XRD98L56 Datasheet, PDF (5/35 Pages) Exar Corporation – CCD Image Digitizers with CDS, PGA and 10-Bit A/D

XRD9855/9856
XRD98L55/98L56
DC ELECTRICAL CHARACTERISTICS – XRD9855 and XRD9856
U n less otherw ise specified: D V _DD = V_DD = 5.0V, Pixel Rate = 18MSPS, V_RT = 3.8V, V_RB = 0.5V
Symbol Parameter
Min.
CDS Performance
CDSV_IN
BW
Input Range
Small Signal Bandwidth (-3dB)
SR
Slew Rate
FT
Feed–through (Hold Mode)
PGA Parameters
AV_MIN
AV_MAX
PGA n
Minimum Gain
Maximum Gain
Resolution
3.5
35.5
Typ. Max. Unit
200 800 mV_PP
60
MHz
40
V/µs
-60
dB
5 6.5 dB
37 38.5 dB
8
bits
GE
Gain Error
5
% FS
ADC Parameters (Measured Through TESTVIN)
ADC n Resolution
10
f_s
Max Sample Rate
27
DNL
Differential Non-Linearity
-1
+0.75
bits
MSPS
1.2 LSB
DNL27 Differential Non-Linearity
-1 +1.3 2.0 LSB
EZS
Zero Scale Error
EFS
Full Scale Error
V_IN
DC Input Range
-50
GND
50 mV
4 % FS
V_DD V
V_RT
V_RB
∆V_REF
R_L
Top Reference Voltage
1.5
Bottom Reference Voltage
0.3
Differential Reference Voltage 1.0
Ladder Resistance
280
3.8 V_DD V
0.5 V_DD-1 V
3.3 V_DD V
400 520 Ohms
Conditions
Pixel (Black Level - Video Level)
400mV Step Input
Transfer function is linear steps in dB
(1LSB = 0.125dB)
At maximum or minimum gain
setting
Up to 18MHz sample rate
(XRD9855)
Up to 27MHz sample rate
(XRD9856)
Measured relative to V_RB
V_IN of the ADC can swing from GND
to V_DD. Input range is limited by
the output swing of the PGA
V_RT >V_RB
V_RT >V_RB
V_RB
( ) ^{Self Bias VRB VRB = VDD}
0.4 0.5 0.6
V
V_RB connected to V_RBO
10
V_RT
( ) ^{Self Bias VRT VRT = VDD}
3.5 3.8 4.1
V
V_RT connected to V_RTO
1.30
Rev. 1.01
5