Datasheet

AD9974
Rev. A | Page 6 of 52
ANALOG SPECIFICATIONS
X = A = B, AVDD_X = 1.8 V, f
CLI
= 65 MHz, typical timing specifications, T
MIN
to T
MAX
, unless otherwise noted.
Table 5.
Parameter Min Typ Max Unit Test Conditions/Comments
CDS
1
Allowable CCD Reset Transient 0.5 0.8 V
CDS Gain Accuracy
−3 dB CDS Gain −3.3 −2.8 −2.3
0 dB CDS Gain (Default) −0.7 −0.2 +0.3
3 dB CDS Gain 2.3 2.8 3.3
6 dB CDS Gain 4.9 5.4 5.9
Maximum Input Voltage VGA gain = 5.6 dB (Code 15, default value)
−3 dB CDS Gain 1.4 V p-p
0 dB CDS Gain (Default) 1.0 V p-p
3 dB CDS Gain 0.7 V p-p
6 dB CDS Gain 0.5 V p-p
Allowable OB Pixel Amplitude
0 dB CDS Gain (Default) −100 +200 mV
6 dB CDS Gain −50 +100 mV
VARIABLE GAIN AMPLIFIER (VGA_X)
Gain Control Resolution 1024 Steps
Gain Monotonicity Guaranteed
Low Gain Setting (VGA Code 15, Default) 6 dB
Maximum Gain Setting (VGA Code 1023) 42 dB
BLACK LEVEL CLAMP
Clamp Level Resolution 1024 Steps
Minimum Clamp Level (Code 0) 0 LSB Measured at ADC output
Maximum Clamp Level (Code 1023) 1023 LSB Measured at ADC output
ADC (CHN_A and CHN_B)
Resolution 14 Bits
Differential Nonlinearity (DNL) −1.0 ±0.5 +1.2 LSB
No Missing Codes Guaranteed
Integral Nonlinearity (INL) 5 15 LSB
Full-Scale Input Voltage 2.0 V
VOLTAGE REFERENCE
Reference Top Voltage (REFT_X) 1.4 V
Reference Bottom Voltage (REFB_X) 0.4 V
SYSTEM PERFORMANCE Specifications include entire signal chain
VGA Gain Accuracy 0 dB CDS gain (default)
Low Gain (Code 15) 5.1 5.6 6.1 dB Gain = (0.0359 × code) + 5.1 dB
Maximum Gain (Code 1023) 41.3 41.8 42.3 dB
Peak Nonlinearity, 500 mV Input Signal 0.1 0.4 % 12 dB total gain applied
Total Output Noise 2 LSB rms AC-grounded input, 6 dB gain applied
Power Supply Rejection (PSR) 48 dB Measured with step change on supply
1
Input signal characteristics are defined as shown in . Figure 2