參數(shù)資料
型號: NCT7491RQR2G
廠商: ON Semiconductor
文件頁數(shù): 5/80頁
文件大?。?/td> 844K
描述: IC REMOTE THERMAL MONITOR 24QSOP
標(biāo)準(zhǔn)包裝: 2,500
系列: *
NCT7491
http://onsemi.com
5
Table 2. SPECIFICATIONS
Parameter
Test Conditions/Comments
Unit
Max
Typ
Min
ANALOGTODIGITAL CONVERTER (INCLUDING MUX AND ATTENTUATORS)
Total Unadjusted Error (TUE)
?
%
For 12 V channel
?.5
%
For all other channels
Differential Nonlinearity (DNL)
?
LSB
8 bits
Power Supply Sensitivity
?.1
%/V
Conversion Time (Voltage Input)
11
ms
Averaging enabled, 16 samples per
averaged reading.
Conversion Time (Local Temperature)
38
ms
Averaging enabled, 16 samples per
averaged reading.
Conversion Time (Remote Temperature)
38
ms
Averaging enabled, 16 samples per
averaged reading.
Input Resistance
245
kW
For +12 V channel
120
kW
For all other channels
FAN RPMTODIGITAL CONVERTER
Accuracy
?0
%
0癈 d T
A
 d 85癈
?4
%
40癈 d T
A
 d 125癈
FullScale Count
65,535
Nominal Input RPM
109
RPM
Fan count = 0xBFFF
329
RPM
Fan count = 0x3FFF
5,000
RPM
Fan count = 0x0438
10,000
RPM
Fan count = 0x021C
OPENDRAIN DIGITAL OUTPUTS, PWM1 TO PWM3, XTO
Current Sink, I
OL
8.0
mA
Output Low Voltage, V
OL
0.4
V
I
OUT
 = 8.0 mA
High Level Output Current, I
OH
0.1
20
mA
V
OUT
 = V
CC
OPENDRAIN SERIAL DATA BUS OUTPUTS (SDA, SDA_M, SCL_M)
Output Low Voltage, V
OL
0.4
V
I
OUT
 = 4.0 mA
High Level Output Current, I
OH
0.1
1.0
mA
V
OUT
 = V
CC
SMBus DIGITAL INPUTS (SCL, SDA, SDA_M)
Input High Voltage, V
IH
2.0
V
Input Low Voltage, V
IL
0.4
V
Hysteresis
500
mV
DIGITAL I/O (PECI PIN)
V
TT
 Supply Voltage
0.85
1.26
V
Input High Voltage, V
IH
0.55*V
tt
V
Input Low Voltage, V
IL
0.5*V
tt
V
Hysteresis
0.1V
tt
V
Hysteresis between input switching levels
High level output source current, I
SOURCE
6
mA
Output High Voltage, V
OH
 = 0.75*V
tt
Low level output sink current, I
SINK
0.5
1.0
mA
Output Low Voltage, V
OL
 = 0.25*V
tt
Signal noise immunity, V
noise
300
mV
pp
Noise glitches from 10  100MHz
Width up to 50ns
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