AD7725BSZ

Overview

The AD7725BSZ is a 16-bit analog-to-digital converter featuring an on-chip programmable postprocessor. It supports input sample rates up to 14.4 MHz and delivers output word rates of up to 900 kSPS. The device includes a built-in 2.5 V reference, operates on 5 V supplies, and accepts bipolar or unipolar inputs. It utilizes a 44-lead MQFP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Features a fully user-programmable postprocessor capable of up to 130 million MACs per second for custom signal conditioning.
• Supports flexible programming modes allowing boot from DSP or external EPROM via parallel or serial interfaces.
• Integrates an internal 2.5 V voltage reference with the option to utilize an external system reference source.

Applications

• Radar systems
• Sonar applications
• Medical communications equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Confirm availability status as product lifecycles may change. Ensure proper ESD handling protocols are followed during storage and installation due to device sensitivity.

Selection Notes

Select this component when high-resolution conversion requires customizable digital filtering characteristics beyond standard fixed filters. Evaluate power consumption requirements against the available half-power mode options. Ensure the host system can support the required clock frequencies and interface protocols for configuration data loading.

Part Context

This part belongs to the AD7725 family of complete ADCs with integrated signal processing capabilities. It is designed for applications demanding precise analog-to-digital conversion combined with real-time digital filter adjustments. The device distinguishes itself through its programmable architecture compared to fixed-function converters.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

How is the digital filter response configured?

The filter response is programmed by loading a user-defined configuration file into the postprocessor via the parallel or serial interface. This file is typically generated using Analog Devices' Filter Wizard software.

What is the maximum master clock frequency supported?

The AD7725 supports a maximum master clock frequency (CLKIN) of 14.4 MHz. Operating at this speed typically requires the HALF_PWR pin to be set low.

Can the device operate with both single-ended and differential inputs?

Yes. The UNI pin selects the analog input range. A logic low selects bipolar operation supporting differential or single-ended inputs, while a logic high selects unipolar operation for single-ended inputs.