AD7924BRU

Overview

The AD7924BRU is a 12-bit, 4-channel successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates on a single 2.7 V to 5.25 V supply with a maximum throughput rate of 1 MSPS. The device features four single-ended inputs managed by a channel sequencer and includes a wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. Power consumption reaches a maximum of 13.5 mW at 5 V supplies during operation. It utilizes a high-speed serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. The component is housed in a 16-lead TSSOP package and meets automotive qualification standards.

Feature Summary

• Integrated channel sequencer for automated multi-channel conversion sequences
• Flexible power management with configurable shutdown modes to minimize current draw
• VDRIVE function enabling direct interfacing with 3 V or 5 V processor systems independent of AVDD
• No pipeline delay architecture allowing precise sampling control via the CS signal

Applications

• Portable medical instrumentation requiring low power and high accuracy
• Industrial process control and data acquisition systems
• Battery-powered measurement devices
• Automotive electronic sensing applications

Procurement Notes

Verify the specific suffix 'BRU' corresponds to the commercial temperature grade (-40°C to +85°C) rather than the automotive 'W' variant. Confirm that the external reference voltage is set to 2.5 V ±1% for specified performance. Ensure the ordering documentation matches the 16-lead TSSOP physical package dimensions before finalizing procurement.

Selection Notes

Select this model when 12-bit resolution is required alongside multi-channel sequencing capabilities. Compare against AD7904 and AD7914 if lower resolution suffices for the application. Consider the AD7924WYRUZ variant if automotive qualification under extended temperature ranges is mandatory. Evaluate power constraints against the 13.5 mW maximum dissipation at full throughput rates.

Part Context

This component belongs to the AD7904/AD7914/AD7924 family of high-speed, low-power ADCs. All members share identical pinouts, interfaces, and functional blocks, differing only in resolution: 8-bit for AD7904, 10-bit for AD7914, and 12-bit for AD7924. The BRU suffix denotes the commercial temperature range version packaged in TSSOP-16.

Replacement Considerations

The AD7924WYRUZ serves as the automotive-grade equivalent within the same package and specification profile. Direct pin-compatible substitutes include the AD7904BRU and AD7914BRU, provided the system can accommodate their respective 8-bit and 10-bit resolutions.