LTC6907 Linear Technology, LTC6907 Datasheet
LTC6907
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LTC6907 Summary of contents
Page 1
... The LTC is versatile, compact and easy to use. Micropower opera- tion benefits portable and battery-powered equipment. At 400kHz, the LTC6907 consumes 36µ supply. A single resistor programs the oscillator frequency over a 10:1 range with better than 0.65% initial accuracy. The output frequency can be divided span a 100:1 total frequency range, 40kHz to 4MHz ...
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... 3.6V 5pF, Pin CONDITIONS = 3V to 3.6V 400kHz ≤ f ≤ 4MHz + V 400kHz ≤ f ≤ 4MHz, LTC6907C 400kHz ≤ f ≤ 4MHz, LTC6907I 158k SET = 3V to 3.6V, 50k ≤ R ≤ 500k + V SET , 50k ≤ R ≤ 500k + ...
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... I ≤ 0.3µA GRD Note 7: The LTC6907C is guaranteed to meet specified performance from 0°C to 70°C. The LTC6907C is designed, characterized and expected to meet specified performance from –40°C to 85°C but is not tested or QA sampled at these temperatures. The LTC6907I is guaranteed to meet specified performance from – ...
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... LTC6907 www.DataSheet4U.com W TYPICAL PERFOR A CE CHARACTERISTICS Typical Frequency Error vs Power Supply Voltage 0.060 25°C C LOAD 0.040% 0.020% 0.000% –0.020% –0.040% R SET R SET –0.060% 3 3.2 3.3 3.4 3.1 SUPPLY VOLTAGE (V) Typical Supply Current vs Frequency 1000 C = 5pF LOAD T = 25°C 3.3V, –1 : 3.3V, –3 : 3.3V, –10 ...
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... N in the frequency equation. Tie to GND for ÷1, leave floating for ÷3 and tie to V floating, the LTC6907 pulls Pin 3 to mid-supply with a 2.5M resistor. When Pin 3 is floating, care should be taken to reduce coupling from the OUT pin and its trace to Pin 3. ...
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... GND 2 6907 F02 + Figure 2. V Pin + V 6 DIV 3 GND 2 Figure 5. DIV Pin 6 EQUIVALENT CIRCUIT OF OSCILLOSCOPE OR FREQUENCY COUNTER PROBE C TEST LTC6907 + V OUT 0.1µF GND GRD C PROBE DIV SET R SET 0.01% 10ppm/° 1/(1/5pF – 1/C ) TEST PROBE = 7.5pF FOR A 15pF SCOPE PROBE Figure 1. Test Circuit with 5pF Effective Load ...
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... SET t • C OSC OSC ƒ I OSC SET This is the fundamental equation for the LTC6907. It holds regardless of how the SET pin is driven. When a resistor connected from the SET pin to ground, we have SET the relationship SET R SET I SET Table 1. Output Frequency Equations ...
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... Effective cleaning is a good first step to minimizing leakage. Another effective method for controlling leakage is to shunt the leakage current away from the sensitive node through a low impedance path. The LTC6907 provides a signal on the GRD pin for this purpose. Figure 10 shows a PC board 10000 ÷1 ÷ ...
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... SET pin and the guard ring generates no leakage current. Start-Up Time When the LTC6907 is powered up, it holds the OUT pin low. After the master oscillator has settled, the OUT pin is enabled and the first output cycle is accurate. The time ...
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... APPLICATIO S I FOR ATIO Alternative Methods for Setting the Output Frequency Any means of sinking current from the SET pin will control the output frequency of the LTC6907. Equation 2 (re- peated below) gives the fundamental relationship between frequency and the SET pin voltage and current: ...
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... MIN (NOTE 4) 0.80 – 0.90 1.00 MAX 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 LTC6907 2.90 BSC (NOTE 4) PIN ONE ID 0.30 – 0.45 0.95 BSC 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 6907fa ...
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... Q1B ÷64 100k R21 20k 12 Q2B SS ÷128 13 Q3B ÷256 14 Q4B f OSC 64 CLOCK-TUNABLE LOWPASS FILTER WITH A STOPBAND NOTCH AT THE 3rd HARMONIC www.linear.com ● Trimming the Frequency LTC6907 + 3V TO 3.6V V OUT 40kHz TO 4MHz 0.1µF OUT GND GRD GRD DIV SET SET < ...