LTC1068CG Просмотр технического описания (PDF) - Linear Technology

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LTC1068CG

Clock-Tunable, Quad Second Order, Filter Building Blocks

Linear Technology 

LTC1068 Series

TYPICAL APPLICATIONS

LTC1068 8th Order Linear Phase Bandpass, fCENTER = fCLK/128,

Passband –3dB at (0.88)(fCENTER) and (1.12)(fCENTER). Maximum

fCENTER = 40kHz with ±5V Supplies

RL1

63.4k

RH1

RB2

7.5k

16.2k

1

24

R21

INV B

INV C

R22

R11

26.1k

VIN

4.99k

R31

19.6k

R41

2

23

HPB/NB HPC/NC

3 BPB

BPC 22

4.99k

R32

21.5k

12.1k

5V

4 LPB

LPC 21

LTC1068

5

6

SB

AGND

7 V+

SC 20

V– 19

R52

4.99k

R62

7.5k

–5V

0.1µF

0.1µF

R43

10.7k

R33

14.7k

R23

8 SA

9 LPA

10 BPA

CLK 18 1.28MHz

SD 17

R64 17.8k

R54

LPD 16

4.99k

R34 VOUT

BPD 15 28.7k

R24

4.99k

11 HPA/NA HPD/ND 14 4.99k

12 INV A

INV D 13

RL3

14.7k

RH3

40.2k

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

1

24-Lead Package

Gain vs Frequency

10

FREQUENCY (kHz)

100

1068 TA16

1068 TA15

FilterCAD Custom Inputs for fC = 10kHz

2nd ORDER SECTION f0 (kHz)

Q

fN (kHz) TYPE MODE

B

8.2199 2.6702 4.4025

HPN

3a

C

9.9188 3.3388

BP

1b

A

8.7411 2.1125 21.1672 LPN

3a

D

11.3122 5.0830

BP

1b

1068fc

22

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