Datasheet

AD9943/AD9944
Rev. B | Page 4 of 20
AD9943 SYSTEM SPECIFICATIONS
T
MIN
to T
MAX
, AVDD = DVDD = DRVDD = 3 V, f
SAMP
= 25 MHz, unless otherwise noted.
Table 3.
Parameter Min Typ Max Unit Conditions
CDS
Maximum Input Range before Saturation
1
1.0 V p-p
Allowable CCD Reset Transient
1
500 mV See input waveform in footnote.
Maximum CCD Black Pixel Amplitude
1
100 mV
VARIABLE GAIN AMPLIFIER (VGA)
Gain Control Resolution 1024 Steps
Gain Monotonicity Guaranteed
Gain Range
Minimum Gain 5.3 dB See Figure 13 for VGA gain curve.
Maximum Gain 40 41.5 dB
See Variable Gain Amplifier section for VGA
gain equation.
BLACK LEVEL CLAMP
Clamp Level Resolution 256 Steps
Clamp Level Measured at ADC output.
Minimum Clamp Level 0 LSB
Maximum Clamp Level 63.75 LSB
A/D CONVERTER
Resolution 10 Bits
Differential Nonlinearity (DNL) ±0.3 LSB
No Missing Codes Guaranteed
Data Output Coding Straight binary
Full-Scale Input Voltage 2.0 V
VOLTAGE REFERENCE
Reference Top Voltage (REFT) 2.0 V
Reference Bottom Voltage (REFB) 1.0 V
SYSTEM PERFORMANCE Specifications include entire signal chain.
Gain Range
Low Gain (VGA Code = 0) 5.3 dB
Maximum Gain (VGA Code = 1023) 40 41.5 dB
Gain Accuracy ±1 dB
Peak Nonlinearity 500 mV Input Signal 0.1 % 12 dB gain applied.
Total Output Noise 0.3 LSB rms AC grounded input, 6 dB gain applied.
Power Supply Rejection (PSR) 50 dB Measured with step change on supply.
1
Input signal characteristics defined as follows:
100mV TYP
OPTICAL BLACK PIXEL
500mV TYP
RESET TRANSIENT
1V TYP
INPUT SIGNAL RANGE
02905-B-002