AD7794BRUZ
Data Converters (ADC/DAC)
Voltage - Supply: 2.7V~5.25V
Technical Specifications
| Type | Description |
|---|---|
| Maximum Clock Speed | 64 kHz |
| Quiescent Current (Iq) | 400uA |
| Integral Non - Linearity | 15LSB |
| Voltage Reference | Built-in |
| Clock/Oscillator | Built-in |
| Resolution(Bits) | 24;470Hz |
| S/N Ratio | - |
| ADC Architecture | Sigma-Delta |
| Type | Description |
|---|---|
| Programmable Gain | Support |
| Operating Temperature | -40°C~+105°C |
| Interface | SPI |
| Supply Voltage | 2.7V~5.25V |
| Channels | 6 |
| Features | Bipolar input;Built-in temperature sensor;Multiplexers;Integrated modulator;Built-in digital filter;Auto calibration;Input buffer;Soft reset;Power-on reset |
| Package / Case | TSSOP-24 |
Product Introduction
The AD7794/AD7795 are low power, low noise, complete analog front ends designed for high precision measurement applications. They incorporate a low noise 24-bit/16-bit, 6-channel differential input Σ-Δ ADC, along with an on-chip low noise instrumentation amplifier that allows small signals to be applied directly to the ADC.
Each device features a precision low noise, low drift internal bandgap voltage reference, and supports up to two external differential references. Additional on-chip features include programmable excitation current sources, burnout current control, and a bias voltage generator that can set the common-mode voltage of any channel to AVDD/2. A low-side power switch can be used to power down bridge sensors between conversions, minimizing overall system power consumption. The AD7794/AD7795 can operate with either an internal or external clock, with output data rates ranging from 4.17 Hz to 470 Hz.
Both devices operate from a 2.7 V to 5.25 V supply. Grade B devices (AD7794 and AD7795) are rated for the -40°C to +105°C temperature range, while Grade C devices (AD7794) are rated for -40°C to +125°C. These devices have a typical current consumption of 400 μA and are available in a 24-lead TSSOP package.
Features
- Up to 23-bit effective resolution
- RMS noise: 40nV (at 4.17Hz), 85nV (at 16.7Hz)
- Current: 400μA (typical)
- Power-down mode: 1μA maximum
- Low-noise programmable gain instrumentation amplifier
- Bandgap voltage reference with typical temperature drift of 4ppm/°C
- Update rate: 4.17Hz to 470Hz
- 6 differential analog inputs
- Internal clock oscillator
- Simultaneous 50Hz/60Hz rejection
- Reference voltage detection
- Programmable current sources
- On-chip bias voltage generator
- Burnout current control
- Low-side power switch
- Supply voltage: 2.7V to 5.25V
- Temperature range: Grade B: -40°C to +105°C; Grade C: -40°C to +125°C
- Separate interface supply
- 24-pin TSSOP package
- 3-wire serial interface, QSPI, MICROWIRE, DSP compatible with Schmitt trigger on SCLK
Applications
- Temperature measurement
- Pressure measurement
- Electronic scales
- Strain gauge sensors
- Gas analysis
- Industrial process control
- Instrumentation
- Blood analysis
- Smart transmitters
- Liquid/gas chromatography
- 6-digit DVM
Datasheet
Alternative Parts
Common AD7794BRUZ 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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