BA14741FJ データシートの表示（PDF） - ROHM Semiconductor

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BA14741FJ

Low Noise Operational Amplifiers

ROHM Semiconductor 

BA14741xx

Datasheet

●Application Information

Test circuit1 NULL method

Parameter

Input Offset Voltage

VCC, VEE, EK, Vicm Unit: V

VF

S1

S2

S3

BA14741

calculation

VCC VEE EK Vicm

VF1

ON

ON OFF

15

-15

0

0

1

Input Offset Current

VF2 OFF OFF OFF 15

-15

0

0

2

Input Bias Current

VF3 OFF ON

OFF 15

-15

0

0

3

VF4 ON OFF

Large Signal Voltage Gain

VF5

15

-15

-10

0

ON

ON

ON

4

VF6

15

-15

10

0

Common-mode Rejection Ratio

VF7

3

-27

12

0

ON

ON OFF

5

(Input common-mode Voltage Range)

VF8

27

-3

-12

0

Power Supply

Rejection Ratio

VF9

2

-2

0

0

ON

ON OFF

6

VF10

15

-15

0

0

-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]

VF5 - VF6

0.1μF

Vicm

SW1

RS＝50Ω Ri=10kΩ

RS＝50Ω Ri=10kΩ

SW2

50kΩ

VCC

RF=50kΩ

500kΩ

EK

DUT

SW3

RL

VEE

500kΩ

1000pF

0.1μF

15V

NULL

-15V

Figure 24. Test circuit1 (one channel only)

5. Common-mode Rejection Ration (CMRR)

CMRR  20×Log ΔVicm×(1+RF/RS) [dB]

VF8 - VF7

V VF

6. Power supply rejection ratio (PSRR)

PSRR  20×Log ΔVcc ×(1+RF/RS) [dB]

VF10 - VF9

Test Circuit 2 Switch Condition

SW No.

Supply Current

Maximum Output Voltage High

Maximum Output Voltage Low

Output Source Current

Output Sink Current

Slew Rate

Gain Bandwidth Product

Equivalent Input Noise Voltage

SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10 SW11 SW12 SW13 SW14

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

ON

ON

ON

ON

OFF

OFF

OFF

ON

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

ON

ON

ON

ON

ON

OFF

ON

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

ON

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

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TSZ22111･15･00

12/18

TSZ02201-0RAR1G200060-1-2

9.NOV.2012 Rev.001

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