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AD7794BRUZ-REEL
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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 24TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Bits：24
- Sampling Rate (Per Second)：470
- Number of Inputs：6
- Input Type：Differential
- Data Interface：SPI, DSP
- Configuration：MUX-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External, Internal
- Voltage - Supply, Analog：2.7V ~ 5.25V
- Voltage - Supply, Digital：2.7V ~ 5.25V
- Features：PGA, Temperature Sensor
- Operating Temperature：-40°C ~ 105°C
- Package / Case：24-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：24-TSSOP
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7794BRUZ-REEL is a low-power, low-noise analog front end featuring a 24-bit Sigma-Delta ADC with six differential inputs. It integrates a programmable gain instrumentation amplifier (gain 1 to 128), an internal bandgap reference (1.17 V typical), and excitation current sources. The device operates on a 2.7 V to 5.25 V supply, consuming 400 μA typically. It supports update rates from 4.17 Hz to 470 Hz and includes simultaneous 50/60 Hz rejection. The B-grade part functions within a temperature range of −40°C to +105°C and is housed in a 24-lead TSSOP package.
Feature Summary
- Integrates a 24-bit Sigma-Delta ADC with six differential analog input channels and a programmable gain instrumentation amplifier.
- Includes an internal precision bandgap reference and programmable excitation current sources for direct sensor interfacing.
- Features a low-side power switch to minimize system power consumption by powering down bridge sensors between conversions.
Applications
- Temperature measurement
- Pressure measurement
- Weigh scales
- Strain gage transducers
- Industrial process control
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure the component grade matches the required operating temperature range for the intended application environment.
Selection Notes
Select this component for high-precision applications requiring multiple differential inputs and integrated signal conditioning. Consider the internal reference accuracy and noise performance relative to the required resolution at specific output data rates.
Part Context
This component belongs to the AD7794/AD7795 family of complete analog front ends designed for high-precision measurement applications. It shares architectural similarities with other low-power Sigma-Delta ADCs but is distinguished by its six-channel configuration and integrated bias voltage generator.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided source material.
FAQ
Can the AD7794 operate with both internal and external references?
Yes, the device contains an internal bandgap reference but can also accept up to two external differential references.
What is the function of the PSW pin?
The PSW pin controls the low-side power switch, which can be used to power down bridge sensors between conversions to minimize system power consumption.
How does the device handle clocking?
The AD7794 can operate with either an internal clock oscillator or an external clock, allowing synchronization with other devices if needed.
