ADM1034ARQ-REEL Просмотр технического описания (PDF) - Analog Devices

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ADM1034ARQ-REEL

Thermal Monitor and Fan Speed (RPM) Controller

Analog Devices 

ADM1034

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

DRIVE1 1

TACH1 2

DRIVE2 3

TACH2 4

GND 5

VCC 6

THERM 7

FAN_FAULT/REF 8

16 SCL

15 SDA

ADM1034

TOP VIEW

(Not to Scale)

14 ALERT

13 LOCATION

12 D2+

11 D2–

10 D1+

9 D1–

Figure 3. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Mnemonic

Description

1

DRIVE1

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

2

TACH1

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

3

DRIVE2

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

4

TACH2

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

5

GND

Ground for Analog and Digital Circuitry.

6

VCC

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

7

THERM

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).

8

FAN_FAULT/REF FAN_FAULT: Open-Drain Output. Asserted low when one or both fans stall. Requires a pull-up resistor to VCC.

REF: Analog Input Reference for the THERM Input.

9

D1−

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

10

D1+

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

11

D2−

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

12

D2+

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

13

LOCATION

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).

14

ALERT

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.

15

SDA

Serial Bus Bidirectional Data. Connects to the SMBus master’s data line. Requires pull-up resistor if not

provided elsewhere in the system.

16

SCL

Serial SMBus Clock Input. Connects to the SMBus master’s clock line. Requires pull-up resistor if not already

provided in the system.

Rev. 0 | Page 7 of 40

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