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參數(shù)資料
型號: AD9816JS
廠商: ANALOG DEVICES INC
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Complete 12-Bit 6 MSPS CCD/CIS Signal Processor
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP44
封裝: PLASTIC, MQFP-44
文件頁數(shù): 9/16頁
文件大小: 171K
代理商: AD9816JS
AD9816
–9–
REV. A
period, and equal to one ADCCLK period minus 30 ns. The
output data latency is three ADCCLK cycles.
The offset and gain values for the red, green and blue channels
are programmed using the serial interface. The order in which
the channels are switched through the multiplexer is selected by
programming the MUX register. The rising edge of CDSCLK2
always resets the multiplexer.
1-Channel CDS Mode
This mode operates in the same way as the 3-channel CDS
mode. The difference is that the multiplexer remains fixed in
this mode, so only the channel specified in the MUX register is
processed. Because the AD9816 is still sampling all three chan-
nels, the unused inputs should be grounded through 1200 pF
capacitors.
Timing for this mode is shown in Figure 3, using a 3
×
master
clock. Although it is not required, it is recommended that the
falling edge of CDSCLK2 be aligned with the rising edge of
ADCCLK.
1-Channel SHA Mode
This mode operates the same way as the 3-channel SHA mode,
except that the multiplexer remains stationary. Only the channel
specified in the MUX register is processed. Because the AD9816 is
still sampling all three channels, the unused inputs should be
grounded.
The input signal is sampled with respect to the voltage applied
to the OFFSET pin. With the OFFSET pin grounded, a zero
volt input corresponds to the ADC’s zero scale output. The
input clamp is disabled in this mode. However, the OFFSET
pin may be used as a coarse offset adjust pin. A voltage applied
to this pin will be subtracted from the voltages applied to the
red, green and blue inputs in the first amplifier stage of the
AD9816. For more information, see the Circuit Descriptions
section.
Timing for this mode is shown in Figure 4, using a 1
×
master
clock. CDSCLK1 should be grounded in this mode of opera-
tion. Although it is not required, it is recommended that the
falling edge of CDSCLK2 be aligned with the rising edge of
ADCCLK.
Table I. Register Map
A2
A1
A0
Register
Power-On Default Value
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Configuration Register
MUX Register
Red PGA Register
Green PGA Register
Blue PGA Register
Red Offset Register
Green Offset Register
Blue Offset Register
0 0 1 1 0 1 0 0 (LSB)
0 0 1 0 0 0 0 1 (LSB)
Undetermined
Undetermined
Undetermined
Undetermined
Undetermined
Undetermined
REGISTER OVERVIEW
The serial interface is used to program the eight internal regis-
ters of the AD9816. The address bits A2–A0 determine the
register in the AD9816 where serial data D7–D0 is written to or
read from.
The Configuration Register controls the operating mode of the
AD9816. Bits 7 (MSB), 6 and 0 are test mode bits and should
always be set to zero. Bit 5 is set high to enable the CDS mode.
Setting this bit low enables the SHA mode. Set Bit 4 high to
enable the 3 V input span. Set Bit 3 high to enable the 1.5 V
span. Bits 2 and 1 set the channel mode. Bit 2 enables 3-chan-
nel simultaneous sampling. Bit 1 enables single channel mode,
with the appropriate channel set in the MUX Register. At
power-on, this register defaults to 3-channel CDS mode with a
3 V input span, as shown in Table I.
7 6 5 4 3 2 1 0
TEST MODE (LSB)
1-CHANNEL MODE
3-CHANNEL MODE
1.5 V INPUT SPAN
3 V INPUT SPAN
CDS ENABLE
TEST MODE
TEST MODE (MSB)
Figure 7. Configuration Register
The MUX Register determines the order of channels that the
multiplexer will switch to in the different modes of operation.
Bit 7 and Bit 1 are test modes and should be set to zero. Bit 0 is
a test mode bit and should be set high. In 3-channel mode,
Table II shows how to set the order in which the channels are
converted. The multiplexer is always reset on the rising edge of
CDSCLK2. In 1-channel mode, the multiplexer is stationary,
and only converts the channel selected in Table III. At power-
on, this register defaults to 3-channel RGB mode.
7 6 5 4 3 2 1 0
TEST MODE (LSB)
TEST MODE
1-CHANNEL RED
1-CHANNEL GREEN
1-CHANNEL BLUE
3-CHANNEL BIT 0
3-CHANNEL BIT 1
TEST MODE (MSB)
Figure 8. MUX Register
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9816JS-80010 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete 12-Bit 6 MSPS CCD/CIS Signal Processor
AD9816JSRL 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Analog Devices 功能描述:
AD9821 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete 12-Bit 40 MSPS Imaging Signal Processor
AD9821KST 制造商:Analog Devices 功能描述:AFE Video 1ADC 12-Bit 3.3V 48-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:12 BIT 40 MSPS IMAGING SIGNAL PROCESSOR - Bulk
AD9821KSTRL 制造商:Analog Devices 功能描述:AFE Video 1ADC 12-Bit 3.3V 48-Pin LQFP T/R 制造商:Rochester Electronics LLC 功能描述:12 BIT 40 MSPS IMAGING SIGNAL PROCESSOR - Tape and Reel
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