AD7904WYRUZ-REEL7

Overview

The AD7904WYRUZ-REEL7 is an automotive-grade, 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 managed by a programmable channel sequencer. It utilizes a flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. The component is housed in a 16-lead TSSOP package and is qualified for operation within the extended temperature range of -40°C to +125°C.

Feature Summary

• Integrated channel sequencer enables automated sequential conversion across multiple single-ended input channels without external control overhead.
• VDRIVE function allows the digital serial interface logic levels to operate independently of the analog supply voltage, facilitating direct connection to 3 V or 5 V processors.
• Flexible power management includes full shutdown and auto-shutdown modes to minimize current consumption during idle periods or lower throughput requirements.

Applications

• Automotive sensor signal acquisition systems
• Industrial data acquisition front-ends
• Battery monitoring circuits

Procurement Notes

Verify that the specific part number suffix corresponds to the W grade, which indicates automotive qualification and an extended operating temperature range up to +125°C. Confirm the REEL7 packaging designation matches the required tape and reel specifications for automated assembly processes. Ensure compatibility with the target system's voltage domains before integration.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application's accuracy requirements. The W suffix denotes automotive reliability and extended temperature performance compared to the standard B version. Consider the 1 MSPS throughput limit and the requirement for an external reference voltage when designing the signal chain. Evaluate the power consumption trade-offs between normal operation and shutdown modes based on system duty cycles.

Part Context

This device belongs to the AD7904/AD7914/AD7924 family of high-speed, low-power ADCs. While sharing identical pinouts and core architectures, the family differentiates by resolution: the AD7904 provides 8 bits, the AD7914 offers 10 bits, and the AD7924 delivers 12 bits. The W variant specifically meets automotive quality standards, distinguishing it from commercial grade counterparts.

Replacement Considerations

The AD7904BRUZ-REEL7 serves as a commercial-grade alternative with identical electrical characteristics but a limited operating temperature range of -40°C to +85°C. No other direct substitutes are documented in the provided source material.