12

LTC1541/LTC1542

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©LINEAR TECHNOLOGY CORPORATION 2005

LT 1105 REV D • PRINTED IN USA

PART NUMBER

DESCRIPTION

COMMENTS

LT

Dual/Quad Micropower, Single Supply Precision Op Amps

70

Slew Rate, Input/Output Common Mode Includes Ground

LT1178/LT1179

Dual/Quad 17

µA Max, Single Supply Precision Op Amps

70

Slew Rate, Input/Output Common Mode Includes Ground

LT1490/LT1491

Dual/Quad Micropower Rail-to-Rail Input and Output Op Amps Single Supply Input Range: – 0.4V to 44V, Micropower 50

µA

Amplifier, Rail-to-Rail Input and Output, 200kHz GBW

LT1635

Micropower Rail-to-Rail Op Amp and Reference

130

LT2078/LT2079

Dual/Quad Micropower, Single Supply Precision Op Amps

SO-8 and 14-Lead Standard Pinout, 70

LT2178/LT2179

Dual/Quad 17

µA Max, Single Supply Precision Op Amps

SO-8 and 14-Lead Standard Pinout, 70

RELATED PARTS

TYPICAL APPLICATIO S

R1

220

Ω

0.25W

+

–

+

–

2

1

3

6

7

8

5

4

R1

1M

Q2

2N3906

Q1

FZT2907A

6V

300mA

SHUTDOWN

IC1

LTC1541

1541/42 TA07

R4

100k

1%

R3

3.83k

1%

R7

0.15

Ω

R5

2.2M

R8

249k

0.5%

300mA

4.2V FLOAT

Li-ION

C3

0.01

µF

C1

4700pF

D1

1N5817

C2

0.1

µF

R6

33k

R9

100k

0.5%

×1

Linear Lithium-Ion Charger

Voltage Control Oscillator

–

+

1

4

8

LTC1542

OP AMP

2

3

7

6

5

5V

0V

1541/42 TA03

–

+

R4

5M

1M

1M

R2

150k

R1

300k

R4

1.1M

VN2222

VN2222

C1

0.047

µF

R3

500k

FREQ

≈

VALUES SHOWN ARE FOR

LTC1542

COMP

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

–

+

1

4

8

2

3

7

5

6

1541/42 TA04

–

+

LTC1542

OP AMP

LTC1542

COMP

5M

5M

0.1

µF

R2

500k

R1

10M

R3

5M

FREQ

≈

R1

4C • R2 • R3

3V TO 12V

Single Supply Function Generator

1541/42 TA05

+

–

LTC1542

OP AMP

–3V

3V TO 9V

–2.5V

1

4

8

2

3

200k

LT1634-2.5

Negative Reference