AD7172-2BRUZ-RL7
Analog to Digital Converters (ADC)
Technical Specifications
| Type | Description |
|---|---|
| Supply V | 4.25 V |
| Quiescent Current (Iq) | 1uA |
| Integral non - linearity | - |
| Voltage Reference | Built-in |
| Clock/Oscillator | Built-in |
| Resolution(Bits) | 31.25kHz;24 |
| S/N Ratio | - |
| DNL (LSB) | - |
| ADC architecture | Sigma-Delta |
| Type | Description |
|---|---|
| Programmable Gain | Not supported |
| Operating Temp | -40°C ~ +105°C |
| Interface | SPI |
| Working Voltage V | 4.25 V |
| Channels | 2.0 |
| Maximum Clock Speed | 2 MHz |
| Features | Bipolar input;Multi-chip synchronization;Built-in temperature sensor;Bipolar power supply;Multiplexers;Integrated modulator;Built-in digital filter;Auto calibration;Input buffer;Synchronous triggering |
| Package / Case | TSSOP-24 |
Product Introduction
The AD7172-2 is a smart, low noise, low power, multiplexed Σ-Δ ADC with 2/4 channel (fully differential/single-ended) inputs for low bandwidth signals. For fully settled data, the AD7172-2 achieves a maximum channel scan rate of 6.21 kSPS (161 μs). The output data rate ranges from 1.25 SPS to 31.25 kSPS.
The AD7172-2 integrates key analog and digital signal conditioning blocks, allowing users to individually configure each active analog input channel via SPI. Integrated true rail-to-rail buffers on the analog inputs and external reference inputs provide easy-to-drive high impedance inputs. A precision 2.5 V low drift (2 ppm/°C) bandgap internal reference (with output reference buffer) adds embedded functionality to minimize external component count.
The digital filter provides simultaneous 50 Hz and 60 Hz rejection at an output data rate of 27.27 SPS. Users can switch between different filter options to meet per-channel requirements in the application, with additional digital processing features such as offset and gain calibration registers, which are also configurable on a per-channel basis. GPIO pins can control external multiplexers and synchronize to the ADC conversion timing.
The AD7172-2 is rated for an operating temperature range of −40°C to +105°C and is available in a 24-lead TSSOP package.
Features
- Fast and flexible output data rate: 1.25 SPS to 31.25 kSPS
- Channel scan rate: 6.21 kSPS/channel (161 μs settling time)
- 17.2-bit noise-free resolution (31.25 kSPS)
- 24-bit noise-free resolution (5 SPS)
- Integral nonlinearity (INL): ±z ppm of FSR
- 50 Hz and 60 Hz rejection: 85 dB, settling time 50 ms
- User-configurable input channels: 2 fully differential or 4 single-ended channels crosspoint multiplexer
- 2.5 V on-chip reference (±2 ppm/°C drift)
- True rail-to-rail analog and reference input buffers
- Internal or external clock
- Power supply: AVDD1 = 3.0 V to 5.5 V, AVDD2 = IOVDD = 2 V to 5.5 V split supply, AVDD1 and AVSS at ±2.5 V or ±1.65 V
- ADC current: 1.5 mA
- Temperature range: −40°C to +105°C
- 3- or 4-wire serial digital interface (Schmitt trigger on SCLK)
- SPI, QSPI, MICROWIRE, and DSP compatible
Applications
- - Process control: PLC/DCS module temperature and pressure measurement - Medical and scientific multi-channel instrumentation - Chromatography instruments
Datasheet
Alternative Parts
Common AD7172-2BRUZ-RL7 alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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