Datasheet

LT1115
12
1115fa
Deviation from RIAA Response
Input at 1kHz = 232µV
RMS
Pre-Emphasized (Figure 4)
Figure 4. Moving Coil Passive RIAA Phonograph Pre-Amp
THD + Noise vs Frequency
Input at 1kHz = 232µV
RMS
Pre-Emphasized (Figure 4)
FREQUENCY (Hz)
20
TOTAL HARMONIC DISTORTION + NOISE (%)
0.010
100
1k
20k
0.001
0.1
V
S
= ±18V
R
L
= 100k
R
S
= 10Ω
T
A
= 25
°
C
LT1115 • TA12
DEVIATION (dB)
FREQUENCY (Hz)
20
–0.5000
0.50000
0.40000
0.30000
0.20000
0.10000
–0.4000
–0.3000
–0.2000
–0.1000
0.0
100
1k
20k
LT1115 • TA11
V
S
= ±18V
R
L
= 100k
R
S
= 10Ω
T
A
= 25°C
–
+
–
+
1µF
35V
1µF
35V
1µF
35V
470µF
35V
470µF
35V
1µF
35V
R2
C1
C2
0.483µF
100pF
2.49k
R1
6081Ω
100Ω
499Ω
490Ω
499Ω
100k
10k
12.1Ω
OUTPUT
3
2
7
6
4
3
2
7
6
4
RIAA NETWORK
MOVING COIL
INPUT
0.01µF
18V
–18V
4.7µFFILM
0.1645µF
RESISTORS 1% METAL FILM
CAPACITORS—BYPASS: LOW ESR
OTHER: HIGH QUALITY FILM
NOTE 1: 1kHz GAIN = 53dB
NOTE 2: IN RIAA NETWORK VALUES SHOWN
ARE MEASURED AND PRODUCE THE
“DEVIATION FROM RIAA” GRAPH SHOWN.
THE CALCULATED EXACT VALUES ARE:
R1-6249Ω C1-0.161µF
R2-504Ω C2-0.47µF
LT1115
LT1056
LT1115 • TA10
+
+
+
+
+
+
TYPICAL APPLICATIO S
U