S-19610AB0A-K8T2U Datasheet, PDF (7/18 Pages) Seiko Instruments Inc – MINI ANALOG SERIES

MINI ANALOG SERIES FOR AUTOMOTIVE 125°C OPERATION CMOS OPERATIONAL AMPLIFIER
Rev.1.0_01
S-19610A
 Test Circuits (Per Circuit)
1. Power supply voltage rejection ratio, input offset voltage
V_DD
• Power supply voltage rejection ratio (PSRR)
R_F
R_S
−
+
R_S
R_F
V_CMR = V_DD / 2
V_OUT
The power supply voltage rejection ratio (PSRR) can be
calculated by the following expression, with VOUT measured at
each VDD.
Test conditions:
VDD = 2.70 V: VDD = VDD1, VOUT = VOUT1,
VDD = 5.50 V: VDD = VDD2, VOUT = VOUT2
PSRR = 20 log


^VOUT1
−
VDD1
VD₂D1_
−
−
VDD2
^VOUT2
−
VD₂D2_
× ^RF_R⁺_S^RS_{}
Figure 3 Test Circuit 1
• 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
• Common-mode input signal rejection ratio (CMRR)
R_F
R_S
−
+
R_S
R_F
V_OUT
V_IN
V_DD / 2
Figure 4 Test Circuit 2
The common-mode input signal rejection ratio (CMRR) can be
calculated by the following expression, with VOUT measured at
each VIN.
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_{}
• 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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