LTC1277CSW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1277CSW#PBF is a 12-bit successive approximation analog-to-digital converter (ADC) housed in a 24-lead plastic SO wide package. It operates from a single 5V supply or ±5V supplies, supporting unipolar (0V to 4.096V) and bipolar (±2.048V) input ranges. The device features a differential input architecture with a two-byte read format. Key electrical parameters include a maximum sampling rate of 100ksps, typical power dissipation of 10mW at full speed, and an internal 2.42V reference. It offers low-power modes: Nap mode draws 180µA with instant wake-up, while Sleep mode reduces current to 1µA.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with differential inputs and offset binary data format
• 100ksps sampling rate with 10mW typical power consumption
• Nap mode (180µA) and Sleep mode (1µA) for power optimization
• Internal 2.42V reference with overdrive capability

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS status against the manufacturer's current documentation. Confirm the commercial temperature range (0°C to 70°C) aligns with system requirements. Ensure the 24-lead SO wide package dimensions match the PCB footprint design constraints.

Analog To Digital Converters (ADC) Selection Notes

Select this component when differential input rejection is required compared to the single-ended LTC1274. The LTC1277 supports both 5V and 3V logic interfaces via the VLOGIC pin, offering flexibility for lower voltage processors. Consider the 2-byte read interface timing if interfacing with microcontrollers that require separate high and low byte access.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1274/LTC1277 family of low-power, 12-bit ADCs. While the LTC1274 provides single-ended inputs and parallel data, the LTC1277 variant specifically adds differential inputs and a two-byte read capability. Both share the same core SAR architecture, internal clock, and power management features within the 24-lead SO package.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.