AD7853LBNZ

Overview

The AD7853LBNZ is a 12-bit, 100 kSPS sampling analog-to-digital converter (ADC) from Analog Devices. It operates on a single 3 V to 5.5 V supply and features low power consumption of typically 6.85 mW at 3 V. The device includes an internal 2.5 V reference, self-calibration, and system calibration capabilities with autocalibration on power-up. It supports flexible serial interfaces compatible with SPI, QSPI, and 8051 microprocessors. The part is housed in a 24-lead Plastic DIP package.

Feature Summary

• Low power optimized version with automatic power-down after conversion
• Integrated self-calibration and system calibration for accuracy over temperature
• Flexible serial interface supporting multiple standard protocols
• Pseudo-differential input sampling scheme with track-and-hold

Applications

• Battery-powered systems such as personal digital assistants and mobile communications
• Medical instruments requiring low power and high accuracy
• Pen computers and portable instrumentation
• High-speed modems and industrial control systems

Procurement Notes

Verify the specific grade and package suffix against the ordering guide to ensure compatibility with design requirements. Confirm that the 24-lead DIP package meets mechanical constraints. Check for any end-of-life notices or alternative recommendations from the manufacturer before finalizing procurement plans.

Selection Notes

Select the AD7853LBNZ when lower power consumption is prioritized over maximum throughput compared to the standard AD7853. Ensure the application requires a 100 kSPS rate rather than 200 kSPS. Verify that the 24-lead DIP package fits the PCB layout and that the 3 V to 5.5 V supply range matches the system voltage.

Part Context

The AD7853LBNZ belongs to the AD7853 family of 12-bit sampling ADCs. It is the low-power variant of the AD7853, optimized for reduced current consumption while maintaining similar functionality. The 'B' denotes the B-grade linearity specification, and 'NZ' indicates a lead-free RoHS-compliant plastic DIP package.

Replacement Considerations

The AD7853AN or AD7853BN may be used if higher speed (200 kSPS) is acceptable and power consumption is less critical. For pin-compatible alternatives with different performance characteristics, consult the Analog Devices data converter selection guide.