Specification	AMC6821SDBQR

Accuracy	3 °C
Function	Temperature Monitor
Mounting Type	Surface Mount
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Alarm	True
Output Fan	True
Output Type	SMBus
Package / Case	0.154 in
Package / Case	16-SSOP
Package / Case	3.9 mm
Sensing Temperature [Max]	125 °C
Sensing Temperature [Min]	-40 °C
Sensor Type	Internal and External
Supplier Device Package	16-SSOP
Topology	Comparator, Multiplexer, Fan Control, ADC (Sigma Delta), Register Bank
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.7 V

AMC6821-Q1 Series

Automotive remote and local temp sensor with automatic fan speed control and fault detection

Part	Sensing Range [Min]	Sensing Range [Max]	Sensitivity	Supplied Contents	Sensor Type	Utilized IC / Part	Interface	Voltage - Supply [Min]	Voltage - Supply [Max]	Package / Case	Package / Case	Package / Case	Sensing Temperature [Max]	Sensing Temperature [Min]	Accuracy	Function	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Supplier Device Package	Topology	Grade	Qualification
Texas Instruments AMC6821EVM-PDK	-25 °C	100 °C	1 °C	Board(s)	Fan Controller Temperature	AMC6821	I2C SMBus	2.7 V	5.5 V
Texas Instruments AMC6821SDBQ					Internal and External			2.7 V	5.5 V	0.154 in	16-SSOP	3.9 mm	125 °C	-40 °C	2 °C	Temperature Monitor	SMBus	125 °C	-40 °C	Surface Mount	16-SSOP	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank
Texas Instruments AMC6821SQDBQRQ1					Internal and External			2.7 V	5.5 V	0.154 in	16-SSOP	3.9 mm	125 °C	-40 °C	2 °C	Temperature Monitor	SMBus	125 °C	-40 °C	Surface Mount	16-SSOP	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank	Automotive	AEC-Q100
Texas Instruments AMC6821EVM	-25 °C	100 °C	1 °C	Board(s)	Fan Controller Temperature	AMC6821	I2C SMBus	2.7 V	5.5 V
Texas Instruments AMC6821SDBQRG4					Internal and External			2.7 V	5.5 V	0.154 in	16-SSOP	3.9 mm	125 °C	-40 °C	2 °C	Temperature Monitor	SMBus	125 °C	-40 °C	Surface Mount	16-SSOP	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank
Texas Instruments AMC6821SDBQR					Internal and External			2.7 V	5.5 V	0.154 in	16-SSOP	3.9 mm	125 °C	-40 °C	3 °C	Temperature Monitor	SMBus	125 °C	-40 °C	Surface Mount	16-SSOP	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 4.01
		10	$ 3.01
		25	$ 2.67
		50	$ 2.54
		100	$ 2.47
		500	$ 2.07
		1000	$ 1.94
	Digi-Reel®	1	$ 4.01
		10	$ 3.01
		25	$ 2.67
		50	$ 2.54
		100	$ 2.47
		500	$ 2.07
		1000	$ 1.94
	Tape & Reel (TR)	2500	$ 1.87
		5000	$ 1.80
Texas Instruments	LARGE T&R	1	$ 2.47
		100	$ 2.17
		250	$ 1.52
		1000	$ 1.22

Description

General part information

AMC6821-Q1 Series

The AMC6821-Q1 is an intelligent temperature monitor and pulse-width modulation (PWM) fan controller. It is designed for noise-sensitive or power-sensitive applications that require active system cooling. Using either a low-frequency or a high-frequency PWM signal, this device can simultaneously drive a fan, monitor remote sensor diode temperatures, and measure and control the fan speed so that it operates with minimal acoustic noise at the lowest possible speed.

The AMC6821-Q1 has three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode. Each mode controls the fan speed by changing the duty cycle of a PWM output. Auto Temperature-Fan mode is an intelligent, closed-loop control that optimizes fan speed according to user-defined parameters. This mode allows the AMC6821-Q1 to run as a stand-alone device without CPU intervention; the fan can continue to be controlled (based on temperature measurements) even if the CPU or system locks up. Software-RPM mode is a second closed-loop control. In this mode, the AMC6821-Q1 adjusts the PWM output to maintain a consistent fan speed at a user-specified target value; that is, the device functions as a fan speed regulator. Software-RPM mode can also be used to allow the AMC6821-Q1 to operate as a stand-alone device. The third mode, Software-DCY, is open-loop. In Software-DCY mode, the PWM duty cycle is set directly by the value written to the device.

The AMC6821-Q1 has a programmableSMBALERToutput to indicate error conditions and a dedicatedFAN-FAULToutput to indicate fan failure. TheTHERMpin is a fail-safe output for over-temperature conditions that can be used to throttle a CPU clock. Additionally, theOVRpin indicates the over-temperature limit as well. All of the alarm thresholds are set through the device registers. The AMC6821-Q1 is available in a SSOP-16 package.

Documents

Technical documentation and resources

Intelligent Temperature Monitor and PWM Fan Controller datasheet (Rev. C)

Data sheet