Analog Devices Inc. AD7173-8 低功耗 Σ-Δ 模数转换器
Analog Devices AD7173-8 低功耗 Σ-Δ 模数转换器为快速建立时间、高精度、8/16 通道、多路复用模数转换器，设计用于带有集成输入缓冲器的低带宽输入信号。 AD7173-8 模数转换器具有集成精度、2.5V、3.5ppm/°C 低漂移、带隙基准和集成振荡器。 该设计还包括集成的诊断功能，如 CRC、温度传感器、寄存器校验、熔断电流、交叉点多路复用器和 GPIO/GPO。 设计人员可以选择 AD7173-8 模数转换器的 8 个不同设置。 可通过输出数据速率、缓冲器、数字滤波器模式、偏移/增益误差校正和基准选择等选项来配置这些设置。 该模数转换器的 Sinc5 + sinc1 滤波器最大限度地提高通道扫描速率。 AD7173-8 的 sinc3 滤波器最大限度地提高分辨率，增强 50Hz/60Hz 抑制。 这些模数转换器包含四个可选择的选项以便最大限度地提高抑制。
特性
- Low power, 8-/16-channel, highly integrated multiplexed analog-to-digital converter (ADC)
- Integration
- Precision analog input buffers and reference input buffers
- 2.5V precision reference (3.5ppm/°C)
- Crosspoint multiplexer(enable system diagnostic)
- 8 full differential or 16 single-ended channels
- Clock oscillator
- GPIO and GPO pins with automatic external mux control
- 1.25SPS to 31.25kSPS output rate
- 6.21kSPS/channel (161μs settling) channel scan data rate
- -40°C to +105°C temperature range
- 40-lead 6mm × 6mm LFCSP package
- 1.4mA current rating
- Performance specifications
- 17.5 noise-free bits at 31.25kSPS
- 24 noise-free bits at 1.25SPS
- INL: ±3ppm/FSR
- 85dB rejection of 50Hz and 60Hz with 50ms settling
- Operates with either 3.3V or 5V supply
- Single supply
- 3.3V or 5V AVDD1, 2V to 5V AVDD2, and 2V to 5V IOVDD
- Optional split supply
- AVDD1 and AVSS ±2.5V or AVDD1 and AVSS ±1.65V
- Single supply
- 3-/4-wire serial digital interface (Schmitt trigger on SCLK)
- CRC error checking
- SPI, QSPI, MICROWIRE, and DSP compatible
应用
- Process Control
- PLC/DCS modules
- Voltage, current, temperature, and pressure measurement
- Flow meters
- Medical and scientific multi-channel instrumentation
- Seismic instrumentation
- Chemical Analysis Instrumentation
- chromatography
Functional Block Diagram
Development Tools
发布日期: 2017-01-16
| 更新日期: 2022-03-11