S-89530A Datasheet, PDF (7/16 Pages) Seiko Instruments Inc – MINI ANALOG SERIES 0.7 μA Rail-to-Rail CMOS COMPARATOR

Rev.3.1_00
MINI ANALOG SERIES 0.7 μA Rail-to-Rail CMOS COMPARATOR
S-89530A/89531A
„ Measurement Circuits
1. Power supply voltage rejection ratio
V_DD
−
+
VIN 0.45 V
VOUT
y The power supply voltage rejection ratio (PSRR) is
calculated by the following expression, with the value of
V_IO measured at each V_DD.
Measurement conditions:
When V_DD = 0.9 V: V_DD = V_DD1, V_IO = V_IO1
When V_DD = 5.5 V: V_DD = V_DD2, V_IO = V_IO2
PSRR
=
20log_{⎜⎜⎝⎛}
VDD1 −
VIO1 −
VDD2
VIO2
⎟⎟⎠⎞
Figure 6
2. Input offset voltage
V_DD
−
V_IN
+
y Input offset voltage (V_IO)
The input offset voltage (V_IO) is defined as V_IN at which
V_OUT changes by changing V_IN.
V_OUT
V_CMR = V_DD/2
Figure 7
Seiko Instruments Inc.
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