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參數資料
| 型號： | MF4 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | MF4 4th Order Switched Capacitor Butterworth Lowpass Filter |
| 中文描述： | MF4四階巴特沃斯低通開關電容濾波器 |
| 文件頁數： | 4/14頁 |
| 文件大小： | 481K |
| 代理商： | MF4 |
Filter Electrical Characteristics
(Continued)
The following specifications apply for f
≤
250 kHz (Note 5) unless otherwise specified.
Boldface limits apply for T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25C.
Parameter
Conditions
Typical
(Note 10)
Tested
Limit
(Note 11)
Design
Limit
(Note 12)
Unit
V
+
= +2.5V, V
= 2.5V
Stopband Attenuation (Min)
DC Offset Voltage
Minimum Output Swing
at 2 f
c
25.0
150
+1.5
2.2
28
0.5
78
24.0
24.0
dB
mV
V
V
mA
mA
dB
R
L
= 10 k
+1.0
1.7
+1.0
1.7
Output Short Circuit
Current (Note 8)
Dynamic Range (Note 4)
Additional Magnitude
Response Test Points
(Note 6)
(f
c
= 5 kHz)
Magnitude at
Source
Sink
f
clk
= 250 kHz
7.57
±
0.47
1.46
±
0.12
7.57
±
0.47
1.46
±
0.12
dB
f = 6000 Hz
f = 4500 Hz
dB
(f
c
= 2.5 kHz)
Magnitude
f = 3000 Hz
dB
f = 2250 Hz
Logic Input-Output Characteristics
The following specifications apply for V
= 0V (Note 7) unless otherwise specified.
Boldface limits apply for T
MIN
to T
MAX
;
all
other limits T
A
= T
J
= 25C.
Typical
(Note 10)
Tested
Limit
(Note 11)
Design
Limit
(Note 12)
Parameter
Conditions
Unit
SCHMITT TRIGGER
V
T
+, Positive Going Threshold
Voltage
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
V
+
= 10V
7.0
6.1
6.1
8.9
3.1
4.4
1.3
3.8
0.6
1.9
2.3
7.6
1.2
3.8
9.0
4.5
1.0
0.5
3.0
0.75
2.5
0.65
V
V
+
= 5V
3.5
3.1
4.4
1.3
3.8
0.6
1.9
2.3
7.6
1.2
3.8
9.0
4.5
1.0
0.5
3.0
0.75
2.5
0.65
V
V
T
, Negative Going Threshold
Voltage
V
+
= 10V
3.0
V
V
+
= 5V
1.5
V
Hysteresis (V
T+
–V
T
)
V
+
= 10V
4.0
V
V
+
= 5V
2.0
V
Minimum Logical “1” Output Voltage
(pin 2)
Maximum Logical “0” Output Voltage
(pin 2)
Minimum Output Source Current
(pin 2)
Maximum Output Sink Current
(pin 2)
I
0
= 10 μA
V
+
= 10V
V
+
= 5V
V
+
= 10V
V
+
= 5V
V
+
= 10V
V
+
= 5V
V
+
= 10V
V
+
= 5V
V
V
V
V
I
0
= 10 μA
CLK R Shorted
to Ground
CLK R Shorted
to V
+
6.0
1.5
5.0
1.3
mA
mA
mA
mA
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4
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