LTC1290BISW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1290BISW#PBF is a single-chip 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates an 8-channel analog multiplexer, a sample-and-hold circuit, and a successive approximation A/D converter. The device supports both unipolar and bipolar conversions with a maximum throughput rate of 50kHz. It operates on a single +5V supply or dual ±5V supplies, drawing 6.0mA. The component features a synchronous full-duplex four-wire serial interface compatible with industry standards, allowing direct connection to microprocessors. It is housed in a 20-lead SOIC Wide package and is rated for an operating temperature range of –40°C to 85°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution: Provides 12-bit accuracy with no missing codes guaranteed over the operating temperature range.
• 8-Channel Multiplexer: Configurable for four differential or eight single-ended inputs with an on-chip sample-and-hold for all single-ended channels.
• Software Programmable: Features include unipolar/bipolar conversion selection, MSB/LSB-first data output, variable word length (8, 12, or 16 bits), and power shutdown mode.
• Serial Interface: Direct four-wire interface to most MPU serial ports and parallel ports using standard synchronous full-duplex communication.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel signal acquisition.
• Data logging applications with moderate speed requirements up to 50ksps.
• Microprocessor-based measurement systems interfacing via SPI or Microwire protocols.
• Battery-powered instrumentation utilizing the power shutdown feature.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS3 conformity. Confirm the 'I' grade designation matches the required –40°C to 85°C industrial temperature range for the application environment. Ensure the SW package type corresponds to the PCB footprint design. Check current availability status as distribution may vary.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an integrated solution combining multiplexing, sampling, and 12-bit conversion is needed. Choose the BISW variant for industrial temperature ranges (-40°C to 85°C) and surface-mount assembly. Consider the 50kHz max throughput and 13µs max conversion time against system timing requirements. Verify that the 5V logic levels are compatible with the host microprocessor I/O voltages.

Analog To Digital Converters (ADC) Part Context

The LTC1290 belongs to the Linear Technology (now Analog Devices) family of single-chip data acquisition systems. It simplifies system design by integrating functions typically requiring separate ADC, MUX, and S/H components. The part number structure includes temperature grade (B/C/D/I/M), package code (SW/N/J), and termination option (#PBF).

Analog To Digital Converters (ADC) Replacement Considerations

LTC1290CISW#TRPBF: Same functional specifications but commercial temperature grade (0°C to 70°C). LTC1290DISW#TRPBF: Industrial temperature grade with tape and reel packaging instead of tube. Note that package variations do not alter electrical performance.