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REV. A
–5–
AD9848/AD9849
AD9849–ANALOG SPECIFICATIONS (T
MIN to TMAX, AVDD = DVDD = 3.0 V, fCLI = 30 MHz, unless otherwise noted.)
Parameter
Min
Typ
Max
Unit
Notes
CDS
Gain
0
dB
Allowable CCD Reset Transient
*
500
mV
See Input Waveform in Note
Max Input Range Before Saturation
*
1.0
V p-p
Max CCD Black Pixel Amplitude
*
150
mV
PIXEL GAIN AMPLIFIER (PxGA)
Max Input Range
1.0
V p-p
Max Output Range
1.6
V p-p
Gain Control Resolution
64
Steps
Gain Monotonicity
Guaranteed
Gain Range
Min Gain (32)
–2
dB
Med Gain (0)
4
dB
Medium Gain (4 dB) Is Default Setting
Max Gain (31)
10
dB
VARIABLE GAIN AMPLIFIER (VGA)
Max Input Range
1.6
V p-p
Max Output Range
2.0
V p-p
Gain Control Resolution
1024
Steps
Gain Monotonicity
Guaranteed
Gain Range
Low Gain (91)
2
dB
Max Gain (1023)
36
dB
BLACK LEVEL CLAMP
Clamp Level Resolution
256
Steps
Clamp Level
Measured at ADC Output
Min Clamp Level (0)
0
LSB
Max Clamp Level (255)
255
LSB
A/D CONVERTER
Resolution
12
Bits
Differential Nonlinearity (DNL)
±0.5
±1.0
LSB
No Missing Codes
Guaranteed
Full-Scale Input Voltage
2.0
V
VOLTAGE REFERENCE
Reference Top Voltage (VRT)
2.0
V
Reference Bottom Voltage (VRB)
1.0
V
SYSTEM PERFORMANCE
Gain Accuracy
Specifications Include Entire Signal Chain
Gain Includes 4 dB Default PxGA Gain
Low Gain (91)
5
6
7
dB
Max Gain (1023)
38
39.5
41
dB
Peak Nonlinearity, 500 mV Input Signal
0.2
%
12 dB Gain Applied
Total Output Noise
0.6
LSB rms AC Grounded Input, 6 dB Gain Applied
Power Supply Rejection (PSR)
40
dB
Measured with Step Change on Supply
*Input signal characteristics defined as follows:
500mV TYP
RESET
TRANSIENT
150mV MAX
OPTICAL
BLACK PIXEL
1V MAX
INPUT
SIGNAL RANGE
Specifications subject to change without notice.