΩ

Slew

Rat

e [V

/μs]


V+/V-=±15VRISEV+/V-=±15V

FALL

V+/V-=±5VRISE

V+/V-=±5VFALL

NJM2729

- 17 -E1

Application Information Power Supply Bypassing

The NJM2729 is a high precision operational amplifier featuring low offset voltage, high voltage gain, high CMR, high SVR and so on. To maximize such a high performance with stable operation, the NJM2729 should be operated by clean and low impedance supply voltage. So, the bypass capacitor should be connected to the NJM2729’s both power supply terminals (V+ and V-) as shown in Fig.1. The bypass capacitors should be placed as close as possible to IC package

Thermoelectric Effect

The NJM2729 is a high precision operational amplifier featuring low offset voltage and low offset voltage thermal drift. To achieve such a high performance, take care about thermoelectric effect possibly occurs on each input terminal of the NJM2729. Generally, if there are thermal mismatches at the junction of different types of metals, the thermoelectric voltage (Seebeck effect) occurs at the junction. The thermoelectric voltages possibly occur at the junction of PCB metal patterns and NJM2729’s each input terminal metal. If there is thermal mismatch in-between NJM2729’s each input terminal metal, the thermoelectric voltages generated on each input terminal possibly have different voltage each. This voltage difference causes offset voltage and offset voltage thermal drift of the NJM2729. To minimize this voltage difference, the thermal mismatch in-between NJM2729’s each input terminal and PCB metal should be minimized.

Offset Voltage Adjustment

The NJM2729 has offset voltage trim terminals (pin1 and pin8) as shown in below Fig.2. By connecting external potentiometer in the range of 20Kohm, the offset voltage trim range is ±3mV. This offset voltage trim is effective only for offset voltage at room temperature, not for offset voltage thermal drift. If offset voltage adjustment is not in use, leave pin1 and pin8 open (un-connected).

−

+

V+

V-

2

3 4

6

7

NJM2729

−

+

V+

V-

1

2

3 4

6

7 8

Rp=20kΩ

NJM2729

Fig.1 Power Supply Bypassing Circuit

Fig.2 Offset Voltage Trim Circuit

NJM2729

- 18 - E1

Differential Amplifier Differential amplifier (see below Fig.3) is used in high accuracy circuit to improve common mode rejection ratio (CMR). A matching between the ratio R1/R2 = R3/R4 and R1=R3 makes the high CMR. For example, acceptable error range to obtain CMR of 130dB or more is about 0.1ppm.

[CAUTION] The specifications on this data book are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this data book are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

−

+

V+

V-

2

3 4

6

7

NJM2729

R1

R2

R3

R4

Fig.3 Differential Amplifier

Precision Operational Amplifier: Precision AmplifiersThe NJM2729 is a high performance oper ational...

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Transcript of Precision Operational Amplifier: Precision AmplifiersThe NJM2729 is a high performance oper ational...