Datasheet

AD648–SPECIFICATIONS
(@ + 25ⴗC and V
S
= ⴞ15 V dc, unless otherwise noted.)
–2–
REV. E
AD648J/A/S AD648K/B/T
Model Min Typ Max Min Typ Max Unit
INPUT OFFSET VOLTAGE
1
Initial Offset 0.75 2.0 0.3 1.0
T
MIN
to T
MAX
3.0/3.0/3.0 1.5/1.5/2.0 mV
vs. Temperature 20 10 µV/°C
vs. Supply 80 86 dB
vs. Supply, T
MIN
to T
MAX
76/76/76 80 dB
Long-Term Offset Stability 15 15 µV/month
INPUT BIAS CURREN
Either Input,
2
V
CM
= 0 5 20 3 10 pA
Either Input
2
at T
MAX
, V
CM
= 0 0.45/1.3/20 0.25/0.65/10 nA
Max Input Bias Current Over
Common-Mode Voltage Range 30 15 pA
Offset Current, V
CM
= 0 5 10 2 5 pA
Offset Current at T
MAX
0.25/0.7/10 0.15/0.35/5 nA
MATCHING CHARACTERISTICS
3
Input Offset Voltage 1.0 2.0 0.5 1.0 mV
Input Offset Voltage T
MIN
to T
MAX
3.0/3.0/3.0 1.5/1.5/2.0 mV
Input Offset Voltage vs. Temperature 8 5 µV/°C
Input Bias Current 10 5 pA
Crosstalk –120 –120 dB
INPUT IMPEDANCE
Differential 1 × 10
1 2
储3 1 × 10
12
储3 Ω储pF
Common Mode 3 × 10
12
储3 3 × 10
12
储3 Ω储pF
INPUT VOLTAGE RANGE
Differential
4
±20 ±20 V
Common Mode ±11 ±12 ±11 ±12 V
Common-Mode Rejection
V
CM
= ±10 V 76 82 dB
T
MIN
to T
MAX
76/76/76 82 dB
V
CM
= ±11 V 70 76 dB
T
MIN
to T
MAX
70/70/70 76 dB
INPUT VOLTAGE NOISE
Voltage 0.1 Hz to 10 Hz 2 2 µV p-p
f = 10 Hz 80 80 nV/√Hz
f = 100 Hz 40 40 nV/√Hz
f = 1 kHz 30 30 nV/√Hz
f = 10 kHz 30 30 nV/√Hz
INPUT CURRENT NOISE
f = 1 kHz 1.8 1.8 fA/√Hz
FREQUENCY RESPONSE
Unity Gain, Small Signal 0.8 1.0 0.8 1.0 MHz
Full Power Response 30 30 kHz
Slew Rate, Unity Gain 1.0 1.8 1.0 1.8 V/µs
Settling Time to ±0.01% 8 8 µs
OPEN-LOOP GAIN
V
O
= ±10 V, R
L
≥ 10 kΩ 300 1000 300 1000 V/mV
T
MIN
to T
MAX
, R
L
≥ 10 kΩ 300/300/300 700 300 700 V/mV
V
O
= ±10 V, R
L
≥ 5 kΩ 150 500 150 500 V/mV
T
MIN
to T
MAX
, R
L
≥ 5 kΩ 150/150/150 300 150 300 V/mV