Datasheet LT1115 (Analog Devices) - 13
| Manufacturer | Analog Devices |
| Description | Ultra-Low Noise, Low Distortion, Audio Op Amp |
| Pages / Page | 16 / 13 — TYPICAL APPLICATIO S. Figure 5. High Performance Transformer Coupled … |
| File Format / Size | PDF / 252 Kb |
| Document Language | English |
TYPICAL APPLICATIO S. Figure 5. High Performance Transformer Coupled Microphone Pre-Amp. Risetime of High Performance
Model Line for this Datasheet
Text Version of Document
LT1115
U TYPICAL APPLICATIO S
470µF 35V 18V + 2.5k + + REV. AUDIO 1µF 1µF TAPER 35V 49.9Ω 35V 1N4002 100pF 4.99Ω V+ OPTIONAL 2 SINGLE-ENDED TO – 7 22Ω 2.49k BALANCED OUTPUT 100 BOOST Ω 6 IN 10Ω TRANSFORMER LT1115 LT1010CT RED YELLOW 100Ω 3 + OUT BRN 4 2N4304** V – 150Ω RED YEL ~ 250 MICROPHONE Ω 6.19k 2mA INPUT SELECT FOR 2mA BRN ORANGE JENSEN JE-11-BM BLK 1µF 470µF 1µF WHT 35V + 35V + 35V RESISTORS 1% METAL FILM CASE + CAPACITORS—BYPASS: LOW ESR JENSEN 1N4002 OTHER: HIGH QUALITY FILM JE-16-A/B –18V NOTE: USE SINGLE POINT GROUND 18V *JENSEN NETWORK VALUES—FACTORY SELECTED. + 1µF 1µF JE-16-A/B & JE-11-BM AVAILABLE FROM: 35V 7 – 100k 2 JENSEN TRANSFORMERS 10735 BURBANK BLVD. 10k 6 N. HOLLYWOOD, CA 91601 LT1097 + (213) 876-0059 3 **OR USE 2mA CURRENT SOURCE 4 10Ω 1 LT1115 • TA13 µF 100k 1µF 35V + –18V
Figure 5. High Performance Transformer Coupled Microphone Pre-Amp Risetime of High Performance THD + Noise vs Frequency Frequency Response Transformer Coupled Microphone (Gain = 20dB) Balanced In/ (Gain = 20dB) Balanced In/ Pre-Amp (Figure 5) Balanced Out (Figure 5) Balanced Out (Figure 5)
1 1.0000 VS = ±18V VIN = 0.95VRMS RL = 600Ω 0.0 RS = 150Ω 0.1 TA = 25°C – 1.000 – 2.000 0.010 – 3.000 VS = ±18V VIN = 0.95VRMS R – 4.000 L = 600Ω AMPLITUDE (dB) REFERRED TO 1kHz RS = 150Ω RISETIME OF PRE-AMP 0.001 TOTAL HARMONIC DISTORTION + NOISE (%) TA = 25°C AV = 20dB 0.0005 – 5.000 VIN = 400mV 2kHz SQUARE WAVE MEASURED AT SINGLE- 20 100 1k 20k 10 100 1k 10k 100k ENDED OUTPUT BEFORE TRANSFORMER FREQUENCY (Hz) FREQUENCY (Hz) LT1115 • TA15 LT1115 • TA16 1115fa 13
U TYPICAL APPLICATIO S
470µF 35V 18V + 2.5k + + REV. AUDIO 1µF 1µF TAPER 35V 49.9Ω 35V 1N4002 100pF 4.99Ω V+ OPTIONAL 2 SINGLE-ENDED TO – 7 22Ω 2.49k BALANCED OUTPUT 100 BOOST Ω 6 IN 10Ω TRANSFORMER LT1115 LT1010CT RED YELLOW 100Ω 3 + OUT BRN 4 2N4304** V – 150Ω RED YEL ~ 250 MICROPHONE Ω 6.19k 2mA INPUT SELECT FOR 2mA BRN ORANGE JENSEN JE-11-BM BLK 1µF 470µF 1µF WHT 35V + 35V + 35V RESISTORS 1% METAL FILM CASE + CAPACITORS—BYPASS: LOW ESR JENSEN 1N4002 OTHER: HIGH QUALITY FILM JE-16-A/B –18V NOTE: USE SINGLE POINT GROUND 18V *JENSEN NETWORK VALUES—FACTORY SELECTED. + 1µF 1µF JE-16-A/B & JE-11-BM AVAILABLE FROM: 35V 7 – 100k 2 JENSEN TRANSFORMERS 10735 BURBANK BLVD. 10k 6 N. HOLLYWOOD, CA 91601 LT1097 + (213) 876-0059 3 **OR USE 2mA CURRENT SOURCE 4 10Ω 1 LT1115 • TA13 µF 100k 1µF 35V + –18V
Figure 5. High Performance Transformer Coupled Microphone Pre-Amp Risetime of High Performance THD + Noise vs Frequency Frequency Response Transformer Coupled Microphone (Gain = 20dB) Balanced In/ (Gain = 20dB) Balanced In/ Pre-Amp (Figure 5) Balanced Out (Figure 5) Balanced Out (Figure 5)
1 1.0000 VS = ±18V VIN = 0.95VRMS RL = 600Ω 0.0 RS = 150Ω 0.1 TA = 25°C – 1.000 – 2.000 0.010 – 3.000 VS = ±18V VIN = 0.95VRMS R – 4.000 L = 600Ω AMPLITUDE (dB) REFERRED TO 1kHz RS = 150Ω RISETIME OF PRE-AMP 0.001 TOTAL HARMONIC DISTORTION + NOISE (%) TA = 25°C AV = 20dB 0.0005 – 5.000 VIN = 400mV 2kHz SQUARE WAVE MEASURED AT SINGLE- 20 100 1k 20k 10 100 1k 10k 100k ENDED OUTPUT BEFORE TRANSFORMER FREQUENCY (Hz) FREQUENCY (Hz) LT1115 • TA15 LT1115 • TA16 1115fa 13