ADM1034ARQZ-REEL(2012) Просмотр технического описания (PDF) - ON Semiconductor

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производитель

ADM1034ARQZ-REEL
(Rev.:2012)

Thermal Monitor and Fan Speed (RPM) Controller

ON Semiconductor 

ADM1034

Table 2. THERMAL CHARACTERISTICS

Package Type

16-lead QSOP Package

qJA

qJC

Unit

150

39

C/W

Table 3. PIN ASSIGNMENT

Pin No.

Mnemonic

1

DRIVE1

2

TACH1

3

DRIVE2

4

TACH2

5

GND

6

VCC

7

THERM

8

FAN_FAULT/REF

9

D1−

10

D1+

11

D2−

12

D2+

13

LOCATION

14

ALERT

15

SDA

16

SCL

Description

DRIVE1 Pin Drives Fan 1. Open-drain output. Requires a pullup resistor.

Fan 1 Fan Speed Measurement Input. Connects to the fan’s TACH output to measure the fan

speed.

DRIVE2 Pin Drives Fan 2. Open-drain output. Requires a pullup resistor.

Fan 2 Fan Speed Measurement Input. Connects to the fan’s TACH output to measure the fan

speed.

Ground for Analog and Digital Circuitry.

Power. Can be powered by 3.3 V standby power if monitoring in low power states is required.

Can be configured as an overtemperature interrupt output, or as an input (to monitor PROCHOT

output of an INTEL CPU). A timer measures assertion times on the THERM pin (either input or

output).

FAN_FAULT: Open-Drain Output. Asserted low when one or both fans stall. Requires a pullup

resistor to VCC. REF: Analog Input Reference for the THERM Input.

Cathode Connection for the First Thermal Diode or Diode-Connected Transistor.

Anode Connection for the First Thermal Diode or Diode-Connected Transistor.

Cathode Connection for the Second Thermal Diode or Diode-Connected Transistor.

Anode Connection for the Second Thermal Diode or Diode-Connected Transistor.

8-level Analog Input. Used to determine the correct SMBus version and the SMBus address (in

fixed and discoverable mode) and to set the LLL bits in the UDID (in ARP-capable mode).

Open-Drain Output. SMBusALERT pin. Alerts the system in the case of out-of-limit events, such

as over temperature. Can be configured as sticky SMBus mode or comparator mode.

Serial Bus Bidirectional Data. Connects to the SMBus master’s data line. Requires pullup resistor

if not provided elsewhere in the system.

Serial SMBus Clock Input. Connects to the SMBus master’s clock line. Requires pullup resistor if

not already provided in the system.

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