ADT7476AARQZ-REEL7 datasheet(10/72 Pages) AD

部件名	ADT7476AARQZ-REEL7

功能描述	dBCool Remote Thermal Controller and Voltage Monitor

Download	72 Pages

Scroll/Zoom	100%

制造商	AD [Analog Devices]

网页	http://www.analog.com

标志

10 / 72 page

ADT7476A

Rev. 0 | Page 10 of 72

PRODUCT DESCRIPTION

The ADT7476A is a complete thermal monitor and multiple fan

controller for any system requiring thermal monitoring and

cooling. The device communicates with the system via a serial

system management bus. The serial bus controller has a serial

data line for reading and writing addresses and data (Pin 1),

and an input line for the serial clock (Pin 2). All control and

programming functions for the ADT7476A are performed over

the serial bus. In addition, a pin can be reconfigured as an

SMBALERT output to signal out-of-limit conditions.

FEATURE COMPARISONS BETWEEN ADT7476A

AND ADT7468

•

Dynamic TMIN , dynamic operating point, and associated

registers are no longer available in the ADT7476A. The

following related registers are gone:

o

Calibration Control 1 (0x36)

o

Calibration Control 2 (0x37)

o

Operating Point (0x33, 0x34, and 0x35)

•

Previously (in the ADT7468), TRANGE defined the slope of

the automatic fan control algorithm. TRANGE now defines a

true temperature range (in the ADT7476A).

•

Acoustic filtering is now assigned to temperature zones,

not to fans. Available smoothing times have been increased

for better acoustic performance.

•

Temperature measurements are now made with two

switching currents instead of three. SRC is not available in

the ADT7476A.

•

High frequency PWM can now be enabled/disabled on

each PWM output individually.

•

THERM can now be enabled/disabled on each temperature

channel individually.

•

The ADT7476A does not support full shutdown mode.

•

The ADT7476A offers increased temperature accuracy on

all temperature channels.

•

The ADT7476A defaults to twos complement temperature

measurement mode.

•

Some pins have swapped/added functions.

•

The power-up routine for the ADT7476A is simplified.

•

The ADT7476A has a higher maximum input voltage

TACH/PWM spec, supporting a wider range of fans.

•

VCORE_LOW_ENABLE has been reallocated to Bit 7 of

Configuration Register 1 (0x40).

RECOMMENDED IMPLEMENTATION

Configuring the ADT7476A as shown in Figure 13 allows the

system designer to use the following features:

•

Two PWM outputs for fan control of up to three fans (the

front and rear chassis fans are connected in parallel).

•

Three TACH fan speed measurement inputs.

•

VCC measured internally through Pin 4.

•

CPU temperature measured using Remote 1 temperature

channel.

•

Remote temperature zone measured through Remote 2

temperature channel.

•

Local temperature zone measured through the internal

temperature channel.

•

Bidirectional THERM pin. This feature allows Intel

Pentium 4 PROCHOT monitoring and can function as an

overtemperature THERM output. It can alternatively be

programmed as an SMBALERT system interrupt output.

类似零件编号 - ADT7476AARQZ-REEL7

制造商	部件名	数据表	功能描述
ON Semiconductor	ADT7476AARQZ-R	613Kb / 67P	dBCOOL Remote Thermal Controller and Voltage Monitor May, 2010 ??Rev. 3
	ADT7476AARQZ-R	541Kb / 69P	Remote Thermal Controller and Voltage Monitor February, 2016 ??Rev. 7
	ADT7476AARQZ-RL7	613Kb / 67P	dBCOOL Remote Thermal Controller and Voltage Monitor May, 2010 ??Rev. 3

More results

类似说明 - ADT7476AARQZ-REEL7

制造商	部件名	数据表	功能描述
Analog Devices	ADT7476	1Mb / 72P	dBCool Remote Thermal Controller and Voltage Monitor REV. A
Analog Devices	ADT7468	1,021Kb / 80P	dBCool??Remote Thermal Controller and Voltage Monitor REV. 0
ON Semiconductor	ADT7476A	613Kb / 67P	dBCOOL Remote Thermal Controller and Voltage Monitor May, 2010 ??Rev. 3
	ADM1027	1Mb / 56P	dBCOOL??Remote Thermal Controller and Voltage Monitor May 2010 - Rev. 3
	ADT7476	620Kb / 67P	dBCOOL Remote Thermal Controller and Voltage Monitor May, 2010 ??Rev. 6
Analog Devices	ADT7466	1Mb / 48P	dBCool Remote Thermal Controller and Voltage Monitor REV. 0
	ADM1027	1,008Kb / 56P	dBCOOL-TM Remote Thermal Controller and Voltage Monitor REV. A
	ADT7467	1Mb / 80P	dBCool Remote Thermal Monitor and Fan Controller REV. 0
ON Semiconductor	ADT7475_1110	639Kb / 58P	dbCOOL Remote Thermal Monitor and Fan Controller October, 2011 ??Rev. 5
Analog Devices	ADT7473	1Mb / 76P	dBCool Remote Thermal Monitor and Fan Controller REV. A