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参数资料
| 型号： | SPT1019AIN |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, 8 BITS INPUT LOADING, 0.0055 us SETTLING TIME, 8-BIT DAC, PDIP24 |
| 封装： | PLASTIC, DIP-24 |
| 文件页数： | 11/12页 |
| 文件大小： | 118K |
| 代理商： | SPT1019AIN |
SPT
8
5/14/97
SPT1019
nated 50 or 75 ohm load to standard video levels. In the
standard configuration of figure 5, the output voltage is the
product of the output current and load impedance and is
between 0 and -1.07 V. The Out- output (figure 9) will provide
a video output waveform with the Sync pulse bottom at the
-1.07 V level. The Out+ is inverted with Sync up.
Figure 4 - CONVert, CONVert Switching Levels
V
IDF
V
ICM MAX
0.0 V
-1.3 V
CONV
V
ICM MIN
Figure 5A - Standard Load
OUT +
Video Monitor
Inverse
Video
OUT-
RL
75
75
COAX
RS
75
RL
75
75
COAX
RS
75
SPT1019
Figure 5B - Test Load
Video Out
0 to -1 Volt
OUT +
OUT -
RL
37.5
CL
<5 pF
TYPICAL RGB GRAPHICS SYSTEM
In an RGB graphics system, the color displayed is determined
by the combined intensities of the red, green and blue (RGB)
D/A converter outputs. A change in gain or offset in any of the
RGB outputs will affect the apparent hue displayed on the
CRT screen.
Thus, it is very important that the outputs of the D/A convert-
ers track each other over a wide range of operating condi-
tions. Since the D/A output is proportional to the product of the
reference and digital input code, a common reference should
be used to drive all three D/As in an RGB system to minimize
RGB DAC-to-DAC mismatch and improve TC tracking.
The SPT1019 contains an internal precision bandgap refer-
ence which completely eliminates the need for an external
reference. The reference can supply up to 50
A to an
external load, such as two other DAC reference inputs.
The circuits shown in figure 6 illustrate how a single SPT1019
may be used as a master reference in a system with multiple
DACs (such as RGB). The other DACs are simply slaved from
the SPT1019’s reference output. The SPT1018s shown are
especially well-suited to be slaved to a SPT1019 for a better
TC tracking from DAC-to-DAC, since they are essentially
SPT1019s without the reference. The SPT1018 is pin-com-
patible with the TDC1018, that does not have an internal
reference. Although either the TDC1018 or the SPT1018 may
be slaved from an SPT1019, the higher performance
SPT1018 and the above mentioned DAC-to-DAC TC track-
ing is the best choice for new designs.
No external reference is required for operation of the
SPT1019, as this function is provided internally. The internal
reference is a bandgap type and is suitable for operation over
extended temperature ranges. The SPT1018 must use an
external reference.
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相关代理商/技术参数 |
参数描述 |
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| SPT1019BIN | 制造商:CADEKA 制造商全称:CADEKA 功能描述:8-BIT, HIGH SPEED D/A CONVERTER |
| SPT104 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DC TO 1.1GHz LINEAR AMPLIFIER |
| SPT-105 | 功能描述:烙铁 THERMOCOUPLE ASSEMB SP-100T/200T RoHS:否 制造商:Weller 产品:Soldering Stations 类型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大温度:+ 850 F 电缆类型:US Cord Included |
| SPT-106 | 功能描述:烙铁 CONTROL ASSEMBLY SP-100T RoHS:否 制造商:Weller 产品:Soldering Stations 类型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大温度:+ 850 F 电缆类型:US Cord Included |
| SPT-108 | 制造商:Tamura Corporation of America 功能描述: |
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