ADUC7126BSTZ126I

Microcontrollers Overview

The ADUC7126BSTZ126I is a precision analog microcontroller featuring an ARM7TDMI core, 126 kB Flash/EE memory, and 32 kB SRAM. It integrates a 1 MSPS, 12-bit ADC with up to 16 channels and four 12-bit DACs. The device supports 41.78 MHz operation via an internal PLL or external clock. It includes dual I²C, SPI, and UART interfaces, plus GPIOs tolerant to 5 V. Operating from 2.7 V to 3.6 V, it functions within −40°C to +125°C in an 80-lead LQFP package.

Microcontrollers Feature Summary

• Integrates a 1 MSPS, 12-bit multichannel ADC supporting single-ended and differential modes with on-chip voltage reference and temperature sensor.
• Features four 12-bit voltage output DACs capable of retaining output during reset sequences, alongside a low drift band gap reference.
• Incorporates an ARM7TDMI MCU core with vectored interrupt controller supporting nested interrupts and nonintrusive JTAG emulation.
• Provides comprehensive digital peripherals including dual I²C, SPI with FIFO, dual UART with FIFO, PWM, and programmable logic array.

Microcontrollers Applications

• Industrial control and automation systems
• Smart sensors and precision instrumentation
• Base station systems and optical networking
• Patient monitoring equipment

Microcontrollers Procurement Notes

Verify the specific suffix 'I' indicates industrial temperature range compliance (-40°C to +125°C) as per the manufacturer's ordering guide. Confirm the 80-lead LQFP package dimensions match your PCB footprint requirements. Ensure power supply decoupling meets the specified AVDD and IOVDD recommendations for stable 1 MSPS ADC performance.

Microcontrollers Selection Notes

Select this component when high-speed data acquisition is required alongside complex processing capabilities. The integrated 12-bit ADC and DAC reduce external component count compared to discrete solutions. Consider the 5 V tolerant GPIOs for interfacing with legacy logic levels without additional level shifters. Evaluate the available Flash memory size against application code requirements.

Microcontrollers Part Context

This part belongs to the Analog Devices MicroConverter family, combining analog signal chain and digital control on a single chip. It shares the core architecture with the ADuC7124 but offers increased pin count via the 80-lead LQFP package. The series is designed for applications requiring precise analog measurement and control in harsh environments.

Microcontrollers Replacement Considerations

The ADuC7124 serves as a functional alternative with identical specifications but utilizes a 64-lead LFCSP package. Verify pin compatibility and board layout changes if substituting between these variants. No other direct cross-model replacements are documented in the official datasheet.