wm8215 Wolfson Microelectronics plc, wm8215 Datasheet - Page 18

• Manufacturer Part Number: wm8215
• Description: 60msps 10-bit 3-channel Ccd Digitiser
• Manufacturer: Wolfson Microelectronics plc

WM8215
OVERALL SIGNAL FLOW SUMMARY
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Figure 15 represents the processing of the video signal through the WM8215.
Figure 15 Overall Signal Flow
The INPUT SAMPLING BLOCK produces an effective input voltage V
difference between the input video level V
difference between the input video level V
optionally set via the RLC DAC.
The OFFSET DAC BLOCK then adds the amount of fine offset adjustment required to move the
black level of the input signal towards 0V, producing V
The PGA BLOCK then amplifies the white level of the input signal to maximise the ADC range,
outputting voltage V
The ADC BLOCK then converts the analogue signal, V
The digital output is then inverted, if required, through the OUTPUT INVERT BLOCK to produce D
3
.
IN
and the input reset level V
IN
and the voltage on the VRLC/VBIAS pin, V
2
.
3
, to a 10-bit unsigned digital output, D
RESET
PD, Rev 4.2, February 2009
. For non-CDS this is the
1
. For CDS, this is the
Production Data
1
.
VRLC
2.
18
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