WM8253SCDS/V Wolfson Microelectronics Ltd., WM8253SCDS/V Datasheet - Page 18

• Manufacturer Part Number: WM8253SCDS/V
• Description: Specifications: Manufacturer: Wolfson Microelectronics ; Product Category: ADC (A/D Converters) ; RoHS: Details ; Number of Converters: 1 ; Number of ADC Inputs: 1 ; Conversion Rate: 6 MSPs ; Resolution: 16 bit ; Input Type: Voltage ; Interface
• Manufacturer: Wolfson Microelectronics Ltd.

WM8253
REFERENCES
POWER SUPPLY
POWER MANAGEMENT
OPERATING MODES
Table 3 WM8253 Operating Modes
w
MODE
1
2
3
4
Monochrome/
Colour Line-by-Line
Fast Monochrome/
Colour Line-by-Line
Maximum speed
Monochrome/
Colour Line-by-Line
Slow Monochrome/
Colour Line-by-Line
DESCRIPTION
The ADC reference voltages are derived from an internal bandgap reference, and buffered to pins
VRT and VRB, where they must be decoupled to ground. The output buffer from the RLCDAC also
requires decoupling at pin VRLC/VBIAS when this is configured as an output.
The WM8253 runs from a 3.3V single supply.
Power management for the device is performed via the Control Interface. The device can be powered
on or off completely by setting the EN bit low.
All the internal registers maintain their previously programmed value in power down mode and the
Control Interface inputs remain active.
Table 3 summarises the most commonly used modes, the clock waveforms required and the register
contents required for CDS and non-CDS operation.
AVAILABLE
CDS
Yes
Yes
Yes
No
4.5MSPS
SAMPLE
6MSPS
6MSPS
6MSPS
RATE
MAX
MCLK max = 36MHz
MCLK:VSMP ratio is
6:1
MCLK max = 18MHz
MCLK:VSMP ratio is
3:1
MCLK max = 12MHz
MCLK:VSMP ratio is
2:1
MCLK max = 36MHz
MCLK:VSMP ratio is
2n:1, n  4
REQUIREMENTS
TIMING
SetReg1: 03(hex)
Identical to Mode
1 plus SetReg3:
bits 5:4 must be
set to 0(hex)
CDS not possible
Identical to
Mode 1
CONTENTS WITH
REGISTER
CDS
PD, Rev 4.1, August 2011
SetReg1: 01(hex)
Identical to
Mode 1
SetReg1: 41(hex)
Identical to
Mode 1
WITHOUT CDS
CONTENTS
REGISTER
Production Data
18