AD7908BRUZ-REEL7

Overview

The AD7908BRUZ-REEL7 is an 8-bit, 8-channel successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.25 V supply and achieves throughput rates up to 1 MSPS. The device features eight single-ended analog inputs with a programmable channel sequencer and a wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. Power consumption is specified at 6.0 mW maximum at 1 MSPS with a 3 V supply and 13.5 mW maximum at 1 MSPS with a 5 V supply. It utilizes a high-speed serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards.

Feature Summary

• Integrated channel sequencer for automated sequential conversion of multiple single-ended inputs
• VDRIVE function enabling direct connection to 3 V or 5 V processor systems independent of the analog supply
• Flexible power management with auto shutdown and full shutdown modes to minimize current draw
• No pipeline delays associated with the standard successive approximation conversion process

Applications

• Industrial process control systems requiring multi-channel data acquisition
• Battery-powered instrumentation utilizing low power consumption capabilities
• Automotive applications leveraging automotive qualification standards
• Data acquisition modules interfacing with microprocessors or DSPs via serial interfaces

Procurement Notes

Verify the specific suffix REEL7 corresponds to tape and reel packaging when sourcing. Confirm that the B version meets the required -40°C to +85°C operating temperature range for your application environment. Ensure the external reference voltage is maintained within the specified 2.5 V ±1% tolerance to guarantee accurate performance specifications.

Selection Notes

Select this component when eight single-ended channels are required without the need for bipolar input ranges inherent in other variants. Consider the AD7918 or AD7928 if higher resolution (10-bit or 12-bit) is necessary, noting that DC accuracy parameters such as offset and gain errors increase with resolution. Verify that the 8 MHz full power bandwidth satisfies the highest frequency components present in your analog input signals.

Part Context

This part belongs to the AD7908/AD7918/AD7928 family of high-speed, low-power ADCs. All members share identical pinouts, package options, and functional architectures, differing primarily in resolution and resulting dynamic performance metrics. The BRUZ designation indicates the commercial temperature grade variant housed in a 20-lead TSSOP package.

Replacement Considerations

The AD7908BRU is the non-reel equivalent of this component. For higher resolution requirements within the same package, consider the AD7918BRUZ or AD7928BRUZ. Lower channel count alternatives include the AD7904 series.