S-89110ANC-1A1-TFZ Datasheet, PDF (13/34 Pages) Seiko Instruments Inc – MINI ANALOG SERIES

Rev.3.1_01
MINI ANALOG SERIES CMOS OPERATIONAL AMPLIFIER
S-89110/89120 Series
8. Voltage gain (open loop)
RF
VDD
RS
−
D.U.T
+
RS
RF
VDDN
+
NULL
−
VOUT
VCMR = VDD / 2
VM
VSSN
Figure 15
• Voltage-gain (open loop) (AVOL)
The voltage gain (AVOL) can be calculated by the following expression, with VOUT measured at each VM.
Test conditions:
When VM = VDD − 0.5 V: VM = VM1, VOUT = VOUT1,
When VM = VSS + 0.5 V: VM = VM2, VOUT = VOUT2
AVOL = 20 log
 VM1 − VM2
 ^{VOUT1 − VOUT2}
× ^RF_R⁺_S^RS_{}
9. Slew rate (SR)
Measured by the voltage follower circuit.
VCMR Max.
VIN(₊)
VSS
(= 0 V)
VOUT
(= VIN(_−))
tR = tF = 20 ns (VSS to VCMR Max.)
tTHL
tTLH
VCMR Max. × 0.9
VCMR Max. × 0.1
SR =
VCMR Max. × 0.8
tTLH
SR =
VCMR Max. × 0.8
tTHL
Figure 16
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