ADC121S625CIMM

Analog To Digital Converters (ADC) Overview

The ADC121S625 is a 12-bit, 50 ksps to 200 ksps sampling Analog-to-Digital Converter (ADC) featuring true differential inputs and an external reference. It operates from a single +5V supply with typical active power consumption of 2.25 mW at 200 ksps and 60 nW in power-down mode. The device utilizes a SAR architecture and provides binary 2's complement output via a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Key electrical characteristics include ±1 LSB max INL, ±0.75 LSB max DNL, and a typical CMRR of 82 dB. It is available in an 8-lead VSSOP package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with sample rates from 50 ksps to 200 ksps
• True differential analog inputs (+IN, -IN)
• External reference voltage range: 100mV to 2.5V
• SPI/QSPI/MICROWIRE/DSP compatible serial interface
• Low power: 2.25 mW active (200 ksps), 60 nW power-down

Analog To Digital Converters (ADC) Applications

• Automotive navigation systems
• Portable battery-operated systems
• Medical instruments
• Instrumentation and control systems
• Motor control applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product folder to confirm package type and temperature grade. Ensure the component source matches Texas Instruments specifications for production data validity. Check for any recent revisions to the datasheet that may affect pin compatibility or electrical limits compared to older batches.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and up to 200 ksps throughput are required with low power consumption. It serves as a pin-compatible replacement for the ADS7817. Ensure the application can provide an external reference voltage between 100mV and 2.5V. Verify that the system clock frequency falls within the 800 kHz to 3.2 MHz range for proper operation.

Analog To Digital Converters (ADC) Part Context

The ADC121S625 is part of Texas Instruments' family of micro-power sampling A/D converters. It is designed as a superior pin-compatible replacement for the ADS7817. The device is manufactured using a SAR architecture optimized for low power and high impedance inputs, making it suitable for direct transducer connection in remote data acquisition applications.

Analog To Digital Converters (ADC) Replacement Considerations

The ADC121S625 is explicitly documented as a pin-compatible superior replacement for the ADS7817. Designers replacing the ADS7817 should verify that the external reference and clock requirements align with the ADC121S625 specifications.