MCP3421A1T-E/CH
Data Converters (ADC/DAC)
Technical Specifications
| Type | Description |
|---|---|
| Quiescent Current (Iq) | 145uA |
| Integral Non - Linearity | 10LSB |
| Voltage Reference | Built-in |
| Clock/Oscillator | Built-in |
| Resolution(Bits) | 3.75Hz;18 |
| S/N Ratio | - |
| DNL (LSB) | - |
| ADC Architecture | Sigma-Delta |
| Type | Description |
|---|---|
| Programmable Gain | Support |
| Operating Temperature | -40°C~+125°C |
| Interface | I2C |
| Supply Voltage | 2.7V~5.5V |
| Channels | 1 |
| Maximum Clock Speed | - |
| Features | Power-on reset |
| Package / Case | SOT-23-6 |
Product Introduction
MCP3421 is a single-channel, low-noise, high-precision, differential-input A/D converter with resolution up to 18 bits, available in a compact SOT-23-6 package. The on-chip precision 2.048V reference enables a differential input voltage range of ±2.048V (ΔV = 4.096V). The device uses a 2-wire I2C-compatible serial interface and operates from a single 2.7V to 5.5V supply.
Users configure the control bits via the 2-wire I²C serial interface, allowing the MCP3421 to perform conversions at rates of 3.75, 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 conversion, enabling the MCP3421 to maintain high resolution when converting small input signals. Two conversion modes are available: a) Continuous Conversion mode; b) One-Shot Conversion mode. In One-Shot mode, the device automatically enters a low-current standby state upon completion of a conversion, significantly reducing current consumption during idle periods.
The MCP3421 is well-suited for a wide range of high-precision A/D conversion applications requiring simple design, low power consumption, and space savings.
Features
- 18-bit ΔΣ ADC in SOT-23-6 package
- Differential inputs
- Self-calibration of internal offset and gain on each conversion
- On-chip reference voltage: accuracy: 2.048V ± 0.05%; drift: 15 ppm/°C
- On-chip PGA: gains of 1, 2, 4, or 8
- On-chip oscillator
- INL: 10 ppm of FSR (FSR = 4.096V / PGA)
- Programmable data rate options: 3.75 SPS (18-bit); 15 SPS (16-bit); 60 SPS (14-bit); 240 SPS (12-bit)
- Single-shot or continuous conversion modes
- Low current consumption: 145μA (typical) (VDD = 3V, continuous conversion); 39μA (typical) (VDD = 3V, single-shot, 1 SPS)
- 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
Applications
- Portable instrumentation
- Electronic scales and battery gauges
- Temperature measurement with RTDs, thermistors, and thermocouples
- Bridge-based pressure, tension, and strain measurement
Datasheet
Alternative Parts
Common MCP3421A1T-E/CH alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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