Technical Note

12/17

LM393DR/PWR/DGKR,LM2903DR/PWR/DGKR/VQDR/VQPWR

LM339DR/PWR,LM2901DR/PWR/VQDR/VQPWR

www.rohm.com

2011.06 - Rev.B

© 2011 ROHM Co., Ltd. All rights reserved.

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Circuit Diagram

Fig.87 Circuit Diagram (each Comparator)

●

Measurement circuit 1 NULL Method measurement condition

Vcc,GND,EK,VICR Unit：[V］

Parameter

VF

S1

S2

S3

LM393/LM339 family

LM2903/LM2901 family

Calculation

Vcc

GND

EK

VICR

Vcc

GND

EK

VICR

Input Offset Voltage

VF1

ON

ON

ON 5 to 30

0

-1.4

0

5 to 30

0

-1.4

0

1

Input Offset Current

VF2 OFF OFF

ON

5

0

-1.4

0

5

0

-1.4

0

2

Input Bias Current

VF3 OFF

ON

ON

5

0

-1.4

0

5

0

-1.4

0

3

VF4

ON

OFF

5

0

-1.4

0

5

0

-1.4

0

Large Signal

Voltage Gain

VF5

ON

ON

ON

15

0

-1.4

0

15

0

-1.4

0

4

VF6

15

0

-11.4

0

15

0

-11.4

0

1.Input offset voltage (VIO)

2.Input offset current (IIO)

3.Input bias current (IIb)

4.Large signal differential voltage gain (AVD)

[V]

/Rs

Rf

1+

VF1

Vio 

/ Rs)

Rf

(1+

Ri

VF1

VF2 -

Iio 

[A]

VF6 - VF5

/Rs)

Rf

(1+

Log

20×



10×

AV

[dB]

Fig.88 Measurement Circuit1 (each Comparator)

/

Rf

(1+

Ri

2×

VF3

VF4 -

Ib



[A]

/ Rs)

Vcc

0.1[μF]

Rf

50[kΩ]

S1

Ri＝10[kΩ]

RS＝50[Ω]

S2

RL

S3

1000[pF]

500[kΩ]

500[kΩ]0.1[μF]

RK

EK

RK

+15[V]

-15[V]

NULL

DUT

GND

VRL

Ri＝10[kΩ]

RS＝50[Ω]

50[kΩ]

VICR

IN+

IN-

Vcc

OUT

GND