AD7904BRUZ-REEL

Overview

The AD7904BRUZ-REEL is an 8-bit, 4-channel successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates on a single supply voltage ranging from 2.7 V to 5.25 V and supports throughput rates up to 1 MSPS. The device features four single-ended analog inputs with a built-in sequencer for automated channel cycling. It utilizes a low-noise 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. The component is housed in a 16-lead TSSOP package.

Feature Summary

• Integrated channel sequencer enables automatic sequential conversion across multiple single-ended inputs without processor intervention.
• Flexible power management includes full shutdown and auto-shutdown modes to minimize current draw during idle periods.
• VDRIVE function allows the serial interface logic levels to operate independently of the analog supply voltage.
• Standard successive approximation architecture ensures no pipeline delays between sampling and data output.

Applications

• Battery-powered instrumentation systems requiring low power consumption
• Industrial process control monitoring with multiple sensor inputs
• Data acquisition modules interfacing with microprocessors or DSPs

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as reel specifications may vary. Confirm that the B version temperature range meets the operational requirements for the intended environment. Ensure the external reference voltage source adheres to the specified tolerance for optimal performance.

Selection Notes

Select this component when eight-bit resolution is sufficient for the application's accuracy needs. Consider the AD7914 or AD7924 if higher resolution or improved dynamic performance metrics are required. Evaluate the external reference voltage stability, as the ADC performance depends heavily on the REFIN pin quality.

Part Context

This part belongs to the AD7904/AD7914/AD7924 family of high-speed, low-power ADCs. All members share identical pinouts, functional blocks, and serial interface protocols. The primary distinction lies in the resolution: 8 bits for the AD7904, 10 bits for the AD7914, and 12 bits for the AD7924.

Replacement Considerations

The AD7904WYRUZ serves as the automotive qualified alternative within the same series. It maintains identical electrical characteristics but offers an extended operating temperature range compared to the commercial B version.