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S89430 데이터시트(PDF) 14 Page - Seiko Instruments Inc

부품명 S89430
상세설명  MINI ANALOG SERIES 0.5 uA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER
PDF  33 Pages
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제조업체  SII [Seiko Instruments Inc]
홈페이지  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S89430 데이터시트(HTML) 14 Page - Seiko Instruments Inc

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MINI ANALOG SERIES 0.5
μA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER
S-89430/89431 Series
Rev.2.1_01
14
9. Voltage gain (open loop)
RF
RS
+
−
RL
VOUT
VM
VDD / 2
VDD
−
+
VDDN
VSSN
NULL
D.U.T
RS
RF
VCMR = VDD / 2
Figure 16
• Voltage gain (open loop) (AVOL)
The voltage gain (AVOL) can be calculated by the following expression, with VOUT measured at each VM.
Test conditions:
When VM = VDD
− 0.1 V: VM = VM1, VOUT = VOUT1,
When VM = VSS
− 0.1 V: VM = VM2, VOUT = VOUT2
RL = 1 M
Ω
AVOL = 20 log
VM1
− VM2
VOUT1
− VOUT2 ×
RF
+ RS
RS
10. Slew rate (SR)
Measured by the voltage follower circuit.
VDD
VSS
(= 0 V)
tTHL
VDD
× 0.9
tR = tF = 1
μs (VSS to VDD)
tTLH
VDD
× 0.1
VIN(+)
VOUT
(= VIN(－))
At fall
SR =
VDD
× 0.8
tTHL
At rise
SR =
VDD
× 0.8
tTLH
Figure 17



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