LTC2391HLX-16#PBF

Overview

The LTC2391HLX-16#PBF is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 5V supply and supports a ±4.096V fully differential input range. The device features a guaranteed 0.5% initial accuracy internal reference with a maximum temperature coefficient of ±20ppm/°C. Key performance metrics include a typical SNR of 94dB at a 20kHz input frequency, ±2LSB maximum integral nonlinearity, and no missing codes at 16 bits. Power consumption is 95mW at full throughput, with nap and sleep modes available for power reduction.

Feature Summary

• 16-bit resolution with 250ksps throughput rate
• ±4.096V fully differential input range on single 5V supply
• Internal precision reference: 4.096V output, ±20ppm/°C max tempco
• Parallel and serial interface modes with no cycle latency
• Operating temperature range: –40°C to 125°C

Applications

• Medical Imaging
• High Speed Data Acquisition
• Digital Signal Processing
• Industrial Process Control
• Instrumentation

Procurement Notes

Verify the specific ordering suffix HLX corresponds to the 48-lead LQFP package and the H grade for extended temperature operation (–40°C to 125°C). Confirm that the #PBF suffix indicates lead-free finish and tray packaging as specified in the manufacturer's order information table. Ensure compatibility with system voltage requirements for AVP, DVP, and OVP supplies before procurement.

Selection Notes

Select this component when high dynamic range and low noise are required for 16-bit applications. The internal oscillator simplifies timing design by eliminating external clock requirements. Consider the parallel interface for high-speed data bus integration or the serial mode for pin-count reduction. Verify that the 95mW power dissipation fits within the thermal budget of the 7mm x 7mm LQFP package at the maximum operating temperature.

Part Context

This part belongs to the LTC2391-16 family of low-noise, high-speed SAR ADCs. The 'H' designation identifies the industrial/high-temperature grade variant, distinct from the C (commercial) and I (industrial) grades which have narrower operating ranges. The LX suffix denotes the plastic LQFP package option, while UK denotes the QFN package. All variants share identical electrical specifications and pinouts.

Replacement Considerations

Direct replacements within the same family include LTC2391CLX-16#PBF (Commercial, 0°C to 70°C) and LTC2391ILX-16#PBF (Industrial, –40°C to 85°C). These parts are pin-compatible but differ in operating temperature limits. For higher throughput needs, consider the LTC2392-16 (500ksps) or LTC2393-16 (1Msps), which maintain similar interface and pin configurations.