Overview
The MCP3421A0T-E/CH is a high-accuracy, low-noise 18-bit Delta-Sigma Analog-to-Digital Converter (ADC) produced by Microchip Technology. This device is designed to convert analog signals into digital data and is particularly suited for applications requiring high precision and reliability. The MCP3421A0T-E/CH features a compact SOT-23-6 package, making it ideal for space-constrained designs. It operates on a single supply voltage ranging from 2.7V to 5.5V and supports both single-ended and differential input signals.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Input Type | Single-ended and Differential |
| Input Voltage Range | ±2.048 V (differential: 4.096 V) |
| Conversion Rates | 3.75 SPS (18 bits), 15 SPS (16 bits), 60 SPS (14 bits), 240 SPS (12 bits) |
| Digital Interface | Serial (2-wire, I2C), Standard, Fast, and High Speed Modes |
| Operating Temperature Range | -40°C to 85°C (typical), -55°C to 125°C (ambient with power applied) |
| Supply Voltage | 2.7V to 5.5V |
| Current Consumption | 145 µA (typical, continuous conversion), 39 µA (typical, one-shot conversion with 1 SPS) |
| Package Type | SOT-23-6 |
| On-board Components | On-board Voltage Reference, Programmable Gain Amplifier (PGA), On-board Oscillator |
Key Features
- High accuracy with 18-bit resolution and internal offset and gain self-calibration per each conversion.
- On-board precision 2.048V reference voltage with an accuracy of ±0.05% and a drift of 15 ppm/°C.
- Programmable Gain Amplifier (PGA) with gains of 1, 2, 4, or 8.
- On-board oscillator and support for one-shot or continuous conversion modes.
- Low current consumption, especially in one-shot conversion mode, making it suitable for low power applications.
- I2C serial interface with standard, fast, and high speed modes.
- Extended temperature range operation and automotive AEC-Q100 compliance.
Applications
- Portable Instrumentation
- Weigh Scales and Fuel Gauges
- Temperature Sensing with RTD, Thermistor, and Thermocouple
- Bridge Sensing for Pressure, Strain, and Force
Q & A
- What is the resolution of the MCP3421A0T-E/CH ADC?
The MCP3421A0T-E/CH has a resolution of 18 bits.
- What are the input voltage ranges for the MCP3421A0T-E/CH?
The input voltage range is ±2.048 V for differential inputs and 4.096 V for single-ended inputs.
- What are the conversion rates available for the MCP3421A0T-E/CH?
The conversion rates are 3.75 SPS (18 bits), 15 SPS (16 bits), 60 SPS (14 bits), and 240 SPS (12 bits).
- What type of digital interface does the MCP3421A0T-E/CH use?
The device uses a serial (2-wire, I2C) interface with standard, fast, and high speed modes.
- What is the operating temperature range of the MCP3421A0T-E/CH?
The operating temperature range is -40°C to 85°C (typical), and -55°C to 125°C (ambient with power applied).
- What is the power supply voltage range for the MCP3421A0T-E/CH?
The supply voltage range is 2.7V to 5.5V.
- What are the current consumption characteristics of the MCP3421A0T-E/CH?
The device consumes 145 µA (typical) in continuous conversion mode and 39 µA (typical) in one-shot conversion mode with 1 SPS.
- What package type is the MCP3421A0T-E/CH available in?
The device is available in a SOT-23-6 package.
- Does the MCP3421A0T-E/CH have on-board components like a voltage reference and PGA?
Yes, it includes an on-board precision 2.048V reference voltage and a programmable gain amplifier (PGA).
- What are some typical applications of the MCP3421A0T-E/CH?
Typical applications include portable instrumentation, weigh scales, fuel gauges, temperature sensing, and bridge sensing for pressure, strain, and force.
