S-89120A SII [Seiko Instruments Inc], S-89120A Datasheet - Page 7

• Manufacturer Part Number: S-89120A
• Description: MINI ANALOG SERIES CMOS OPERATIONAL AMPLIFIER
• Manufacturer: SII [Seiko Instruments Inc]

Rev.2.2
Measurement Circuit
1. Power supply voltage rejection ratio, input offset voltage
2. Common-mode input signal rejection ratio, common-mode input voltage range
V
V
IN
CMR
_00
R
R
R
R
S
S
S
S
=V
DD
/ 2
R
R
V
R
R
F
F
DD
F
F
Figure 6
Figure 7
/ 2
−
+
−
+
V
V
DD
DD
MINI ANALOG SERIES CMOS OPERATIONAL AMPLIFIER
V
V
OUT
OUT
Seiko Instruments Inc.
Power supply voltage rejection ratio (PSRR)
Measurement conditions:
PSRR = 20 log
Input offset voltage (V
Common-mode input signal rejection ratio (CMRR)
Measurement conditions:
Common-mode input voltage range (V
V
The power supply voltage rejection ratio (PSRR) can
be calculated by the following expression, with V
measured at each V
When V
When V
The common-mode input signal rejection ratio
(CMRR)
expression, with V
When V
When V
CMRR = 20 log
The common-mode input voltage range is the range
of V
signal rejection ratio specifications.
IO
=
IN



V
in which V
OUT
DD
DD
IN
IN
= V
= V
−
= 1.8 V: V
= 5.0 V: V
can
V
2
CMR
DD
DD
V
/2: V
OUT1

× 

OUT
be
(max.): V
OUT
V
R
−
IO
OUT1
V
DD
IN
DD
DD
satisfies the common-mode input
F
V
)
IN1
V
R
+
calculated
measured at each V
.
= V
DD1
DD1
2
s
= V
= V
R
− V
− V
S
− V
IN2
IN
DD1
DD2
IN2
OUT2
−
, V
= V
DD2
, V
, V
V
OUT
S-89110A/89120A
OUT2
IN1
OUT
OUT
×
, V
= V
−
by
= V
= V
V
R
OUT
DD2
2
OUT2
F
CMR
R
OUT1
OUT2
the
+ R
S
= V
)
IN
×
S
.
OUT1
R
following
F
R
+ R
S
S
OUT
7