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| FMS9884A Datasheet, PDF (1/29 Pages) Fairchild Semiconductor – 3x8-Bit, 108/140/175 Ms/s Triple Video A/D Converter with Clamps | |||
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www.fairchildsemi.com
FMS9884A
Graphics Digitizer
3x8-Bit, 108/140/175 Ms/s Triple Video A/D Converter with Clamps
Features
⢠3-channels
⢠100/140/175 Ms/s conversion rate
⢠Programmable Clamps
⢠Adjustable Gain and offset
⢠Internal Reference Voltage
⢠I2C/SMBus compatible Serial Port
⢠Pin Compatible with AD9884A
Applications
⢠Flat panel displays and projectors
⢠RGB Graphics Processing
Description
As a fully integrated analog interface, the FMS9884A can digi-
tize RGB graphics with resolutions up to 1600 x 1200/65Hz
refresh or 1600 x 1200/85Hz using alternate pixel sampling.
ADC sampling clock can be derived from either an external
source or incoming horizontal sync signal using the internal
PLL. Output data is released through either one port at full
rate or both ports, each running at half-rate. Setup and control
Block Diagram
is via registers, accessible through an SMBus/I2C compatible
serial port.
Input amplitude range is 500â1000mV with either DC or AC
coupling. Lower reference of AC coupled inputs is estab-
lished with input clamps that are either internally generated
or externally provided.
Common to the three channels are clamp pulses, a bandgap
reference voltage and clocks derived from a PLL or an external
source. Digital data levels are 2.5â3.3 volt CMOS compliant.
Power can be derived from a single +3.3 Volt power supply. For
175 MHz applications see special VPLL requirements. Package
is a 128-lead MQFP. Performance speciï¬cations are guaran-
teed over 0°C to 70°C range.
Product Number
FMS9884AKAC100
FMS9884AKAC140
FMS9884AKAC175
Speed
108 Ms/s
140 Ms/s
175 Ms/s
RIN
Clamp
GIN
Clamp
BIN
Clamp
Gain &
Offset
Gain &
Offset
Gain &
Offset
A/D
RPD7-0
Converter
Switch
A/D
GPD7-0
Converter
Switch
A/D
BPD7-0
Converter
Switch
VREFIN
CLAMP
INVSCK
XCK
HSIN
COAST
LPF
SDA
SCL
A0
A1
PWRDN
SCK
Reference
Timing
HS
Generator
PLL
PXCK
ICLAMP
DCK
DCK
HSOUT
Control
ACSIN
SYNC
STRIPPER
DCSOUT
DRA7-0
DRB7-0
DGA7-0
DGB7-0
DBA7-0
DBB7-0
VREFOUT
REV. 1.2.2 12/7/01
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