AD9235BRURL7-20

Overview

The AD9235BRURL7-20 is a monolithic, single 3 V supply, 12-bit analog-to-digital converter (ADC) operating at a maximum sampling rate of 20 MSPS. It utilizes a multistage differential pipelined architecture with output error correction logic to guarantee no missing codes across the full industrial temperature range (-40°C to +85°C). The device features a high-performance sample-and-hold amplifier (SHA) and an on-chip voltage reference. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 70.8 dBc at 2.4 MHz input frequency, a Differential Nonlinearity (DNL) of ±0.65 LSB, and an Integral Nonlinearity (INL) of ±0.8 LSB. Power consumption is typically 95 mW under sine wave input conditions.

Feature Summary

• Integrated high-performance sample-and-hold amplifier (SHA) 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 ranges.
• Single-ended clock input with duty cycle stabilizer capability to maintain performance despite clock variations.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and reel specifications. Ensure compatibility with the target PCB footprint and thermal requirements. Confirm that the component meets all necessary regulatory standards for the intended deployment environment before finalizing procurement orders.

Selection Notes

Select this model when a 20 MSPS sampling rate is sufficient for the application bandwidth. Consider the AD9235BRU-40 or AD9235BRU-65 variants if higher throughput is required. Evaluate the power budget carefully, as consumption increases with sampling rate. Ensure the system clock supports the required input frequency range for optimal SNR performance.

Part Context

This component belongs to the AD9235 family of 12-bit ADCs from Analog Devices. The family includes -20, -40, and -65 speed grades, sharing similar pinouts and architectural features. This specific variant represents the 20 MSPS speed grade within the series, designed for applications requiring moderate throughput with low power consumption.

Replacement Considerations

Direct replacements within the same family include the AD9235BRU-40 and AD9235BRU-65, which offer higher sampling rates but may require adjustments to clocking and power management circuits. Verify pinout compatibility and thermal characteristics when substituting with other packages such as LFCSP variants.