7

LT1126/LT1127

S

APPLICATI

TYPICAL

S

A

CHE

TI

I

CD AGRA

Low Noise, Wideband, Gain = 100 Amplifier with High Input Impedance

(1/2 LT1126, 1/4 LT1127)

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

LT1126 • TA06

200

µA

100

µA

200

6k

200

6k

50

200

µA

100

µA

OUTPUT

Q12

Q11

Q15

Q16

Q22

Q23

Q24

Q2B

Q1B

Q1A

INVERTING

INPUT (–)

NON-INVERTING

INPUT (+)

Q10

Q3

Q9

Q7

21k

21k

200pF

3.6k

Q17

Q19

Q20

3.6k

Q18

360

µA

20pF

5pF

400

67pF

Q2A

570

µA

Q25

Q26

Q27

20

20

Q30

Q29

Q28

Q13

Q8

LT1126 • TA05

–

+

–

+

–

+

1.1k

1.1k

1.1k

2.4k

2.4k

2.4k

7.5k

500

Ω

1/4

LT1127

OUTPUT

1/4

LT1127

1/4

LT1127

1/4

LT1127

120

120

120

INPUT

–3dB BANDWIDTH = 910 kHz

GAIN BANDWIDTH PRODUCT = 91.0MHz

WIDEBAND NOISE =

= 1.85nV/

√Hz REFERRED TO INPUT

RMS NOISE DC TO FULL BANDWIDTH = 21.2

µV REFERRED TO INPUT

3.2nV/

√Hz

√3

–

+