AD9057BRSZ-40

Overview

The AD9057BRSZ-40 is an 8-bit monolithic analog-to-digital converter optimized for low cost, low power, and small size. It features a full-power analog bandwidth of 120 MHz and operates at a maximum encode rate of 40 MSPS. The device includes an internal 2.5 V reference and track-and-hold circuit, requiring only a single 5 V analog supply and a 3 V to 5 V digital supply. Typical power dissipation is 192 mW, with a power-down mode consuming less than 10 mW. It utilizes a parallel interface and is housed in a 20-lead SSOP package.

Feature Summary

• Integrates an on-chip 2.5 V voltage reference and track-and-hold circuit to minimize external component requirements.
• Supports flexible logic interfacing with both 5 V and 3 V digital supplies via the VDD pin.
• Features a dedicated power-down function that reduces total power consumption below 10 mW.

Applications

• Digital Communications (QAM Demodulators)
• RGB and YC/Composite Video Processing
• Digital Data Storage Read Channels

Procurement Notes

Verify the specific performance grade suffix (-40) corresponds to the required 40 MSPS maximum conversion rate during procurement. Confirm the RS-20 package option matches the target PCB footprint. Ensure the industrial temperature range specification aligns with the operational environment requirements before finalizing orders.

Selection Notes

Select this model when a 40 MSPS sampling rate is sufficient for the application, as it offers lower power consumption compared to higher-grade variants. Consider the AD9059 if dual-channel digitization is required. Evaluate the 120 MHz analog bandwidth against the input signal frequency to ensure adequate dynamic performance and settling time for the specific system design.

Part Context

This component belongs to the AD9057 series of 8-bit high-speed ADCs from Analog Devices. It shares the same core architecture and package as the -60 and -80 grades, differing primarily in the guaranteed maximum encoding speed. The series is designed for applications requiring a balance of performance, power efficiency, and system simplicity.

Replacement Considerations

The AD9057BRSZ-60 and AD9057BRSZ-80 are direct functional replacements with identical pinouts and specifications, offering higher maximum sampling rates of 60 MSPS and 80 MSPS respectively. These can be used if the system requires higher throughput without changing the hardware layout.