Overview
The AD7194BCPZ-REEL, produced by Analog Devices Inc., is a highly integrated, low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC) designed for high precision measurement applications. It features an on-chip low noise gain stage, allowing signals of small amplitude to interface directly with the ADC. The device can be configured for either eight differential inputs or sixteen pseudo differential inputs. It operates with a flexible digital filter and offers a range of output data rates from 4.7 Hz to 4.8 kHz, making it suitable for various precision measurement tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24-bit |
| Output Data Rate | 4.7 Hz to 4.8 kHz |
| Input Configuration | 8 differential or 16 pseudo differential inputs |
| Clock Source | Internal (4.92 MHz) or external clock/crystal |
| Power Supply | AVDD: 3 V to 5.25 V, DVDD: 2.7 V to 5.25 V |
| Current Consumption | 4.65 mA |
| Temperature Range | −40°C to +105°C |
| Package | 32-lead LFCSP |
| Interface | 3-wire serial SPI, QSPI™, MICROWIRE™, and DSP compatible |
| Programmable Gain | 1 to 128 |
| General Purpose Digital Outputs | 4 |
Key Features
- Low noise, 24-bit sigma-delta ADC with on-chip low noise gain stage.
- Flexible digital filter with fast settling option and zero latency for settled conversions.
- Simultaneous 50 Hz/60 Hz rejection.
- Programmable gain from 1 to 128.
- Four general-purpose digital outputs.
- Support for internal or external clock sources.
- 3-wire serial interface compatible with SPI, QSPI™, MICROWIRE™, and DSP.
Applications
- PLC/DCS analog input modules.
- Data acquisition systems.
- Strain gage transducers.
- Pressure measurement.
- Temperature measurement.
- Flow measurement.
- Weigh scales.
- Chromatography.
- Medical and scientific instrumentation.
Q & A
- What is the resolution of the AD7194 ADC?
The AD7194 has a 24-bit resolution.
- What are the possible input configurations for the AD7194?
The AD7194 can be configured for either eight differential inputs or sixteen pseudo differential inputs.
- What is the range of output data rates for the AD7194?
The output data rate can be varied from 4.7 Hz to 4.8 kHz.
- What are the power supply requirements for the AD7194?
The device operates with a power supply from 3 V to 5.25 V for AVDD and 2.7 V to 5.25 V for DVDD.
- What is the current consumption of the AD7194?
The AD7194 consumes a current of 4.65 mA.
- What is the temperature range for the AD7194?
The device operates within a temperature range of −40°C to +105°C.
- What type of package does the AD7194 come in?
The AD7194 is housed in a 32-lead LFCSP package.
- What interfaces does the AD7194 support?
The AD7194 supports 3-wire serial SPI, QSPI™, MICROWIRE™, and DSP compatible interfaces.
- Does the AD7194 have programmable gain?
Yes, the AD7194 has programmable gain from 1 to 128.
- What are some common applications of the AD7194?
The AD7194 is used in PLC/DCS analog input modules, data acquisition systems, strain gage transducers, pressure measurement, temperature measurement, flow measurement, weigh scales, chromatography, and medical and scientific instrumentation.
