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ADM1030ARQZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
Semiconductor Components Industries, LLC, 2012
April, 2012 − Rev. 3
1 Publication Order Number:
ADM1030/D
ADM1030
Intelligent Temperature
Monitor and PWM Fan
Controller
The ADM1030 is an ACPI-compliant two-channel digital
thermometer and under/over temperature alarm, for use in computers
and thermal management systems. Optimized for the Pentium
III,
the higher 1C accuracy offered allows systems designers to safely
reduce temperature guardbanding and increase system performance.
A Pulsewidth Modulated (PWM) Fan Control output controls the
speed of a cooling fan by varying output duty cycle. Duty cycle values
between 33%–100% allow smooth control of the fan. The speed of the
fan can be monitored via a TACH input for a fan with a tach output.
The TACH input can be programmed as an analog input, allowing the
speed of a 2-wire fan to be determined via a sense resistor. The device
will also detect a stalled fan. A dedicated Fan Speed Control Loop
provides control even without the intervention of CPU software. It
also ensures that if the CPU or system locks up, the fan can still be
controlled based on temperature measurements, and the fan speed
adjusted to correct any changes in system temperature. Fan Speed may
also be controlled using existing ACPI software. One input (two pins)
is dedicated to a remote temperaturesensing diode with an accuracy of
1C, and a local temperature sensor allows ambient temperature to be
monitored. The device has a programmable INT output to indicate
error conditions. There is a dedicated FAN_FAULT
output to signal
fan failure. The THERM
pin is a fail-safe output for over-temperature
conditions that can be used to throttle a CPU clock.
Features
Optimized for Pentium
III: Allows Reduced Guardbanding
Software and Automatic Fan Speed Control
Automatic Fan Speed Control Allows Control Independent of CPU
Intervention after Initial Setup
Control Loop Minimizes Acoustic Noise and Battery Consumption
Remote Temperature Measurement Accurate to 1C Using Remote
Diode
0.125C Resolution on Remote Temperature Channel
Local Temperature Sensor with 0.25C Resolution
Pulsewidth Modulation Fan Control (PWM)
Programmable PWM Frequency
Programmable PWM Duty Cycle
Tach Fan Speed Measurement
Analog Input To Measure Fan Speed of 2-wire Fans
(Using Sense Resistor)
2-wire System Management Bus (SMBus) with ARA Support
Overtemperature THERM Output Pin
Programmable INT Output Pin
Configurable Offset for All Temperature Channels
3 V to 5.5 V Supply Range
Shutdown Mode to Minimize Power Consumption
This is a Pb-Free Device*
Applications
Notebook PCs, Network Servers and Personal
Computers
Telecommunications Equipment
* For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 29 of this data sheet.
ORDERING INFORMATION
1029ARQZ = Special Device Code
# = Pb-Free Package
YY = Year
WW = Work Week
MARKING DIAGRAM
QSOP−16
CASE 492
ADM1030
Top View
(Not To Scale)
SCL
SDA
INT
NC
ADD
NC
D+
D−
PWM_OUT
TACH/AIN
NC
NC
GND
V
CC
THERM
FAN_FAULT
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
PIN ASSIGNMENT
NC = No Connect
1030A
RQZ
#YYWW
ADM1030
http://onsemi.com
2
Figure 1. Functional Block Diagram
ADM1030
NC
PWM
CONTROLLER
V
CC
ADD
INT
3
4
1
2
10
9
NC
PWM_OUT
TACH/AIN
D+
D−
TACH SIGNAL
CONDITIONING
BANDGAP
TEMPERATURE
SENSOR
SLAVE
ADDRESS
REGISTER
FAN
CHARACTERISTICS
REGISTER
FAN SPEED
CONFIG
REGISTER
T
MIN
/T
RANGE
REGISTER
FAN SPEED
COUNTER
ANALOG
MULTIPLEXER
ADC
2.5 V
BANDGAP
REFERENCE
5
6
SERIAL BUS
INTERFACE
ADDRESS
POINTER
REGISTER
INTERRUPT
STATUS
REGISTER
LIMIT
COMPARATOR
VALUE AND LIMIT
REGISTERS
OFFSET
REGISTERS
CONFIGURATION
REGISTER
GND
13
15
16
12
14
7
8
11
SDA
SCL
NC
THERM
FAN_FAULT
NC
NC = NO CONNECT
Table 1. ABSOLUTE MAXIMUM RATINGS
Rating Value Unit
Positive Supply Voltage (V
CC
) 6.5 V
Voltage on Any Input or Output Pin −0.3 to +6.5 V
Input Current at Any Pin 5 mA
Package Input Current 20 mA
Maximum Junction Temperature (T
JMAX
) 150 C
Storage Temperature Range −65 to +150 C
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
215
200
C
ESD Rating All Pins 2,000 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.
