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參數(shù)資料
| 型號： | AD9844A |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Complete 12-Bit 20 MSPS CCD Signal Processor |
| 中文描述： | 完整的12位20 MSPS的CCD信號處理器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 169K |
| 代理商： | AD9844A |
–3–
REV. 0
AD9844A
Parameter
Min
Typ
Max
Unit
Notes
P
OWER CONSUMPTION
78
mW
See TPC 1 for Power Curves
MAXIMUM CLOCK RATE
20
MHz
CDS
Allowable CCD Reset Transient
1
Max CCD Black Pixel Amplitude
1
Max Input Range Before Saturation
1
Max Input Range Before Saturation
Max Input Range Before Saturation
Max Output Range
Gain Resolution
Gain Range (Two’s Complement Coding)
Min Gain (CDS Gain Register Code 32)
Medium Gain (CDS Gain Code 63)
Max Gain (CDS Gain Code 31)
500
200
mV
mV
V p-p
V p-p
V p-p
V p-p
Steps
See Input Waveform in Note 1
1.0
With 4 dB CDS Gain
With –2 dB CDS Gain
With 10 dB CDS Gain
At Any CDS Gain Setting
1.5
0.5
1.6
64
See Figure 12 for CDS Gain Curve
–2
4
10
dB
dB
dB
4 dB Is Default with CDS Gain Disabled
VARIABLE GAIN AMPLIFIER (VGA)
Max Input Range
Max Output Range
Gain Control Resolution
Gain Monotonicity
Gain Range
Low Gain (VGA Register Code 91)
Max Gain (VGA Code 1023)
1.6
2.0
V p-p
V p-p
Steps
1024
Guaranteed
See Figure 13 for VGA
Gain Curve
See Figure 13 for Gain Equations
2
36
dB
dB
BLACK LEVEL CLAMP
Clamp Level Resolution
Clamp Level
Min Clamp Level
Max Clamp Level
256
Steps
Measured at ADC Output
0
255
LSB
LSB
SYSTEM PERFORMANCE
Gain Accuracy, VGA Code 91 to 1023
Peak Nonlinearity, 500 mV Input Signal
Peak Nonlinearity, 800 mV Input Signal
Total Output Noise
Power Supply Rejection (PSR)
Specifications Include Entire Signal Chain
Use Equations on Page 13 to Calculate Gain
12 dB Gain Applied (4 dB CDS Gain)
8 dB Gain Applied (4 dB CDS Gain)
AC Grounded Input, 6 dB Gain Applied
Measured with Step Change on Supply
–0.5
+0.5
dB
%
%
LSB rms
dB
0.1
0.4
0.6
40
POWER-UP RECOVERY TIME
From Fast Recovery Mode
From Reference Standby Mode
From Total Shutdown Mode
From Power-Off Condition
Clocks Must Be Applied, as in Figures 5 and 6
0.1
1
3
15
ms
ms
ms
ms
NOTES
1
Input Signal Characteristics defined as follows, with 4 dB CDS gain:
1V MAX
INPUT
SIGNAL RANGE
200mV MAX
OPTICAL
BLACK PIXEL
500mV TYP
RESET
TRANSIENT
Specifications subject to change without notice.
CCD-MODE SPECIFICATIONS
(T
MIN
to T
MAX
, AVDD = DVDD = 3.0 V, f
DATACLK
= f
SHP
= f
SHD
= 20 MHz, unless otherwise noted.)
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