ADS1286UB

Overview

The ADS1286UB is a 12-bit micro-power sampling analog-to-digital converter (ADC) manufactured by Burr-Brown, now part of Texas Instruments. It features a Successive Approximation Register (SAR) architecture with a single differential input channel. The device operates on a supply voltage range of 4.5 V to 5.25 V for both analog and digital domains. Key electrical specifications include a maximum sampling rate of 20 kS/s, a power consumption of 1.25 mW, and a Signal-to-Noise and Distortion Ratio (SINAD) of 72 dB. Non-linearity performance is characterized by a Differential Non-Linearity (DNL) of ±0.75 LSB and an Integral Non-Linearity (INL) of ±2 LSB.

Feature Summary

• 12-bit resolution with SAR structure
• Micro-power operation at 1.25 mW
• Single-channel differential input
• Supports SPI, I2C, and 3-wire interfaces

Applications

• Portable battery-powered instrumentation
• Industrial process control systems
• Data acquisition modules

Procurement Notes

Verify the manufacturer designation as Burr-Brown or Texas Instruments, as production was transferred. Confirm the package type is SOIC-8 and the operating temperature range is -40°C to +85°C. Check for suffix variations such as G4 which indicate lead-free compliance. Ensure the interface configuration matches the specific system requirements for SPI or I2C communication.

Selection Notes

Select this component when a low-pin-count solution is required for single-channel applications. The 8-SOIC package minimizes board space compared to larger ADC packages. Verify that the 12-bit resolution and 20 kS/s speed meet the system bandwidth needs. Ensure the external reference voltage capability aligns with the application's accuracy requirements.

Part Context

The ADS1286UB belongs to the ADS1286 family of high-performance ADCs. While higher-end models in the series offer more channels and bits, this specific part provides a cost-effective option for simpler data acquisition tasks. It serves as a bridge between basic 8-bit converters and complex multi-channel delta-sigma ADCs.

Replacement Considerations

Cross-reference with ADS1286UB/2K5 for reel packaging variants. Consider ADS1286UBG4 for RoHS-compliant versions. Verify pin compatibility if substituting with other 12-bit SAR ADCs in SOIC-8 packages.