Microchip Technology Microchip Technology MCP3428 16ビットデルタシグマ型ADC
Microchip Technology MCP3428シリーズは、I²C™インターフェースおよびオンボードリファレンスを備えた低ノイズ、高精度、16ビットのデルタシグマ(ΔΣ)型アナログデジタルコンバータ(ADC)が特徴です。MCP3428 ADCは、4つの差動入力チャンネルを備えています。オンボード2.048Vリファレンス電圧によって、± 2.048Vの差動的な入力範囲(フルスケール範囲 =4.096/PGA)が有効になります。MCP3428 ADCは、毎秒15(16ビットモード)、60(14ビットモード)、あるいは240(12ビットモード)サンプルのレートで、アナログデジタル変換の結果を出力できます。このレートは、ユーザー制御が可能な構成ビット設定に基づいています。ユーザーは、2線式I²Cシリアルインターフェースでの設定を指定できます。各変換中に、MCP3428 ADCは、オフセットとゲイン誤差を自動的に較正します。これによりさまざまな温度や電源全体で、変換ごとに精密な変換結果を提供します。The onboard 2.048V reference voltage enables an input range of ±2.048V differentially (full-scale range =4.096/PGA). These devices can output analog-to-digital conversion results with rates of 15 (16-bit mode), 60 (14-bit mode), or 240 (12-bit mode) Samples per Second (SPS). The rate is based on the user-controllable configuration bit settings. Users can specify the settings with the two-wire I2C serial interface. During each conversion, these Analog-to-Digital Converters calibrate offset and gain errors automatically. This provides accurate conversion results from conversion to conversion over variations in temperature and power supply fluctuations.
The MCP3426 is available in 8-pin SOIC, DFN, and MSOP packages. The MCP3427 is available in 10-pin DFN and MSOP packages. The MCP3428 is available in 14-pin SOIC and TSSOP packages.
特徴
- 16-Bit Resolution with Differential Inputs
- 2 Channel MCP3426 and MCP3427
- 4 Channel MCP3428
- On-Board Voltage Reference (VREF)
- Accuracy 2.048V ± 0.05%
- Drift 15 ppm/°C
- On-Board Programmable Gain Amplifier (PGA) Gains of 1, 2, 4, 8
- Programmable Data Rate Options
- 15 SPS (16-Bits)
- 60 SPS (14-Bits)
- 240 SPS (12-Bits)
- 10ppm of Full-Scale Range (FSR)
- One-Shot or Continuous Conversion Options
- Typical Current Consumption (VDD = 3V)
- Continous Conversion 135µA
- One-Shot Conversion with 1 SPS
- 16-Bit Mode 9.0µA
- 14-Bit Mode 2.25µA
- 12-Bit Mode 0.56µA
- One-Shot or Continuous Conversion Options
- I2C Interface
- Standard (100kHz), Fast (400kHz), and High Speed (3.4MHz) Modes
- User Configurable Two External Address Selection Pins for MCP3427 and MCP3428
- Single Supply Operation 2.7V to 5.5V
- Extended Temperature Range -40°C to +125°C
アプリケーション
- Weigh Scales and Battery Fuel Gauges
- Portable Instrumentation
- Temperature Sensing with Resistance Temperature Detectors (RTDs), Thermistors, and Thermocouples
- Consumer Goods
- Bridge Sensing for Pressure, Strain, and Force
- Factory Automation Equipment
MCP3426 Block Diagram
MCP3427 Block Diagram
MCP3428 Block Diagram
Package Options
