Datasheet

LT1115
10
1115fa
NOTE 3: FOR BETTER NOISE PERFORMANCE AT
SLIGHTLY LESS DRIVE CAPABILITY: R1 = 43Ω,
R2 = 392Ω DELETE C1.
–
+
–
+
INPUT
18V
–18V
–18V
–18V
18V
18V
1µF
35V
1µF
35V
1µF
35V
1µF
35V
1µF
35V
1µF
35V
1µF
2N4304*
IN
100Ω
100Ω
100k
100k
~250Ω
SELECT
FOR 2mA
V
+
V
–
OUTPUT
R2
3
3
4
4
2
2
7
7
R
BOOST
49.9Ω
6
6
8
1
C1
33pF
33.2k
1%
33.2k
1%
1µF
R
L
909Ω
R1
LT1115
LT1010CT
LT1097
LT1115 • TA05
RESISTORS 1% METAL FILM
CAPACITORS – BYPASS; LOWER ESR
OTHER: POLYESTER OR OTHER
HIGH QUALITY FILM.
*OR USE 2mA CURRENT SOURCE.
NOTE 1: USE SINGLE POINT GROUND.
NOTE 2: USE ≥ 470µF CAPACITORS AT EACH
INCOMING SUPPLY TERMINAL (I.E. AT BOARD EDGE).
OPTIONAL SERVO LOOP
LOWERS OFFSET TO < 50µV
+
+
+
+
+
2mA
+
Figure 2. Low Noise DC Accurate x 10 Buffered Line Amplifier
THD + Noise vs Frequency
(Figure 2)
FREQUENCY (Hz)
20
0.0001
0.001
0.010
100
1k
20k
TOTAL HARMONIC DISTORTION + NOISE (%)
T
A
= 25
°
C
V
S
= ± 18V
V
IN
= 500mV
RMS
V
OUT
= 5V
RMS
R
S
= 10Ω
R
L
= 600Ω
LT1115 • TA07
TYPICAL APPLICATIO S
U