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LTC6992-1/LTC6992-2/

LTC6992-3/LTC6992-4

Rev. D

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Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC6992C is guaranteed functional over the operating

temperature range of –40°C to 85°C.

Note 3: The LTC6992C is guaranteed to meet specified performance from

0°C to 70°C. The LTC6992C is designed, characterized and expected to

meet specified performance from –40°C to 85°C but it is not tested or

QA sampled at these temperatures. The LTC6992I is guaranteed to meet

specified performance from –40°C to 85°C. The LTC6992H is guaranteed

to meet specified performance from –40°C to 125°C. The LTC6992MP is

guaranteed to meet specified performance from –55°C to 125°C.

Note 4: Frequency accuracy is defined as the deviation from the fOUT

equation, assuming RSET is used to program the frequency.

Note 5: See Operation section, Table 1 and Figure 2 for a full explanation

of how the DIV pin voltage selects the value of DIVCODE.

Note 6: Duty cycle settling time is the amount of time required for the

output to settle within ±1% of the final duty cycle after a ±10% change in

the setting (±80mV step in VMOD).

Note 7: To conform to the Logic IC Standard, current out of a pin is

arbitrarily given a negative value.

Note 8: Output rise and fall times are measured between the 10% and the

90% power supply levels with 5pF output load. These specifications are

based on characterization.

Note 9: Jitter is the ratio of the peak-to-peak deviation of the period to the

mean of the period. This specification is based on characterization and is

not 100% tested.

Note 10: Long-term drift of silicon oscillators is primarily due to the

movement of ions and impurities within the silicon and is tested at 30°C

under otherwise nominal operating conditions. Long-term drift is specified

as ppm/√kHr due to the typically nonlinear nature of the drift. To calculate

drift for a set time period, translate that time into thousands of hours, take

the square root and multiply by the typical drift number. For instance, a

year is 8.77kHr and would yield a drift of 266ppm at 90ppm/√kHr. Drift

without power applied to the device may be approximated as 1/10th of the

drift with power, or 9ppm/√kHr for a 90ppm/√kHr device.

ELECTRICAL CHARACTERISTICS

TYPICAL PERFORMANCE CHARACTERISTICS

Frequency Error vs Temperature

V+ = 3.3V, RSET = 200k, and TA = 25°C, unless

otherwise noted.

TEMPERATURE (°C)

–50

–3

100 125

–1

–2

–25

6992 G01

RSET = 50k

3 PARTS

GUARANTEED MAX OVER TEMPERATURE

GUARANTEED MIN OVER TEMPERATURE

TEMPERATURE (°C)

–50

–3

100 125

–1

–2

–25

6992 G02

RSET = 200k

3 PARTS

GUARANTEED MAX OVER TEMPERATURE

GUARANTEED MIN OVER TEMPERATURE

TEMPERATURE (°C)

–50

–3

100 125

–1

–2

–25

6992 G03

RSET = 800k

3 PARTS

GUARANTEED MAX OVER TEMPERATURE

GUARANTEED MIN OVER TEMPERATURE

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