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AD7797BRUZ
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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：24
- Sampling Rate (Per Second)：123
- Number of Inputs：1
- 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
- Voltage - Supply, Analog：2.7V ~ 5.25V
- Voltage - Supply, Digital：2.7V ~ 5.25V
- Features：Temperature Sensor
- Operating Temperature：-40°C ~ 85°C
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-TSSOP
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7797BRUZ is a low-power, 24-bit Sigma-Delta analog-to-digital converter designed for high-precision bridge sensor applications. It features an on-chip instrumentation amplifier with a fixed gain of 128 and a temperature sensor. The device operates on a 2.7 V to 5.25 V supply, consuming 250 µA typically. It supports software-programmable output data rates from 4.17 Hz to 123 Hz and offers simultaneous 50 Hz/60 Hz rejection. The component utilizes a 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards.
Feature Summary
- Integrated instrumentation amplifier with fixed gain of 128
- On-chip temperature sensor for bridge compensation
- Internal clock oscillator or external clock support
- Simultaneous 50 Hz/60 Hz line frequency rejection
Applications
- Weigh scales
- Strain gages
- Industrial process control
- Portable instrumentation
Procurement Notes
Verify the specific B version suffix against the manufacturer's current ordering guide to confirm package type and temperature range specifications. Confirm that the 16-lead TSSOP package matches the target PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a single-channel, high-resolution ADC with integrated signal conditioning is required. Ensure the application benefits from the fixed 128x gain and internal reference capabilities. Verify that the 24-bit resolution meets the system noise floor requirements at the desired update rate.
Part Context
This part belongs to the AD7796/AD7797 family of complete analog front ends. The AD7797 variant specifically provides 24-bit resolution, whereas the AD7796 offers 16-bit resolution. Both share identical pinouts and functional blocks, differing primarily in conversion depth.
Replacement Considerations
The AD7796BRUZ is a direct pin-compatible alternative within the same datasheet offering lower 16-bit resolution. Other Analog Devices sigma-delta ADCs may require schematic redesign due to different interface protocols or gain configurations.
