AD7853LBR-REEL

Overview

The AD7853LBR-REEL is a low-power, 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices. 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 straight binary or two's complement output coding. It includes an internal track-and-hold amplifier that acquires signals in 400 ns. Power consumption is optimized for battery applications, drawing typically 1.9 mA at 5 V and 1.5 mA at 3 V in normal mode. The part integrates system and self-calibration capabilities with automatic power-up calibration.

Feature Summary

• Low power optimization with automatic power-down after conversion
• Integrated self-calibration and system calibration functions
• Flexible serial interface compatible with standard microprocessor protocols
• Pseudo-differential sampling scheme with wide analog input range

Applications

• Battery-powered portable systems such as personal digital assistants
• Medical instrumentation requiring high accuracy and low power
• Mobile communications equipment
• Pen computers and handheld data acquisition devices

Procurement Notes

Verify the specific suffix BR indicates the SOIC package variant when sourcing. Confirm the REEL designation matches required tape and reel specifications for automated assembly processes. Ensure the component grade aligns with the intended operating temperature range requirements for the final application design.

Selection Notes

Select this model over the standard AD7853 when lower power dissipation is critical, as it offers reduced current draw at the cost of lower maximum sampling speed. Verify that the 100 kSPS throughput meets the signal bandwidth requirements. Check compatibility with available serial clock frequencies and ensure the 24-lead SSOP footprint fits the PCB layout constraints.

Part Context

This component belongs to the AD7853 family of 12-bit sampling ADCs. The L suffix denotes the low-power variant optimized for extended battery life compared to the standard speed-optimized version. The family shares identical pinouts and register structures, allowing for potential design flexibility between speed and power requirements within the same package options.

Replacement Considerations

Direct functional substitutes include the AD7853ARZ for higher speed applications if power constraints are relaxed. For legacy DIP packages, the AD7853LAN is available but requires voltage level translation verification. Cross-vendor replacements require careful evaluation of serial interface timing and reference input characteristics.