Features: ·FCC approved method of EMI attenuation. ·Provides up to 15dB of EMI suppression. ·Generates a low EMI spread spectrum clock of the input frequency. ·Input frequency range: 30MHz to 75 MHz. ·Optimized for 32.5MHz, 54MHz, and 65MHz. ·Internal loop filter minimizes external components and ...
L2042A: Features: ·FCC approved method of EMI attenuation. ·Provides up to 15dB of EMI suppression. ·Generates a low EMI spread spectrum clock of the input frequency. ·Input frequency range: 30MHz to 75 MHz...
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The L2042A is targeted towards digital flat panel applications for Notebook PCs, Palm-size PCs, office automation equipment, and LCD monitors.
Symbol |
Parameter |
Rating |
Unit |
VDD ,V IN |
Voltage on any pin with respect to GND |
-0.5 to + 7.0 |
V |
TSTG |
Storage temperature |
-65 to +125 |
|
TA |
Operating temperature |
0 to 70 |
|
Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. |
The L2042A is a versatile spread spectrum frequency modulator designed specifically for digital falt panel applications. The L2042A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The L2042A allows significant system cost savings by reducing the number of circuit board layers ferrite beads, shielding and other passive components that are traditionally required to pass EMI regulations.
The L2042A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method.
The L2042A modulates the output of a single PLL in order to !°spread!± the bandwidth of a synthesized clock nd more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal!s bandwidth is called !(R)sprea pectrum clock generation!.