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參數(shù)資料
| 型號： | LM81 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Serial Interface ACPI-Compatible Microprocessor System |
| 中文描述： | 串行接口ACPI的兼容微處理器系統(tǒng) |
| 文件頁數(shù)： | 5/32頁 |
| 文件大小： | 412K |
| 代理商： | LM81 |
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DC Electrical Characteristics
(Continued)
The following specifications apply for +2.8V
≤
V
+
≤
+3.8V
, R
= 500
, unless otherwise specified.
Boldface limits apply
for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25C. (Note 8)
Symbol
Parameter
Conditions
Typical
(Note 9)
Limits
(Note 10)
Units
(Limits)
DAC CHARACTERISTICS
Resolution
DAC Error
8
Bits
V
+
= 3.3V
±
5
62.5
100
1.5
625
20
% (max)
mV (max)
ppm/C (max)
%/V (max)
(min)
pF (max)
DAC Error Temperature Sensitivity
DAC Error Power Supply Sensitivity
Output Load Resistance
Output Load Capacitance
FAN RPM-TO-DIGITAL CONVERTER
Fan RPM Error
R
L
C
L
V
O
= 1.25V
+25C
≤
T
A
≤
+75C
10C
≤
T
A
≤
+100C
40C
≤
T
A
≤
+125C
±
10
±
15
±
20
255
% (max)
% (max)
% (max)
(max)
RPM
Full-scale Count
FAN1 and FAN2 Nominal Input
RPM (See Section 6.0)
Divisor = 1, Fan Count =
153 (Note 14)
Divisor = 2, Fan Count =
153 (Note 14)
Divisor = 3, Fan Count =
153 (Note 14)
Divisor = 4, Fan Count =
153 (Note 14)
+25C
≤
T
A
≤
+75C
8800
4400
RPM
2200
RPM
1100
RPM
Internal Clock Frequency
22.5
20.2
24.8
19.1
25.9
18
27
kHz (min)
kHz (max)
kHz (min)
kHz (max)
kHz (min)
kHz (max)
10C
≤
T
A
≤
+100C
22.5
40C
≤
T
A
≤
+125C
22.5
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