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AMC6821SDBQR

TIAMC6821SDBQR

Texas Instruments
Temperature Monitor -40°C ~ 125°C Internal and External Sensor SMBus Output 16-SSOP
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Overview

The AMC6821SDBQR is an intelligent system monitor and PWM fan controller featuring an 11-bit sigma-delta ADC for high-precision thermal management. It integrates both an internal temperature sensor and a remote diode input to monitor critical components while managing cooling via a dedicated PWM output. Operating from a 2.7V to 5.5V supply, the device supports SMBus and I2C interfaces for seamless integration into host-controlled systems.

Why Choose This Part

This controller offers a highly integrated solution by combining temperature monitoring, alarm logic, and PWM generation into a single 16-SSOP package. It features a ultra-low 1uA sleep mode and a 0.1uA standby current, making it ideal for energy-sensitive designs where thermal management is only required periodically.

Applications

Server and Computing Thermal Management
Regulates processor and chassis fan speeds based on real-time temperature data from local and remote sensors.
Automotive Infotainment
The Q1 variant provides reliable cooling control for head units and digital clusters in high-temperature environments.
Industrial Power Supplies
Monitors internal ambient temperatures and controls active cooling to maintain efficiency and component longevity.
Networking Infrastructure
Provides automated fan speed control for switches and routers to minimize acoustic noise and power consumption.

Key Specifications

Accuracy +/-3degC
Function Temperature Monitor
Topology ADC (Sigma Delta), Comparator, Fan Control, Multiplexer, Register Bank
Output Fan Yes
Output Type SMBus
Sensor Type Internal and External
Output Alarm Yes
Mounting Type Surface Mount
Package / Case 16-SSOP (0.154", 3.90mm Width)
Voltage - Supply 2.7V ~ 5.5V
Sensing Temperature -40degC ~ 125degC
Operating Temperature -40degC ~ 125degC
Supplier Device Package 16-SSOP

Getting Started

Development begins by interfacing the device via its SMBus/I2C pins to a microcontroller for register configuration. Engineers should use the provided 11-bit ADC data to tune PID or lookup-table-based fan curves, ensuring the PWM output is connected to the control pin of a 3-wire or 4-wire DC fan. Evaluation can be expedited using an I2C-compatible bridge and the manufacturer's software tools for register mapping.

Also Consider

ADT7470 ONonsemi - Offers four fan control channels and ten temperature monitor inputs for high-density server applications.
EMC2101 MCHPMicrochip Technology - Provides a smaller 8-MSOP footprint for space-constrained fan control applications.