ADS1286PK

Overview

The ADS1286PK is a 12-bit analog-to-digital converter (ADC) from Texas Instruments, housed in an 8-pin PDIP package. It features a Successive Approximation Register (SAR) architecture with a differential input and integrated sample-and-hold amplifier. The device supports serial communication via SPI, I2C, or 3-wire interfaces. It operates on a single supply voltage ranging from 4.5 V to 5.25 V for both analog and digital domains. The ADC achieves a maximum sampling rate of 20 kS/s while consuming only 250 µA of supply current. Key performance metrics include a SINAD of 72 dB, DNL of ±0.75 LSB, and INL of ±2 LSB.

Feature Summary

• Integrates a high-precision 12-bit SAR ADC core with a built-in sample-and-hold amplifier for accurate signal capture.
• Supports flexible digital connectivity through standard serial interfaces including SPI, I2C, and 3-wire modes.
• Designed for ultra-low power consumption, drawing only 250 µA during operation to extend battery life in portable systems.
• Guarantees no missing codes across the full scale range, ensuring reliable data conversion integrity.

Applications

• Remote data acquisition systems requiring low-power sensor interfacing
• Industrial process control applications involving precision measurement
• Portable instrumentation devices where energy efficiency is critical

Procurement Notes

Verify that the specific suffix 'PK' corresponds to the 8-pin PDIP package variant when sourcing components. Ensure compatibility with the required operating temperature range of -40°C to +85°C for your application environment. Confirm that the external reference voltage requirements align with the device's specifications before integration into the design.

Selection Notes

Select this component when a balance between moderate resolution and very low power consumption is required. It is suitable for applications where the 20 kS/s speed is sufficient but power budget constraints are strict. Consider the PDIP package if through-hole mounting is necessary for mechanical stability or prototyping purposes.

Part Context

The ADS1286 belongs to a family of micro-power ADCs designed by Texas Instruments. While many devices in this series utilize delta-sigma architectures, the ADS1286 specifically employs a SAR structure. This distinction makes it unique within the portfolio for applications prioritizing speed and simplicity over the inherent noise-shaping benefits of delta-sigma converters.

Replacement Considerations

Direct substitutes may include other 12-bit SAR ADCs from Texas Instruments such as the ADS1286U or ADS1286UL variants, provided the package type difference is accounted for. Cross-reference pinouts and interface protocols to ensure functional equivalence without redesigning the PCB layout.