LTC1867CGN#PBF

Analog To Digital Converters (ADC) Overview

The LTC1867CGN#PBF is an 8-channel, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) operating at a sampling rate of 200ksps. It features a single-ended or differential input multiplexer with unipolar or bipolar conversion modes. The device operates on a single 5V supply and includes an internal 2.5V reference. Key electrical parameters include a maximum integral nonlinearity error of ±2LSB, no missing codes, and a typical signal-to-noise ratio of 89dB. Supply current is 1.3mA at 200ksps, reducing to 150µA in automatic nap mode. It utilizes SPI/Microwire serial I/O and is housed in a 16-lead narrow SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel analog input multiplexer supporting single-ended and differential configurations
• Low power consumption with automatic nap mode between conversions
• On-chip precision internal voltage reference
• SPI/Microwire compatible serial digital interface

Analog To Digital Converters (ADC) Applications

• Industrial process control systems
• High-speed data acquisition applications
• Battery-operated portable equipment
• Multiplexed data acquisition architectures
• Imaging systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging. Confirm the CGN designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure compatibility with automotive requirements if applicable, as standard versions differ from AEC-Q100 qualified variants.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high resolution and moderate speed within a compact footprint. Consider the internal reference limitations; external references may be necessary for superior drift performance. Evaluate channel count needs against the fixed 8-channel architecture.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1863/LTC1867 family of pin-compatible ADCs. The LTC1867 offers 16-bit resolution compared to the 12-bit LTC1863. Both share identical pinouts and functionality, differing primarily in resolution and linearity specifications.

Analog To Digital Converters (ADC) Replacement Considerations

LTC1867IGN#PBF provides the same electrical characteristics but supports an extended industrial temperature range of -40°C to 85°C.

Analog To Digital Converters (ADC) FAQ

How does the automatic nap mode function?

The device enters automatic nap mode when CS/CONV is held high after a conversion completes, reducing supply current to approximately 150µA while maintaining active reference voltages.

What is the wake-up time from sleep mode?

Upon exiting sleep mode, the ADC requires approximately 60ms to stabilize, assuming proper bypass capacitors are connected to VREF and REFCOMP.

Can the internal reference be overridden?

Yes, the internal reference can be overdriven by connecting an external reference to the VREF pin, which disables the internal bandgap source.