Overview
The AD7794CRUZ, produced by Analog Devices Inc., is a low power, low noise, complete analog front end designed for high precision measurement applications. This device features a 24-bit Σ-Δ analog-to-digital converter (ADC) with six differential inputs, making it ideal for applications requiring high accuracy and low noise performance.
The AD7794 includes an on-chip low noise instrumentation amplifier, allowing direct interface of small amplitude signals to the ADC. It also contains a precision, low noise, low drift internal band gap reference and can accept up to two external differential references. The device operates with a power supply from 2.7 V to 5.25 V and consumes a typical current of 400 μA.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24-bit | - |
| Number of Channels | 6 differential inputs | - |
| Noise Performance | 40 nV @ 4.17 Hz, 85 nV @ 16.7 Hz | nV |
| Output Data Rate | 4.17 Hz to 470 Hz | Hz |
| Power Supply | 2.7 V to 5.25 V | V |
| Current Consumption | 400 μA typical, 1 μA maximum in power-down | μA |
| Temperature Range | –40°C to +125°C (C grade) | °C |
| Package Type | 24-lead TSSOP | - |
Key Features
- Low noise, 24-bit Σ-Δ ADC with on-chip instrumentation amplifier
- Six differential analog inputs
- Precision, low noise, low drift internal band gap reference
- Accepts up to two external differential references
- Programmable excitation current sources and burnout currents
- Bias voltage generator for setting common-mode voltage
- Low-side power switch for powering down bridge sensors
- Internal clock oscillator with option for external clock
- Simultaneous 50 Hz/60 Hz rejection and reference detect
- Independent interface power supply
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP
Applications
- Temperature measurement
- Pressure measurement
- Weigh scales
- Strain gage transducers
- Gas analysis
- Industrial process control
- Instrumentation
- Blood analysis
- Smart transmitters
- Liquid/gas chromatography
- 6-digit DVM
Q & A
- What is the resolution of the AD7794CRUZ?
The AD7794CRUZ has a 24-bit resolution.
- How many differential analog inputs does the AD7794CRUZ have?
The AD7794CRUZ has six differential analog inputs.
- What is the noise performance of the AD7794CRUZ?
The noise performance is 40 nV @ 4.17 Hz and 85 nV @ 16.7 Hz.
- What is the output data rate range of the AD7794CRUZ?
The output data rate ranges from 4.17 Hz to 470 Hz.
- What is the power supply range for the AD7794CRUZ?
The power supply range is from 2.7 V to 5.25 V.
- What is the typical current consumption of the AD7794CRUZ?
The typical current consumption is 400 μA, with a maximum of 1 μA in power-down mode.
- What is the temperature range for the AD7794CRUZ?
The temperature range is –40°C to +125°C for the C grade.
- What type of package does the AD7794CRUZ come in?
The AD7794CRUZ comes in a 24-lead TSSOP package.
- Does the AD7794CRUZ have an internal clock oscillator?
Yes, the AD7794CRUZ has an internal clock oscillator and also supports an external clock.
- What are some common applications of the AD7794CRUZ?
