ds1083l Maxim Integrated Products, Inc., ds1083l Datasheet

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ds1083l

Manufacturer Part Number
ds1083l
Description
16mhz To 134mhz Spread-spectrum Clock Modulator For Lcd Panels
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The DS1083L is a spread-spectrum clock modulator IC
that reduces EMI in high-clock, frequency-based, digi-
tal electronic equipment.
Using an integrated phase-locked loop (PLL), the
DS1083L accepts an input clock signal in the range of
16MHz to 134MHz and delivers a spread-spectrum
modulated output clock signal. The PLL modulates, or
dithers, the output clock about the center input frequen-
cy at a pin-selectable magnitude. The DS1083L auto-
matically adjusts the dither rate based on the input
clock frequency to maximize the EMI reduction.
By dithering the system clock, all the address, data,
and timing signals generated from this signal are also
dithered so that the measured EMI at the fundamental
and harmonic frequencies is greatly reduced. This is
accomplished without changing clock rise/fall times or
adding the space, weight, design time, and cost asso-
ciated with mechanical shielding.
The DS1083L is provided in a low-cost, space-saving,
6-lead thin SOT23 package and operates over a full
automotive temperature range of -40°C to +125°C.
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
Rev 0; 5/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
or visit Maxim’s website at www.maxim-ic.com.
LCD Panels for TVs, Desktop Monitors, Notebook
and Tablet PCs
Automotive Telematics and Infotainment
Printers
f
134MHz
IN
________________________________________________________________ Maxim Integrated Products
________________________________________________________________ Maxim Integrated Products
= 16MHz TO
SMSEL1
SMSEL2
CLKIN
General Description
R
PU
16MHz to 134MHz Spread-Spectrum
V
CC
Applications
R
PU
Clock Modulator for LCD Panels
CLOCK RATE
DETECT
DS1083L
♦ Modulates a 16MHz to 134MHz Clock with Center
♦ Selectable Spread-Spectrum Modulation
♦ Low 75ps Cycle-to-Cycle Jitter
♦ Automatic Dither Cycle Rate Adjustment to
♦ Low Cost
♦ Low Power Consumption
♦ 3.3V Single Voltage Supply
♦ -40°C to +125°C Operating Temperature Range
♦ Small 6-Lead Thin SOT23 Package
+ Denotes a lead-free package.
T = Tape and reel.
DS1083LR+T
PLL WITH CENTER-
CONFIGURATION
Spread-Spectrum Dithering
Magnitudes of:
Maximize EMI Reduction
DECODE AND
CONTROL
DITHERING
±0.5%
±1%
±1.5%
±2%
PART
SPREAD
-40°C to +125°C
V
TEMP RANGE
Ordering Information
CC
SSO
f
134MHz (DITHERED)
VCC
GND
SSO
= 16MHz to
Block Diagram
PIN-PACKAGE
6 Thin SOT23
Features
1
1

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ds1083l Summary of contents

Page 1

... EMI in high-clock, frequency-based, digi- tal electronic equipment. Using an integrated phase-locked loop (PLL), the DS1083L accepts an input clock signal in the range of 16MHz to 134MHz and delivers a spread-spectrum modulated output clock signal. The PLL modulates, or dithers, the output clock about the center input frequen pin-selectable magnitude ...

Page 2

Spread-Spectrum Clock Modulator for LCD Panels ABSOLUTE MAXIMUM RATINGS Voltage Range on VCC Relative to GND.............-0.5V to +3.63V Voltage Range on Any Lead Relative to GND ................-0. 0.5V), not to exceed +3.63V CC Operating ...

Page 3

Spread-Spectrum (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE 12 CLKIN = 134MHz 10 CLKIN = 66MHz 8 CLKIN = 16MHz 3.0 3.1 3.2 3.3 3.4 3.5 SUPPLY VOLTAGE ...

Page 4

... SMSEL1 6 VCC Supply Voltage Detailed Description The DS1083L modulates an input clock to provide a cen- ter-dithered spread-spectrum output. A 16MHz to 134MHz clock is applied to the CLKIN pin. The PLL dithers the output clock about its center frequency at a user-selectable magnitude. The user is required to cycle power to the device each time there is a change in the input frequency, for the PLL to lock correctly ...

Page 5

... IF DITHER AMOUNT = SSO DITHER CYCLE RATE* TIME = 16MHz TO CLKIN VCC SMSEL1 DS1083L GND f SSO SMSEL2 SSO DITHERED For the latest package outline information www.maxim-ic.com/packages. PACKAGE TYPE 6 VCC 6 Thin SOT23 5 SMSEL1 4 SMSEL2 is a registered trademark of Maxim Integrated Products, Inc. ...

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