S89530A Datasheet, PDF (7/16 Pages) Seiko Instruments Inc – MINI ANALOG SERIES 0.7 uA Rail-to-Rail CMOS COMPARATOR

Rev.4.1_01
MINI ANALOG SERIES 0.7 μA Rail-to-Rail CMOS COMPARATOR
S-89530A/89531A Series
 Measurement Circuits
1. Power supply voltage rejection ratio
V_DD
−
+
VIN
0.45 V
VOUT
 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 − VDD2
VIO1 − VIO2

Figure 6
2. Input offset voltage
V_DD
−
V_IN
+
 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
7