|
Details, datasheet, quote on part number:WM8144-10
| |
| Part: | WM8144-10 |
| Category: | Data Conversion => Data Acquisition |
| Description: | Integrated 10-bit Data Acquisition System For Imaging Applications |
| Company: | Wolfson Microelectronics Ltd. |
| Datasheet: | Download WM8144-10 datasheet File size : 405 kB |
| Request For quote: | Find where to buy WM8144-10
|
| |
Datasheet text preview:
WM8144-10
Production Data October 1997 Rev. 3.0
Integrated 10-bit Data Acquisition system for Imaging Applications
Description
WM8144-10 integrates the analogue signal conditioning required by CCD sensors with a 10-bit ADC and optional pixel-by-pixel image compensation. WM8144-10 requires minimal external circuitry and provides a cost effective sensor-to-digital domain system solution. Each analogue conditioning channel provides reset level c l a m p , CDS, fine offset level shifting and gain amplification. The three channels are multiplexed into the ADC. Output from the ADC can either be direct or passed through a digital post-processing function. The postprocessing provides compensation for variations in offset and shading on a pixel-by-pixel basis. The flexible output architecture allows ten-bit data to be accessed either on a ten-bit bus or via a time-multiplexed eight-bit bus. The WM8144-10 can be configured for pixelby-pixel or line-by-line multiplexing operation. Reset level clamp and/or CDS features can be optionally bypassed. Device configuration is either by a simple serial or eightbit parallel interface.
Features
· · · · · · · · · · · Reset level clamp Correlated Double Sampling (CDS) Fine offset level shifting Programmable Gain Amplification 10-Bit ADC with maximum 6 MSPS Digital post-processing for pixel-by-pixel i m a g e compensation S i m p l e clocking scheme Control by serial or parallel interface Time-multiplexed eight-bit data output mode 48 pin TQFP package Pin compatible with WM8144-12
Applications
· · · D o c u m e n t scanners C C D sensor interfaces C o n t a c t image sensor (CIS) interfaces
Block Diagram
VRLC VRU VRT VRB VRL VMID VSMP MCLK RLC AVDD AGND DVDD1 DVDD2 DGND MUX CC[2:0] VMID CL RS VS TIMING CONTROL DV
RINP S/H CDS
S/H PGA 5-BIT REG
OFFSET
WM8144-10
8-BIT + SIGN DAC VMID
EXTERNAL DATA STORE INTERFACE
CDATA(7:0)
ORNG GINP S/H CDS S/H PGA 5-BIT REG OFFSET M U X 8-BIT + SIGN DAC 10 BIT ADC IMAGE COMPENSATION PROCESSING 10/8 MUX OEB OP[9:0]
VMID OFFSET
BINP S/H CDS
S/H PGA 5-BIT REG
PNS CONFIGURABLE SERIAL/PARALLEL CONTROL INTERFACE VMID SDI / DNA SCK / RNW SEN / STB NRESET
8-BIT + SIGN DAC
Production Data data sheets contain final specifications current on publication date. Supply of products conforms to Wolfson Microelectronics standard terms and conditions
Wolfson Microelectronics
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK
© 1997 Wolfson Microelectronics
Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 email: admin@wolfson.co.uk www: http://www.wolfson.co.uk
WM8144-10
Package Outline
SCK/RNW SDI/DNA SEN/STB CDATA4 CDATA5 CDATA6 CDATA7 DVDD1 RLC VSMP MCLK OEB
Ordering Information
DEVICE TEM P RANGE 0 0 W M8 144-1 0CFT/V 0 C - 70 C PACKAGE 48 Pin TQFP
36
35
34
33 32
31
30
29
28
27 26
25 24 23 22 21 20 19 18 17 16 15 14 13
CDATA3 CDATA2 CDATA1 CDATA0 DGND OP9 OP8 OP7 OP6 OP5 OP4 OP3
37 38 39 40 41 42 43 44 45 46 47 48 10 11 12 1 2 3 4 5 6 7 8 9 WM8144-10
PNS RINP GINP BINP VMID VRLC AGND AVDD VRL VRU VRB VRT
OP1 OP0 DVDD2
OP2
DV
NC
NC
CC2
CC1
CC0 ORNG
NC - Make no external connection
Absolute Maximum Ratings
Analogue Supply Voltage. . . AGND - 0.3 V, AGND +7 V Digital Supply Voltage. . . . DGND - 0.3 V, DGND +7 V Digital Inputs . . . . . . . . DGND - 0.3 V, DVDD + 0.3 V Digital Outputs. . . . . . . .DGND - 0.3 V, DVDD + 0.3 V Reference inputs . . . . . . AGND - 0.3 V, AVDD + 0.3 V RINP, GINP, BINP . . . . . .AGND - 0.3 V, AVDD + 0.3 V
NRESET
Operating temperature range, TA . . . . . 0oC to +70oC Storage Temperature . . . . . . . . . . -50oC to +150oC Lead Temperature (soldering, 10 sec) . . . . . . +260oC
Note: 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 range limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified. ESD Sensitive Device. The WM8144-10 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. As per JEDEC specifications A112-A and A113-A this product requires specific storage conditions prior to surface mount assembly. It has been classified as having a Moisture Sensitivity level of 2 and as such will be supplied in vacuum sealed moisture barrier bags.
