LT1684IS Linear Technology, LT1684IS Datasheet
LT1684IS
Specifications of LT1684IS
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LT1684IS Summary of contents
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... This “active tracking” supply mode of operation allows linear generation of the high voltage ring tone signal, reducing the need for large high voltage filtering elements. , LTC and LT are registered trademarks of Linear Technology Corporation. Electrically Isolated Ring Tone Generator 6.8nF 100k ...
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... Operating Junction Temperature Range Commercial Grade ................................. 125 0.3V) Industrial Grade ................................ – 125 C Storage Temperature Range ................. – 150 0.3V) Lead Temperature (Soldering, 10 sec).................. 300 0.3V OUT 12 AMPIN + 11 GATE + LIM 8 OUT – Current .......................................... – 350mA – Current ....................................... 20mA ORDER PART NUMBER LT1684CN LT1684CS LT1684IN LT1684IS ...
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ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are – V – 20V, Voltages referenced to pin OUT, V SYMBOL PARAMETER Supply and Protection I DC Supply ...
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LT1684 W U TYPICAL PERFOR A CE CHARACTERISTICS + – DC Supply Current vs V – V 740 720 700 IN A – 1.6V 680 660 IN A – –1.6V 640 ...
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CTIO (Pin 1): PWM Negative Input. Input is isolated from digital source by ~100pF series capacitor. A 10k resistor can be connected to the IN B pin in series with the isolation ...
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LT1684 CTIO S BG (Pin 13): Normalized PWM Buffered Output. PWM OUT differential input is amplitude normalized to 1.25V (refer- enced to the OUT pin). This signal is used to drive the active filter/amplifier. Filter ...
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... OUT pin) of 1.25V that follows the PWM input. This switched voltage is driven off-chip on pin BG the IN A input is driven higher than IN B (by the required * Contact Linear Technology for code. 1.6V), the reference drives BG When IN B input is driven higher than –1.25V relative to OUT. ...
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LT1684 U U APPLICATIO S I FOR ATIO Encoded PWM Signal Input Basics The LT1684 accepts a user-supplied PWM carrier that represents the desired output ring tone signal. This PWM input is normalized by the LT1684 such that ring tone ...
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U U APPLICATIO S I FOR ATIO For applications that are extremely output ripple sensitive, additional carrier rejection can be accomplished by modi- fying the output filter/amplifier characteristics such as implementing elliptical filter characteristics with a lower cutoff frequency or ...
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LT1684 U U APPLICATIO S I FOR ATIO The component selections for the active tracking supply lowpass MFB filter configuration follow the relations [4Q (1+| 1 [1–4mQ ...
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U U APPLICATIO S I FOR ATIO Active Filter Tuned Oscillator Block Diagram The LT1684 can be implemented easily into a telephone ringer circuit based on the active filter tuned oscillator topology, eliminating the need for a user-supplied PWM input ...
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LT1684 U U APPLICATIO S I FOR ATIO 110V 1/2 LT1017 – V – 4 R10 10k 100pF 2 COMP1 BG OUT C1 20pF 3 COMP2 AMPIN LT1684 4 ...
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U TYPICAL APPLICATIO S LT1684 13 ...
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LT1684 U TYPICAL APPLICATIO S 120V 6800pF 100k 100 11 1000pF + 10k GATE PWM COMP1 1000pF 10k IN 1 LIM IN B OUT LT1684 OUT COMP2 LIM AMPIN – ...
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... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Thermal Runaway 2500V Isolation, UL Recognized RMS V = 3.5V to 30V 7mA 3.5V to 30V 7mA IN Q Operation Up to 60V, Output Current Up to 50A Operation Up to 60V, 100kHz 500mA Output 1684f LT/TP 0300 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 D5 R14 1M R13 12k 1684 TA02 ...