LT1115_15 Datasheet, PDF (9/16 Pages) Linear Technology – Ultralow Noise, Low Distortion, Audio Op Amp

TYPICAL APPLICATIO S
LT1115
INPUT
R1
1k, 0.1%
R_P
30k
1%
R2
1k, 0.1%
R3
316k, 0.1%
18V
+
2_– 7
LT1115
3₊
4
–18V
1µF 35V
LOW ESR
6
1µF 35V
LOW ESR
R4
316k, 0.1%
4.7µF
FILM
100
1%
OUT
10k
1%
NOTE: MATCH RESISTOR PAIRS
R1
R2
=
R3
R4
TO ± 0.1%
LT1115 • TA03
Figure 1. Balanced Transformerless Microphone Preamp
THD + Noise vs Frequency
(Figure 1)
1
T_A = 25^°C
R_L = 100kΩ
V_IN = 10mV_RMS
V_OUT = 2.92V_RMS
R_S = 150Ω
0.1
0.010
20
100
1k
FREQUENCY (Hz)
20k
LT1115 • TA04
1115fa
9