Datasheet LTC6908-1, LTC6908-2 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation |
| Pages / Page | 16 / 4 — ELECTRICAL CHARACTERISTICS. Note 1:. Note 6:. Note 7:. Note 2:. Note 8:. … |
| Revision | B |
| File Format / Size | PDF / 582 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. Note 1:. Note 6:. Note 7:. Note 2:. Note 8:. Note 3:. Note 4:. Note 5:. TYPICAL PERFORMANCE CHARACTERISTICS
Model Line for this Datasheet
- LTC6908CDCB-1#TRMPBF LTC6908CDCB-1#TRPBF LTC6908CDCB-2#TRMPBF LTC6908CDCB-2#TRPBF LTC6908CS6-1#TRMPBF LTC6908CS6-1#TRPBF LTC6908CS6-2#TRMPBF LTC6908CS6-2#TRPBF LTC6908HS6-1#TRMPBF LTC6908HS6-1#TRPBF LTC6908HS6-2#TRMPBF LTC6908HS6-2#TRPBF LTC6908IDCB-1#TRMPBF LTC6908IDCB-1#TRPBF LTC6908IDCB-2#TRMPBF LTC6908IDCB-2#TRPBF LTC6908IS6-1#TRMPBF LTC6908IS6-1#TRPBF LTC6908IS6-2#TRMPBF LTC6908IS6-2#TRPBF
Text Version of Document
LTC6908-1/LTC6908-2
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 6:
To conform to the Logic IC Standard, current out of a pin is may cause permanent damage to the device. Exposure to any Absolute arbitrarily given a negative value. Maximum Rating condition for extended periods may affect device
Note 7:
Output rise and fall times are measured between the 10% and the reliability and lifetime. 90% power supply levels with no output loading. These specifications are
Note 2:
LTC6908C and LTC6908I are guaranteed functional over the based on characterization. operating temperature range of –40°C to 85°C.
Note 8:
Long term drift on silicon oscillators is primarily due to the
Note 3:
LTC6908C is guaranteed to meet specified performance from 0°C movement of ions and impurities within the silicon and is tested at 30°C to 70°C. The LTC6908C is designed, characterized and expected to meet under otherwise nominal operating conditions. Long term drift is specified specified performance from –40°C to 85°C but is not tested or QA sampled as ppm/√kHr due to the typically non-linear nature of the drift. To calculate at these temperatures. The LTC6908I is guaranteed to meet the specified drift for a set time period, translate that time into thousands of hours, take performance limits from –40°C to 85°C. The LTC6908H is guaranteed to the square root and multiply by the typical drift number. For instance, a meet the specified performance limits from –40°C to 125°C. year is 8.77kHr and would yield a drift of 888ppm at 300ppm/√kHr. Ten
Note 4:
Frequency accuracy is defined as the deviation from the f years is 87.7kHr and would yield a drift of 2,809 ppm at 300 ppm/√kHr. OUT equation. Drift without power applied to the device may be approximated as 1/10th
Note 5:
Guaranteed by 5V test of the drift with power, or 30ppm/√kHr for a 300ppm/√kHr device.
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Error vs RSET, Frequency Error vs RSET, V+ = 3V V+ = 5V Frequency Error vs Temperature
5 5 1.00 TA = 25°C TA = 25°C 4 GUARANTEED MAX 4 0.75 3 OVER TEMPERATURE 3 GUARANTEED MAX 0.50 2 2 OVER TEMPERATURE 1 TYPICAL MAX 1 TYPICAL MAX 0.25 0 0 0 TYPICAL MAX –1 TYPICAL MIN –1 –0.25 –2 –2 GUARANTEED MIN FREQUENCY ERROR (%) FREQUENCY ERROR (%) TYPICAL MIN OVER TEMPERATURE FREQUENCY ERROR (%) –0.50 –3 GUARANTEED MIN –3 TYPICAL MIN –4 OVER TEMPERATURE –4 –0.75 –5 –5 –1.00 10k 100k 1M 10M 10k 100k 1M 10M –40 –20 0 20 40 60 80 RSET (Ω) RSET (Ω) TEMPERATURE (°C) 690812 G01 690812 G02 690812 G03
Peak to Peak Jitter vs Output Supply Current vs Output Frequency Frequency Supply Current vs Temperature
1.0 800 CL 5pF ON BOTH OUTPUTS 0.9 2.0 750 FREQUENCY = 1MHz SSFM DISABLED 0.8 700 0.7 5V μA) 1.5 650 0.6 V+ = 5V P-P 0.5 3V 5V SSFM ENABLED 600 1.0 0.4 3V SSFM ENABLED 550 JITTER (% 0.3 SUPPLY CURRENT (mA) SUPPLY CURRENT ( 500 0.5 V+ = 3V 0.2 3V SSFM DISABLED 450 0.1 5V SSFM DISABLED 0 0 400 10k 100k 1M 10M 10k 100k 1M 10M –40 –20 0 20 40 60 80 FREQUENCY (Hz) FREQUENCY (Hz) TEMPERATURE (°C) 690812 G04 690812 G05 690812 G06 Rev B 4 For more information www.analog.com Document Outline Features Applications Description Absolute Maximum Ratings Electrical Characteristics Pin Functions Operation Applications Information Typical Applications Package Description Typical Application
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 6:
To conform to the Logic IC Standard, current out of a pin is may cause permanent damage to the device. Exposure to any Absolute arbitrarily given a negative value. Maximum Rating condition for extended periods may affect device
Note 7:
Output rise and fall times are measured between the 10% and the reliability and lifetime. 90% power supply levels with no output loading. These specifications are
Note 2:
LTC6908C and LTC6908I are guaranteed functional over the based on characterization. operating temperature range of –40°C to 85°C.
