AD9231BCPZRL7-40

Overview

The AD9231BCPZRL7-40 is a dual-channel, 12-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum sampling rate of 40 MSPS. It utilizes a multistage differential pipeline architecture with output error correction logic to ensure no missing codes across the full operating temperature range. The device features a patented sample-and-hold circuit and an on-chip voltage reference, supporting a 2 V p-p differential analog input span. It operates from a single 1.8 V analog supply and accommodates digital driver supplies ranging from 1.8 V to 3.3 V. The component is housed in a 64-lead RoHS-compliant LFCSP package and is specified for industrial temperatures between −40°C and +85°C.

Feature Summary

• Multistage differential pipeline architecture with output error correction logic ensures 12-bit accuracy without missing codes.
• Patented sample-and-hold circuit maintains high performance for input frequencies up to 200 MHz.
• Standard serial port interface supports programmable data formatting, internal clock division, power-down modes, and timing adjustments.
• Integrated duty cycle stabilizer compensates for wide variations in clock duty cycles while maintaining ADC performance.

Applications

• Communications systems including GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA
• Diversity radio systems and multimode digital receivers
• I/Q demodulation systems and smart antenna systems
• Battery-powered instruments such as hand-held scope meters
• Portable medical imaging and ultrasound equipment

Procurement Notes

Verify that the ordering suffix RL7 corresponds to the reel packaging format required for your assembly line. Confirm that the specific speed grade matches the system timing requirements, as the AD9231 family includes variants rated for 20, 40, 65, and 80 MSPS. Ensure the design accounts for the 64-lead LFCSP thermal pad connection to the PCB ground plane for proper heat dissipation and noise reduction.

Selection Notes

Select this model when a dual-channel configuration is required alongside low power consumption and high dynamic range. The AD9231 is pin-compatible with other members of the AD92xx family, such as the AD9268, AD9258, AD9251, and AD9204, facilitating migration between different resolutions and speeds within the same footprint. Consider the available digital test pattern generation and data output multiplexing options if system debugging or bus sharing is a priority.

Part Context

The AD9231 belongs to Analog Devices' portfolio of high-speed, low-power data converters designed for demanding signal processing applications. It is part of a broader family of monolithic ADCs that share common architectural features and packaging standards. This specific variant targets applications requiring simultaneous sampling of two channels with precise timing alignment and robust performance in noisy environments.

Replacement Considerations

The AD9231 is pin-compatible with the AD9268, AD9258, AD9251, and AD9204. Designers migrating between these devices can utilize the same board layout, though electrical specifications such as resolution, sampling rate, and power consumption will vary according to the specific part number selected.

FAQ

What digital data formats are supported by the AD9231?

The AD9231 supports offset binary, gray code, and twos complement data formats, which can be configured via the serial port interface or static control pins.

How does the AD9231 handle clock input variations?

The device includes an optional duty cycle stabilizer (DCS) that compensates for wide variations in the clock duty cycle, ensuring consistent performance regardless of input clock waveform quality.

Can the digital outputs be multiplexed onto a single bus?

Yes, the AD9231 offers a data output multiplex option that allows the digital outputs of both channels to be combined onto a single output bus, reducing pin count requirements in the receiving logic.