LTC1860/LTC1861 Power, 12-Bit, 250ksps 1- and 2-Channel ADCs in MSOP Fea T Descrip T n 12-Bit 250ksps ADCs in MSOP Package The LTC 1860/LTC1861 are 12-bit A/D converters that are n Single 5V Supply offered in MSOP and SO-8 packages and operate on a single n Low Supply Current: 850A (Typ) 5V supply. At 250ksps, the supply current is only 850A. n Auto Shutdown Reduces Supply Current The supply current drops at lower speeds because the to 2A at 1ksps LTC1860/LTC1861 automatically power down to a typical n True Differential Inputs supply current of 1nA between conversions. These 12-bit n 1-Channel (LTC1860) or 2-Channel (LTC1861) switched capacitor successive approximation ADCs include Versions sample-and-holds. The LTC1860 has a differential analog TM n SPI/MICROWIRE Compatible Serial I/O input with an adjustable reference pin. The LTC1861 offers n High Speed Upgrade to LTC1286/LTC1298 a software-selectable 2-channel MUX and an adjustable n Pin Compatible with 16-Bit LTC1864/LTC1865 reference pin on the MSOP version. n Guaranteed Operation to 125C (MSOP Package) The 3-wire, serial I/O, MSOP or SO-8 package and extremely high sample rate-to-power ratio make these a T ADCs ideal choices for compact, low power, high speed n High Speed Data Acquisition systems. n Portable or Compact Instrumentation These ADCs can be used in ratiometric applications or with n Low Power Battery-Operated Instrumentation external references. The high impedance analog inputs and n Isolated and/or Remote Data Acquisition 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. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T Single 5V Supply, 250ksps, 12-Bit Sampling ADC Supply Current vs Sampling Frequency 1F 1000 5V 100 LTC1860 1 8 10 V V REF CC 2 7 + IN SCK ANALOG INPUT SERIAL DATA LINK TO 1 3 6 0V TO 5V IN SDO ASIC, PLD, MPU, DSP OR SHIFT REGISTERS 4 5 GND CONV 1860 TA01 0.1 0.01 0.01 0.1 1 10 100 1000 SAMPLING FREQUENCY (kHz) 1860 TA02 18601fb 1 For more information www.linear.com/LTC1860 SUPPLY CURRENT (A) ion pplica ions pplica ion uresLTC1860/LTC1861 a Te Maxi Mu M r a T (Notes 1, 2) Power Dissipation .............................................. 400mW Supply Voltage (V ) .................................................7V CC Operating Temperature Range Ground Voltage Difference LTC1860C/LTC1861C ...............................0C to 70C AGND, DGND LTC1861 MSOP Package .............0.3V LTC1860I/LTC1861I .......................... 40C to 85C Analog Input ....................(GND 0.3V) to (V + 0.3V) CC LTC1860H/LTC1861H .........................40C to 125C Digital Input .................................... (GND 0.3V) to 7V Storage Temperature Range ...................65C to 150C Digital Output ................... (GND 0.3V) to (V + 0.3V) CC Lead Temperature (Soldering, 10 sec) ..................300C p in c F T LTC1860 LTC1861 TOP VIEW TOP VIEW CONV 1 10 V REF V 1 8 V REF CC CH0 2 9 V + CC 7 SCK IN 2 CH1 3 8 SCK IN 3 6 SDO AGND 4 7 SDO GND 4 5 CONV DGND 5 6 SDI MS8 PACKAGE MS PACKAGE 8-LEAD PLASTIC MSOP 10-LEAD PLASTIC MSOP T = 150C, = 210C/W JMAX JA T = 150C, = 210C/W JMAX JA LTC1860 LTC1861 TOP VIEW TOP VIEW V 1 8 V CONV 1 8 V REF CC CC + IN 2 7 SCK CH0 2 7 SCK IN 3 6 SDO CH1 3 6 SDO GND 4 5 CONV GND 4 5 SDI S8 PACKAGE S8 PACKAGE 8-LEAD PLASTIC SO 8-LEAD PLASTIC SO T = 150C, = 175C/W T = 150C, = 175C/W JMAX JA JMAX JA 18601fb 2 For more information www.linear.com/LTC1860 ion igura on ings bsolu