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AD7734BRU
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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 28TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：24
- Sampling Rate (Per Second)：15.4k
- Number of Inputs：4
- Input Type：Single Ended
- 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：5V
- Voltage - Supply, Digital：2.7V ~ 3.6V, 5V
- Features：True Bipolar
- Operating Temperature：-40°C ~ 105°C
- Package / Case：28-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-TSSOP
- Mounting Type：Surface Mount
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Overview
The AD7734BRU is a high-precision, high-throughput analog front end featuring a 24-bit Sigma-Delta ADC with four single-ended input channels. It supports ±10 V, ±5 V, and unipolar ranges while operating from a single +5 V analog supply. The device offers up to 15.4 kS/s data rates and includes on-chip per-channel system calibration. It features overvoltage tolerance up to ±16.5 V without affecting adjacent channels. The digital interface is compatible with SPI, QSPI, Microwire, and DSP systems.
Feature Summary
- High-resolution 24-bit conversion with no missing codes
- Configurable for fast channel switching in multiplexing applications
- On-chip per-channel system calibration capability
- Overvoltage tolerant inputs protecting adjacent channels
Applications
- PLCs/DCS
- Multiplexing applications
- Process control
- Industrial instrumentation
Procurement Notes
Verify the specific suffix against official documentation to confirm package type and temperature range. Confirm RoHS compliance status through manufacturer datasheets or authorized distributors. Ensure ordering details match the required interface and supply voltage specifications for the target application.
Selection Notes
Select this component for applications requiring high throughput and wide input voltage ranges. Consider the AD7732 for differential inputs or the AD7738 for higher channel counts. Evaluate power consumption requirements as the device operates from a single 5 V analog supply with flexible digital supply options.
Part Context
The AD7734 belongs to the AD7734 family of high-performance analog-to-digital converters. It is designed for precision measurement systems where high resolution and speed are critical. The device integrates a sigma-delta modulator, digital filter, and serial interface into a compact TSSOP package.
Replacement Considerations
The AD7732 serves as a similar alternative with two fully differential input channels. The AD7738 provides eight single-ended or four fully differential channels with different input ranges. Verify pin compatibility and register configurations when substituting these family members.
FAQ
What is the maximum overvoltage the AD7734 can tolerate?
The AD7734 accepts an analog input overvoltage up to ±16.5 V without degrading the performance of adjacent channels.
How does chopping affect the AD7734's performance?
Enabling chopping reduces offset drift but increases conversion time. Disabling chopping allows for faster data rates up to 15.4 kHz while maintaining high resolution.
What digital interfaces are supported by the AD7734?
The device supports 3-wire serial interfaces compatible with SPI, QSPI, Microwire, and DSP systems.
