C8051F351-GMR

Overview

The C8051F351-GMR is an analog-intensive mixed-signal microcontroller from Silicon Labs, featuring a high-speed 8051 core operating at up to 50 MHz. It integrates 8 kB of in-system programmable Flash memory and 768 bytes of RAM within a 28-pin QFN package. Key peripherals include a 24-bit sigma-delta ADC with eight input channels and a programmable gain amplifier, two 8-bit current-output DACs, and a low-current comparator. The device supports enhanced UART, SMBus, and SPI interfaces, along with four 16-bit timers and a programmable counter array.

Feature Summary

• Integrates a 24-bit sigma-delta ADC subsystem with an 8-input multiplexer and programmable gain stage for high-resolution signal acquisition.
• Includes two 8-bit current-output digital-to-analog converters (DACs) for precise analog control applications.
• Features on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Provides comprehensive power management capabilities including idle and stop modes with ultra-low standby currents.

Applications

• Portable medical equipment requiring high-precision analog measurement
• Industrial weigh scales utilizing the high-resolution ADC
• Test equipment needing accurate data conversion and processing
• Fiber optic systems demanding reliable mixed-signal control

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the ordering suffix corresponds to the tape-and-reel packaging format required for automated assembly processes. Ensure compliance with RoHS and REACH regulations as specified in the manufacturer documentation. Validate that the specific revision matches the design requirements before final procurement.

Selection Notes

Select this variant when a 24-bit ADC resolution is mandatory for the application. Consider the 28-pin QFN footprint constraints during PCB layout planning. Evaluate the 5 V tolerant I/O capability if interfacing with higher voltage logic levels is necessary. Compare against other C8051F35x family members if different ADC resolutions or package types better suit the system architecture.

Part Context

This component belongs to the C8051F35x family of fully integrated mixed-signal microcontrollers. These devices are designed as standalone system-on-chip solutions, combining a fast 8051 CPU with extensive analog and digital peripherals. The family shares common architectural features but varies in ADC resolution and package options to address diverse embedded control needs.

Replacement Considerations

C8051F351-GM is the tube-packaged equivalent of this reel-delivered part. Other family members like C8051F350, F352, and F353 offer similar functionality but may differ in ADC resolution or package type. Verify pin compatibility and peripheral specifications before substituting.