Microchip Technology Microchip Technology MCP3428 16 位 Δ-Σ 模数转换器
Microchip Technology MCP3428 系列产品为低噪声、高精度、16 位、Δ-Σ 模数转换器，具有 I²C 接口和板载基准。MCP3428 模数转换器具有四路差分输入通道。板载 2.048V 基准电压能够实现 ±2.048V 的差分输入范围（满量程范围=4.096/ PGA）。MCP3428 模数转换器可以输出模数转换结果，每秒采样率为 15（16 位模式）、60（14 位模式）或 240（12 位模式）。采样率基于用户可控制的配置位设置。用户可以指定两线 I²C 串行接口的设置。在每次转换过程中，MCP3428 模数转换器均自动校准偏移和增益误差。可在温度和电源波动的变化中提供每次转换的精确转换结果。
The on-board 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.
特性
- 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
