LTC1277ISW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1277ISW#PBF is a 12-bit, 100ksps successive approximation analog-to-digital converter in a 24-lead SO package. It features differential inputs and an internal 2.42V reference. The device operates from single 5V or ±5V supplies, consuming 10mW at full speed. It includes two power-down modes: Nap mode (180µA) with instant wake-up and Sleep mode (1µA). The output data format is a 2-byte read using straight binary for unipolar and offset binary for bipolar operation.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 100ksps sampling rate
• Differential input architecture with 2-byte parallel data output
• Internal 2.42V precision reference capable of being overdriven
• Low power consumption: 10mW active, 180µA Nap mode, 1µA Sleep mode

Analog To Digital Converters (ADC) Applications

• Battery-powered portable systems
• High-speed data acquisition for PCs
• Multiplexed data acquisition systems
• Audio and telecom processing
• Spectrum analysis

Analog To Digital Converters (ADC) Procurement Notes

Verify the ISW suffix indicates the industrial temperature range (-40°C to 85°C) compared to the CS commercial variant. Confirm the #PBF designation ensures lead-free compliance. Check current availability status as supply constraints may affect immediate fulfillment.

Analog To Digital Converters (ADC) Selection Notes

Select this model over the LTC1274 when differential input rejection is required. The LTC1277 provides a dedicated NAP pin for low-power standby, whereas the LTC1274 lacks this specific feature. Ensure the system supports the 2-byte serial read interface required by the LTC1277 architecture.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC1274/LTC1277 family of low-power, high-speed ADCs. The ISW variant specifies the industrial temperature grade within the standard plastic SO wide package. It shares core specifications like the 100ksps rate and 10mW power dissipation with its commercial counterpart.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1274CSW serves as a functional substitute if single-ended inputs are acceptable. Verify that the replacement part supports the required logic voltage levels and package dimensions for the existing PCB footprint.