Datasheet

AD820
–3–
REV. A
(V
S
= +5 volts (@ T
A
= +258C, V
CM
= 0 V, V
OUT
= 0 V unless otherwise noted)
AD820A AD820B
Parameter Conditions Min Typ Max Min Typ Max Units
DC PERFORMANCE
Initial Offset 0.1 0.8 0.3 0.4 mV
Max Offset over Temperature 0.5 1.5 0.5 1 mV
Offset Drift 2 2 µV/°C
Input Bias Current V
CM
= –5 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
O
= 4 V to –4 V
R
L
= 100k 400 1000 400 1000 V/mV
T
MIN
to T
MAX
400 400 V/mV
R
L
= 10k 80 150 80 150 V/mV
T
MIN
to T
MAX
80 80 V/mV
R
L
= 1k 20 30 20 30 V/mV
T
MIN
to T
MAX
10 10 V/mV
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
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
0.1 Hz to 10 Hz 18 18 fA p-p
f = 1 kHz 0.8 0.8 fA/√
Hz
Harmonic Distortion R
L
= 10k
f = 10 kHz V
O
= ±4.5 V –93 –93 dB
DYNAMIC PERFORMANCE
Unity Gain Frequency 1.9 1.8 MHz
Full Power Response V
O
p-p = 9 V 105 105 kHz
Slew Rate 3 3 V/µs
Settling Time
to 0.1% V
O
= 0 V to ±4.5 V 1.4 1.4 µs
to 0.01% 1.8 1.8 µs
INPUT CHARACTERISTICS
Common-Mode Voltage Range
1
–5.2 4 –5.2 4 V
T
MIN
to T
MAX
–5.2 4 –5.2 4 V
CMRR V
CM
= –5 V to +2 V 66 80 72 80 dB
T
MIN
to T
MAX
66 66 dB
Input Impedance
Differential 10
13
i0.5 10
13
i0.5 ΩipF
Common Mode 10
13
i2.8 10
13
i2.8 ΩipF
OUTPUT CHARACTERISTICS
Output Saturation Voltage
2
V
OL
–V
EE
I
SINK
= 20 µA 5 7 57mV
T
MIN
to T
MAX
10 10 mV
V
CC
–V
OH
I
SOURCE
= 20 µA 10 14 1014mV
T
MIN
to T
MAX
20 20 mV
V
OL
–V
EE
I
SINK
= 2 mA 40 55 40 55 mV
T
MIN
to T
MAX
80 80 mV
V
CC
–V
OH
I
SOURCE
= 2 mA 80 110 80 110 mV
T
MIN
to T
MAX
160 160 mV
V
OL
–V
EE
I
SINK
= 15 mA 300 500 300 500 mV
T
MIN
to T
MAX
1000 1000 mV
V
CC
–V
OH
I
SOURCE
= 15 mA 800 1500 800 1500 mV
T
MIN
to T
MAX
1900 1900 mV
Operating Output Current 15 15 mA
T
MIN
to T
MAX
12 12 mA
Short Circuit Current 30 30 mA
Capacitive Load Drive 350 350 pF
POWER SUPPLY
Quiescent Current T
MIN
to T
MAX
650 800 620 800 µA
Power Supply Rejection V
S
+ = 5 V to 15 V 70 80 70 80 dB
T
MIN
to T
MAX
70 70 dB