LTC1062CN8 Linear Technology, LTC1062CN8 Datasheet - Page 5

• Manufacturer Part Number: LTC1062CN8
• Description: IC FILTER 5TH ORDER LOWPASS 8DIP
• Manufacturer: Linear Technology

Specifications of LTC1062CN8

• Filter Type: Butterworth, Lowpass Switched Capacitor
• Frequency - Cutoff Or Center: 20kHz
• Number Of Filters: 1
• Max-order: 5th
• Voltage - Supply: 5 V ~ 16 V, ±2.5 V ~ 8 V
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

BLOCK DIAGRA
AC TEST CIRCUIT
V
IN
For Adjusting Oscillator Frequency, Insert a 50k Pot in Series with C
R = 25.8k
50Ω
V
–
AGND
= –5V
FB
V
÷
–
1
2
3
4
1
2
3
4
C = 0.01µF
FB
AGND
V
DIVIDER
RATIO
–
LTC1062
W
CAPACITOR
CLOCK GEN
SWITCHED
NETWORK
÷ 1, 2, 4
B
C
OUT
OUT
OSC
V
f
+
CLK
8
7
6
5
R′
1062 F01
–5V
OSC
5V
f
CLK
×1
5V
= 100kHz
1062 BD
0.1µF
Figure 1
8
7
6
5
3
2
B
OUT
V
C
OUT
+
OSC
–
+
LTC1052
1
–5V
5V
7
4
8
6
BY CONNECTING PIN 4 TO V
OUTPUT FREQUENCY OF THE INTERNAL CLOCK
GENERATOR IS THE OSCILLATOR FREQUENCY DI-
VIDED BY 1, 2, 4. THE (f
WITH RESPECT TO THE INTERNAL CLOCK GENERA-
TOR OUTPUT FREQUENCY. PIN 5 CAN BE DRIVEN
WITH AN EXTERNAL CMOS LEVEL CLOCK. THE
LTC1062 CAN ALSO BE SELF-CLOCKED BY CON-
NECTING AN EXTERNAL CAPACITOR (C
GROUND (OR TO V
THIS CONDITION AND WITH ±5V SUPPLIES, THE
INTERNAL OSCILLATOR FREQUENCY IS:
0.1µF
OSC
f
OSC
MEASURED
OUTPUT
. Use Two Times Calculated C
≅ 140kHz [33pF/(33pF + C
–
IF C
FOR BEST MAX FLAT APPROXIMATION,
THE INPUT RC SHOULD BE SUCH AS:
A 0.5k RESISTOR, R′, SHOULD BE USED IF
THE BIPOLAR EXTERNAL CLOCK IS APPLIED
BEFORE THE POWER SUPPLIES TURN ON
OSC
CLK
2πRC
IS POLARIZED). UNDER
/f
1
C
+
) RATIO OF 100:1 IS
, AGND OR V
=
f
100
OSC
CLK
)]
•
OSC
–
1.63
, THE
) TO
1
OSC
LTC1062
1062fd
5