|
ADC-20 |
ADC-24 |
Input channels
Differential
Single-ended |
Configurable up to 4
Configurable up to 8 |
Configurable up to 8
Configurable up to 16 |
Conversion time per channel |
60 ms, 100 ms, 180 ms, 340 ms, 660 ms |
Input voltage ranges |
2 ranges
±1250 mV and ±2500 mV |
7 ranges
±39 mV to ±2500 mV |
Resolution |
20 bits |
24 bits |
Noise-free resolution |
See table below |
Overvoltage protection |
±30 V between any input and common |
Common-mode range
Channel to common
Channel to common
Common to earth ground |
±1.9 V (±39 mV to ±1250 mV ranges)
±3.0 V (±2500 mV range)
±30 V |
Noise rejection |
120 dB typical at 50 to 60 Hz |
Input impedance |
2 MΩ (differential), 1 MΩ (single-ended) |
Gain error from source impedance |
0.5 ppm per ohm source impedance due to input impedance |
Gain error |
0.2% |
0.1%
(0.2% at ±2500 mV) |
Offset error |
6 µV (±39 mV range)
7 µV (±78 mV range)
9 µV (±156 mV range)
13 µV (±313 mV range)
20 µV (±625 mV range)
36 µV (±1250 mV range)
400 µV (±2500 mV range) |
Digital I/O |
None |
4 |
Output level, high
Output level, low
Input level, high
Input level, low |
|
> 2.40 V
< 0.40 V
> 2.20 V
< 0.88 V |
Isolation (input to input) |
None |
Isolation (input to ground) |
Galvanic, up to ±30 V
AGND and DGND isolated |
Reference output |
+2.5 V ±2.5 mV @ 2 mA |
Power outputs |
+5 V ±1.0 V @ 2 mA
-5 V ±1.5 V @ 2 mA |
Environmental conditions
Operating temperature
Quoted input accuracy
Storage temperature
Operating humidity
Storage humidity |
0 ºC to 45 ºC
20 ºC to 30 ºC
-20 ºC to 60 ºC
5% to 80% RH, non-condensing
5% to 95% RH, non-condensing |
Recommended calibration interval |
1 year |
PC connection |
USB 1.1 (USB 2.0 compatible)
Cable length approx. 4.4 m (13.8 ft) |
Input connector |
DB25 female |
Power supply |
100 mA (max.) from USB port |
Dimensions |
13.5 cm x 18.4 cm x 3.6 cm
(5.31 in x 7.24 in x 1.41 in) |
Weight |
Approx. 505 g (17.8 oz) |