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| 型号： | FMS3820KRC |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, 8 BITS INPUT LOADING, 1700 us SETTLING TIME, 8-BIT DAC, PQFP48 |
| 封装： | LQFP-48 |
| 文件页数： | 1/13页 |
| 文件大小： | 62K |
| 代理商： | FMS3820KRC |
Pr
eliminar
y
Infor
mation
www.fairchildsemi.com
REV. 1.1.7 9/25/01
Features
± 2.5% gain matching
± 1 LSB linearity error
Internal bandgap voltage reference
Low glitch energy
Single 3.3 Volt power supply
Applications
PC Graphics
Video signal conversion
– RGB
– YCBCR
– Composite, Y, C
Description
FMS3818/3820 products are low-cost triple D/A converters,
tailored to t graphics and video applications where speed is
critical. Two speed grades are available:
CMOS-level inputs are converted to analog current outputs
that can drive 25–37.5
loads corresponding to doubly-termi-
nated 50–75
loads. A sync current following SYNC input
timing is added to the IOG output. BLANK will override
RGB inputs, setting IOG, IOB and IOR currents to zero when
BLANK = L. Although appropriate for many applications
the internal 1.25V reference voltage can be overridden by the
VREF input.
Few external components are required, just the current
reference resistor, current output load resistors, bypass
capacitors and decoupling capacitors.
Package is a 48-lead LQFP. Fabrication technology is
CMOS. Performance is guaranteed from 0 to 70°C.
FMS3818
180 Ms/s
FMS3820
200 Ms/s
Block Diagram
8 bit D/A
Converter
SYNC
8
SYNC
CLK
G7-0
COMP
+1.25V
Ref
IOG
IOS
BLANK
8 bit D/A
Converter
8
B7-0
IOB
8 bit D/A
Converter
8
R7-0
IOR
RREF
VREF
FMS3818/3820
Triple Video D/A Converters
3 x 8 bit, 200 Ms/s
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