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WM8141CFT/V 数据表(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8141CFT/V 数据表(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 31 page  WM8141 12-bit 6MSPS CIS/CCD Analogue Front End/Digitiser Production Data, October 2000, Rev 3.0 WOLFSON MICROELECTRONICS LTD Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 Email: sales@wolfson.co.uk http://www.wolfson.co.uk Production Data Datasheets contain final specifications current on publication date. Supply of products conforms to Wolfson Microelectronics’ Terms and Conditions. 2000 Wolfson Microelectronics Ltd. DESCRIPTION The WM8141 is a 12-bit analogue front end/digitiser that processes and digitises the analogue output signals from CCDs or Contact Image Sensors (CIS). The device can be operated as either a three channel or a single channel device at pixel sample rates of up to 6MSPS. The device has both external and programmable internal black level reference options for CIS operation. The WM8141 runs off a single supply voltage of either 3.3V or 5V. Alternatively, the device can be operated from split 5V core and 3.3V digital interface supplies. The WM8141 includes three analogue signal processing channels each of which contains reset level clamping, correlated double sampling and programmable offset and gain adjust facilities. Each of these channels is time multiplexed into a single high-speed 12-bit resolution ADC, which digitises the pixel image information. The digital data output is available to the user in either 12-bit parallel or 8/6/4-bit wide multiplexed formats. The internal control registers are programmable via a convenient serial or parallel digital interface. The WM8141 typically consumes only 45mA and less than 10 µA when in power down mode. FEATURES • 12-bit resolution ADC • 6MSPS conversion rate at 5V supply • 5V or 3.3V 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) • 12-bit parallel or 8/6/4-bit wide multiplexed output bus • Internally generated voltage references • External or internal reference for CIS operation • Low power – 225mW typical at 5V supply • Interface and timing compatible with WM8143, WM8144 and WM8142 devices • Drop in replacement for WM8143-12 • 32-pin TQFP package APPLICATIONS • Flatbed and sheetfeed scanners • USB compatible scanners • Multi-function peripherals • CCD sensor interface • Contact image sensor (CIS) interface BLOCK DIAGRAM M U X RINP (21) DATA I/O PORT (23) SEN/STB VSMP (27) MCLK (28) VRLC/VBIAS (18) (24) SDI/DNA (25) SCK/RNW DVDD2 (32) TIMING CONTROL CL (26) RLC/ACYC RLC V S R S BINP (19) GINP (20) VRX (17) VRT (16) VREF/BIAS (22) OEB M U X M U X (11) NRESET VRB (15) RLC RLC CDS CDS CDS R G B M U X R G B + PGA I/P SIGNAL POLARITY ADJUST 8 8 OFFSET DAC PGA 8 8 OFFSET DAC PGA 8 OFFSET DAC RLC DAC 8 4 + + + CONFIGURABLE SERIAL/ PARALLEL CONTROL INTERFACE 12 BIT ADC (13) AGND (29) DGND AVDD (12) DVDD1 (14) (30) OP[0] (31) OP[1] (1) OP[2] (2) OP[3] (3) OP[4] (4) OP[5] (5) OP[6] (6) OP[7] (7) OP[8] (8) OP[9] (9) OP[10] (10) OP[11]/SDO + + I/P SIGNAL POLARITY ADJUST I/P SIGNAL POLARITY ADJUST WM8141 |
类似零件编号 - WM8141CFT/V |
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类似说明 - WM8141CFT/V |
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