|Package | PIN:||QFM (SIA) | 6|
|Temp:||I (-40 to 85)|
- Ultra-Low Noise, High Performance
- Jitter: 90-fs RMS Typical fOUT > 100 MHz onLMK61E07
- PSRR: –70 dBc, Robust Supply Noise Immunity onLMK61E07
- Flexible Output Format on LMK61E07
- LVPECL up to 1 GHz
- LVDS up to 900 MHz
- HCSL up to 400 MHz
- Total Frequency Tolerance of ±25 ppm
- System Level Features
- Glitch-Less Frequency Margining: Up to ±1000 ppm FromNominal
- Internal EEPROM: User Configurable Start-Up Settings
- Other Features
- Device Control: Fast Mode I2C up to 1000kHz
- 3.3-V Operating Voltage
- Industrial Temperature Range(–40ºC to +85ºC)
- 7-mm × 5-mm 8-Pin Package
- Default Frequency:
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Texas Instruments LMK61E07-SIAT
The LMK61E07 family of ultra-low jitter PLLatinumTMprogrammable oscillators use fractional-N frequency synthesizers with integrated VCOs to generatecommonly used reference clocks. The output on LMK61E07 can be configured as LVPECL,LVDS, or HCSL. The device features self start-up from on-chip EEPROM to generate a factoryprogrammed default output frequency, or the device registers and EEPROM settings are fullyprogrammable in-system through I2C serial interface. The device providesfine and coarse frequency margining control through I2C serialinterface, making it a digitally-controlled oscillator (DCXO).
The PLL feedback divider can be updated to adjust the output frequency without spikes orglitches in steps of <1ppb using a PFD of 12.5 MHz (R divider=4, doubler disabled) forcompatibility with xDSL requirements, or in steps of <5.2 ppb using a PFD of 100 MHz (Rdivider=1, doubler enabled) for compatibility with broadcast video requirements. The frequencymargining features also facilitate system design verification tests (DVT), such as standardscompliance and system timing margin testing.