PICO ADC-20 高分辨率数据记录器 (20 bit; 4/8 CH)

Inputs and outputs

Resolution: 20 bits

Number of channels: 4 differential / 8 single-ended (Each differential channel can optionally be configured as two single-ended channels)

Conversion time per channel: 660 ms, 340 ms, 180 ms, 100 ms, 60 ms

Voltage ranges: ±2500 mV; ±1250 mV;

Gain error: 0.2% of reading

Offset accuracy:

400 µV (±2500 mV range);

36 µV (±1250 mV range);

Offsets typical with input source impedance ≤ 1 kΩ

Noise-free resolution: See datasheet

Noise rejection: 120 dB typical at 50/60 Hz

Input impedance: Differential: 2 MΩ; Single-ended: 1 MΩ

ADC input bias current: 50 nA max.

Common mode input range, channel to common:  ±3.0 V (±2500 mV range); ±1.9 V (±39 mV to ±1250 mV ranges)

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

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


Temperature range, operating, for quoted accuracy: 20 to 30 °C

Temperature range, operating: 0 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


Software: PicoLog Cloud, 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 (PicoLog Cloud app): Windows, macOS, Linux or Raspberry Pi OS. For supported OS versions, see PicoLog 6 Release Notes. Hardware as required by the operating system.

PC requirements (viewer): Any device with internet access, a web browser and a screen

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



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