AD9945 Analog Devices, AD9945 Datasheet - Page 3

• Manufacturer Part Number: AD9945
• Description: Complete 12-Bit 40 MHz CCD Signal Processor
• Manufacturer: Analog Devices

SYSTEM SPECIFICATIONS
Parameter
CDS
VARIABLE GAIN AMPLIFIER (VGA)
BLACK LEVEL CLAMP
A/D CONVERTER
VOLTAGE REFERENCE
SYSTEM PERFORMANCE
*Input Signal Characteristics defined as follows:
RESET TRANSIENT
Specifications subject to change without notice.
REV. A
Maximum Input Range before Saturation*
Allowable CCD Reset Transient*
Maximum CCD Black Pixel Amplitude*
Gain Control Resolution
Gain Monotonicity
Gain Range
Clamp Level Resolution
Clamp Level
Resolution
Differential Nonlinearity (DNL)
No Missing Codes
Data Output Coding
Full-Scale Input Voltage
Reference Top Voltage (REFT)
Reference Bottom Voltage (REFB)
Gain Range
Gain Accuracy
Peak Nonlinearity, 500 mV Input Signal
Total Output Noise
Power Supply Rejection (PSR)
500mV TYP
Minimum Gain
Maximum Gain
Minimum Clamp Level
Maximum Clamp Level
Low Gain (VGA Code = 0)
Maximum Gain (VGA Code = 1023)
OPTICAL BLACK PIXEL
100mV TYP
INPUT SIGNAL RANGE
1V TYP
(T
MIN
to T
Min
40.0
12
40.0
MAX
Straight Binary
, AVDD = DVDD = DRVDD = 3.0 V, f
Guaranteed
Guaranteed
± 0.5
Typ
1.0
500
100
5.3
41.5
256
0
255
2.0
2.0
1.0
5.3
41.5
0.1
1.2
40
1024
1.0
Max
–3–
Unit
Vp-p
mV
mV
Steps
dB
dB
Steps
LSB
LSB
Bits
LSB
V
V
V
dB
dB
dB
%
LSB rms
dB
SAMP
Notes
See Input Waveform in Footnote
See Figure 7 for VGA Gain Curve
See Variable Gain Amplifier Section for
VGA Gain Equation
Measured at ADC Output
Specifications Include Entire Signal Chain
12 dB Gain Applied
AC Grounded Input, 6 dB Gain Applied
= 40 MHz, unless otherwise noted.)
AD9945