LTC6241/LTC6242

24

62412f

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

© LINEAR TECHNOLOGY CORPORATION 2005

LT/TP 0605 500 • PRINTED IN USA

1kHz

101kHz

10kHz/DIV

6241 TA02b

0V

1kHz

101kHz

6241 TA02c

10kHz/DIV

0V

TYPICAL APPLICATIO

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LTC1151

±15V Zero-Drift Op Amp

Dual High Voltage Operation ±18V

LT1792

Low Noise Precision JFET Op Amp

6nV/√Hz Noise, ±15V Operation

LTC2050

Zero-Drift Op Amp

2.7 Volt Operation, SOT-23

LTC2051/LTC2052

Dual/Quad Zero-Drift Op Amp

Dual/Quad Version of LTC2050 in MS8/GN16 Packages

LTC2054/LTC2055

Single/Dual Zero-Drift Op Amp

Micropower Version of the LTC2050/LTC2051 in SOT-23 and DD Packages

Figure 11. Ultralow Noise 1MΩ 150kHz Photodiode Amplifier

LTC6241 Output Noise Spectrum. 1MΩ Resistor Noise

Dominates; Ideal Performance

Competition Output Noise Spectrum. Op Amp Noise Dominates;

Performance Compromised

R2

1.69k

C3

180pF

C1

1500pF

+1.5V

–1.5V

–1.5V

SFH213FA

OR EQUIVALENT

(

≤4pF)

6241 TA02a

1M

Ω

R1

866

Ω

–

+

1/2

LTC6241

–

+

1/2

LTC6241

C2

1500pF

1pF

1M

Ω TIA

150kHz 3RD ORDER BUTTERWORTH FILTER

R3

2k