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MAX271ENG Datasheet(PDF) 14 Page - Analog Devices

Part # MAX271ENG
Description  Digitally-Programmed, Dual 2nd-Order Continuous Lowpass Filter
PDF  16 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

MAX271ENG Datasheet(HTML) 14 Page - Analog Devices

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14
Maxim Integrated
Digitally-Programmed, Dual
2nd-Order Continuous Lowpass Filter
MAX270/MAX271
Figure 5. Cascading Filter Sections
Figure 6. Independent fC Programming without a µP
OUTB
INA
58
OUPUT fC = 1kHz
80dB/dec. ROLLOFF
OUTA
INB
3
7
SHDN
4
+5V
-5V
V+
2
MAX270
A0
D5
D6
D4
D3
D2
D1
D0
12
V-
6
11
10
OP IN
20
GND
9
16
15
17
18
19
14
13
WR
CS
INPUT
SIGNAL
OUTB
OP OUT
D6
MAX270
MAX690
WR
GND
FILTER SECTION A
+5V
OUTB
INB
V-
-5V
INA
SHDN
SIGNAL B
SIGNAL A
+5V
OUTA
100kI
6
D6
D5
100kI
100kI
4.7kI
5
D5
D4
100kI
4
D4
D3
100kI
3
D3
D2
100kI
2
D2
D1
100kI
1
D1
D0
A0
CS
100kI
0
D0
PFO
WDI
RESET
VBATT
VOUT
VCC
GND
PFI
0.1µF
0.1µF
+5V
0
1
2
34
5
VCC
OC
8D
74HC373
1Q
TO D0
TO D1
TO D2
TO D3
TO D4
TO D5
+5V
+5V
GND
4Q
4D
3D
3Q
2Q
2D
1D
7D
7Q
6Q
6D
5D
5Q
C
V+
+5V
6
TO D6
8Q
FILTER SECTION B
STRAP PINS HIGH/LOW TO SET FILTER tC DATA.
FILTER DATA RELOADED ON EACH POWER-UP.



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