LMK3C0105-Q1中文资料采用体声波 (BAW) 技术的汽车级 5 路输出无基准时钟发生器数据手册TI规格书

描述 Description

The LMK3C0105-Q1 is a 5-output reference-less clock generator with SSC support. The device is based on TI proprietary Bulk Acoustic Wave (BAW) technology and provides ±25ppm clock outputs without any crystal or external clock reference. The device can provide 5 SSC clocks, 5 non-SSC clocks, or mixed SSC and non-SSC clocks at the same time. Up to three different output frequencies can be generated across the five outputs. Each output channel can select either FOD as the frequency source to generate four LVCMOS clocks; the REF_CTRL pin functions as a fifth LVCMOS clock output, and can select either FOD as the source.

The device can be easily configured through either GPIO pins or the I2C interface. The LMK3C0105-Q1 has very good PSNR and does not require any external LDO. Refer to Power Supply Recommendations for detailed guidelines on power supply filtering and sourcing from a DC/DC supply.

特性 Features

AEC-Q100 Grade 2 qualified for automotive applications

Integrated BAW resonator, no need for external reference

Flexible frequency generation:

100MHz to 400MHz dual Fractional Output Dividers (FODs)

Two channel dividers: up to three unique output frequencies from 2.5MHz to 200MHz

Example: OUTA/B/C/D/E = 25MHz

Example: OUTA/B = 100MHz, OUTC/D = 50MHz, OUTE = 25MHz



1.8V/2.5V/3.3V LVCMOS outputs supported up to 200MHz

Generation of up to 5 LVCMOS clocks on OUTA through OUTE pins



±25ppm total output frequency stability

2 functional modes: I2C or preprogrammed OTP

–40°C to 105°C ambient temperature.

Functional Safety-Capable:

Documentation available to aid functional safety system design



Mixed SSC and non-SSC output support

Programmable SSC modulation depth

Preprogrammed: –0.1%, –0.25%, –0.3%, and –0.5% down spread

Register programmable: –0.1% to –3% down spread or ±0.05% to ±1.5% center spread



VDD = VDDO = 1.8V/2.5V/3.3V ± 5%

<5ms start-up time

<50ps output-to-output skew when the outputs are from the same FOD

Fail-safe input and VDD pins