IR3Y48M View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'IR3Y48M' PDF : 31 Pages View PDF
IR3Y48M
Analog Specifications
(Unless otherwise specified, AVDD = DVDD = 3.0 V, TA = +25 ˚C, signal frequency fIN = 1 MHz,
signal level = –1 dB (full scale))
The current direction flowing into the pin is positive direction.
CDS & CLAMP CIRCUITS
(Sampling frequency fS = 20 MHz)
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNIT NOTE
Analog input range
VICDS
VIAI
Normally
At ADIN
1.1
Vp-p
1
1.1
Vp-p
Input referred noise
Input capacitance
Input Bandwidth
NI
CIN
CBW
At gain = max.
At fs = 20 MHz
At gain = min.
CCDIN, ADIN & REFIN
100
µVrms
2
400
µVrms
15
pF
1 pixel 3
Clamp voltage
VCLPCAP
Normally
At ADIN
1.65 1.8 1.95 V
1.15 1.3 1.45 V
Black calibration period
tBKCAL
2000 pixel 4, 5
NOTES :
1. Normally : Signal path through CDS/AGC/ADC
In this case analog input range is downward
from clamp voltage.
ADIN : Signal bypassing CDS (Direct AGC or ADC
input)
In this case analog input range is upward
from clamp voltage.
2. Specified at MONOUT pin. The noise bandwidth is 100
kHz to 5 MHz.
3. Bandwidth from CCDIN/REFIN to ADC. The bandwidth
is specified as the settling time of ADC output for step
input (full scale – 1 dB) response (at gain = min.).
4. Black calibration period is the period of stabilization of
output code within ±1 LSB (average) compared to register
value for the black level code of 0 to 50% of the full scale
input. (Assuming external capacitance = 0.033 µF.)
External capacitor value to OBCAP pin determines the
bandwidth of the black level cancel loop. Since the gain
of the loop depends on sampling frequency, the
maximum frequency (settling within certain pixels) and
the minimum frequency (avoiding oscillation of the circuit)
are defined.
5. Select the external capacitor referring the following list
based on the minimum and maximum operating
frequencies.
If the black level settling specification (within 2 000
pixels) could be ignored, the maximum sampling
frequency for 0.1 µF and 0.33 µF will extend according
to the increment.
PARAMETER MODE OBCAP MIN. MAX. UNIT
Available
20 MHz
0.033 µF 7.6 20 MHz
mode
sampling
frequency
0.033 µF 5.8
15 MHz
0.1 µF 2.2
mode
0.33 µF 0.6
15 MHz
5.7 MHz
1.7 MHz
23
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