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PDF WM8199 Data sheet ( Hoja de datos )
| Número de pieza | WM8199 | |
| Descripción | 20MSPS 16-bit CCD Digitiser | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
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WM8199
20MSPS 16-bit CCD Digitiser
DESCRIPTION
The WM8199 is a 16-bit analogue front end/digitiser IC
which processes and digitises the analogue output signals
from CCD sensors or Contact Image Sensors (CIS) at pixel
sample rates of up to 20MSPS.
The device includes three analogue signal processing
channels each of which contains Reset Level Clamping,
Correlated Double Sampling and Programmable Gain and
Offset adjust functions. Three multiplexers allow single
channel processing. The output from each of these
channels is time multiplexed into a single high-speed 16-bit
Analogue to Digital Converter. The digital output data is
available in 8 or 4-bit wide multiplexed format.
An internal 4-bit DAC is supplied for internal reference level
generation. This may be used during CDS to reference CIS
signals or during Reset Level Clamping to clamp CCD
signals. An external reference level may also be supplied.
ADC references are generated internally, ensuring optimum
performance from the device.
Using an analogue supply voltage of 5V and a digital
interface supply of either 5V or 3.3V, the WM8199 typically
only consumes 358mW when operating from a single
5V supply.
FEATURES
• 16-bit ADC
• 20MSPS conversion rate
• 30MSPS conversion rate at 8-bits
• Low power – 358mW typical
• 5V single supply or 5V/3.3V dual supply operation
• Single or 3 channel operation
• Correlated double sampling
• Programmable gain (8-bit resolution)
• Programmable offset adjust (8-bit resolution)
• Programmable clamp voltage
• 8 or 4-bit wide multiplexed data output formats
• Internally generated voltage references
• 28-pin SSOP package
• Serial control interface
APPLICATIONS
• Flatbed and sheetfeed scanners
• USB compatible scanners
• Multi-function peripherals
• High-performance CCD sensor interface
BLOCK DIAGRAM
VRLC/VBIAS
VSMP MCLK
AVDD DVDD1 DVDD2
RINP
CL
RLC
RS VS
M
U
X
TIMING CONTROL
w
WM8199
CDS
RM
GU
X
B
8
OFFSET
DAC
VREF/BIAS
+ PGA
RM
GU
X
B
I/P SIGNAL
8 POLARITY
ADJUST
GINP
RLC
CDS
+ PGA
8 OFFSET
DAC
8 I/P SIGNAL
POLARITY
ADJUST
VRT VRX VRB
+
M
+U
X
16-
BIT
ADC
DATA
I/O
PORT
BINP
RLC
RLC 4
DAC
CDS
+ PGA
+
8 OFFSET
DAC
8 I/P SIGNAL
POLARITY
ADJUST
CONFIGURABLE
SERIAL
CONTROL
INTERFACE
OEB
OP[0]
OP[1]
OP[2]
OP[3]
OP[4]
OP[5]
OP[6]
OP[7]/SDO
SEN
SCK
SDI
RLC/ACYC
AGND1
AGND2
DGND
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
Production Data, November 2003, Rev 3.2
Copyright 2003 Wolfson Microelectronics plc
1 page  
WM8199
Production Data
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at
or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical
Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible
to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
MIN MAX
Analogue supply voltage: AVDD
GND - 0.3V
GND + 7V
Digital supply voltages: DVDD1 − 2
GND - 0.3V
GND + 7V
Digital ground: DGND
GND - 0.3V
GND + 0.3V
Analogue grounds: AGND1 − 2
GND - 0.3V
GND + 0.3V
Digital inputs, digital outputs and digital I/O pins
GND - 0.3V
DVDD2 + 0.3V
Analogue inputs (RINP, GINP, BINP)
GND - 0.3V
AVDD + 0.3V
Other pins
GND - 0.3V
AVDD + 0.3V
Operating temperature range: TA
Storage temperature after soldering
Package body temperature (soldering, 10 seconds)
0°C
-65°C
+70°C
+150°C
+260°C
Package body temperature (soldering, 2 minutes)
+183°C
Notes:
1. GND denotes the voltage of any ground pin.
2. AGND1, AGND2 and DGND pins are intended to be operated at the same potential. Differential voltages
between these pins will degrade performance.
RECOMMENDED OPERATING CONDITIONS
CONDITION
Operating temperature range
Analogue supply voltage
Digital core supply voltage
Digital I/O supply voltage
5V I/O
3.3V I/O
SYMBOL
TA
AVDD
DVDD1
DVDD2
DVDD2
MIN
0
4.75
4.75
4.75
2.97
TYP
MAX
UNITS
70 °C
5.0 5.25
V
5.0 5.25
V
5.0 5.25
V
3.3 3.63
V
w
PD Rev 3.2 November 2003
5
5 Page 
WM8199
Test Conditions
AVDD = DVDD1 = 5.0V, DVDD2 = 23.3V, AGND = DGND = 0V, TA = 25°C unless otherwise stated.
PARAMETER
SCK period
SYMBOL
tSPER
TEST CONDITIONS
SCK high
tSCKH
SCK low
tSCKL
SDI set-up time
tSSU
SDI hold time
tSH
SCK to SEN set-up time
tSCE
SEN to SCK set-up time
tSEC
SEN pulse width
tSEW
SEN low to SDO = Register data
tSERD
SCK low to SDO = Register data
tSCRD
SCK low to SDO = ADC data
tSCRDZ
Note:
1. Parameters are measured at 50% of the rising/falling edge
MIN
41.6
18.8
18.8
6
6
12
12
25
TYP
Production Data
MAX
30
30
30
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
w
PD Rev 3.2 November 2003
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8199.PDF ] | |
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