參數(shù)資料
型號(hào): LM85
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 模擬信號(hào)調(diào)理
英文描述: Hardware Monitor with Integrated Fan Control
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO24
封裝: QSOP-24
文件頁數(shù): 5/26頁
文件大小: 261K
代理商: LM85
DC Electrical Characteristics
(Continued)
The following specifications apply for V+ = 3.0V to 3.6V, and all analog input source impedance R
S
= 50
unless otherwise
specified in conditions.
Boldface limits apply for T
A
= T
MIN
to T
MAX
;
all other limits T
A
= 25C.
Symbol
Parameter
Conditions
Typical
(Note 7)
210
Limits
(Note 8)
140
400
Units
(Limits)
k
(min)
k
(max)
Input Resistance, all analog inputs
DIGITAL OUTPUT: PWM1, PWM2, PWM3, XTESTOUT
I
OL
Logic Low Sink Current
LM85CIMQ
LM85BIMQ
LM85CIMQ
V
OL
=0.55V
V
OL
=0.4V
I
OUT
= +3 mA
I
OUT
= +8 mA
I
OUT
= +8 mA
8
8
mA (min)
mA (min)
V (max)
V (max)
V (max)
V
OL
Logic Low Level
0.4
0.55
0.4
LM85BIMQ
SMBUS OPEN-DRAIN OUTPUT: SMBDAT
V
OL
Logic Low Output Voltage
I
OH
High Level Output Current
SMBUS INPUTS: SMBCLK. SMBDAT
V
IH
Logic Input High Voltage
V
IL
Logic Input Low Voltage
V
HYST
Logic Input Hysteresis Voltage
DIGITAL INPUTS: ALL
V
IH
Logic Input High Voltage
V
IL
Logic Input Low Voltage
V
TH
Logic Input Threshold Voltage
I
IH
Logic High Input Current
I
IL
Logic Low Input Current
C
IN
Digital Input Capacitance
I
OUT
= +4 mA
V
OUT
= V+
0.4V
10
V (max)
μA (max)
0.1
2.1
0.8
V (min)
V (max)
mV
300
2.1
0.8
V (min)
V (max)
V
μA (max)
μA (max)
pF
1.5
0.005
0.005
20
V
IN
= V+
V
IN
= GND
10
10
AC Electrical Characteristics
The following specifications apply for V+ = 3.0V to 3.6V unless otherwise specified in conditions.
Boldface limits apply for T
A
= T
MIN
to T
MAX
;
all other limits T
A
= 25C.
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limits)
TACHOMETER ACCURACY
Fan Count Accuracy
Fan Full-Scale Count
Fan Counter Clock Frequency
Fan Count Conversion Time
±
10
65536
% (max)
(max)
kHz
sec (max)
90
0.7
1.4
FAN PWM OUTPUT
Frequency Setting Accuracy
Frequency Range
±
10
% (max)
Hz
Hz
% (max)
%
ms ms
10
94
Duty-Cycle Range
Duty-Cycle Resolution (8-bits)
Spin-Up Time Interval Range
0 to 100
0.390625
100
4000
Spin-Up Time Interval Accuracy
SPIKE SMOOTHING FILTER
Time Interval Deviation
Time Interval Range
±
10
% (max)
±
10
% (max)
sec
sec
35
0.8
L
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