AD9822JRS Analog Devices Inc, AD9822JRS Datasheet - Page 14

• Manufacturer Part Number: AD9822JRS
• Description: IC CCD SIGNAL PROC 14BIT 28-SSOP
• Manufacturer: Analog Devices Inc
• Type: CCD Signal Processor, 14-Bitr

Specifications of AD9822JRS

• Rohs Status: RoHS non-compliant
• Input Type: Logic
• Output Type: Logic
• Interface: 3-Wire Serial
• Current - Supply: 73mA
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Analog Front End Type: CCD/CIS
• Analog Front End Category: Video
• Interface Type: Serial (3-Wire)
• Sample Rate: 15MSPS
• Input Voltage Range: 1V
• Operating Supply Voltage (min): 3/4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Resolution: 14b
• Supply Current: 4/73mA
• Number Of Adc's: 1
• Power Supply Type: Analog/Digital
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 28
• Package Type: SSOP
• Number Of Channels: 3
• Lead Free Status / RoHS Status: Not Compliant

AD9822
PGA Gain Registers
There are three PGA registers for individually programming the gain in the red, green, and blue channels. Bits D8, D7, and D6 in each
register must be set low, and Bits D5 through D0 control the gain range in 64 increments. See Figure 15 for the PGA gain vs. the PGA
register code. The coding for the PGA registers is straight binary, with an all 0s word corresponding to the minimum gain setting (1×)
and an all 1s word corresponding to the maximum gain setting (5.7×).
Table 9. PGA Gain Register Settings
D8
Set to 0
0
0
0
0
1
Offset Registers
There are three PGA registers for individually programming the offset in the red, green, and blue channels. Bits D8 through D0 control
the offset range from −350 mV to +350 mV in 512 increments. The coding for the offset registers is sign magnitude, with D8 as the sign
bit. Table 10 shows the offset range as a function of the Bits D8 through D0.
Table 10. Offset Register Settings
D8 (MSB)
0
0
0
1
1
1
1
Power-on default value.
Power-on default value.
D7
0
0
1
0
0
1
D7
Set to 0
0
0
0
0
D6
0
0
1
0
0
1
D6
Set to 0
0
0
0
0
D5
0
0
1
0
0
1
D5
MSB
0
0
1
1
D4
0
0
1
0
0
1
D4
0
0
1
1
Rev. B | Page 14 of 20
D3
0
0
•
•
•
1
0
0
•
•
•
1
D3
0
0
•
•
•
1
1
D2
0
0
1
0
0
1
D2
0
0
1
1
D1
0
0
1
1
D1
0
0
1
0
0
1
D0
LSB
0
1
0
1
1
D0 (LSB)
0
1
1
0
1
1
1
Gain (V/V)
1.0
1.013
•
•
•
5.4
5.7
Offset (mV)
0
+1.2
•
•
•
+350
0
−1.2
•
•
•
−350
Gain (dB)
0.0
0.12
•
•
•
14.6
15.1