AD820

Rev. H | Page 3 of 24

SPECIFICATIONS

VS = 0 V, 5 V @ TA = 25°C, VCM = 0 V, VOUT = 0.2 V, unless otherwise noted.

Table 1.

AD820A

AD820B

Parameter

Conditions

Min

Typ

Max

Min

Typ

Max

Unit

DC PERFORMANCE

Initial Offset

0.1

0.8

0.1

0.4

mV

Maximum Offset over Temperature

0.5

1.2

0.5

0.9

mV

Offset Drift

2

2

μV/°C

Input Bias Current

V

CM = 0 V to 4 V

2

25

2

10

pA

At T

MAX

0.5

5

0.5

2.5

nA

Input Offset Current

2

20

2

10

pA

At T

MAX

0.5

0.5

nA

Open-Loop Gain

V

OUT = 0.2 V to 4 V

R

L = 100 kΩ

400

1000

500

1000

V/mV

T

MIN to TMAX

400

400

V/mV

R

L = 10 kΩ

80

150

80

150

V/mV

T

MIN to TMAX

80

80

V/mV

R

L = 1 kΩ

15

30

15

30

V/mV

T

MIN to TMAX

10

10

V/mV

NOISE/HARMONIC PERFORMANCE

Input Voltage Noise

f = 0.1 Hz to 10 Hz

2

2

μV p-p

f = 10 Hz

25

25

nV/√Hz

f = 100 Hz

21

21

nV/√Hz

f = 1 kHz

16

16

nV/√Hz

f = 10 kHz

13

13

nV/√Hz

Input Current Noise

f = 0.1 Hz to 10 Hz

18

18

fA p-p

f = 1 kHz

0.8

0.8

fA/√Hz

Harmonic Distortion

R

L = 10 kΩ to 2.5 V

f = 10 kHz

V

OUT = 0.25 V to 4.75 V

−93

−93

dB

DYNAMIC PERFORMANCE

Unity Gain Frequency

1.8

1.8

MHz

Full Power Response

V

OUT p-p = 4.5 V

210

210

kHz

Slew Rate

3

3

V/μs

Settling Time

V

OUT = 0.2 V to 4.5 V

To 0.1%

1.4

1.4

μs

To 0.01%

1.8

1.8

μs

INPUT CHARACTERISTICS

Common-Mode Voltage Range1

T

MIN to TMAX

−0.2

+4

–0.2

+4

V

CMRR

V

CM = 0 V to 2 V

66

80

72

80

dB

T

MIN to TMAX

66

66

dB

Input Impedance

Differential

1013||0.5

1013||0.5

Ω||pF

Common Mode

1013||2.8

1013||2.8

Ω||pF