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LTC1594LIS Datasheet(PDF) 1 Page - Linear Technology |
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LTC1594LIS Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  1 LTC1594L/LTC1598L APPLICATIO S DESCRIPTIO FEATURES TYPICAL APPLICATION The LTC ®1594L/LTC1598L are 3V micropower, 12-bit sampling A/D converters that feature 4- and 8-channel multiplexers, respectively. They typically draw only 160 µA of supply current when converting and automatically power down to a typical supply current of 1nA between conversions. The LTC1594L is available in a 16-pin SO package and the LTC1598L is packaged in a 24-pin SSOP. Both operate on a 3V supply. The 12-bit, switched- capacitor, successive approximation ADCs include a sample-and-hold. On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers over three or four wires. This, coupled with micropower consump- tion, makes remote location possible and facilitates trans- mitting data through isolation barriers. The circuit can be used in ratiometric applications or with an external reference. The high impedance analog inputs and the ability to operate with reduced spans (to 1.5V full scale) allow direct connection to sensors and transducers in many applications, eliminating the need for gain stages. 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters s 12-Bit Resolution on 3V Supply s Low Supply Current: 160 µA Typ s Auto Shutdown to 1nA s Guaranteed ±3/4LSB Max DNL s Guaranteed 2.7V Operation (5V Versions Available: LTC1594/LTC1598) s Multiplexer: 4-Channel MUX (LTC1594L) 8-Channel MUX (LTC1598L) s Separate MUX Output and ADC Input Pins s MUX and ADC May Be Controlled Separately s Sampling Rate: 10.5ksps s I/O Compatible with QSPI, SPI and MICROWIRE TM, etc. s Small Package: 16-Pin Narrow SO (LTC1594L) 24-Pin SSOP (LTC1598L) s Pen Screen Digitizing s Battery-Operated Systems s Remote Data Acquisition s Isolated Data Acquisition s Battery Monitoring s Temperature Measurement MICROWIRE is a trademark of National Semiconductor Corporation. , LTC and LT are registered trademarks of Linear Technology Corporation. SAMPLE FREQUENCY (kHz) 0.1 1 10 100 1000 1 10 100 1594L/98L TA02 TA = 25°C VCC = 2.7V VREF = 2.5V fCLK = 200kHz Supply Current vs Sample Rate 12 µW, 8-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 3V Supply ANALOG INPUTS 0V TO 3V RANGE 1k 1 µF OPTIONAL ADC FILTER 20 21 22 23 24 1 2 3 8 4, 9 MPU SERIAL DATA LINK MICROWIRE AND SPI COMPATABLE 10 6 5, 14 7 11 12 13 18 17 16 15, 19 1 µF 3V 1594L/98L TA01 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM GND CSADC CSMUX CLK DIN DOUT NC NC ADCIN LTC1598L MUXOUT VREF VCC + – 12-BIT SAMPLING ADC 8-CHANNEL MUX |
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