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| 型号： | ADM1034ARQZ |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/38页 |
| 文件大小： | 427K |
| 描述： | IC THERM/FAN SPEED CTRLR 16-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Discontinuation 30/Sept/2011 |
| 标准包装： | 98 |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 125°C，外部传感器 |
| 精确度： | ±1°C |
| 拓扑： | ADC，比较器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
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ADM1034
http://onsemi.com
9
Figure 16. Setting Up Multiple ADM1034 Addresses
in SMBus 2.0 ARP-capable Mode
ADM1034 1
V
CC
GND
ARP
LOCATION = 111
1.5 kW
ADM1034 2
ADM1034 3
ADM1034 4
ADM1034 5
ADM1034 6
ADM1034 7
ADM1034 8
ARP
LOCATION = 110
1 kW
ARP
LOCATION = 101
1 kW
ARP
LOCATION = 100
1 kW
FD
ADDRESS = 53h
1 kW
FD
ADDRESS = 52h
1 kW
FD
ADDRESS = 51h
1.5 kW
FD
ADDRESS = 50h
In SMBus 2.0 mode, this vendor specific ID is generated
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 ADM1034s and assign a different
address to each.
The state of the LOCATION input on powerup is also
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 7.
The SMBus 2.0 master issues both general and directed
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.)
The ADM1034 responds to the following commands:
?SPAN class="pst ADM1034ARQZ-REEL_2295499_5"> Prepare to ARP (General)
?SPAN class="pst ADM1034ARQZ-REEL_2295499_5"> Reset Device (General and Directed)
?SPAN class="pst ADM1034ARQZ-REEL_2295499_5"> Get UDID (General and Directed)
?SPAN class="pst ADM1034ARQZ-REEL_2295499_5"> Assign Address (General)
Table 5. INTERNAL REGISTER DESCRIPTIONS
Register
Description
Configuration
Provides control and configuration of various functions on the device.
Conversion Rate
Determines the number of measurements per second completed by the ADM1034.
Address Pointer
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.
Status
Provides the status of each limit comparison.
Interrupt Mask
Allows the option to mask ALERT
s due to particular out-of-limit conditions.
Value and Limit
Stores the results of temperature and fan speed measurements, along with their limit values.
Offset
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癈 from a temperature reading.
THERM
Limit and Hysteresis
Contains the temperature value at which THERM
is asserted and indicates the level of hysteresis.
Look-up Table
Used to program the look-up table for the fan speed-to-temperature profile.
THERM
% On-Time and
THERM
% Limit
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.
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