LTC1861CS8#PBF

Analog To Digital Converters (ADC) Overview

The LTC1861CS8#PBF is a 12-bit, 250ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead plastic SO package. It features a software-selectable 2-channel multiplexer and operates on a single 5V supply with a typical supply current of 850µA at maximum sampling rate. The device includes auto-shutdown capability, reducing supply current to approximately 2µA at 1ksps. It utilizes a 3-wire serial interface compatible with SPI/MICROWIRE standards. Key electrical specifications include a full power bandwidth of 20MHz, a signal-to-noise ratio of 72dB, and guaranteed operation within the commercial temperature range of 0°C to 70°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with 250ksps Sampling Rate
• Software-Selectable 2-Channel Multiplexer
• Single 5V Supply Operation with Auto Shutdown
• SPI/MICROWIRE Compatible Serial I/O

Analog To Digital Converters (ADC) Applications

• High Speed Data Acquisition Systems
• Portable or Compact Instrumentation
• Low Power Battery-Operated Instrumentation
• Isolated and/or Remote Data Acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and tube packaging for the SO-8 variant. Confirm the 'C' grade designation aligns with the required 0°C to 70°C operating temperature range for the target application environment.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 250ksps throughput are sufficient for the system requirements. The LTC1861 is appropriate for designs requiring two analog inputs that can be sampled sequentially via software control. Ensure the external reference voltage meets the 1V to VCC span requirement if using the MSOP version, though the SO-8 version ties VREF internally to VCC.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1860/LTC1861 family of micropower ADCs. It serves as the 2-channel counterpart to the single-channel LTC1860. The CS8#PBF designation specifically identifies the commercial grade (0°C to 70°C) version housed in an 8-lead Small Outline package with lead-free termination.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet lists the LTC1298 as a pin-compatible upgrade offering higher speed capabilities within the same package form factor.