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LMR321GFVT-E2 Datasheet(PDF) 28 Page - Rohm

Part # LMR321GFVT-E2
Description  Ground sense Low Power General Purpose Operational amplifiers
PDF  41 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

LMR321GFVT-E2 Datasheet(HTML) 28 Page - Rohm

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Datasheet
www.rohm.com
TSZ02201-0RAR1G200560-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
28/38
30.NOV.2012 Rev.001
TSZ22111･15･001
LMR321G, LMR358xxx, LMR324xxx
●Application Information
NULL method condition for Test Circuit 1
VDD, VSS, EK, Vicm Unit:V
Parameter
VF
S1
S2
S3
VDD
VSS
EK
Vicm
Calculation
Input Offset Voltage
VF1
ON
ON
OFF
5
0
-2.5
2.1
1
Large Signal Voltage Gain
VF2
ON
ON
ON
5
0
-1.5
2.1
2
VF3
-3.5
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
VF4
ON
ON
OFF
5
0
-1.5
0
3
VF5
1.8
Power Supply Rejection Ratio
VF6
ON
ON
OFF
3
0
-2.9
4
4
VF7
5
－ Calculation－
1. Input Offset Voltage (Vio)
2. Large Signal Voltage Gain(Av)
3. Common-mode Rejection Ratio (CMRR)
4. Power Supply Rejection Ratio (PSRR)
Figure 74. Test circuit 1 (one channel only)
Vio
|VF1|
=
1+RF/RS
[V]
Av
|VF2-VF3|
=
2 × (1+RF/RS)
[dB]
20Log
CMRR
|VF4 - VF5|
=
1.8 × (1+RF/RS) [dB]
20Log
PSRR
|VF6 - VF7|
=
3.8 × (1+ RF/RS)
[dB]
20Log
VDD
RF=50kΩ
Ri=1MΩ
0.015µF
RS=50Ω
RL
SW2
500kΩ
500kΩ
0.01µF
EK
15V
DUT
VSS
VRL
50kΩ
Vicm
SW1
0.015µF
Ri=1MΩ
Vo
VF
RS=50Ω
1000pF
0.1µF
-15V
NULL
SW3



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