1 Features
• Easy-to-use evaluation board to fan out low-phase noise clocks
• Supports output frequencies of up to 2 GHz
• Simple, fast device configuration and setup
• I2C programmable with
GUI available
• Single supply input powered at either 1.8 V, 2.5 V, or 3.3 V
• Differential or single-ended input clocks accepted
• EVM supports 8 differential LVDS outputs.
2 General Description
The LMK1D1208I is an I2C-programmable clock buffer that delivers 8 differential LVDS outputs. This device has
two universal input buffers which support differential or single-ended clock inputs that can be selected through
I2C programming. The device also features on-chip bias generators that can provide LVDS common-mode
voltage for AC-coupled differential clock inputs.
The I2C capabilities of this device can be evaluated by connecting a micro-USB cable to the computer and
interfacing with the
This fully assembled and factory-tested evaluation board allows complete validation of device functionalities.
For optimum performance, the board is equipped with SMA connectors and well-controlled, 50-Ω impedance,
microstrip transmission lines.
3 Signal Path and Control Circuitry
The LMK1D1208I supports single-ended inputs up to 250 MHz and differential inputs up to 2 GHz. Each device
provides up to 8 LVDS outputs that operate at the selected input frequency.
For more information, see the
LMK1D1208I I2C Configurable Low Additive Jitter LVDS Buffer
(SNAS828) for details.
Features
SNAU270 – FEBRUARY 2022
LMK1D1208IEVM User's Guide
3
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