LT1115_1 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT1115_1

Ultralow Noise, Low Distortion, Audio Op Amp

Linear Technology 

LT1115

TYPICAL APPLICATIO S

18V

+

INPUT 3 +

7

6

R1

LT1115

100Ω 2 –

8

1

4

–18V

1µF

35V

18V

49.9Ω

1µF

RBOOST

+ 1µF

35V

35V

100Ω

V+ OUTPUT

RL

C1

LT1010CT

IN

33pF

2N4304*

V–

2mA

~250Ω

SELECT

FOR 2mA

R2

909Ω

–18V

RESISTORS 1% METAL FILM

CAPACITORS – BYPASS; LOWER ESR

OTHER: POLYESTER OR OTHER

1µF HIGH QUALITY FILM.

35V *OR USE 2mA CURRENT SOURCE.

33.2k

33.2k

100k

1%

1%

18V

1µF

1µF +

35V

7

2

6

LT1097

3

OPTIONAL SERVO LOOP

LOWERS OFFSET TO < 50µV

NOTE 1: USE SINGLE POINT GROUND.

NOTE 2: USE ≥ 470µF CAPACITORS AT EACH

INCOMING SUPPLY TERMINAL (I.E. AT BOARD EDGE).

4

100k

1µF

1µF

35V

–18V

LT1115 • TA05

NOTE 3: FOR BETTER NOISE PERFORMANCE AT

SLIGHTLY LESS DRIVE CAPABILITY: R1 = 43Ω,

R2 = 392Ω DELETE C1.

Figure 2. Low Noise DC Accurate x 10 Buffered Line Amplifier

THD + Noise vs Frequency

(Figure 2)

0.010

TA = 25°C

VS = ± 18V

VIN = 500mVRMS

VOUT = 5VRMS

RS = 10Ω

RL = 600Ω

0.001

10

0.0001

20

100

1k

FREQUENCY (Hz)

20k

LT1115 • TA07

1115fa

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