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LTC1290BCSW 数据表(PDF) 1 Page - Linear Technology |
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LTC1290BCSW 数据表(HTML) 1 Page - Linear Technology |
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1 / 32 page  1 LTC1290 1290fe , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5287525. DESCRIPTIO KEY SPECIFICATIO S FEATURES Single Chip 12-Bit Data Acquisition System 12-Bit 8-Channel Sampling Data Acquisition System CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM DGND VCC ACLK SCLK DIN DOUT CS REF + REF – V – AGND LTC1290 DIFFERENTIAL INPUT (+) ±5V COMMON MODE RANGE (–) • • • • • • 1k SINGLE-ENDED INPUT 0V TO 5V OR ±5V ±15V OVERVOLTAGE RANGE* TO AND FROM MICROPROCESSOR 0.1 µF 1N5817 –5V 22 µF TANTALUM 1N5817 1N4148 4.7 µF TANTALUM 1 µF LT ®1027 5V 8V TO 40V * FOR OVERVOLTAGE PROTECTION ON ONLY ONE CHANNEL LIMIT THE INPUT CURRENT TO 15mA. FOR OVERVOLTAGE PROTECTION ON MORE THAN ONE CHANNEL LIMIT THE INPUT CURRENT TO 7mA PER CHANNEL AND 28mA FOR ALL CHANNELS. (SEE SECTION ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION SECTION.) CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED OR ANY OTHER CHANNEL IS OVERVOLTAGED (VIN < V – OR V IN > VCC). 1290 • TA01 + + The LTC ®1290 is a data acquisition component which contains a serial I/O successive approximation A/D con- verter. It uses LTCMOS TM switched capacitor technology to perform either 12-bit unipolar or 11-bit plus sign bipolar A/D conversions. The 8-channel input multiplexer can be configured for either single-ended or differential inputs (or combinations thereof). An on-chip sample-and-hold is included for all single-ended input channels. When the LTC1290 is idle it can be powered down with a serial word in applications where low power consumption is desired. The serial I/O is designed to be compatible with industry standard full duplex serial interfaces. It allows either MSB- or LSB-first data and automatically provides 2's comple- ment output coding in the bipolar mode. The output data word can be programmed for a length of 8, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors. ■ Software Programmable Features – Unipolar/Bipolar Conversion – Four Differential/Eight Single-Ended Inputs – MSB- or LSB-First Data Sequence – Variable Data Word Length – Power Shutdown ■ Built-In Sample-and-Hold ■ Single Supply 5V or ±5V Operation ■ Direct Four-Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports ■ 50kHz Maximum Throughput Rate ■ Available in 20-Lead PDIP and SO Wide Packages ■ Resolution: 12 Bits ■ Fast Conversion Time: 13 µs Max Over Temp ■ Low Supply Current: 6.0mA TYPICAL APPLICATIO |
类似零件编号 - LTC1290BCSW |
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类似说明 - LTC1290BCSW |
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