ADC121S101CISD/NOPB

Analog To Digital Converters (ADC) Overview

The ADC121S101CISD/NOPB is a single-channel, 12-bit analog-to-digital converter (ADC) manufactured by Texas Instruments. It operates with a sampling rate of 1 MSPS and supports supply voltages from 2.7 V to 5.5 V. The device features an SPI-compatible serial interface and utilizes a SAR architecture. It is housed in a 6-pin SOT-23 package and functions within a temperature range of -40°C to +85°C. Key electrical parameters include a power consumption of 640 µW at full speed and a guaranteed monotonic output without missing codes.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 1 MSPS sampling rate
• Single-channel SAR architecture
• SPI-compatible 3-wire serial interface
• Low power consumption: 640 µW at 3.6V

Analog To Digital Converters (ADC) Applications

• Battery-powered instrumentation
• Industrial process control systems
• Portable medical devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix 'CISD' corresponds to the commercial temperature grade (-40°C to +85°C) and the SOT-23-6 package type. Ensure compatibility with existing PCB footprints for the thin SOT-23 form factor.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-channel, high-resolution conversion is required in a minimal footprint. It is suitable for designs needing low power dissipation under battery operation. Verify that the input voltage range aligns with the 2.7 V to 5.5 V supply requirements and that the system clock can support up to 30 MHz for the serial interface.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADC121S101 family of micro-power data converters. It serves as a direct replacement for older National Semiconductor parts like the ADC121S101CI. The NOPB suffix indicates lead-free construction and compliance with RoHS standards.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives within the same family include the ADC101S101 (10-bit) and ADC81S101 (8-bit). For higher channel counts, consider the ADC124S101 series. Verify that the thermal performance of the SOT-23 package meets the application's heat dissipation needs.