LTC1401 Complete SO-8, 12-Bit, 200ksps ADC with Shutdown FEATURES DESCRIPTIO Complete 12-Bit ADC with Reference in SO-8 The LTC 1401 is a complete 200ksps, 12-bit A/D con- Single Supply 3V Operation verter that converts 0V to 2.048V unipolar input and draws Sample Rate: 200ksps only 15mW from a single 3V supply. This easy-to-use Power Dissipation: 15mW (Typ) device comes complete with a 315ns sample-and-hold 68dB S/(N + D) and 72dB THD at 50kHz and a precision reference. Maximum DC specifications No Missing Codes Over Temperature include 1LSB INL, 1LSB DNL and 45ppm/C full-scale Nap Mode with Instant Wake-Up: 1.5mW drift over temperature. Sleep Mode: 19.5W The LTC1401 has three power saving modes: Nap and Shutdown Mode: 13.5W Sleep, through the serial interface and Shutdown by High Impedance Analog Input setting the SHDN pin to zero. In Nap mode, it consumes Input Range (0.5mV/LSB): 0V to 2.048V only 1.5mW of power and can wake up and convert Internal Reference Can Be Overdriven Externally immediately. In Sleep (Shutdown) mode, it consumes 3-Wire Interface to DSPs and Processors (SPI and 19.5W (13.5W) of power typically. Upon power-up TM MICROWIRE Compatible) from Sleep or Shutdown mode, a reference ready (REFRDY) U signal is available in the serial word to indicate that the APPLICATIO S reference has settled and the chip is ready to convert. Low Power and Battery-Operated Systems The 3-wire serial port allows compact and efficient data Handheld or Portable Instruments transfer to a wide range of microprocessors, microcon- High Speed Data Acquisition trollers and DSPs. Digital Signal Processing , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Multiplexed Data Acquisition Systems All other trademarks are the property of their respective owners. Telecommunication Digital Radio Spectrum Analysis TYPICAL APPLICATIO Power Consumption vs Sample Rate 100 3.2MHz CLOCK Single 3V Supply, 200kHz, 12-Bit Sampling A/D Converter T = 25C A 10 NORMAL CONVERSION 3V NAP MODE 1 BETWEEN CONVERSION V SHDN CC + 10F 0.1F MPU LTC1401 0.1 ANALOG INPUT A CONV P1.4 IN (0V TO 2.048V) SHUTDOWN MODE BETWEEN CONVERSION 0.01 V 1.20V CLK P1.3 REF + SLEEP MODE BETWEEN GND D P1.2 10F 0.1F OUT CONVERSION SERIAL 0.001 1401 TA01 DATA LINK 0.01 0.1 1 10 100 1k 10k 100k 1M SAMPLE RATE (Hz) LTC1401 TA02 1401fa 1 SUPPLY CURRENT (mA) U ULTC1401 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Notes 1, 2) TOP VIEW Supply Voltage (V ) ................................................. 7V CC V 1 8 SHDN CC Analog Input Voltage (Note 3) ..... 0.3V to (V + 0.3V) CC A CONV 2 7 IN Digital Input Voltage (Note 4) ....................0.3V to 12V V CLK REF 3 6 Digital Output Voltage .................. 0.3V to (V + 0.3V) CC GND D 4 5 OUT Power Dissipation.............................................. 300mW Operating Ambient Temperature Range S8 PACKAGE 8-LEAD PLASTIC SO LTC1401C ............................................... 0C to 70C T = 125C, = 130C/W JMAX JA LTC1401I............................................ 40C to 85C Operating Junction Temperature ......................... 125C S8 PART MARKING ORDER PART NUMBER Storage Temperature Range ................. 65C to 150C LTC1401CS8 1401 Lead Temperature (Soldering, 10 sec).................. 300C LTC1401IS8 1401I Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: