LTC1867IGN#PBF

Analog To Digital Converters (ADC) Overview

The LTC1867IGN#PBF is an 8-channel, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single 5V supply and supports sampling rates up to 200ksps. The device features an internal 2.5V reference with a 4.096V output at the REFCOMP pin, configurable for unipolar or bipolar input modes. It includes an automatic nap mode reducing current to 150µA between conversions and a sleep mode drawing only 0.2µA. The part is housed in a 16-lead narrow SSOP package and is qualified for automotive applications.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel multiplexer supporting single-ended or differential inputs
• Low power consumption with automatic nap and sleep modes
• On-chip precision internal voltage reference
• Automotive grade qualification

Analog To Digital Converters (ADC) Applications

• Industrial process control systems
• High-speed data acquisition
• Battery operated systems
• Multiplexed data acquisition systems
• Imaging systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel packaging. Confirm the IGN designation corresponds to the industrial temperature range of -40°C to 85°C. Ensure compatibility with AEC-Q100 requirements if used in automotive contexts. Check for any specific ordering restrictions or minimum order quantities directly with the manufacturer or authorized distributors.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high resolution and moderate speed are required in a compact form factor. The 16-bit resolution and ±2LSB INL make it suitable for precision measurements. Consider the internal reference limitations; use external references if tighter drift specifications are needed. Evaluate power constraints against the nap and sleep mode capabilities for battery-operated designs.

Analog To Digital Converters (ADC) Part Context

The LTC1867 is part of the LTC1863/LTC1867 family, offering pin-compatible 12-bit and 16-bit options. It shares the same 16-pin narrow SSOP package and serial interface as its counterparts. The family addresses applications requiring low power, small size, and multi-channel acquisition capabilities within a single integrated circuit solution.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1863IGN#PBF serves as a pin-compatible alternative with 12-bit resolution. For wider temperature ranges, consult the factory for extended grade versions. Automotive-specific variants include the #W suffix, such as the LTC1867IGN#WPBF, which meets stricter quality and reliability standards for automotive environments.

Analog To Digital Converters (ADC) FAQ

How does the automatic nap mode function?

The ADC enters automatic nap mode when CS/CONV is held high after a conversion completes. This reduces the operating current to approximately 150µA while keeping the reference voltages active until the next conversion cycle begins.

What is the wake-up time from sleep mode?

When the SLP bit is set to 1, the device enters sleep mode. Upon release, it requires a typical wake-up time of 60ms, assuming standard bypass capacitors are connected to the VREF and REFCOMP pins.

Can the internal reference be overdriven?

Yes, the internal reference can be overdriven by tying the VREF pin to GND and applying an external reference voltage to the REFCOMP pin. This allows for improved accuracy and lower drift using external precision references.