Overview
The AD7172-2BRUZ-RL7 is a low noise, low power, multiplexed, Σ-Δ (Sigma-Delta) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is designed for applications requiring high precision and low bandwidth signal conversion. It features 2- or 4-channel inputs that can be configured as fully differential or single-ended, making it versatile for various measurement tasks. The AD7172-2 is housed in a 24-lead Thin Shrink Small Outline Package (TSSOP) and operates over a wide temperature range of −40°C to +105°C.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 24 bits |
| Output Data Rate | Range of output data rates | 1.25 SPS to 31.25 kSPS |
| Channel Configuration | Number and type of input channels | 2- or 4-channel (fully differential/single-ended) |
| Maximum Channel Scan Rate | Maximum scan rate for fully settled data | 6.21 kSPS (161 µs) |
| Package Type | Type of package | 24-lead TSSOP |
| Operating Temperature Range | Temperature range for operation | −40°C to +105°C |
| Power Consumption | Typical power consumption in full operating mode | 3.16 mW (AVDD1 = 3.3 V, AVDD2 = 2 V, IOVDD = 2 V) |
| Interface | Type of serial digital interface | 3- or 4-wire serial digital interface (SPI, QSPI-, MICROWIRE-, and DSP-compatible) |
Key Features
- True Rail-to-Rail Buffers: Integrated true rail-to-rail buffers on the analog inputs and external reference inputs, making it easy to drive high impedance inputs.
- Precision Reference: A 2.5 V low drift (2 ppm/°C) band gap internal reference with an output reference buffer to reduce external component count.
- Digital Filter: Allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate, with configurable filter options for each channel.
- Configurable Channels: Each analog input channel can be configured individually via the SPI interface, including offset and gain calibration registers.
- General-Purpose Inputs/Outputs (GPIOs): Control external multiplexers synchronous to the ADC conversion timing).
Applications
- Process Control: Suitable for PLC/DCS modules).
- Temperature and Pressure Measurement: Ideal for precision measurement in various industrial and scientific applications).
- Medical and Scientific Multichannel Instrumentation: Used in medical devices and scientific instruments requiring high precision and low noise).
- Chromatography: Applicable in chromatography systems due to its high precision and low bandwidth signal handling capabilities).
Q & A
- What is the resolution of the AD7172-2BRUZ-RL7 ADC?
The AD7172-2BRUZ-RL7 has a resolution of 24 bits.
- What are the output data rates of the AD7172-2BRUZ-RL7?
The output data rates range from 1.25 SPS to 31.25 kSPS.
- How many input channels does the AD7172-2BRUZ-RL7 support?
The AD7172-2BRUZ-RL7 supports 2- or 4-channel inputs, which can be configured as fully differential or single-ended.
- What is the maximum channel scan rate of the AD7172-2BRUZ-RL7?
The maximum channel scan rate is 6.21 kSPS (161 µs) for fully settled data.
- In what package is the AD7172-2BRUZ-RL7 available?
The AD7172-2BRUZ-RL7 is available in a 24-lead TSSOP package.
- What is the operating temperature range of the AD7172-2BRUZ-RL7?
The operating temperature range is −40°C to +105°C.
- What type of serial interface does the AD7172-2BRUZ-RL7 support?
The AD7172-2BRUZ-RL7 supports a 3- or 4-wire serial digital interface (SPI, QSPI-, MICROWIRE-, and DSP-compatible).
- Does the AD7172-2BRUZ-RL7 have integrated true rail-to-rail buffers?
Yes, the AD7172-2BRUZ-RL7 has integrated true rail-to-rail buffers on the analog inputs and external reference inputs.
- What is the precision of the internal reference of the AD7172-2BRUZ-RL7?
The internal reference has a low drift of 2 ppm/°C and is 2.5 V.
- Can the digital filter of the AD7172-2BRUZ-RL7 reject both 50 Hz and 60 Hz noise?
Yes, the digital filter can reject both 50 Hz and 60 Hz noise simultaneously at a 27.27 SPS output data rate.
