Datasheet

REV. A
–2–
AD781–SPECIFICATIONS
DC SPECIFICATIONS
AD781J AD781A AD781S
Parameter Min Typ Max Min Typ Max Min Typ Max Units
SAMPLING CHARACTERISTICS
Acquisition Time
10 V Step to 0.01% 600 700 600 700 600 700 ns
10 V Step to 0.1% 500 600 500 600 500 600 ns
Small Signal Bandwidth 4 4 4 MHz
Full Power Bandwidth 1 1 1 MHz
HOLD CHARACTERISTICS
Effective Aperture Delay (25°C) –35 –25 –15 –35 –25 –15 –35 –25 –15 ns
Aperture Jitter (25°C) 50 75 50 75 50 75 ps
Hold Settling (to 1 mV, 25°C) 250 500 250 500 250 500 ns
Droop Rate 0.01 1 0.01 1 0.01 1 µV/µs
Feedthrough (25°C)
(V
IN
= ±5 V, 100 kHz) –86 –86 –86 dB
ACCURACY CHARACTERISTICS
1
Hold Mode Offset –4 –1 +3 –4 –1 +3 –4 –1 +3 mV
Hold Mode Offset Drift 10 10 10 µV/°C
Sample Mode Offset 50 200 50 200 50 200 mV
Nonlinearity ±0.002 ±0.003 ±0.002 ±0.003 ±0.003 ±0.005 % FS
Gain Error ±0.01 ± 0.025 ±0.01 ± 0.025 ±0.01 ± 0.025 % FS
OUTPUT CHARACTERISTICS
Output Drive Current –5 +5 –5 +5 –5 +5 mA
Output Resistance, DC 0.3 0.5 0.3 0.5 0.3 0.5 Ω
Total Output Noise (DC to 5 MHz) 150 150 150 µV rms
Sampled DC Uncertainty 85 85 85 µV rms
Hold Mode Noise (DC to 5 MHz) 125 125 125 µV rms
Short Circuit Current
Source 20 20 20 mA
Sink 10 10 10 mA
INPUT CHARACTERISTICS
Input Voltage Range –5 +5 –5 +5 –5 +5 V
Bias Current 50 250 50 250 50 250 nA
Input Impedance 50 50 50 MΩ
Input Capacitance 2 2 2 pF
DIGITAL CHARACTERISTICS
Input Voltage Low 0.8 0.8 0.8 V
Input Voltage High 2.0 2.0 2.0 V
Input Current High (V
IN
= 5 V) 2 10 2 10 2 10 µA
POWER SUPPLY CHARACTERISTICS
Operating Voltage Range ±10.8 ±12 ±13.2 ±10.8 ±12 ±13.2 ±10.8 ±12 ±13.2 V
Supply Current 4 6.5 4 6.5 4 7 mA
+PSRR (+12 V ± 10%) 70 80 70 80 70 80 dB
–PSRR (–12 V ± 10%) 65 75 65 75 65 75 dB
Power Consumption 95 175 95 175 95 185 mW
TEMPERATURE RANGE
Specified Performance 0 +70 –40 +85 –55 +125 °C
NOTE
1
Specified and tested over an input range of ±5 V.
Specifications subject to change without notice.
Specifications shown in boldface are tested on all devices at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max
specifications are guaranteed although only those shown in boldface are tested.
(T
MIN
to T
MAX
, V
CC
= +12 V 6 10%, V
EE
= –12 V 6 10%, C
L
= 20 pF, unless otherwise noted)