LT1115_15 Datasheet, PDF (10/16 Pages) Linear Technology – Ultralow Noise, Low Distortion, Audio Op Amp

LT1115
TYPICAL APPLICATIO S
18V
+
INPUT ³ +
7
6
R1
LT1115
100Ω _{2 –}
8
1
4
–18V
1µF
35V
18V
49.9Ω
1µF
R_BOOST
+ _1µF
35V
35V
100Ω
V⁺ OUTPUT
R_L
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
T_A = 25^°C
V_S = ± 18V
V_IN = 500mV_RMS
V_OUT = 5V_RMS
R_S = 10Ω
R_L = 600Ω
0.001
10
0.0001
20
100
1k
FREQUENCY (Hz)
20k
LT1115 • TA07
1115fa