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DS1081L の電気的特性と機能

DS1081LのメーカーはMaxim Integrated Productsです、この部品の機能は「Spread-Spectrum Clock Modulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 DS1081L
部品説明 Spread-Spectrum Clock Modulator
メーカ Maxim Integrated Products
ロゴ Maxim Integrated Products ロゴ 




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DS1081L Datasheet, DS1081L PDF,ピン配置, 機能
Rev 0; 4/07
20MHz to 134MHz Spread-Spectrum
Clock Modulator for LCD Panels
General Description
The DS1081L is a spread-spectrum clock modulator IC
that reduces EMI in high clock-frequency-based, digital
electronic equipment.
Using an integrated phase-locked loop (PLL), the
DS1081L accepts an input clock signal in the range of
20MHz to 134MHz and delivers a spread-spectrum mod-
ulated output clock signal. The PLL modulates, or dithers,
the output clock about the center input frequency at a
pin-selectable magnitude and dither rate, allowing direct
EMI control and optimization. In addition, through an
enable pin the dithering can be enabled or disabled for
easy comparison of system performance during EMI test-
ing. This same input pin also allows the DS1081L output
to be tri-stated.
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.
Thewww.DataSheet4U.com DS1081L is provided in an 8-pin TSSOP package
and operates over a full automotive temperature range
of -40°C to +125°C.
Applications
LCD Panels for TVs, Desktop Monitors, and
Notebook and Tablet PCs
Automotive Telematics and Infotainment
Printers
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
Block Diagram
Features
Modulates a 20MHz to 134MHz Clock with Center
Spread-Spectrum Dithering
Selectable Spread-Spectrum Modulation
Magnitudes of:
±0.5%
±1.0%
±1.5%
±2.0%
Low 75ps Cycle-to-Cycle Jitter
Spread-Spectrum Disable Mode
Pin Compatible with Alliance/PulseCore
Semiconductor P2040 Series Devices
Clock Output Disable
Low Cost
Low Power Consumption
3.3V Single Voltage Supply
-40°C to +125°C Temperature Range
Small 8-Pin TSSOP Package
Ordering Information
PART
TEMP RANGE
DS1081LE+
-40°C to +125°C
DS1081LE+T
-40°C to +125°C
+Denotes lead-free package.
T Denotes tape-and-reel.
PIN-PACKAGE
8 TSSOP
8 TSSOP
Pin Configuration
CLKIN
fIN = 20MHz TO
134MHz
CRSEL
SMSEL1
SMSEL2
DS1081L
PLL WITH CENTER-
DITHERED
SPREAD
SPECTRUM
VCC
VCC
SSO
fSSO = 20MHz to
134MHz (DITHERED)
CONFIGURATION
DECODE AND
CONTROL
ENABLE
LOGIC
SSEN
GND
TOP VIEW
CLKIN 1
SMSEL1 2
SMSEL2 3
GND 4
DS1081L
8 VCC
7 CRSEL
6 SSO
5 SSEN
TSSOP
(4.40mm)
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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DS1081L pdf, ピン配列
20MHz to 134MHz Spread-Spectrum
Clock Modulator for LCD Panels
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
SUPPLY CURRENT vs. SUPPLY VOLTAGE
14
12 CLKIN = 134MHz
10 CLKIN = 66MHz
8
6 CLKIN = 20MHz
4
2
0
3.0 3.1 3.2 3.3 3.4 3.5 3.6
SUPPLY VOLTAGE (V)
DUTY CYCLE vs. TEMPERATURE
60
CLKIN = 66MHz
58
56
54
52
50
48
46
44
42
40
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
SUPPLY CURRENT vs. TEMPERATURE
14
12 CLKIN = 134MHz
10 CLKIN = 66MHz
8
CLKIN = 33MHz
6
4
2
0
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
DUTY CYCLE vs. SUPPLY VOLTAGE
60
CLKIN = 66MHz
58
56
54
52
50
48
46
44
42
40
3.0
3.1 3.2 3.3 3.4 3.5
SUPPLY VOLTAGE (V)
3.6
SUPPLY CURRENT vs. FREQUENCY
14
12
10 VCC = 3.6V
8
6 VCC = 3.0V
4
2
0
20 36 56 76 96 116 134
FREQUENCY (MHz)
SPECTRUM ATTENUATION vs. FREQUENCY
AT DIFFERENT DITHER AMPLITUDES
±1% 0.5% fOUT = 40MHz
±1.5%
±2%
3dB
6dB
4.5dB
fOUT = 40MHz
RBW = 120KHz
CENTER DITHER
FREQUENCY (MHz)
_____________________________________________________________________ 3


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共有リンク

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部品番号部品説明メーカ
DS1081L

Spread-Spectrum Clock Modulator

Maxim Integrated Products
Maxim Integrated Products


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