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LTC1864AHMS8 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1864AHMS8 Datasheet(HTML) 1 Page - Linear Technology |
1 / 24 page LTC1864/LTC1865 1 18645fb TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION µPower, 16-Bit, 250ksps 1- and 2-Channel ADCs in MSOP The LTC®1864/LTC1865 are 16-bit A/D converters that are offered in MSOP and SO-8 packages and operate on a single 5V supply. At 250ksps, the supply current is only 850μA. The supply current drops at lower speeds because the LTC1864/LTC1865 automatically power down between conversions. These 16-bit switched capacitor successive approximation ADCs include sample-and- holds. The LTC1864 has a differential analog input with an adjustable reference pin. The LTC1865 offers a software- selectable 2-channel MUX and an adjustable reference pin on the MSOP version. The 3-wire, serial I/O, small MSOP or SO-8 package and extremely high sample rate-to-power ratio make these ADCs ideal choices for compact, low power, high speed systems. These ADCs can be used in ratiometric applications or with external references. The high impedance analog inputs and the ability to operate with reduced spans down to 1V full scale, allow direct connection to signal sources in many applications, eliminating the need for external gain stages. Single 5V Supply, 250ksps, 16-Bit Sampling ADC n 16-Bit 250ksps ADCs in MSOP Package n Single 5V Supply n Low Supply Current: 850μA (Typ) n Auto Shutdown Reduces Supply Current to 2μA at 1ksps n True Differential Inputs n 1-Channel (LTC1864) or 2-Channel (LTC1865) Versions n SPI/MICROWIRE™ Compatible Serial I/O n 16-Bit Upgrade to 12-Bit LTC1286/LTC1298 n Pin Compatible with 12-Bit LTC1860/LTC1861 n Guaranteed Operation to +125°C (MSOP Package) n High Speed Data Acquisition n Portable or Compact Instrumentation n Low Power Battery-Operated Instrumentation n Isolated and/or Remote Data Acquisition L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Supply Current vs Sampling Frequency 1 2 3 4 8 7 6 5 VREF IN+ IN– GND VCC SCK SDO CONV LTC1864 18645 TA01 ANALOG INPUT 0V TO 5V 5V 1μF SERIAL DATA LINK TO ASIC, PLD, MPU, DSP OR SHIFT REGISTERS SAMPLING FREQUENCY (kHz) 0.01 1000 100 10 1 0.1 0.01 100 18645 TA02 0.1 1 10 1000 |
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