MODULE
Data processing unit for NMOS linear image sensor
C8799
Data processing unit with USB interface
C8799 is a data processing unit that converts video signals from an NMOS image sensor driver circuit into digital signals and transfers them to a PC.
The USB interface allows easy connection to a PC for high-speed data communications at 12 Mbps.
Features Applications
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Built-in 12-bit A/D converter
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Adjustable data rate (5 MHz Max.)
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Internal memory: 1 mega-word
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Interface of computer: USB 1.1
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Simultaneous measurements using multiple units
Spectrophotometry
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Position measurement
■ Absolute maximum ratings (Ta=25 °C)
Parameter Symbol Value Unit
Digital power supply V
Analog power supply V
Operating temperature Topr 0 to +50 *
Storage temperature Ts tg 0 to +60 *
*1: No condensation
D
A
+7 V
±18 V
1
1
°C
°C
■ Specifications
Parameter Remark Specification
+5 V *
+15 V *
-15 V -15 V, 0 mA (for image sensor driver circuit supply)
Video input signal *
Control output signal (START) *
Synchronized output signal (CLK) *
A/D resolution 12 bit
Data rate *
Internal memory 1 mega-word
Interface of computer USB 1.1
Compatible OS *
*2: Tentative data
*3: C8799-01 compatible with 0 to 5 V supply is also available.
*4: Pulse width and interval are adjustable.
*5: Setting is selectable.
*6: Data rate equals the CLK frequency divided by the number of CLK pulses generated in an NMOS driver circuit for forming pixels.
*7: Correct operation on OS (operating system) has been verified, but please note that operation has not been verified on all PC
models.
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16 MHz, 8 MHz, 4 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125 kHz, 62.5 kHz
Windows 98, Windows 2000, Windows XP
+5 V, 200 mA
+15 V, 150 mASupply voltage
0 to 10 V
Positive logic
5 MHz (Max.)
1
Data processing unit for NMOS linear image sensor
■ Block diagram
Connector for multichannel detector head: D-sub 15 pin socket
CLK
START
TRIGGER
EOS
VIDEO
OSC. TRIG
EXT. TRIG
MONITOR
+5 V
+15 V
-15 V
+5 V
TIME BASE
CONTROLLER
CS
CPU
RD
WR
MPX
SEL
USB
DOS/V COMPUTER
C8799
+5 V
PGA
+5 V
+15 V
-15 V
CONNECTOR FOR POWER SUPPLY: HR10A-10R-10S
OFFSET
PGA GAIN SETTING
+5 V
DATA PROCESSING UNIT C8799
■ Timing chart (external trigger setting)
EXT. TRIG
M-IN-START *
T2
When EXT. TRIG is input while GATE is at High level,
data is enabled from the next scan.
START
GATE *
D ATA
Data collection timing by external one-shot trigger
(when enabled with falling edge)
12 BIT ADC
5 MHz SAMPLING
T2 T2
EFFECTIVE DATA
MEMORY
1 MEGA-WORD
D0 to D11
KACCC0173EA
EXT. TRIG
TX
The M-IN-START setting (T2) is ignored when this mode is selected.
But T1 stays enabled. Integration time depends on TX.
M-IN-START *
T1
START
D ATA
EFFECTIVE DATA
DATA COLLECTION START KEY INPUT
Data collection timing by external continuous trigger input
(when enabled with falling edge)
KACCC0176EA
* Internal signal
2