Overview
The AD7172-4BCPZ is a low noise, low power, multiplexed, Sigma-Delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for low bandwidth signals and offers a high degree of flexibility and precision. It features 4- or 8-channel inputs, which can be configured as fully differential or single-ended channels. The AD7172-4 integrates key analog and digital signal conditioning blocks, allowing users to configure individual setups for each analog input channel via the SPI interface.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 (fully differential) or 8 (single-ended) | |
| Resolution | 24-bit | |
| Maximum Channel Scan Rate | 6.21 kSPS (161 μs for fully settled data) | |
| Output Data Rates | 1.25 SPS to 31.25 kSPS | |
| Analog Input Buffers | True rail-to-rail buffers | |
| Power Supply | AVDD1 = 3.0 V to 5.5 V, AVDD2 = IOVDD = 2 V to 5.5 V | V |
| Temperature Range | −40°C to +105°C | °C |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 0.75mm) | |
| Digital Interface | SPI, QSPI, MICROWIRE, and DSP compatible |
Key Features
- Integrated true rail-to-rail analog and reference input buffers for easy driving of high impedance inputs.
- Digital filter allowing simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate.
- User-configurable input channels and filter options on a per-channel basis.
- 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.
- Low noise and low power consumption, making it suitable for a variety of applications.
Applications
- Process control: PLC/DCS modules.
- Temperature and pressure measurement.
- Medical and scientific multichannel instrumentation.
- Chromatography.
Q & A
- What is the resolution of the AD7172-4BCPZ ADC?
The AD7172-4BCPZ has a 24-bit resolution.
- How many channels does the AD7172-4BCPZ support?
The device supports 4 fully differential channels or 8 single-ended channels.
- What is the maximum channel scan rate of the AD7172-4BCPZ?
The maximum channel scan rate is 6.21 kSPS (161 μs for fully settled data).
- What is the temperature range of the AD7172-4BCPZ?
The specified temperature range is −40°C to +105°C.
- What types of digital interfaces does the AD7172-4BCPZ support?
The device supports SPI, QSPI, MICROWIRE, and DSP compatible interfaces.
- Does the AD7172-4BCPZ have integrated analog input buffers?
Yes, it has integrated true rail-to-rail analog and reference input buffers.
- Can the AD7172-4BCPZ reject 50 Hz and 60 Hz noise simultaneously?
Yes, the digital filter allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate.
- What is the power supply range for the AD7172-4BCPZ?
The power supply range is AVDD1 = 3.0 V to 5.5 V, AVDD2 = IOVDD = 2 V to 5.5 V.
- What package type is the AD7172-4BCPZ available in?
The device is available in a 32-Lead LFCSP (5mm x 5mm x 0.75mm) package.
- Are there any GPIOs available on the AD7172-4BCPZ?
Yes, the device has general-purpose input/outputs (GPIOs) to control external multiplexers synchronous to the ADC conversion timing.
