参数资料
| 型号： | AD8384ASVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/24页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER LCD 6CH 10BIT 80-TQFP |
| 产品变化通告： | AD8384ASVZ Discontinuation 28/Feb/2012 |
| 标准包装： | 1 |
| 系列： | DecDriver™ |
| 显示器类型： | LCD |
| 接口： | 3 线串口 |
| 电流 - 电源： | 40mA |
| 电源电压： | 9 V ~ 18 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 80-TQFP 裸露焊盘 |
| 供应商设备封装： | 80-TQFP-EP（12x12） |
| 包装： | 托盘 |
AD8384
ACCURACY
To best correlate transfer function errors to image artifacts, the
Table 12. Bit Definitions
Bit
overall accuracy of the DecDriver is defined by two parameters:
VDE and VCME.
VDE, the differential error voltage, measures the difference
between the rms value of the output and the rms value of the
ideal. The defining expression is
Name
SD(0:7)
SD8
SD9
Bit Functionality
8-Bit SDAC Data. MSB = SD7.
Not Used.
Not Used.
– ? 1 –
? × VFS
VDE ( n ) =
[ VOUTN ( n ) – V 2 ] – [ VOUTP ( n ) – V 1 ] ?
2 ?
n ?
1023 ?
SD10
SD11
Output operating mode and SDAC selection control.
Output operating mode and SDAC selection control.
VCME, the common-mode error voltage, measures ? the dc
bias of the output. The defining expression is
Table 13. Truth Table
SD
1 ? VOUTN ( n ) + VOUTP ( n ) ( V 2 + V 1 ) ?
VCME ( n ) = ? – ?
2 ? 2 2 ?
TSTM CONTROL—TEST MODE
A LOW on this input allows serial interface control of the
output operating mode. A HIGH on this input forces the video
SEN
11
0
1
10
0
0
9
X
X
8
X
X
Action
Load VAO2. No change to VAO1. No
change to Grounded mode.
Load VAO1. Release outputs from
Grounded mode. No change to AO2.
outputs and VAO1 to normal operating mode.
Release Video Outputs and VAO1
GROUNDED OUTPUT MODE
In normal operating mode, the voltage of the video outputs and
VAO1 are determined by the inputs.
0
1
1
1
X
X
X
X
from Grounded Output mode. No
change to VAO1 and VAO2 data.
Video Outputs and VAO1 to
Grounded Output mode. No change
In Grounded Output mode, the video outputs and VAO1 are
to VAO1 and VAO2 data.
forced to AGND.
X
X
X
X
No Change.
OVERLOAD PROTECTION
The overload protection employs current limiters and a thermal
switch, protecting the video output pins against accidental
SERIAL DACS
Both serial DACs are loaded via the serial interface. The output
voltage is determined by the following equation:
shorts between any video output pin and AVCC or AGND.
VAO1 , V AO2 = SVRL + SD (0:7) × ( SVRH – SVRL )/256
The junction temperature trip point of the thermal switch is
165°C. Production test guarantees a minimum junction
temperature trip point of 125°C. Consequently, the operating
junction temperature should not be allowed to rise above 125°C.
For systems that operate at high internal ambient temperatures
and require large capacitive loads to be driven by the AD8384 at
high frequencies, a minimum airflow of 200 lfm should be
Output V AO1 is designed to drive very large capacitive loads
above 0.047 μF. Lower capacitive loads may result in excessive
overshoot at V AO1 .
LEVEL SHIFTERS
The characteristics of the level shifters are optimized based on
their intended use.
maintained to ensure junction temperatures below 125°C.
Seven level shifters—DX, CLX, CLXN, and ENBX(1:4)—are
3-WIRE SERIAL INTERFACE
The serial interface controls two 8-bit serial DACs, the overload
protection and the video output operating mode via a 12-bit
wide serial word from a microprocessor. Four of the 12-bits
select the function and the remaining eight bits are the data for
the serial DACs.
optimized for “X direction,” and three—DY, CLY, and CLYN—
are optimized for the “Y direction” control signals. One level
shifter, NRG, is designed to drive a large capacitive load and
optimized for an X direction control signal and two, DIRX and
DIRY are optimized for very low frequency control signals.
One level shifting edge detector, MONITI, MONITO, is
optimized to condition a synchronizing feedback reference
signal from the LCD.
Rev. 0 | Page 16 of 24
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相关代理商/技术参数 |
参数描述 |
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| AD8385 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 12-Channel Decimating LCD DECDRIVER with Level Shifters |
| AD8385ASVZ | 制造商:Analog Devices 功能描述: |
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