S-89130BC-I8T1U Datasheet, PDF (10/26 Pages) Seiko Instruments Inc – MINI ANALOG SERIES

MINI ANALOG SERIES CMOS OPERATIONAL AMPLIFIER
S-89130/89140 Series
Rev.1.0_01
 Test Circuit (Per Circuit)
1. Power supply voltage rejection ratio, input offset voltage
V_DD
R_F
• 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.
R_S
−
+
R_S
R_F
V_CMR = V_DD / 2
Figure 5
V_OUT
Test conditions:
VDD = 2.7 V: VDD = VDD1, VOUT = VOUT1,
VDD = 5.5 V: VDD = VDD2, VOUT = VOUT2
PSRR = 20 log


VDD1 − VDD2
^{VOUT1 − VD}2^D1 ^− ^{VOUT2 − VD}2^D2
× ^RF_R⁺_S^RS_{}
• Input offset voltage (VIO)
VIO =
^{VOUT − V}2^DD
×
RS
RF + RS
2. Common-mode input signal rejection ratio, common-mode input voltage range
V_DD
R_F
• Common-mode input signal rejection ratio (CMRR)
The common-mode input signal rejection ratio (CMRR) can be
calculated by the following expression, with VOUT measured at
each VIN.
R_S
−
+
R_S
R_F
V_OUT
Test conditions:
VIN = VCMR Max.: VIN = VIN1, VOUT = VOUT1,
VIN = VCMR Min.: VIN = VIN2, VOUT = VOUT2
CMRR = 20 log

VIN1 − VIN2
VOUT1 − VOUT2
× ^RF_R⁺_S^RS_{}
V_IN
V_DD / 2
Figure 6
• Common-mode input voltage range (VCMR)
The common mode input voltage range (VCMR) is the range of
VIN in which the common mode input signal rejection ratio
(CMRR) is satisfied when VIN is varied.
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