S-89430A Datasheet, PDF (9/23 Pages) Seiko Instruments Inc – MINI ANALOG SERIES 0.5 μA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER

MINI ANALOG SERIES 0.5 µA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER
Rev.5.1_00
S-89430A/89431A
3. Common-mode input signal rejection ratio, common-mode input voltage range
V_DD
R_F
y Common-mode input signal rejection ratio (CMRR)
The common-mode input signal rejection ratio
(CMRR) can be calculated by the following
expression, with V_OUT measured at each V_IN.
R_S
R_S
V_IN
−
+
R_F
V_DD / 2
V_OUT
Measurement conditions:
When V_IN = V_CMR (max.): V_IN = V_IN1, V_OUT = V_OUT1
When V_IN = V_CMR (min.): V_IN = V_IN2, V_OUT = V_OUT2
CMRR = 20log
V_IN1 − V_IN2
V_OUT1 − V_OUT2
× ^{RF + RS}
R_S
y Common-mode input voltage range (V_CMR)
The common-mode input voltage range is the range
of V_IN in which V_OUT satisfies the common-mode input
signal rejection ratio specifications.
Figure 9
4. Maximum output swing voltage
V_DD
−
V_OH
+
R_L
y Maximum output swing voltage (V_OH)
Measurement conditions:
VIN1 = ^VDD − 0.1 V
2
VIN2 = ^VDD + 0.1V
2
R_L ⁼ 100 KΩ
V_IN1
V_IN2
V_DD/2
Figure 10
V_DD V_DD/2
R_L
−
V_OL
+
y Maximum output swing voltage (V_OL)
Measurement conditions:
VIN1 = ^VDD + 0.1 V
2
VIN2 = ^VDD − 0.1 V
2
R_L = 100 KΩ
V_IN1
V_IN2
Figure 11
Seiko Instruments Inc.
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