LTC1090ACN#PBF

ADCs/DACs - Special Purpose Overview

The LTC1090ACN#PBF is a single-chip 10-bit data acquisition system featuring a successive approximation A/D converter, an analog multiplexer, and a sample-and-hold circuit. It supports unipolar or bipolar conversions with up to four differential or eight single-ended inputs. The device operates on a single 5V, 10V, or ±5V supply and achieves a maximum throughput rate of 30kHz. Key electrical specifications include a conversion time of 22µs, a typical supply current of 1.0mA, and a total unadjusted error of ±1/2LSB for the AC grade. It utilizes a synchronous full-duplex serial interface compatible with standard microprocessor ports.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 10-bit SAR ADC with built-in sample-and-hold and 8-channel analog multiplexer
• Software-programmable for unipolar/bipolar modes, MSB/LSB first output, and variable word lengths (8, 10, 12, or 16 bits)
• Direct 4-wire serial interface compatibility with MPU serial and parallel ports
• Low power consumption with 1.0mA typical supply current at 5V operation

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data logging equipment with battery-powered constraints due to low current draw
• Microprocessor-based instrumentation interfaces
• Automotive sensor signal conditioning

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the package type is N Package (20-lead PDIP) as specified for this part number. Check for obsolescence status or alternative source recommendations from Analog Devices, as wider temperature range variants may be obsolete.

ADCs/DACs - Special Purpose Selection Notes

Select the LTC1090A variant if total unadjusted error must remain within ±1/2LSB across the operating temperature range. Ensure the application requires a maximum throughput of 30kHz, as higher speeds are not supported. Verify that the input voltage range aligns with the available supply voltages (5V, 10V, or ±5V) and reference voltage requirements.

ADCs/DACs - Special Purpose Part Context

The LTC1090 belongs to the LTC109x family of data acquisition components, which also includes models like the LTC1091, LTC1092, and LTC1093. These devices share similar architectures but vary in channel count and resolution. The LTC1090 specifically provides a cost-effective solution for applications needing 10-bit resolution with flexible input configuration options.

ADCs/DACs - Special Purpose Replacement Considerations

Consult Analog Devices marketing for parts with wider operating temperature ranges, as some older packages (SW, N) may have alternate sourcing considerations. Direct pin-compatible replacements should maintain the 10-bit resolution and serial interface protocol.