Overview

The USB-XM2401 board is a high-precision card specifically designed for weak signal measurement. It utilizes Analog Devices' AD7714 chip, based on a Σ-Δ architecture, offering 24-bit no missing codes and a self-calibration function, eliminating the need for potentiometer calibration. This ADC device also features low noise and low power consumption. The card allows software configuration of the filter cutoff frequency and programmable gain (1-128x amplification) to enhance measurement accuracy. External analog signals are input via the 20-pin IDC connector (J1) on the board.

The USB-XM2401 provides 16 channels of digital input/output (DIO) with TTL levels. The 16 digital I/O signals are input/output via the 40-pin IDC connector (J2) on the board. Digital outputs feature an automatic power-on clear function, and CPU output data provides forward drive. Inputs can be configured via jumpers to be pulled high or low (factory default is pull-low) according to field requirements, facilitating user convenience.

The USB host controller chip of the USB-XM2401 card uses Cypress's CY68013. It features mature technology, powerful functions, a USB 2.0 bus, and supports hot-swapping and plug-and-play. It also utilizes large-scale Field-Programmable Gate Array (FPGA) design to enhance reliability.

Test programs, Dynamic Link Libraries (DLLs), and programming guides (DEMO programs) for Win7/8/10/XP are provided at the factory. Acquisition program examples for VB/VC/LABVIEW/C# are available, and a two-year warranty service is provided.

Performance Features

The ADC has 5 input channels, configurable as 3 differential inputs or 5 pseudo-differential inputs as needed.

Programmable gain (1-128x) is optional.

ADC features automatic hardware reset on power-up, and also supports software reset, which can be performed by calling a function when needed.

Σ-Δ architecture, capable of achieving 24-bit error-free output, while ensuring 0.0015% nonlinearity.

Selectable filter cutoff frequency (4.8Hz-1.01KHz).

Low power consumption, typical current value is 226μA (only 4μA in power-saving mode).

Low noise (<150 nV rms).

Serial three-wire (SPI) interface.

This card features self-calibration (including zero-scale and full-scale calibration).

Maximum analog signal input (1x gain): Unipolar: 0-2.5V, Bipolar: -2.5V-2.5V (default). (Note: If programmable gain amplification is used, the amplified signal must not exceed the range. Range: Unipolar 0-2.5/(2^gain)V, Bipolar -2.5/(2^gain)V to 2.5/(2^gain)V).

High-precision reference power supply AD780.

FPGA-controlled digital circuits to enhance reliability.

16 digital inputs, 16 digital outputs, TTL level.

Digital inputs can be selected to be pulled high or low via jumper JP1.

Digital outputs feature an automatic power-on clear function, and each output signal has a latch function.

Power management chip, automatically determines whether to use external power supply or USB bus power supply.

External power supply features reverse connection protection design.

Provides drivers and dynamic link libraries for WIN7/8/10/XP.

Dimensions: 12(W) X 10(L) X 2.7(H) (cm).

Operating current: <350mA.

^ symbol represents power (exponent).

Board Appearance Diagram:

Technical Parameters

Operating Voltage: 5V±0.25V

Operating Temperature: 0℃～50℃

Humidity: 5%～95%