參數(shù)資料
型號(hào)： ADM1027ARQZ-RL7
廠商： ON Semiconductor
文件頁(yè)數(shù)： 13/56頁(yè)
文件大小： 1822K
描述： IC REMOTE THERMAL CTLR 24QSOP
產(chǎn)品變化通告： MFG CHG Notification ADI to ON Semi
Product Discontinuation Notice 25/Aug/2008
Product Obsolescence 30/Sept/2009
標(biāo)準(zhǔn)包裝： 1,000
系列： dBCool®
功能： 風(fēng)扇控制，溫度監(jiān)控器
傳感器類型： 內(nèi)部和外部
感應(yīng)溫度： 0°C ~ 105°C，外部傳感器
精確度： ±1°C
拓?fù)洌?/td> ADC，比較器，風(fēng)扇速度計(jì)數(shù)器，多路復(fù)用器，寄存器庫(kù)
輸出類型： SMBus?
輸出警報(bào)： 無(wú)
輸出風(fēng)扇： 是
電源電壓： 3 V ~ 5.5 V
工作溫度： 0°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 24-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 24-QSOP
包裝： 帶卷 (TR)
REV. A
ADM1027
13
VID CODE MONITORING
The ADM1027 has five dedicated voltage ID (VID code) inputs.
These are digital inputs that can be read back through the
VID register (Reg. 0x43) to determine the processor voltage
required/being used in the system. Five VID code inputs
support VRM9.x solutions.
VID CODE REGISTER  Register 0x43
<0> = VID0 (reflects logic state of Pin 5)
<1> = VID1 (reflects logic state of Pin 6)
<2> = VID2 (reflects logic state of Pin 7)
<3> = VID3 (reflects logic state of Pin 8)
<4> = VID4 (reflects logic state of Pin 19)
ADDITIONAL ADC FUNCTIONS
A number of other functions are available on the ADM1027 to
offer the systems designer increased flexibility:
Turn Off Averaging
For each voltage measurement read from a value register,
16 readings have actually been made internally and the results
averaged before being placed into the value register. There may
be an instance where the user would like to speed up conversions.
Setting Bit 4 of Configuration Register 2 (Reg. 0x73) turns
averaging off. This effectively gives a reading 16?faster than
711 ms, but the reading may be noisier.
Bypass Voltage Input Attenuators
Setting Bit 5 of Configuration Register 2 (Reg. 0x73) removes
the attenuation circuitry from the 2.5 V, V
CCP
, V
CC
, 5 V, and
12 V inputs. This allows the user to directly connect external
sensors or rescale the analog voltage measurement inputs for
other applications. The input range of the ADC without the
attenuators is 0 V to 2.25 V.
Single-Channel ADC Conversions
Setting Bit 6 of Configuration Register 2 (Reg. 0x73) places the
ADM1027 into single-channel ADC conversion mode. In this
mode, the ADM1027 can be made to read a single voltage channel
only. If the internal ADM1027 clock is used, the selected input
will be read every 711 ms. The appropriate ADC channel is
selected by writing to Bits <7:5> of TACH1 minimum high
byte register (0x55).
Bits <7:5> Reg. 0x55
Channel Selected
000
2.5 V
001
V
CCP
010
V
CC
011
5 V
100
12 V
Configuration Register 2 (Reg. 0x73)
<4> = 1 Averaging off
<5> = 1 Bypass input attenuators
<6> = 1 Single-channel convert mode
TACH1 Minimum High Byte (Reg. 0x55)
<7:5> Selects ADC channel for single-channel convert mode
Rev. 3 | Page 13 of 56 | www.onsemi.com
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