WARNING: Electrostatic Sensitive Device − Do not open packages or handle except at a static-free workstation.
WARNING: Moisture Sensitive Device − Non-RoHS Compliant − Level 3 MSL; RoHS Compliant − Level 4 MSL. Do not open packages
except under controlled conditions.
Table 2. THERMAL CHARACTERISTICS
Package Type
q
JA
q
JC
Unit
16-lead QSOP 105 39 C/W
ADM1030
http://onsemi.com
3
Table 3. PIN FUNCTION DESCRIPTIONS
Pin No. Mnemonic Description
1 PWM_OUT Digital Output (Open-Drain). Pulsewidth modulated output to control fan speed. Requires pull-up
resistor (10 kW typical).
2 TACH/AIN Digital/Analog Input. Fan tachometer input to measure fan speed. May be reprogrammed as an
analog input to measure speed of a 2-wire fan via a sense resistor (2 W typical)
3, 4, 11, 12 NC Not Connected.
5 GND System Ground.
6 V
CC
Power. Can be powered by 3.3 V Standby power if monitoring in low power states is required.
7 THERM Digital I/O (Open-Drain). An active low thermal overload output that indicates a violation of a
temperature set point (overtemperature). Also acts as an input to provide external fan control. When
this pin is pulled low by an external signal, a status bit is set, and the fan speed is set to full-on.
Requires pull-up resistor (10 kW).
8 FAN_FAULT Digital Output (Open-Drain). Can be used to signal a fan failure. Requires pull-up resistor (typically
10 kW).
9 D– Analog Input. Connected to cathode of an external temperature-sensing diode. The
temperature-sensing element is either a Pentium
III substrate transistor or a general-purpose
2N3904.
10 D+ Analog Input. Connected to anode of the external temperature-sensing diode.
13 ADD Three-state Logic Input. Sets two lower bits of device SMBus address.
14 INT Digital Output (Open-Drain). Can be programmed as an interrupt output for temperature/fan speed
interrupts. Requires pull-up resistor (10 kW typical).
15 SDA
Digital I/O. Serial Bus Bidirectional Data. Open-drain output. Requires pull-up resistor (2.2 kW typical).
16 SCL
Digital Input. Serial Bus Clock. Requires pull-up resistor (2.2 kW typical).
Table 4. ELECTRICAL CHARACTERISTICS (T
A
= T
MIN
to T
MAX
, V
CC
= V
MIN
to V
MAX
, unless otherwise noted. (Note 1))
Parameter
Test Conditions/Comments Min Typ Max Unit
POWER SUPPLY
Supply Voltage, V
CC
3.0 3.3 5.5 V
Supply Current, I
CC
Interface Inactive, ADC Active
Standby Mode
−
−
1.4
32
3.0
50
mA
mA
TEMPERATURE-TO-DIGITAL CONVERTER
Internal Sensor Accuracy
− 1.0 3.0 C
Resolution − 0.25 − C
External Diode Sensor Accuracy 60C < T
D
< 100C − − 1.0 C
Resolution − 0.125 − C
Remote Sensor Source Current High Level
Low Level
−
−
180
11
−
−
mA
OPEN-DRAIN DIGITAL OUTPUTS (THERM, INT, FAN_FAULT, PWM_OUT)
Output Low Voltage, V
OL
I
OUT
= −6.0 mA, V
CC
= 3 V − − 0.4 V
High Level Output Current, I
OH
V
OUT
= V
CC
, V
CC
= 3 V − 0.1 1.0
mA
DIGITAL INPUT LEAKAGE CURRENT
Input High Current, I
IH
V
IN
= V
CC
–1.0 − −
mA
Input Low Current, I
IL
V
IN
= 0 − − 1.0
mA
Input Capacitance, C
IN
− 5 − pF
DIGITAL INPUT LOGIC LEVELS (ADD, THERM, TACH) (Note 2)
Input High Voltage, V
IH
2.1 − − V
Input Low Voltage, V
IL
− − 0.8 V
OPEN-DRAIN SERIAL DATA BUS OUTPUT (SDA)
Output Low Voltage, V
OL
I
OUT
= –6.0 mA, V
CC
= 3 V − − 0.4 V
High Level Output Leakage Current, I
OH
V
OUT
= V
CC
− 0.1 1.0
mA
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ADM1030ARQZ

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Buy ADM1030ARQZ
Manufacturer:
ON Semiconductor
Description:
Motor / Motion / Ignition Controllers & Drivers TDM & PWM FAN CNTRLRS IC
Lifecycle:
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