Overview
The AD7177-2BRUZ-RL7, produced by Analog Devices Inc., is a 32-bit, low noise, fast settling, multiplexed analog-to-digital converter (ADC) designed for low bandwidth inputs. This Σ-Δ ADC is available in a 24-lead TSSOP package and features integrated true rail-to-rail analog input buffers and external reference inputs, making it suitable for a variety of precision measurement applications. The device supports 2 fully differential or 4 single-ended channels and offers a maximum channel scan rate of 10 kSPS with a settling time of 100 µs for fully settled data. The output data rates range from 5 SPS to 10 kSPS, providing flexibility in different application scenarios.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 32-bit |
| Maximum Channel Scan Rate | 10 kSPS (100 µs settling time) |
| Output Data Rates | 5 SPS to 10 kSPS |
| Number of Channels | 2 fully differential or 4 single-ended |
| Internal Reference | 2.5 V, ±2 ppm/°C drift |
| Power Supply | AVDD1 - AVSS = 5 V, AVDD2 = IOVDD = 2 V to 5 V; Split supply with AVDD1/AVSS at ±2.5 V |
| Operating Temperature Range | −40°C to +105°C |
| Package Type | 24-lead TSSOP |
| Digital Interface | SPI, QSPI, MICROWIRE, and DSP compatible |
Key Features
- Integrated true rail-to-rail analog input buffers and external reference inputs for easy driving of high impedance inputs.
- Precision 2.5 V low drift (2 ppm/°C) band gap internal reference with output reference buffer to reduce external component count.
- Digital filter allowing simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate.
- User configurable input channels and digital processing functions including offset and gain calibration registers on a per channel basis.
- On-chip crosspoint multiplexer for channel selection.
- Support for internal or external clock.
Applications
- Process control: PLC/DCS modules.
- Temperature and pressure measurement.
- Medical and scientific multichannel instrumentation.
- Chromatography.
Q & A
- What is the resolution of the AD7177-2 ADC?
The AD7177-2 has a 32-bit resolution.
- What is the maximum channel scan rate of the AD7177-2?
The maximum channel scan rate is 10 kSPS with a settling time of 100 µs.
- How many channels does the AD7177-2 support?
The device supports 2 fully differential or 4 single-ended channels.
- What is the operating temperature range of the AD7177-2?
The operating temperature range is −40°C to +105°C.
- What type of digital interface does the AD7177-2 support?
The device supports SPI, QSPI, MICROWIRE, and DSP compatible interfaces.
- Does the AD7177-2 have an internal reference?
Yes, it has a 2.5 V internal reference with ±2 ppm/°C drift.
- What is the power supply requirement for the AD7177-2?
The device operates with AVDD1 - AVSS = 5 V, or with ±2.5 V AVDD1/AVSS, and 2 V to 5 V AVDD2 and IOVDD supplies.
- What package type is the AD7177-2 available in?
The device is available in a 24-lead TSSOP package.
- Does the AD7177-2 support simultaneous 50 Hz and 60 Hz rejection?
Yes, the digital filter allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate.
- Can the AD7177-2 be configured on a per channel basis?
Yes, the device allows user configuration of input channels and digital processing functions on a per channel basis.
