USB2814 data acquisition card is a data acquisition card produced by Beijing Altai Technology Development Co., Ltd. It supports AD analog input, DA analog output, DI digital input, DO digital output and timer/counter 8254 function.
This manual describes the functional overview of the USB2814 data acquisition card, including analog input (AD), analog output (DA), digital I/O, and timer/counter features. It also details the hardware layout, physical ID management, and safety precautions.
Installation procedures, component wiring, calibration steps for AD and DA channels, and warranty information are provided. Technical specifications such as voltage ranges, resolution, sampling rates, and board dimensions are listed for reference. This manual is written in Chinese.
| AD converter model | AD7663ASTZ |
|---|---|
| AD resolution | 16 bit |
| Maximum AD sampling rate | 230 kHz total |
| Physical AD channels | 32 single‑ended, 16 differential |
| DA converter model | DAC7641 |
| DA resolution | 16 bit |
| DA update time | 10 µs |
| Digital input (DI) buffer | 74LS245, 8 channels, TTL compatible |
| Digital output (DO) driver | 74ALS273, TTL compatible, 20 mA pull‑down, 2.6 mA pull‑up |
| Timer/counter 8254 resolution | 16 bit |
It provides 32 single‑ended channels or 16 differential channels.
The total AD sampling rate is up to 230 kHz; per‑channel rate equals the total rate divided by the number of active channels.