AD7853LBR

Overview

The AD7853LBR is a 12-bit, single-channel Analog-to-Digital Converter (ADC) from Analog Devices Inc., optimized for low power consumption. It operates on a single 3 V to 5.5 V supply and supports a maximum throughput rate of 100 kSPS. The device features a pseudo-differential input range of 0 V to VREF or bipolar ±VREF/2, with an internal reference voltage of 2.5 V. Power dissipation is typically 4.5 mW at 3 V in normal mode and drops to 1.15 mW in power-down mode. It includes system and self-calibration capabilities that activate automatically upon power-up to maintain accuracy over temperature variations.

Feature Summary

• Low power optimization with automatic power-down after conversion
• Integrated self-calibration and system calibration functions
• Flexible serial interface compatible with SPI, QSPI, and microprocessor buses
• Pseudo-differential analog input architecture

Applications

• Battery-powered portable systems such as personal digital assistants
• Medical instrumentation devices
• Mobile communication equipment
• Pen computers and high-speed modems

Procurement Notes

Verify the specific suffix 'BR' corresponds to the 24-lead SSOP package variant when sourcing. Confirm the revision level matches the required specifications, as older revisions may have different thermal or electrical characteristics. Ensure the supplier provides valid traceability documentation for the component lot.

Selection Notes

Select the AD7853LBR over the standard AD7853 when lower power consumption is critical, as it offers reduced current draw at the cost of a lower maximum sampling rate of 100 kSPS compared to 200 kSPS. Verify that the 12-bit resolution meets the application's dynamic performance requirements, specifically checking SNR and THD specifications against the signal bandwidth needs.

Part Context

This component belongs to the AD7853 family of high-speed, low-power ADCs manufactured by Analog Devices Inc. The family includes variants optimized for speed (AD7853) and low power (AD7853L). The AD7853LBR specifically denotes the low-power version housed in a 24-lead Shrink Small Outline Package (SSOP), designed for space-constrained applications requiring efficient power management.

Replacement Considerations

The AD7853LBRZ is the lead-free RoHS-compliant equivalent of the AD7853LBR. Both parts share identical electrical specifications and pinouts. When replacing, ensure the new part number includes the appropriate environmental compliance suffix if required by the manufacturing process.