BU7481SG-TR datasheet(11/22 Pages) ROHM

Part #	BU7481SG-TR

Description	High Speed Low Voltage Operation CMOS Operational Amplifiers

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Manufacturer	ROHM [Rohm]

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Datasheet

www.rohm.com

TSZ02201-0RAR0G200370-1-2

11/18

17.Jan.2014 Rev.001

TSZ22111･15･001

BU7481G

BU7481SG

Application Information

NULL method condition for Test Circuit 1

VDD, VSS, EK, VICM Unit: V

Parameter

VF

SW1

SW2

SW3

VDD

VSS

EK

VICM

Calculation

Input Offset Voltage

VF1

ON

OFF

3

0

-1.5

1.8

1

Large Signal Voltage Gain

VF2

ON

3

0

-0.5

0.9

2

VF3

-2.5

Common-mode Rejection Ratio

(Input Common-mode Voltage Range)

VF4

ON

OFF

3

0

-1.5

0

3

VF5

1.8

Power Supply Rejection Ratio

VF6

ON

OFF

1.8

0

-0.9

0

4

VF7

ON

OFF

5.5

- Calculation -

1. Input Offset Voltage (VIO)

2. Large Signal Voltage Gain (AV)

3. Common-mode Rejection Ration (CMRR)

4. Power Supply Rejection Ratio (PSRR)

Figure 24. Test Circuit 1

VICM

RS=50Ω

RF=50kΩ

RI=1MΩ

0.015

μF

0.015

μF

SW1

SW2

50k

Ω

SW3

RL

VRL

0.1

μF

EK

500k

Ω

500k

Ω

1000pF

VF

0.01

μF

15V

-15V

VDD

VSS

Vo

V

NULL

DUT

|VF5 - VF4|

CMRR = 20Log

V

ICM × (1+RF/RS)

[dB]

Av = 20Log

|VF3 - VF2|

E

K × (1+RF/RS)

[dB]

PSRR = 20Log

|VF7 - VF6|

VDD × (1+ R

F/RS)

[dB]

VIO =

1 + RF/RS

[V]

|VF1|

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BU7481SG-TR Datasheet(PDF) 11 Page - Rohm

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