Overview
The AD7172-4BCPZ-RL is a low noise, low power, multiplexed, Σ-Δ (Sigma-Delta) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for applications requiring high precision and flexibility in converting low bandwidth signals. It features 4 or 8 input channels, which can be configured as fully differential or single-ended channels, making it versatile for various measurement tasks.
The AD7172-4 integrates key analog and digital signal conditioning blocks, allowing users to configure individual setups for each analog input channel via an SPI interface. The device includes true rail-to-rail analog and reference input buffers, facilitating the drive of high impedance inputs.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 24 |
| Number of Input Channels | 4 (fully differential) or 8 (single-ended) |
| Sampling Rate | 1.25 SPS to 31.25 kSPS |
| Channel Scan Rate | 6.21 kSPS (161 μs settling) |
| Supply Voltage (AVDD1) | 3.0 V to 5.5 V |
| Supply Voltage (AVDD2, IOVDD) | 2 V to 5.5 V |
| Operating Temperature | -40°C to +105°C |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 0.75mm) |
| Interface | SPI, QSPI, MICROWIRE, DSP compatible |
| Noise Free Bits | 17.2 at 31.25 kSPS, 24 at 5 SPS |
| Integral Nonlinearity (INL) | ±2 ppm of FSR |
| 50 Hz and 60 Hz Rejection | 85 dB with 50 ms settling |
Key Features
- Low noise and low power consumption, making it suitable for battery-powered devices.
- True rail-to-rail analog and reference input buffers for easy driving of high impedance inputs.
- User-configurable input channels and digital filter options for flexibility in various applications.
- Simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate.
- Offset and gain calibration registers configurable on a per channel basis.
- General-purpose input/outputs (GPIOs) to control external multiplexers synchronous to the ADC conversion timing.
- SPI, QSPI, MICROWIRE, and DSP-compatible serial interface.
Applications
- Process control: PLC/DCS modules.
- Temperature and pressure measurement.
- Medical and scientific multichannel instrumentation.
- Chromatography.
Q & A
- What is the maximum sampling rate of the AD7172-4BCPZ-RL?
The maximum sampling rate is 31.25 kSPS.
- How many input channels does the AD7172-4BCPZ-RL support?
The device supports 4 fully differential or 8 single-ended input channels.
- What is the operating temperature range of the AD7172-4BCPZ-RL?
The operating temperature range is -40°C to +105°C.
- What type of package does the AD7172-4BCPZ-RL come in?
The device is packaged in a 32-Lead LFCSP (5mm x 5mm x 0.75mm).
- Does the AD7172-4BCPZ-RL support simultaneous 50 Hz and 60 Hz rejection?
- What is the power consumption of the AD7172-4BCPZ-RL?
The device consumes approximately 1.5 mA of current.
- Can the AD7172-4BCPZ-RL be used in medical applications?
- What type of digital interface does the AD7172-4BCPZ-RL use?
The device uses an SPI, QSPI, MICROWIRE, and DSP-compatible serial interface.
- Does the AD7172-4BCPZ-RL have built-in calibration registers?
- Can the AD7172-4BCPZ-RL control external multiplexers?
