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PDF ADM1034 Fiche technique - ON Semiconductor

Numéro de référence ADM1034
Description Thermal Monitor and Fan Speed (RPM) Controller
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ADM1034 Datasheet, Description
ADM1034
Thermal Monitor and Fan
Speed (RPM) Controller
The ADM1034 is a dual-channel remote- and local-temperature
sensor and fan controller. The remote channels monitor the
temperature of two remote thermal diodes, which may be discrete
2N3904/6s or may be located on a microprocessor die. The device also
monitors its own ambient temperature.
The ADM1034 can monitor and control the speed of two cooling
fans. The user can program a target fan speed, or else use the look-up
table to input a temperature-to-fan speed profile. The look-up table
can be configured to run the fans at discrete speeds (discrete mode) or
to ramp the fan speed with temperature (linear mode).
The ADM1034 communicates over a 2-wire SMBus 2.0 interface.
An 8-level LOCATION input allows the user to choose between
SMBus 1.1 and SMBus 2.0. An ALERT output indicates error
conditions. The THERM I/O signals overtemperature as an output and
times THERM assertions as an input. Pin 8 can be configured as a
reference for the THERM (PROCHOT) input.
Features
1 Local and 2 Remote Temperature Channels
1C Accuracy on Local and Remote Channels
Automatic Remote Temperature Channels, Up to 1 kW
Fast (Up to 64 Measurements per Second)
SMBus 2.0, 1.1, and 1.0 Compliant
SMBus Address Input/LOCATION Input to UDID
Programmable Over/Undertemperature Limits
Programmable Fault Queue
SMBusALERT Output
Fail-Safe Overtemperature Comparator Output
Fan Speed (RPM) Controller
Look-up Table for Temperature-to-Fan Speed Control
Linear and Discrete Options for Look-up Table
FAN_FAULT Output
THERM Input, Used to Time PROCHOT Assertions
REF Input, Used as Reference for THERM (PROCHOT)
3.0 V to 5.5 V Supply
Small 16-lead QSOP Package
This is a Pb-Free Device*
Applications
Desktop and Notebook PCs
Embedded Systems
Telecommunications Equipment
LCD Projectors
* For additional information on our Pb-Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2012
April, 2012 Rev. 4
1
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QSOP16
CASE 492
PIN ASSIGNMENT
DRIVE1 1
TACH1 2
DRIVE2 3
TACH2 4
GND 5
VCC 6
THERM 7
FAN_FAULT/REF 8
ADM1034
16 SCL
15 SDA
14 ALERT
13 LOCATION
12 D2+
11 D2
10 D1+
9 D1
(Top View)
MARKING DIAGRAM
1034A
RQZ
#YYWW
1034ARQZ = Specific Device Code
# = Pb-Free Package
YY = Date Code
WW = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 37 of this data sheet.
Publication Order Number:
ADM1034/D
ADM1034 Fiche technique
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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ADM1034 pdf
ADM1034
TYPICAL PERFORMANCE CHARACTERISTICS
40
20
D+ TO GND
0
D+ TO VCC
20
40
60
80
100
0 10 20 30 40 50 60 70 80 90 100
LEAKAGE RESISTANCE (MW)
Figure 3. Temperature Error vs. PCB Track
Resistance DXP to GND and VCC
100
90 DEV 33
80
70
60
50
40
DEV 31
30
20
10 DEV 32
0
10
1 23 456
SERIES RESISTANCE IN D+/D(kW)
Figure 5. Remote Temperature Error vs.
Series Resistance on D+ and D
50
45
40
35
30
25 100 mV
20
15 20 mV
10 50 mV
5
0
0 1M 2M 3M 4M 5M 6M
NOISE FREQUENCY (Hz)
Figure 7. Remote Temperature Error vs.
Common-Mode Noise Frequency Coupled
on D+ and D
0
10
20 DEV 33 (C)
30
40 DEV 31 (C)
50 DEV 32 (C)
60
70
80
0
2 4 6 8 10
CAPACITANCE (nF)
Figure 4. Remote Temperature Error vs.
D+, DCapacitance
12
20
EXT 100 mVpp
15 EXT 250 mVpp
10
5
0
5
10
0
1M 2M 3M 4M 5M 6M
FREQUENCY (Hz)
Figure 6. Remote Temperature Error vs.
Power Supply Noise Frequency
4.0
10 mV
3.5 20 mV
3.0
2.5
2.0
1.5
1.0
0.5
0
0 1M 2M 3M 4M 5M 6M
NOISE FREQUENCY (Hz)
Figure 8. Remote Temperature Error vs.
Differential-Mode Noise Frequency Coupled
on D+ and D
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