ADM1033

http://onsemi.com

2

Figure 1. Functional Block Diagram

RPM FAN

SPEED

CONTROLLER

SIGNAL

CONDITIONING

FAN

SPEED

COUNTER

ENHANCE

ACOUSTICS

TEMPERATURE

TO FAN SPEED

LOOK-UP TABLE

MANUAL FAN

SPEED CONTROL

REGISTERS

ADC

BAND GAP

REFERENCE

ANALOG

MULTIPLEXER

SRC

BLOCK

BAND GAP

TEMPERATURE

SENSOR

SMBUS

ADDRESS

SERIAL BUS

INTERFACE

ADDRESS

POINTER

REGISTER

STATUS

REGISTER

LIMIT

COMPARATOR

VALUE AND

LIMIT

REGISTERS

FAULT

QUEUE

HYSTERESIS

REGISTERS

OFFSET

REGISTERS

CONVERSION

RATE

REGISTER

CONFIGURATION

REGISTERS

MASK

REGISTERS

FAULT

QUEUE

THERM PERCENT

TIMER

ALERT

THERM

ADM1033

GND

5

NC = NO CONNECT

12

11

10

9

8

13

2

1

DRIVE

TACH

LOCATION

REF

D−

D+

NC

NC

6

16

15

8

3

14

7

SCL

SDA

FAN_FAULT

ALERT Comp

SMBusALERT

THERM

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

−0.3, +6.5

V

Voltage on Any Input or Output Pin except FAN_FAULT and LOCATION

V

Voltage on FAN_FAULT (Note 1)

Voltage on LOCATION

V

Input Current at Any Pin

20

mA

150

C

Storage Temperature Range

−65 to +150

C

Lead Temperature, Soldering (10 s)

300

C

IR Reflow Peak Temperature

220

C

ESD Rating − All Pins

1500

V

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.