參數(shù)資料
型號: LM87
廠商: National Semiconductor Corporation
英文描述: Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing
中文描述: 串行接口系統(tǒng)硬件監(jiān)控與遠(yuǎn)程二極管溫度傳感器
文件頁數(shù): 7/32頁
文件大小: 470K
代理商: LM87
Pin Name
INT
#
D1
D2
D3
R1
R2
R3
100k 1M
R4
Pin Name
+12Vin
D1
D2
D3
R1
R1+R2
130k
R1+R2
130k
R1+R2
130k
0
0
0
R2
R3
R4
x
x
x
0
x
x
CI
x
x
x
0
1M
+5Vin
x
x
FAN1–FAN2
x
x
x
0
1M
+3.3Vin, +2.5Vin,
Vccp1, Vccp2
THERM
VID4–VID0
DACOut/NTEST_IN
x
x
x
1M
SMBCLK
SMBData
RESET
#
ADD/NTEST_OUT
x
x
x
x
x
x
x
x
x
x
x
x
0
0
0
0
1M
1M
x
x
x
x
x
x
x
x
x
100k 1M
100k 1M
100k 1M
1M
1M
Note 9:
Typicals are at T
J
= T
A
= 25 C and represent most likely parametric norm.
Note 10:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 11:
The Temperature Error specification does not include an additional error of
±
1C, caused by the quantization error.
Note 12:
The Temperature Error will vary less than
±
1C over the operating Vcc range of 2.8V to 3.8V.
Note 13:
TUE (Total Unadjusted Error) includes Offset, Gain and Linearity errors of the ADC.
Note 14:
Total Monitoring Cycle Time includes all diode checks, temperature conversions and analog input voltage conversions. Fan tachometer readings are
determined separately and do not affect the completion of the monitoring cycle.
Note 15:
This is the lowest DAC code guaranteed to give a non-zero DAC output.
Note 16:
The total fan count is based on 2 pulses per revolution of the fan tachometer output.
Note 17:
Timing specifications are tested at the specified logic levels, V
IL
for a falling edge and V
IH
for a rising edge.
10099505
An x indicates that the diode exists.
FIGURE 2. ESD Protection Input Structure
L
www.national.com
7
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