AD7927BRU

Overview

The AD7927BRU is a 12-bit, high-speed, low-power successive approximation analog-to-digital converter featuring eight single-ended inputs and an integrated channel sequencer. It operates from a single 2.7 V to 5.25 V supply with throughput rates up to 200 kSPS. The device includes a wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. Key electrical specifications include a minimum signal-to-noise ratio of 70 dB, integral nonlinearity of ±1 LSB, and differential nonlinearity of -0.9/+1.5 LSB. Power consumption reaches a maximum of 7.5 mW at 5 V and 3.6 mW at 3 V during operation.

Feature Summary

• Eight single-ended analog inputs managed by a programmable channel sequencer for automated sequential conversions.
• Flexible power management modes including normal operation, auto shutdown, and full shutdown to optimize energy efficiency.
• VDRIVE function enabling the serial interface to connect directly to 3 V or 5 V processor systems independent of AVDD.
• High-speed serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards without pipeline delays.

Applications

• Industrial process control systems requiring multi-channel data acquisition.
• Automotive sensor interfaces and monitoring circuits.
• Portable instrumentation utilizing battery-powered single-supply operation.
• Data acquisition modules in embedded microprocessor or DSP environments.

Procurement Notes

Verify the specific suffix against the manufacturer's current ordering guide to confirm package type and temperature range. Confirm RoHS compliance status and automotive qualification requirements if applicable. Ensure the source document matches the exact part number to avoid discrepancies in pinout or electrical characteristics.

Selection Notes

Select this component when a balance of moderate resolution and high sampling speed is required for multiple channels. Consider the external reference requirement and the specific input voltage range configuration options. Evaluate the power consumption profiles across different supply voltages and throughput rates to match system constraints.

Part Context

The AD7927 belongs to Analog Devices' family of 12-bit successive approximation ADCs designed for general-purpose data acquisition. It shares architectural similarities with other devices in the series but distinguishes itself through its eight-channel multiplexing capability and integrated sequencer functionality within a compact 20-lead TSSOP package.

Replacement Considerations

Check the AD7927BRUZ for identical electrical specifications with a different packaging option. Verify compatibility with the AD7923 if fewer channels are sufficient for the application. Ensure any substitute maintains the same serial interface timing and power supply requirements.