PCA9691T/1,518

ADCs/DACs - Special Purpose Overview

The PCA9691T/1,518 is an 8-bit CMOS data acquisition device featuring four analog inputs and one analog output with a serial I2C-bus interface. It integrates an 8-bit successive approximation ADC and a multiplying DAC. The device supports up to 64 addresses via three hardware pins (A0, A1, A2) and operates on a single supply voltage ranging from 2.5 V to 5.5 V. It includes on-chip sample and hold circuits, auto-incremented channel selection, and low standby current capabilities.

ADCs/DACs - Special Purpose Feature Summary

• 8-bit successive approximation A/D conversion
• Four analog inputs programmable as single-ended or differential
• Multiplying Digital-to-Analog Converter (DAC) with one analog output
• 1 MHz Fast-mode Plus (Fm+) I2C-bus interface

ADCs/DACs - Special Purpose Applications

• Data acquisition systems requiring multi-channel input
• Industrial process control monitoring
• Battery-powered instrumentation due to low power consumption

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix '1,518' against official NXP documentation, as standard listings typically reference '1,512'. Confirm package type SOIC-16 and operating temperature range (-40°C to +85°C). Ensure compliance with RoHS standards and check for obsolescence status prior to procurement.

ADCs/DACs - Special Purpose Selection Notes

Select this component when an 8-bit resolution is sufficient for both analog input and output applications. The I2C interface requires pull-up resistors; ensure bus capacitance limits are respected for 1 MHz operation. Consider the SOIC-16 package dimensions if PCB space is constrained compared to TSSOP or HVQFN variants.

ADCs/DACs - Special Purpose Part Context

The PCA9691 series provides integrated A/D and D/A conversion in a single chip. The 'T' designation indicates the SOIC-16 plastic small outline package. This model belongs to the PCA9691 family, which allows multiple devices on a single I2C bus through configurable address pins.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same package include PCA9691TS (TSSOP-16) and PCA9691BS (HVQFN-16), though mechanical footprints differ. Verify electrical compatibility if substituting with other 8-bit ADC/DAC ICs.