Note 8:
Long term drift on silicon oscillators is primarily due to the
Note 3:
LTC6908C is guaranteed to meet specified performance from 0°C movement of ions and impurities within the silicon and is tested at 30°C to 70°C. The LTC6908C is designed, characterized and expected to meet under otherwise nominal operating conditions. Long term drift is specified specified performance from –40°C to 85°C but is not tested or QA sampled as ppm/√kHr due to the typically non-linear nature of the drift. To calculate at these temperatures. The LTC6908I is guaranteed to meet the specified drift for a set time period, translate that time into thousands of hours, take performance limits from –40°C to 85°C. The LTC6908H is guaranteed to the square root and multiply by the typical drift number. For instance, a meet the specified performance limits from –40°C to 125°C. year is 8.77kHr and would yield a drift of 888ppm at 300ppm/√kHr. Ten
Note 4:
Frequency accuracy is defined as the deviation from the f years is 87.7kHr and would yield a drift of 2,809 ppm at 300 ppm/√kHr. OUT equation. Drift without power applied to the device may be approximated as 1/10th
Note 5:
Guaranteed by 5V test of the drift with power, or 30ppm/√kHr for a 300ppm/√kHr device.
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Error vs RSET, Frequency Error vs RSET, V+ = 3V V+ = 5V Frequency Error vs Temperature
5 5 1.00 TA = 25°C TA = 25°C 4 GUARANTEED MAX 4 0.75 3 OVER TEMPERATURE 3 GUARANTEED MAX 0.50 2 2 OVER TEMPERATURE 1 TYPICAL MAX 1 TYPICAL MAX 0.25 0 0 0 TYPICAL MAX –1 TYPICAL MIN –1 –0.25 –2 –2 GUARANTEED MIN FREQUENCY ERROR (%) FREQUENCY ERROR (%) TYPICAL MIN OVER TEMPERATURE FREQUENCY ERROR (%) –0.50 –3 GUARANTEED MIN –3 TYPICAL MIN –4 OVER TEMPERATURE –4 –0.75 –5 –5 –1.00 10k 100k 1M 10M 10k 100k 1M 10M –40 –20 0 20 40 60 80 RSET (Ω) RSET (Ω) TEMPERATURE (°C) 690812 G01 690812 G02 690812 G03
Peak to Peak Jitter vs Output Supply Current vs Output Frequency Frequency Supply Current vs Temperature
1.0 800 CL 5pF ON BOTH OUTPUTS 0.9 2.0 750 FREQUENCY = 1MHz SSFM DISABLED 0.8 700 0.7 5V μA) 1.5 650 0.6 V+ = 5V P-P 0.5 3V 5V SSFM ENABLED 600 1.0 0.4 3V SSFM ENABLED 550 JITTER (% 0.3 SUPPLY CURRENT (mA) SUPPLY CURRENT ( 500 0.5 V+ = 3V 0.2 3V SSFM DISABLED 450 0.1 5V SSFM DISABLED 0 0 400 10k 100k 1M 10M 10k 100k 1M 10M –40 –20 0 20 40 60 80 FREQUENCY (Hz) FREQUENCY (Hz) TEMPERATURE (°C) 690812 G04 690812 G05 690812 G06 Rev B 4 For more information www.analog.com Document Outline Features Applications Description Absolute Maximum Ratings Electrical Characteristics Pin Functions Operation Applications Information Typical Applications Package Description Typical Application
