AD8605 datasheet(5/20 Pages) AD

Part #	AD8605

Description	Precision Low noise CMOS Rail-to-Rail Input/Output Operational Amplifiers

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AD8605/AD8606/AD8608

Rev. D | Page 5 of 20

2.7 V ELECTRICAL SPECIFICATIONS

Table 2. @ VS = 2.7 V, VCM = VS/2, TA = 25°C, unless otherwise noted.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

INPUT CHARACTERISTICS

Offset Voltage

VOS

AD8605/AD8606

VS = 3.5 V, VCM = 3 V

20

65

µV

AD8608

VS = 3.5 V, VCM = 2.7 V

20

75

µV

VS = 2.7 V, VCM = 0 V to 2.7 V

80

300

µV

−40°C < TA < +125°C

750

µV

Input Bias Current

IB

0.2

1

pA

AD8605/AD8606

−40°C < TA < +85°C

50

pA

AD8605/AD8606

−40°C < TA < +125°C

250

pA

AD8608

−40°C < TA < +85°C

100

pA

AD8608

−40°C < TA < +125°C

300

pA

Input Offset Current

IOS

0.1

0.5

pA

−40°C < TA < +85°C

20

pA

−40°C < TA < +125°C

75

pA

Input Voltage Range

0

2.7

V

Common-Mode Rejection Ratio

CMRR

VCM = 0 V to 2.7 V

80

95

dB

−40°C < TA < +125°C

70

85

dB

Large Signal Voltage Gain

AVO

RL = 2 kΩ, VO= 0.5 V to 2.2 V

110

350

V/mV

Offset Voltage Drift

AD8605/AD8606

∆VOS/∆T

1

4.5

µV/°C

AD8608

∆VOS/∆T

1.5

6.0

µV/°C

INPUT CAPACITANCE

Common-Mode Input Capacitance

8.8

pF

Differential Input Capacitance

2.59

pF

OUTPUT CHARACTERISTICS

Output Voltage High

VOH

IL = 1 mA

2.6

2.66

V

−40°C < TA < +125°C

2.6

V

Output Voltage Low

VOL

IL = 1 mA

25

40

mV

−40°C < TA < +125°C

50

mV

Output Current

IOUT

±30

mA

Closed-Loop Output Impedance

ZOUT

f = 1 MHz, AV = 1

12

Ω

POWER SUPPLY

Power Supply Rejection Ratio

PSRR

AD8605/AD8606

VS = 2.7 V to 5.5 V

80

95

dB

AD8608

VS = 2.7 V to 5.5 V

77

92

dB

−40°C < TA < +125°C

70

90

dB

Supply Current/Amplifier

ISY

VO = 0 V

1.15

1.4

mA

−40°C < TA < +125°C

1.5

mA

DYNAMIC PERFORMANCE

Slew Rate

SR

RL = 2 kΩ

5

V/µs

Settling Time

tS

To 0.01%, 0 V to 1 V step

< 0.5

µs

Gain Bandwidth Product

GBP

9

MHz

Phase Margin

ϕO

50

Degrees

NOISE PERFORMANCE

Peak-to-Peak Noise

en p-p

f = 0.1 Hz to 10 Hz

2.3

3.5

µV p-p

Voltage Noise Density

en

f = 1 kHz

8

12

nV/√Hz

Voltage Noise Density

en

f = 10 kHz

6.5

nV/√Hz

Current Noise Density

in

f = 1 kHz

0.01

pA/√Hz

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