BAB902SF(2009) 查看數據表（PDF） - ROHM Semiconductor

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BAB902SF
(Rev.:2009)

ROHM’s Selection Operational Amplifier / Comparator Series Operational Amplifiers: Ground Sense

ROHM Semiconductor 

BA10358F/FV,BA10324AF/FV,BA2904SF/FV/FVM,BA2904F/FV/FVM,BA2904HFVM-C,

BA2902SF/FV/KN,BA2902F/FV/KN,BA3404F/FVM

●Circuit Diagram

VCC

VCC

Technical Note

－IN

－IN

VOUT＋IN

＋IN

VOUT

VEE

VEE

BA10358/BA10324A/BA2904S/BA2904/

BA2902S/BA2902/BA2904H simplified schematic

BA3404 simplified schematic

Fig. 119 Circuit Diagram (one channel only)

●Test circuit1 NULL method

VCC,VEE,EK,Vicm Unit：[V]

Parameter

BA2904S/BA2904 family

BA10358/BA10324A family BA2902S/BA2902 family

VF S1 S2 S3

BA2904HFVM-C

BA3404 family

Calculation

Vcc VEE EK Vicm Vcc VEE EK Vicm VCC VEE EK Vicm

Input Offset Voltage VF1 ON ON OFF 5 0 -1.4 0 5～30 0 -1.4 0 15 -15 0 0

1

Input Offset Current VF2 OFF OFF OFF 5 0 -1.4 0 5 0 -1.4 0 15 -15 0 0

2

VF3 OFF ON

Input Bias Current

OFF 5 0 -1.4 0 5 0 -1.4 0 15 -15 0 0

3

VF4 ON OFF

Large Signal

Voltage Gain

VF5

15 0 -1.4 0 15 0 -1.4 0 15 -15 10 0

ON ON ON

VF6

15 0 -11.4 0 15 0 -11.4 0 15 -15 -10 0

4

Common-mode

Rejection Ratio

VF7

(Input common-mode

Voltage Range)

VF8

ON ON OFF

5

5

0 -1.4 0 5

0 -1.4 3.5 5

0 -1.4 0 15 -15 0 -15

0 -1.4 3.5 15 -15 0 13

5

Power Supply

Rejection Ratio

VF9

5

0 -1.4 0

5 0 -1.4 0

2 -2 0

ON ON OFF

VF10

30 0 -1.4 0 30 0 -1.4 0 15 -15 0

0

0

6

-Calculation-

1. Input Offset Voltage (Vio)

| VF1 |

Vio =

[V]

1 + Rf / Rs

2. Input Offset Current (Iio)

| VF2－VF1 |

Iio =

[A]

Ri ×(1 + Rf / Rs)

3. Input Bias Current (Ib)

| VF4－VF3 |

Ib =

[A]

2×Ri× (1 + Rf / Rs)

4. Large Signal Voltage Gain (Av)

Av = 20×Log ΔEK×(1+Rf /Rs) [dB]

| VF 5-VF 6|

5. Common-mode Rejection Ration (CMRR)

CMRR = 20×Log ΔVicm×(1+Rf /Rs) [dB]

| VF 8-VF 7|

6. Power supply rejection ratio (PSRR)

PSRR = 20×Log ΔVcc×(1+Rf /Rs) [dB]

| VF 10-VF 9|

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C2

0.1[μF]

S1

Vicm

Rs

Ri

50[Ω] 10[kΩ]

50[Ω] 10[kΩ]

Rs

Ri

S2

VCC

DUT

VEE

Rf

50[kΩ]

EK

RK

500[kΩ]

RK 500[kΩ]

S3

C3

1000[pF]

RL

C1

0.1[μF]

+15[V]

NULL

-15[V]

V VF

Fig. 120 Measurement circuit1 (one channel only)

17/24

2009.05 - Rev.A

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