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參數(shù)資料
| 型號： | LM231WM |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Precision Voltage-to-Frequency Converters |
| 中文描述： | 精密電壓到頻率轉換器 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大?。?/td> | 368K |
| 代理商： | LM231WM |
Electrical Characteristics
(Continued)
T
A
=25C unless otherwise specified (Note 2)
Parameter
TIMER
V
SAT PIN 5
(Reset)
CURRENT SOURCE (Pin 1)
Output Current
LM231, LM231A
LM331, LM331A
Change with Voltage
Current Source OFF Leakage
LM231, LM231A, LM331, LM331A
All Devices
Operating Range of Current (Typical)
REFERENCE VOLTAGE (Pin 2)
LM231, LM231A
LM331, LM331A
Stability vs Temperature
Stability vs Time, 1000 Hours
LOGIC OUTPUT (Pin 3)
V
SAT
Conditions
Min
Typ
Max
Units
I = 5 mA
0.22
0.5
V
R
S
=14 k
, V
PIN 1
=0
126
116
135
136
0.2
144
156
1.0
μA
μA
μA
0V
≤
V
PIN 1
≤
10V
0.02
2.0
10.0
50.0
nA
nA
μA
T
A
=T
MAX
(10 to 500)
1.76
1.70
1.89
1.89
±
60
±
0.1
2.02
2.08
V
DC
V
DC
ppm/C
%
I=5 mA
I=3.2 mA (2 TTL Loads), T
MIN
≤
T
A
≤
T
MAX
0.15
0.10
±
0.05
0.50
0.40
1.0
V
V
μA
OFF Leakage
SUPPLY CURRENT
LM231, LM231A
LM331, LM331A
V
S
=5V
V
S
=40V
V
S
=5V
V
S
=40V
2.0
2.5
1.5
2.0
3.0
4.0
3.0
4.0
4.0
6.0
6.0
8.0
mA
mA
mA
mA
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating conditions.
Note 2:
All specifications apply in the circuit of Figure 4 with 4.0V
≤
V
S
≤
40V, unless otherwise noted.
Note 3:
Nonlinearity is defined as the deviation of f
from V
IN
x (10 kHz/10 V
) when the circuit has been trimmed for zero error at 10 Hz and at 10 kHz, over
the frequency range 1 Hz to 11 kHz. For the timing capacitor, C
T
, use NPO ceramic, Teflon
, or polystyrene.
Note 4:
Human body model, 100 pF discharged through a 1.5 k
resistor.
www.national.com
3
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