AD9235BRU-65

Overview

The AD9235BRU-65 is a monolithic, single-supply, 12-bit analog-to-digital converter operating at a maximum sampling rate of 65 MSPS. It utilizes a multistage differential pipelined architecture with output error correction logic to ensure no missing codes across the industrial temperature range (-40°C to +85°C). The device features an on-chip high-performance sample-and-hold amplifier (SHA) and voltage reference, powered by a single 3 V supply (2.7 V to 3.6 V). It accepts differential or single-ended analog inputs with a bandwidth up to 500 MHz and flexible input ranges from 1 V p-p to 2 V p-p. Digital outputs are available in offset binary or two's complement formats.

Feature Summary

• Integrated high-performance sample-and-hold amplifier and internal voltage reference for simplified system design.
• Multistage differential pipelined architecture with output error correction logic ensuring 12-bit accuracy without missing codes.
• Flexible analog input configuration supporting both differential and single-ended modes with selectable input spans.
• Built-in clock duty cycle stabilizer maintains performance over wide variations in clock pulse widths.

Applications

• Ultrasound equipment
• IF sampling in communications receivers
• Battery-powered instruments

Procurement Notes

Verify the specific ordering suffix RU-28 corresponds to the 28-lead TSSOP package when sourcing components. Confirm that the -65 designation matches the required 65 MSPS data rate specification for the target application. Ensure compatibility with the industrial temperature range requirements during procurement planning.

Selection Notes

Select this component for applications requiring 12-bit resolution at high speeds up to 65 MSPS with low power consumption. Consider the separate digital driver supply (DRVDD) for interfacing with 2.5 V or 3.3 V logic families. Evaluate the need for external versus internal reference configurations based on noise sensitivity requirements.

Part Context

This part belongs to the AD9235 family of 12-bit ADCs, which also includes variants operating at 20 MSPS and 40 MSPS. The BRU-65 specifically denotes the 65 MSPS speed grade housed in the 28-lead TSSOP package. It shares architectural similarities with other Analog Devices converters like the AD9214-65, facilitating potential upgrade paths from lower-resolution systems.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD9235BRU-20 and AD9235BRU-40, though these operate at lower sampling rates. Designers upgrading from 10-bit systems may consider the AD9214-65 as a predecessor, noting the resolution difference.