ADC-20 & ADC-24 Specifications
| |
ADC-20 |
ADC-24 |
| Resolution |
20 bits |
24 bits |
| Number of channels[1] |
4 differential / 8 single-ended |
8 differential / 16 single-ended |
| Conversion time (per channel) |
660 ms, 340 ms, 180 ms, 100 ms, 60 ms |
| Voltage ranges |
±2500 mV
±1250 mV |
±2500 mV
±1250 mV
±625 mV
±312 mV
±156 mV
±78 mV
±39 mV |
| Gain error |
0.2% of reading |
0.1% (±39 mV to 1250 mV range)
0.2% (±2500 mV range) |
| Offset accuracy |
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) |
[1]The ADC-20 and ADC-24 have four and eight true differential input channels respectively. For flexibility each of these channels can be configured as either one differential channel or two single-ended channels.
| Noise-free resolution and conversion time |
| Conversion time per channel |
Voltage ranges & noise-free resolution (bits) for the full range of conversion times |
| |
±39 mV |
±78 mV |
±156 mV |
±313 mV |
±625 mV |
±1250 mV |
±2500 mV |
| |
ADC-24 only |
ADC-20 and ADC-24 |
| 660 ms |
17 |
18 |
19 |
20 |
20 |
20 |
20 |
| 340 ms |
17 |
18 |
19 |
19 |
19 |
20 |
20 |
| 180 ms |
16 |
17 |
18 |
19 |
19 |
19 |
19 |
| 100 ms |
16 |
17 |
18 |
18 |
18 |
19 |
19 |
| 60 ms |
15 |
16 |
17 |
18 |
18 |
18 |
18 |
| |
ADC-20 |
ADC-24 |
| Noise rejection |
120 dB typical at 50/60 Hz |
| Input impedance |
Differential: 2 MΩ
Single-ended: 1 MΩ |
| Common mode input range, channel to common |
±1.9 V (±39 mV to ±1250 mV ranges)
±3.0 V (±2500 mV range) |
| Common mode input range, common to earth ground |
±30 V |
| Common mode rejection ratio, channel to common |
95 dB (DC to 60 Hz) |
| Common mode rejection ratio, common to earth ground |
> 125 dB (DC to 60 Hz) |
| Overvoltage protection |
±30 V between any input and common |
| Digital I/O |
none |
4 bidirectional (3.3 V CMOS)
Output level, high: > 2.40 V
Output level, low: < 0.40 V
Input level, high: > 2.20 V
Input level, low: < 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
+5 V ±1.0 V @ 2 mA
–5 V ±1.5 V @ 2 mA |
| Software |
| PicoLog and PicoSDK |
Available from www.picotech.com/downloads |
| Example code |
Available from Pico's GitHub organization page, github.com/picotech |
| PicoLog user interface languages |
English, French, Italian, German, Spanish, Korean, Japanese, Chinese (simplified), Russian |
| PC requirements |
| Minimum |
Processor, Memory, Free disk space: As required by the operating system
Operating system: Microsoft Windows 7, 8 or 10, 32-bit and 64-bit versions; macOS 10.9 (Mavericks) or later, 64-bit only; Linux*, 64-bit only
Ports: USB 1.1 |
* PicoLog 6 for Linux is distributed as an AppImage, so you can install it without superuser permissions: see appimage.org for further information. The software has been tested on Red Hat, OpenSUSE and Ubuntu.
[2]PicoSDK 10.6.11 are the last versions compatible with Microsoft Windows XP (SP3) and Vista SP2, and they are also compatible with the Windows versions above.
| Environmental |
| Temperature range, operating, for quoted accuracy |
20 °C to 30 °C |
| Temperature range, operating |
0 °C to 45 °C |
| Temperature range, storage |
–20 to +60 °C |
| Humidity range, operating |
5 to 80 %RH, non-condensing |
| Humidity range, storage |
5 to 95 %RH, non-condensing |
| General |
| I/O connector |
25-way D female |
| Power requirements |
Powered from USB port, 100 mA (max.)
A 4.4 m (13.8 ft) USB cable is permanently attached to the logger |
| Dimensions |
135 x 184 x 36 mm (5.31 x 7.24 x 1.41 in) |
| Weight |
Approx. 505 g (17.8 oz) |
| Compliance |
European EMC and LVD standards
FCC Rules Part 15 Class A |
| Warranty |
5 years |
