ADS1118IDGSR

Analog To Digital Converters (ADC) Overview

The ADS1118IDGSR is a precision, low-power 16-bit Delta-Sigma analog-to-digital converter (ADC) manufactured by Texas Instruments. It features an integrated multiplexer supporting four single-ended or two differential inputs, a programmable gain amplifier (PGA), and an internal voltage reference. The device operates on a supply voltage of 2V to 5.5V with a maximum sampling rate of 860 SPS. Key specifications include a typical power consumption of 150µA in continuous mode and a working temperature range of -40°C to +125°C. It utilizes an SPI interface for communication and is housed in a compact VSSOP-10 package.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a 16-bit Delta-Sigma ADC with a built-in multiplexer, programmable gain amplifier, and precision voltage reference.
• Supports flexible input configurations including four single-ended or two differential channels via the MUX.
• Includes a high-accuracy internal temperature sensor suitable for system monitoring or cold-junction compensation.
• Operates with ultra-low power consumption, featuring automatic power-down in single-shot mode.

Analog To Digital Converters (ADC) Applications

• Battery-powered sensor measurement systems requiring high resolution and low current draw.
• Industrial process control applications involving thermocouple or RTD signal conditioning.
• Portable medical devices and instrumentation where space constraints and precision are critical.
• Data acquisition systems utilizing SPI-compatible microcontrollers for environmental monitoring.

Analog To Digital Converters (ADC) Procurement Notes

Verify the component authenticity by checking the manufacturer's marking and lot code against official documentation. Confirm that the VSSOP-10 package matches the required PCB footprint dimensions. Ensure the operating voltage range aligns with the system's power supply rails. Check for moisture sensitivity level compliance if storage conditions exceed specified limits. Validate the SPI interface compatibility with the host controller's logic levels.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 16-bit resolution is necessary for precise signal acquisition in space-constrained designs. Consider the integrated PGA for amplifying small sensor signals without external components. Evaluate the power budget, as the 150µA active current and near-zero standby current suit battery-operated applications. Verify that the SPI interface speed meets the system's data throughput requirements up to the 860 SPS limit.

Analog To Digital Converters (ADC) Part Context

The ADS1118IDGSR belongs to the ADS1x18 family of ultra-small precision ADCs from Texas Instruments. This series is designed to replace larger discrete solutions by integrating the ADC, PGA, reference, and oscillator into a single chip. The IDGSR suffix indicates the specific VSSOP-10 package variant with industrial temperature rating and reel packaging for surface-mount assembly.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS1018 serves as a lower-resolution alternative within the same family. Cross-reference pinouts and register maps when substituting with other 16-bit SPI ADCs to ensure software compatibility. Verify that any replacement maintains the VSSOP-10 footprint or requires PCB redesign.