PDF WM8232 Data sheet ( Hoja de datos )

Número de pieza	WM8232
Descripción	70MSPS 3-Channel AFE
Fabricantes	Wolfson Microelectronics
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No Preview Available ! w WM8232 70MSPS 3-Channel AFE with Sensor Timing Generation and LVDS/CMOS Data Output DESCRIPTION The WM8232 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 35MSPS. The device has three analogue signal processing channels each of which contains Reset Level Clamping, Correlated Double Sampling (also Sample and Hold), Programmable Gain, Automatic Gain Control (AGC) and Offset adjust functions. The output from each of these channels is time multiplexed, in pairs, into three high-speed 16-bit Analogue to Digital Converters. The digital data is available in a variety of output formats via the flexible data port. The WM8232 has a user selectable LVDS or CMOS output architecture. An internal 8-bit DAC is supplied for internal reference level generation. This may be used during CDS to reference CIS signals or during Clamping to clamp CCD signals. An external reference level may also be supplied. ADC references are generated internally, ensuring optimum performance from the device. A programmable automatic Black Level Calibration function is available to adjust the DC offset of the output data. The WM8232 features a sensor timing clock generator for both CCD and CIS sensors. The clock generator can accept a slow or fast reference clock input and also has a flexible timing adjustment function for output timing clocks to allow use of many different sensors. FEATURES  70MSPS conversion rate  16 bit ADC resolution  Current consumption – 230mA  3.3V single supply operation  Sample and hold /correlated double sampling  Programmable offset adjust (8-bit resolution)  Flexible clamp timing  Pixel clamp / line clamp mode  Programmable clamp voltage  Programmable CIS/CCD timing generator  Internally generated voltage references  Compliant for Spread Spectrum Clock  LVDS/CMOS output options - LVDS 5pair 490MHz 35-bit data - CMOS 90MHz output maximum  Complete on chip clock generator. MCLK 5MHz to 35MHz  Internal timing adjustment  Automatic Gain Control  Automatic Black Level Calibration  56-lead QFN package 8mm x 8mm  Serial control interface APPLICATIONS  Digital Copiers  USB2.0 compatible scanners  Multi-function peripherals  High-speed CCD/CIS sensor interface WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Product Brief, February 2012, Rev 3.0 Copyright 2012 Wolfson Microelectronics plc. 1 page WM8232 Product Brief PIN DESCRIPTION PIN NAME Type DESCRIPTION 1 VREF2C Analogue output Mid reference voltage. This pin must be connected to AGND via a decoupling capacitor. 2 VRLC/VBIAS Analogue I/O Reference voltage input/output 3 VREF3C Analogue output Lower reference voltage. This pin must be connected to AGND via a decoupling capacitor. 4 VREF1C Analogue output Upper reference voltage. This pin must be connected to AGND via a decoupling capacitor. 5 SEN Digital input Enables the serial interface when high. 6 SDO Digital output Serial interface data output 7 SCK Digital input Serial interface clock 8 SDI Digital input Serial interface data input 9 LDO2VDD Supply Analogue supply 10 LDO2GND Supply Analogue ground 11 LDO2VOUT Supply LDO output. This pin must be connected to AGND via a decoupling capacitor. 12 DSLCT2 Analogue input Device select 2 13 MCLK Analogue input Master Clock 14 DSLCT1 Analogue input Device select 1 15 D5N/OP[9] LVDS output LVDS Data output 5 – Negative / CMOS output 11 16 D5P/OP[8] LVDS output LVDS Data output 5 – Positive / CMOS output 10 17 D4N/OP[7] LVDS output LVDS Data output 4 – Negative / CMOS output 9 18 D4P/OP[6] LVDS output LVDS Data output 4 – Positive / CMOS output 8 19 DCLKN/OC[2] LVDS output LVDS Clock Output – Negative/ CMOS output 7 20 DCLKP/OC[1] LVDS output LVDS Clock Output – Positive/ CMOS output 6 21 DBGND Supply Analogue ground 22 DBVDD Supply Analogue supply 23 D3N/OP[5] LVDS output LVDS Data output 3 – Negative / CMOS output 5 24 D3P/OP[4] LVDS output LVDS Data output 3 – Positive / CMOS output 4 25 D2N/OP[3] LVDS output LVDS Data output 2 – Negative / CMOS output 3 26 D2P/OP[2] LVDS output LVDS Data output 2 – Positive / CMOS output 2 27 D1N/OP[1] LVDS output LVDS Data output 1 – Negative / CMOS output 1 28 D1P/OP[0] LVDS output LVDS Data output 1 – Positive / CMOS output 0 29 HZCTRL Digital input Internal use only. Must be connected to AGND. 30 MON Analogue output Clock monitor 31 LDO1VOUT Supply LDO output. This pin must be connected to AGND via a decoupling capacitor. 32 LDO1GND Supply Analogue ground 33 LDO1VDD Supply Analogue supply 34 TGSYNC Digital input Sensor Timing Sync pulse from host 35 CLK1 Digital output Sensor Timing Output 1 36 CLK2 Digital output Sensor Timing Output 2 37 CLK3 Digital output Sensor Timing Output 3 38 CLK4 Digital output Sensor Timing Output 4 39 CLK5 Digital output Sensor Timing Output 5 40 CLK6 Digital output Sensor Timing Output 6 41 CLK7 Digital output Sensor Timing Output 7 42 CLK8 Digital output Sensor Timing Output 8 43 CLK9 Digital output Sensor Timing Output 9 44 CLK10 Digital output Sensor Timing Output 10 45 CLK11 Digital output Sensor Timing Output 11 46 AGND3 Supply Analogue ground 47 NC Not connect Not connected internally w Product Brief, Rev 3.0, February 2012 5 5 Page WM8232 Product Brief APPLICATION INFORMATION RECOMMENDED EXTERNAL COMPONENTS AVDD1 AVDD2 DBVDD LDO1VDD LDO2VDD 55 AVDD1 C1 50 AVDD2 C2 22 DBVDD C3 33 LDO1VDD C4 9 LDO2VDD C5 AGND1 56 AGND2 49 AGND3 46 VREF1C VREF2C VREF3C 4 1 3 AGND C8 C7 C6 C9 C10 AGND 2 VRLC/VBIAS C11 LDO1VOUT 31 LDO2VOUT 11 C12 AGND C13 AVDD1 AVDD2 DBVDDLDO1VDD LDO2VDD AGND WM8232 Video Inputs Timing Signals Interface Controls 48 IN1 52 IN2 54 IN3 13 MCLK 34 TGSYNC 8 SDI 7 SCK 5 SEN 14 DSLCT1 12 DSLCT2 D1P/OP[0] 28 D1N/OP[1] 27 D2P/OP[2] 26 D2N/OP[3] 25 D3P/OP[4] 24 D3N/OP[5] 23 DCLKP/OC[1] 20 DCLKN/OP[2] 19 D4P/OP[6] 18 D4N/OP[7] 17 D5P/OP[8] 16 D5N/OP[9] 15 CLK1 35 CLK2 36 CLK3 37 CLK4 38 CLK5 39 CLK6 40 CLK7 41 CLK8 42 CLK9 43 CLK10 44 CLK11 45 NOTES: 1. C1-20 should be fitted as close to device as possible. 2. AGND should be connected as close to device as possible. Figure 1 External Components Diagram AGND Output Data Bus C14 C15 C16 C17 C18 AGND LDO1VOUT LDO2VOUT C19 C20 Timing generator Outputs AGND w Product Brief, Rev 3.0, February 2012 11 11 Page

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