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LTC1197CMS8

製品説明
仕様・特性

LTC1197/LTC1197L LTC1199/LTC1199L 10-Bit, 500ksps ADCs in MSOP with Auto Shutdown U FEATURES s s s s s s s s DESCRIPTIO 8-Pin MSOP and SO Packages 10-Bit Resolution at 500ksps Single Supply: 5V or 3V Low Power at Full Speed: 25mW Typ at 5V 2.2mW Typ at 2.7V Auto Shutdown Reduces Power Linearly at Lower Sample Rates 10-Bit Upgrade to 8-Bit LTC1196/LTC1198 SPI and MICROWIRETM Compatible Serial I/O Low Cost U APPLICATIO S s s s High Speed Data Acquisition Portable or Compact Instrumentation Low Power or Battery-Operated Instrumentation The LTC ®1197/LTC1197L/LTC1199/LTC1199L are 10-bit A/D converters with sampling rates up to 500kHz. They have 2.7V (L) and 5V versions and are offered in 8-pin MSOP and SO packages. Power dissipation is typically only 2.2mW at 2.7V (25mW at 5V) during full speed operation. The automatic power down reduces supply current linearly as sample rate is reduced. These 10-bit, switched-capacitor, successive approximation ADCs include a sample-and-hold. The LTC1197/LTC1197L have a differential analog input with an adjustable reference pin. The LTC1199/LTC1199L offer a software-selectable 2-channel MUX. The 3-wire serial I/O, MSOP and SO-8 packages, 2.7V operation and extremely high sample rate-to-power ratio make these ADCs ideal choices for compact, low power high speed systems. These circuits can be used in ratiometric applications or with external references. The high impedance analog inputs and the ability to operate with reduced spans below 1V full scale (LTC1197/LTC1197L) allow direct connection to signal sources in many applications, eliminating the need for gain stages. , LTC and LT are registered trademarks of Linear Technology Corporation. MICROWIRE is a trademark of National Semiconductor Corporation. U TYPICAL APPLICATIO Supply Current vs Sampling Frequency Single 2.7V Supply, 250ksps, 10-Bit Sampling ADC 10000 1µF LTC1197L 1 2 ANALOG INPUT 0V TO 2.7V RANGE 3 4 CS VCC +IN CLK – IN DOUT GND VREF 8 7 6 SERIAL DATA LINK TO ASIC, PLD, MPU, DSP OR SHIFT REGISTERS SUPPLY CURRENT (µA) 1000 2.7V VCC = 5V fCLK = 7.2MHz 100 10 VCC = 2.7V fCLK = 3.5MHz 1 5 1197/99 TA01 0.1 0.01 0.1 10 100 1 SAMPLING FREQUENCY (kHz) 1000 1197/99 G03 1

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