LTC1068-50CG View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1068-50CG

Clock-Tunable, Quad Second Order, Filter Building Blocks

Linear Technology 

TYPICAL APPLICATIONS

LTC1068-50 8th Order Linear Phase Bandpass, fCENTER = fCLK/40,

Passband –3dB at (0.8)(fCENTER) and (1.2)(fCENTER) for Single Supply

Low Power Applications. Maximum fCENTER = 25kHz with a Single 5V

Supply

R21 10k

R11 36.5k

VIN

R31 30.1k

R41 10.7k

R61

R51

1.74k 4.99k

5V

1µF 0.1µF

R43 12.1k

R33 26.7k

R23 10k

RL3

15.8K

RH1 18.2k

1 INV B

2

HPB/NB

INV C 28

27

HPC/NC

3 BPB

4 LPB

BPC 26

LPC 25

5 SB

SC 24

6 NC LTC1068-50 V– 23

7

AGND

NC 22

8 V+

CLK 21

9 NC

10 SA

20

NC

19

SD

11 LPA

LPD 18

12 BPA

13 HPA/NA

14 INV A

BPD 17

16

HPD/ND

15

INV D

RH3 47.5k

RL2 17.8k

RH2 84.5k

R22 11.3k

R32 29.4k

R42 10k

R44 22.1k

R34 28k

R24 10k

400kHz

1068 TA21

VOUT

LTC1068 Series

Gain vs Frequency

10

0

–10

–20

–30

–40

–50

–60

–70

–80

2 4 6 8 10 12 14 16 18 20 22 24 26 28

FREQUENCY (kHz)

1068 TA22

FilterCAD Custom Inputs for fC = 10kHz

2nd ORDER SECTION f0 (kHz)

Q

fN (kHz) TYPE MODE

B

8.7384 4.0091 4.0678

HPN

2b

C

11.6756 4.6752 19.1786 LPN

2n

A

10.8117 4.2066 16.0127 LPN

2n

D

9.6415 3.6831

BP

2

1068fc

25

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