MCP3425A0T-E/CH

The MCP3425 is a single-channel, low-noise, high-accuracy, differential-input delta-sigma ADC in a compact SOT-23-6 package, with resolution up to 16 bits. The on-chip precision 2.048V reference provides a differential input voltage range of ±2.048V (ΔV = 4.096V). The device communicates via a 2-wire I²C-compatible serial interface and operates from a single 2.7V to 5.5V supply. Users configure the controllable configuration bits via the 2-wire I²C serial interface, allowing the MCP3425 to perform conversions at rates of 15, 60, or 240 samples per second (SPS). The device features an on-chip programmable gain amplifier (PGA) with selectable gains of x1, x2, x4, or x8 prior to analog-to-digital conversion, enabling the MCP3425 to convert smaller input signals at higher resolution. Two conversion modes are available: (a) continuous conversion mode and (b) one-shot conversion mode. In one-shot mode, the device automatically enters a low-current standby state after each conversion, significantly reducing current consumption during idle periods. The MCP3425 is suited for a wide range of high-accuracy analog-to-digital data conversion applications where simple design, low power consumption, and small form factor are required.

Applications

• Portable instrumentation
• Electronic scales and battery gauges
• Temperature sensing with RTDs, thermistors, and thermocouples
• Bridge measurements for pressure, strain, and force

Key features

• 16-bit AEADC in SOT-23-6 package
• Differential input operation
• Internal offset and gain self-calibration on every conversion
• On-chip reference voltage: 2.048V ±0.05% accuracy
• On-chip PGA: gain of 1, 2, 4, or 8
• On-chip oscillator
• INL: 10 ppm of FSR (FSR = 4.096V/PGA)
• Programmable data rate options: 15 SPS (16-bit), 60 SPS (14-bit), 240 SPS (12-bit)
• Single-shot or continuous conversion modes
• Low current consumption: 145 μA typical (VDD = 3V, continuous conversion)
• Single-shot conversion (1 SPS), VDD = 3V: 9.7 μA typical (16-bit mode), 2.4 μA typical (14-bit mode), 0.6 μA typical (12-bit mode)
• I²C serial interface: Standard, Fast, and High-Speed modes
• Single-supply operation: 2.7V to 5.5V
• Extended temperature range: -40°C to 125°C