LTC1290DCSW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1290DCSW#PBF is a single-chip 12-bit data acquisition system featuring an 8-channel analog multiplexer, sample-and-hold circuit, and successive approximation A/D converter. It operates on a single 5V supply or ±5V dual supplies with a maximum throughput of 50kHz. The device supports unipolar (12-bit) or bipolar (11-bit plus sign) conversions via software configuration. Serial I/O interfaces directly with microprocessors using standard full-duplex protocols, allowing selectable MSB/LSB-first output and variable word lengths of 8, 12, or 16 bits. It includes power shutdown capability for low-power applications.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 8-channel input multiplexer supporting single-ended or differential configurations
• Software-programmable unipolar/bipolar conversion modes and variable output word length (8/12/16 bits)
• Direct four-wire serial interface compatible with industry-standard MPU ports (SPI, Microwire)
• Low supply current of 6.0mA typical; power shutdown mode reduces consumption significantly

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel signal conditioning
• Data logging equipment with microprocessor-based architectures
• Portable instrumentation utilizing single-supply operation
• Automotive sensor interface circuits

Analog To Digital Converters (ADC) Procurement Notes

Verify the suffix #PBF indicates lead-free compliance per RoHS standards. Confirm the DC grade specifies an operating temperature range of 0°C to 70°C. Ensure the SW package designation matches the required 20-lead plastic SO Wide footprint. Cross-reference ordering part numbers with Linear Technology documentation for tape and reel availability if automated assembly is needed.

Analog To Digital Converters (ADC) Selection Notes

Select this component when 12-bit accuracy across eight channels is required within a compact single-chip solution. Choose the DC grade for commercial temperature ranges; use DI grades for industrial (-40°C to 85°C) requirements. Verify that the 50kHz maximum throughput meets system sampling needs. Ensure the serial interface timing parameters align with the host microprocessor's clock speeds and setup/hold times.

Analog To Digital Converters (ADC) Part Context

The LTC1290 belongs to the Linear Technology data acquisition family, utilizing LTCMOS switched capacitor technology. It integrates functions typically found in discrete designs, including the mux, S/H, and SAR ADC. The DC variant represents the commercial temperature grade version of the device, distinct from the BI (industrial) and BM (military) grades available in the series.

Analog To Digital Converters (ADC) Replacement Considerations

Public datasheets list the N package (20-lead PDIP) as an alternate source for the same electrical specifications. No other specific cross-model substitutes are documented in the provided text. Verify pinout compatibility and thermal characteristics when substituting packages.