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S89430 Datasheet(PDF) 11 Page - Seiko Instruments Inc

Part # S89430
Description  MINI ANALOG SERIES 0.5 uA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER
PDF  33 Pages
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S89430 Datasheet(HTML) 11 Page - Seiko Instruments Inc

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MINI ANALOG SERIES 0.5
μA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER
Rev.2.1_01
S-89430/89431 Series
11
Test Circuit (Per Circuit)
1. Power supply voltage rejection ratio
RF
RS
RS
RF
+
−
VOUT
VDD
0.45 V
• Power supply voltage rejection ratio (PSRR)
The power supply voltage rejection ratio (PSRR) can be
calculated by the following expression, with VOUT measured at
each VDD.
Test conditions:
When VDD = 0.9 V: VDD = VDD1, VOUT = VOUT1,
When VDD = 5.5 V: VDD = VDD2, VOUT = VOUT2
PSRR = 20 log
VDD1
− VDD2
VOUT1
− VOUT2 ×
RF
+ RS
RS
Figure 8
2. Input offset voltage
RF
RS
RS
RF
+
−
VOUT
VDD
VCMR = VDD / 2
• Input offset voltage (VIO)
VIO = 

VOUT
−
VDD
2
×
RS
RF
+ RS
Figure 9



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