Datasheet LTC1197, LTC1197L, LTC1199, LTC1199L (Analog Devices)

LTC1197/LTC1197L LTC1199/LTC1199L 10-Bit, 500ksps ADCs in MSOP with Auto Shutdown
U FEATURES DESCRIPTIO
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8-Pin MSOP and SO Packages
The LTC®1197/LTC1197L/LTC1199/LTC1199L are ■ 10-Bit Resolution at 500ksps 10-bit A/D converters with sampling rates up to 500kHz. ■ Single Supply: 5V or 3V They have 2.7V (L) and 5V versions and are offered in ■ Low Power at Full Speed: 8-pin MSOP and SO packages. Power dissipation is typi- 25mW Typ at 5V cally only 2.2mW at 2.7V (25mW at 5V) during full speed 2.2mW Typ at 2.7V operation. The automatic power down reduces supply ■ Auto Shutdown Reduces Power Linearly current linearly as sample rate is reduced. These 10-bit, at Lower Sample Rates switched-capacitor, successive approximation ADCs in- ■ 10-Bit Upgrade to 8-Bit LTC1196/LTC1198 clude a sample-and-hold. The LTC1197/LTC1197L have a ■ SPI and MICROWIRETM Compatible Serial I/O differential analog input with an adjustable reference pin. ■
Low Cost
The LTC1199/LTC1199L offer a software-selectable 2-channel MUX.
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The 3-wire serial I/O, MSOP and SO-8 packages, 2.7V
APPLICATIO S
operation and extremely high sample rate-to-power ratio ■ High Speed Data Acquisition make these ADCs ideal choices for compact, low power ■ Portable or Compact Instrumentation high speed systems. ■ Low Power or Battery-Operated Instrumentation 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 connec- tion 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 1000 2.7V µA) VCC = 5V fCLK = 7.2MHz 100 LTC1197L 1 8 CS VCC 10 SERIAL DATA LINK TO 2 7 +IN CLK ASIC, PLD, MPU, DSP VCC = 2.7V ANALOG INPUT OR SHIFT REGISTERS SUPPLY CURRENT ( f 3 6 CLK = 3.5MHz 0V TO 2.7V RANGE – IN DOUT 1 4 5 GND VREF 1197/99 TA01 0.10.01 0.1 1 10 100 1000 SAMPLING FREQUENCY (kHz) 1197/99 G03 1