- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375248 > AD9561 (Analog Devices, Inc.) Pulse Width Modulator(高速,數(shù)字可調(diào)的PWM) PDF資料下載
參數(shù)資料
| 型號(hào)： | AD9561 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Pulse Width Modulator(高速,數(shù)字可調(diào)的PWM) |
| 中文描述： | 脈寬調(diào)制器（高速，數(shù)字可調(diào)的脈寬調(diào)制） |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 266K |
| 代理商： | AD9561 |
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD9561
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
Analog Devices, Inc., 1996
Pulse Width Modulator
FUNCTIONAL BLOCK DIAGRAM
RAMP
RAMP
CLOCK
R
SET
CAL IN
8-BIT
DATA
SEM/DEM
LEM/TEM
RETRACE
REF
DAC
OUTPUT
LOGIC
PWM
OUT
CAL
DAC
INTERNAL
TIMING
L
A
T
C
H
L
A
T
C
H
AD9561
CAL
OUT
CAL
OUT
FEATURES
60 MHz Pulse Rate
8-Bit Resolution
Center, Left or Right Justify
Low Power: 700 mW typical
Minimum Pulse Width: <5 ns
Maximum PW: 100 % Full-scale
APPLICATIONS
Laser Printers
Digital Copiers
Color Copiers
GENERAL DESCRIPTION
The AD9561 is a second generation high speed, digitally
programmable pulse width modulator (PWM). Output pulse
width is proportional to an 8-bit DATA input value. Two
additional control inputs determine if the pulse is placed at the
beginning, middle or end of the clock period. Pulse width and
placement can be changed every clock cycle up to 60 MHz.
Pulse width modulation is a well proven method for controlling
gray scale and resolution enhancement in scanning laser print
engines. Modulating pulse width provides the most cost
effective method for continuous tone reproduction and resolu-
tion enhancement in low-to-moderate cost scanning electro-
photographic systems.
The AD9561 uses precision analog circuits to control dot size
so that near-photographic quality images are practical without
the high frequency clock signals required by all digital approaches.
The AD9561 has improved features and performance over its
predecessor, the AD9560. An improved ramp topology enables
control of pulse width through 100% of the dot clock period as
opposed to 95% for the AD9560. This enables smooth transi-
tion across dot boundaries for line screen applications.
Additionally, input data setup and hold time are symmetrical at
2 ns each, simplifying interface to the system bus.
Finally, chip design and pinout are optimized to decrease
sensitivity of analog circuits to digital coupling. (See layout
section for detailed recommendations for optimum results.)
Inputs are TTL or CMOS compatible, and outputs are CMOS
compatible. The AD9561JR is packaged in a 28-lead plastic
SOIC. It is rated over the commercial temperature range, 0
°
C
to +70
°
C.
HIGHLIGHTS
1. 60 MHz native printer clock rate.
2. Single +5 V power supply.
3. On-chip Autocalibration.
4. Pulse placement flexibility.
5. High resolution: 256 pulse widths.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9562 | Dual PWM(雙PWM) |
| AD9661AKR-REEL | Laser Diode Driver with Light Power Control |
| AD9661AKR | Laser Diode Driver with Light Power Control |
| AD9662 | 3-Channel Laser Diode Driver with Oscillator |
| AD9701 | 250 MSPS Video Digital-to-Analog Converter(250MSPS視頻D/A轉(zhuǎn)換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9561JR | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| AD9561JR-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Pulse Width Modulator |
| AD9562JP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD9562JP-REEL | 制造商:Analog Devices 功能描述: |
| AD9571 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ethernet Clock Generator, 10 Clock Outputs |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。