AD9235BCPZ-65

Overview

The AD9235BCPZ-65 is a monolithic, single-channel, 12-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 65 MSPS and requires a single 3 V supply (2.7 V to 3.6 V). The device utilizes a multistage differential pipelined architecture with output error correction logic to ensure no missing codes across the full operating temperature range (-40°C to +85°C). Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 70.5 dBc at 65 MSPS and a Spurious-Free Dynamic Range (SFDR) of 85 dBc. Power consumption is rated at 350 mW under sine wave input conditions. The component is housed in a 32-lead LFCSP package.

Feature Summary

• Integrated high-performance sample-and-hold amplifier (SHA) with wide bandwidth for flexible analog input configurations.
• Built-in voltage reference and clock duty cycle stabilizer (DCS) to maintain performance over varying clock pulse widths.
• Supports offset binary or two's complement digital data formats with an out-of-range (OTR) indicator.
• Separate digital output driver supply allows compatibility with both 2.5 V and 3.3 V logic families.

Applications

• Ultrasound equipment
• IF sampling in communications receivers
• IS-95, CDMA-One, IMT-2000 systems
• Battery-powered instruments
• Low-cost digital oscilloscopes

Procurement Notes

Verify the specific suffix 'BCPZ' corresponds to the 32-lead LFCSP package variant when sourcing. Confirm that the required sampling rate matches the '-65' designation for 65 MSPS operation. Ensure the design accommodates the separate AVDD and DRVDD power domains as specified in the datasheet. Check for RoHS compliance status if environmental regulations apply to the target deployment.

Selection Notes

Select this model when a single-channel, 12-bit resolution is required at speeds up to 65 MSPS. Consider the LFCSP package for space-constrained designs requiring efficient thermal dissipation via the exposed paddle. Evaluate the internal reference options against external precision requirements. Verify that the 3 V single-supply architecture aligns with the system's power budget and available voltage rails.

Part Context

This component belongs to the AD9235 family, which includes variants operating at 20 MSPS and 40 MSPS. The AD9235 series shares architectural similarities with the AD9214-65, providing a simplified upgrade path from 10-bit to 12-bit systems. The BC prefix typically denotes the industrial temperature grade and specific packaging configuration within the Analog Devices portfolio.

Replacement Considerations

The AD9235BRUZ-65 serves as a pin-compatible alternative in a 28-lead TSSOP package. Designers upgrading from the AD9214-65 may find the AD9235 suitable due to similar pinout arrangements. Cross-referencing thermal impedance values between TSSOP and LFCSP packages is necessary for PCB layout adjustments.