Recommended Operating Conditions
PARAM ETER Supply Voltage Oper ating Temperature Range Input Common Mode Range TEST CONDITIONS M IN 4.75 0 0.5 TY P M AX UNIT 5.25 70 4.5 V
o
TA
VCMR
C V
Wolfson Microelectronics
2
WM8144-10
Electrical Characteristics
VDD = 4.75V to 5.25V, GND = 0 V, ........TA = 0oC to +70oC, MLCK = 12MHz unless otherwise stated.
PARAM ETER Su pp ly Current - Active Su pp ly Current - Standby Dig ital Inputs Hig h Level Input Voltage Lo w Level Input Voltage Hig h Level Input Current Lo w Level Input Current In pu t Capacitance Dig ital Outputs Hig h Level Output Voltage Vo lta ge output range Hig h Impedance Output Current In put Multiplexer Cha nn el to Channel Gain Matching In pu t Video Set-up Time In pu t Video Hold Time Res e t Video Set-up Time Res e t Video Hold Time Refe ren ce String Ref ere nc e Voltage - Top Ref ere nc e Voltage - Bottom DAC Reference Voltage R.L .C. Switch Impedence Res e t Level Clamp Options VRL C VR U = 5.00 V, VRL = 0.00V Vo lta ge set by user c on fig ura tio n - Table 7 Im p ed an ce VRT to VRB Im p ed an ce VRU to VRL 8-b it DACs Res o lut io n Ze ro Code Voltage Fu ll Scale Voltage Error Dif fer ent ia l Non Linearity In te gral Non Linearity DNL INL 8 VDAC -10 0 0. 1 0. 4 VD AC +10 10 Bi ts mV mV 1. 42 5 2.375 3. 32 5 49 0 11 90 VR T V RB VR U = 5.00 V, VRL = 0.00V VR U = 5.00 V, VRL = 0.00V 3. 46 5 1. 46 5 2. 47 5 3. 5 1. 5 2. 5 20 0 1. 5 2. 5 3. 5 70 0 17 00 1. 57 5 2. 62 5 3. 67 5 3. 53 5 1. 53 5 2. 52 5 V V V Ohm s V V V tVSU tV H tRS U CDS Mode only tRH CDS Mode only 10 25 10 25 0. 5 % ns ns ns ns VOH VOL I OZ IOH = 1.0mA IOL = 1.0mA
D VD D -0.75 D GND + 0.75
TES T CONDITIONS
M IN
TYP 11 0. 0 10 .0
M AX UNIT 15 0 15 mA mA V 0. 2*DVDD 1. 0 1. 0 V µA µA pF V 1.0 V µA
VIH V IL IIH I IL
0. 8*DVDD
10 .0
VMID VR U = 5.00 V, VRL = 0.00V
91 0 Ohm s 22 10 Ohm s
1 LS B 1 LS B
Wolfson Microelectronics
3
|
|
