ADM1031ARQ-REEL7 ON Semiconductor, ADM1031ARQ-REEL7 Datasheet - Page 23

• Manufacturer Part Number: ADM1031ARQ-REEL7
• Description: IC SENSOR 2-TEMP/FAN CTRL 16QSOP
• Manufacturer: ON Semiconductor

Specifications of ADM1031ARQ-REEL7

• Rohs Status: RoHS non-compliant
• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 100°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP

Table 12. Registers
Value Registers
Device ID Register
Company ID THERM
Behavior/Revision
Configuration Register 1
Configuration Register 2
Status Register 1
Status Register 2
Manufacturer’s Test Register
Fan Characteristics Register 1
Fan Characteristics Register 2
Fan Speed Configuration Register
Fan Filter Register
Local Temperature T
Remote 1 Temperature T
Remote 2 Temperature T
2−WIRE
FAN2
FAN
NDT3055L
(N−MOS)
R
Register Name
SENSE
5.0 V
MIN
FAN FAILURE
(DO NOT CONNECT
0.01mF
CPU CLOCK
FAN_FAULT
CONDITION
SIGNAL TO
TO SIGNAL
THROTTLE
TACH
10 kV
/T
MIN
MIN
TYP
5.0 V MAX
TO 12 V)
RANGE
THERM
/T
/T
RANGE
RANGE
NDT3055L
(NMOS)
5.0 V
3.3 V
3.3 V
3.3 V
A7−A0 in Hex
1
10 kV
TYP
IN ACTUAL APPLICATION, BOTH FANS MUST BE 2−WIRE OR 3−WIRE TYPE. A SINGLE BIT
10 kV
TYP
10 kV
TYP
CONTROLS WHETHER TACH1/AIN1 AND TACH2/AIN2 ARE ANALOG OR DIGITAL INPUTS.
0x08–0x1E
Address
FAN1
3−WIRE
FAN
Figure 39. Typical Application Circuit
3.3 V
0x3D
0x3E
0x3F
0x00
0x01
0x02
0x03
0x07
0x20
0x21
0x22
0x23
0x24
0x25
0x26
10 kV
TYP
1
FAN_FAULT
TACH1/AIN1
TACH2/AIN2
PWM_OUT2
PWM_OUT1
3.3 V
THERM
http://onsemi.com
GND
V
CC
This location contains the revision number of the device. The lower four bits
reflect device revisions [3:0]. Bit 7 of this register is the THERM−to−fan
enable bit. See Table 17.
See Table 13.
This location contains the device identification number. Since this device
is the ADM1031, this register contains 0x31. This register is read only.
This location contains the company identification number (0x41). This
register is read only.
See Table 14. (Power−On Value = 1001 0000)
See Table 15. (Power−On Value = 0111 1111)
See Table 16. (Power−On Value = 0000 0000)
See Table 17. (Power−On Value = 0000 0000)
This register is used by the manufacturer for test purposes only. This
register should not be read from or written to in normal operation.
See Table 19. (Power−On Value = 0101 1101)
See Table 20 . (Power−On Value = 0101 1101)
See Table 21. (Power−On Value = 0101 0101)
See Table 22. (Power−On Value = 0101 0000)
See Table 23. (Power−On Value = 0100 0001)
See Table 24. (Power−On Value = 0110 0001)
See Table 25. (Power−On Value = 0110 0001)
1
2
5
6
7
8
3
4
23
ADM1031
16
15
14
13
12
11
10
9
ADD
SCL
SDA
INT (SMBALERT)
D2+
D2–
D1+
D1–/NTI
2.2 kV
3.3 V
Comments
3.3 V
2.2 kV
3.3 V
10 kV
TYP
2N3904 OR PENTIUM III
CPU THERMAL DIODE
2N3904 OR PENTIUM III
CPU THERMAL DIODE
SCL
SDA
CPU INTERRUPT