LT1633CS datasheet(16/16 Pages) LINER

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LT1632/LT1633

16323f LT/TP 0998 4K • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900q FAX:(408)434-0507 q www.linear-tech.com

TYPICAL APPLICATION

1/2 LT1632

VIN

VOUT

1632/33 F05

R11

10k

R10

10k

500

Ω

1.62k

1000pF

–

1/2 LT1632

4.7

µF

4.7

µF

2.2

µF

Figure 5. Tunable Q Notch Filter

PART NUMBER

DESCRIPTON

COMMENTS

LT1211/LT1212

Dual/Quad 14MHz, 7V/

µs, Single Supply Precision Op Amps

Input Common Mode Includes Ground, 275

µV VOS(MAX),

µV/°C Max Drift, Max Supply Current 1.8mA per Op Amp

LT1213/LT1214

Dual/Quad 28MHz, 12V/

µs, Single Supply Precision Op Amps

Input Common Mode Includes Ground, 275

µV VOS(MAX),

µV/°C Max Drift, Max Supply Current 3.5mA per Op Amp

LT1215/LT1216

Dual/Quad 23MHz, 50V/

µs, Single Supply Precision Op Amps

Input Common Mode Includes Ground, 450

µV VOS(MAX),

µV/°C Max Drift, Max Supply Current 6.6mA per Op Amp

LT1498/LT1499

Dual/Quad 10MHz, 6V/

µs Rail-to-Rail Input and Output

High DC Accuracy, 475

µV VOS(MAX), 4µV/°C Max Drift,

C-Load

TM Op Amps

Max Supply Current 2.2mA per Amp

LT1630/LT1631

Dual/Quad 30MHz, 10V/

µs Rail-to-Rail Input and Output Op Amps

High DC Accuracy, 525

µV VOS(MAX), 70mA Output Current,

Max Supply Current 4.4mA per Amp

C-Load is a trademark of Linear Technology Corporation.

RELATED PARTS

CpF

ODC

162

1000

()

Tunable Q Notch Filter

A single supply, tunable Q notch filter as shown in Figure

5 is built with LT1632 to maximize the output swing. The

filter has a gain of 2, and the notch frequency (fO) is set by

the values of R and C. The resistors R10 and R11 set up the

DC level at the output. The Q factor can be adjusted by

varying the value of R8. The higher value of R8 will

decrease Q as depicted in Figure 6, because the output

induces less of feedback to amplifier A2. The value of R7

should be equal or greater than R9 to prevent oscillation.

If R8 is a short and R9 is larger than R7, then the positive

feedback from the output will create phase inversion at the

output of amplifier A2, which will lead to oscillation.

FREQUENCY (kHz)

–20

–40

13632/33 F06

20 40 60

140 160 180 200

80 100 120

INCREASING R8

DECREASING R8

Figure 6. Frequency Response

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