ADM1034ARQZ-R7 ON Semiconductor, ADM1034ARQZ-R7 Datasheet - Page 9

• Manufacturer Part Number: ADM1034ARQZ-R7
• Description: IC THERM/FAN SPEED CTLR 16-QSOP
• Manufacturer: ON Semiconductor

Specifications of ADM1034ARQZ-R7

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. ARP denotes ARP−capable mode, FD denotes fixed and discoverable mode.
Table 1. Internal Register Descriptions
Table 2. Resistor Ratios for Setting LOCATION Bits
Register
Figure 16. Setting Up Multiple ADM1034 Addresses
Configuration
Conversion Rate
Address Pointer
Status
Interrupt Mask
Value and Limit
Offset
THERM Limit and Hysteresis
Look−Up Table
THERM % On−time and
THERM % Limit
Ideal Ratio R2/(R1 + R2)
LOCATION = 110
LOCATION = 100
LOCATION = 111
LOCATION = 101
ADDRESS = 53h
ADDRESS = 52h
ADDRESS = 51h
ADDRESS = 50h
0.8125
0.6875
0.5625
0.4375
0.3125
0.1875
in SMBus 2.0 ARP−Capable Mode
N/A
N/A
ARP
ARP
ARP
ARP
FD
FD
FD
FD
GND
V
CC
1.5kΩ
1kΩ
1kΩ
1kΩ
1kΩ
1kΩ
1.5kΩ
R1 kW
O/C
18
22
12
15
47
82
0
Description
Provides control and configuration of various functions on the device.
Determines the number of measurements per second completed by the ADM1034.
Contains the address that selects one of the other internal registers. When writing to the ADM1034,
the first byte of data is always a register address, written to the address pointer register.
Provides the status of each limit comparison.
Allows the option to mask ALERTs due to particular out−of−limit conditions.
Stores the results of temperature and fan speed measurements, along with their limit values.
Allows the local and remote temperature channel readings to be offset by a twos complement value
written to them. These values are automatically added to the temperature values (or subtracted from
them if negative). This allows the systems designer to optimize the system if required, by adding or
subtracting up to 15.875°C from a temperature reading.
Contains the temperature value at which THERM is asserted and indicates the level of hysteresis.
Used to program the look−up table for the fan speed−to−temperature profile.
Reflects the state of the THERM input and monitors the duration of the assertion time of the signal as
a percentage of a time window. The user can program the length of the time window.
ADM1034 1
ADM1034 2
ADM1034 3
ADM1034 4
ADM1034 5
ADM1034 6
ADM1034 7
ADM1034 8
R2 W
O/C
82
47
15
12
22
18
0
Actual R2/(R1 + R2)
http://onsemi.com
0.6812
0.5556
0.4444
0.3188
0.82
0.18
1
0
9
by an on−chip random number generator. This should enable
two adjacent ADM1034s in the same system to powerup
with a different vendor specific ID, allowing the master to
identify the two separate ADM1034’s and assign a different
address to each.
reflected in the UDID. This is useful when there is more than
one ADM1034 in the system, so the master knows which one
it is communicating with. The complete UDID is listed in
Table 3.
ARP commands. A general command is directed at all ARP
devices. A directed command is targeted at a single device
once an address has been established. The PEC byte must be
used for ARP commands. (Refer to the Packet Error
Checking (PEC) section.)
•
•
•
•
In SMBus 2.0 mode, this vendor specific ID is generated
The state of the LOCATION input on powerup is also
The SMBus 2.0 master issues both general and directed
The ADM1034 responds to the following commands:
Prepare to ARP (general)
Reset device (general and directed)
Get UDID (general and directed)
Assign address (general)
Error %
+0.75
−0.63
−0.69
+0.69
+0.63
−0.75
0
0
SMBus Ver
(Note 1)
ARP
ARP
ARP
ARP
FD
FD
FD
FD
SMBus Address
0x53
0x52
0x51
0x50
N/A
N/A
N/A
N/A
UDID LLL
101
100
N/A
N/A
N/A
N/A
111
110