S89430 datasheet(14/33 Pages) SII

Part #	S89430

Description	MINI ANALOG SERIES 0.5 uA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER

PDF	33 Pages

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Manufacturer	SII [Seiko Instruments Inc]

Direct Link	http://www.sii.co.jp

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MINI ANALOG SERIES 0.5

μA Rail-to-Rail CMOS OPERATIONAL AMPLIFIER

S-89430/89431 Series

Rev.2.1_01

9. Voltage gain (open loop)

−

VOUT

VDD / 2

VDD

−

VDDN

VSSN

NULL

D.U.T

VCMR = VDD / 2

Figure 16

• 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

− 0.1 V: VM = VM1, VOUT = VOUT1,

When VM = VSS

− 0.1 V: VM = VM2, VOUT = VOUT2

RL = 1 M

AVOL = 20 log













VM1

− VM2

VOUT1

− VOUT2 ×

+ RS

10. Slew rate (SR)

Measured by the voltage follower circuit.

VDD

VSS

(= 0 V)

tTHL

VDD

× 0.9

tR = tF = 1

μs (VSS to VDD)

tTLH

VDD

× 0.1

VIN(+)

VOUT

(= VIN(－))

At fall

SR =

VDD

× 0.8

tTHL

At rise

SR =

VDD

× 0.8

tTLH

Figure 17

S89430 Datasheet(PDF) 14 Page - Seiko Instruments Inc

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