LTC1864/LTC1865 Power, 16-Bit, 250ksps 1- and 2-Channel ADCs in MSOP FEATURES DESCRIPTION n 16-Bit 250ksps ADCs in MSOP Package The LTC 1864/LTC1865 are 16-bit A/D converters that n Single 5V Supply are offered in MSOP and SO-8 packages and operate n Low Supply Current: 850A (Typ) on a single 5V supply. At 250ksps, the supply current is n Auto Shutdown Reduces Supply Current only 850A. The supply current drops at lower speeds to 2A at 1ksps because the LTC1864/LTC1865 automatically power down n between conversions. These 16-bit switched capacitor True Differential Inputs n successive approximation ADCs include sample-and- 1-Channel (LTC1864) or 2-Channel (LTC1865) holds. The LTC1864 has a differential analog input with an Versions n adjustable reference pin. The LTC1865 offers a software- SPI/MICROWIRE Compatible Serial I/O n selectable 2-channel MUX and an adjustable reference pin 16-Bit Upgrade to 12-Bit LTC1286/LTC1298 n on the MSOP version. Pin Compatible with 12-Bit LTC1860/LTC1861 n Guaranteed Operation to +125C (MSOP Package) 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 APPLICATIONS systems. n High Speed Data Acquisition These ADCs can be used in ratiometric applications or with n Portable or Compact Instrumentation external references. The high impedance analog inputs n Low Power Battery-Operated Instrumentation and the ability to operate with reduced spans down to n Isolated and/or Remote Data Acquisition 1V full scale, allow direct connection to signal sources L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. in many applications, eliminating the need for external gain stages. TYPICAL APPLICATION Single 5V Supply, 250ksps, 16-Bit Sampling ADC Supply Current vs Sampling Frequency 1000 1F 5V 100 LTC1864 10 1 8 V V REF CC 2 7 + 1 IN SCK ANALOG INPUT SERIAL DATA LINK TO 3 6 0V TO 5V ASIC, PLD, MPU, DSP IN SDO OR SHIFT REGISTERS 4 5 0.1 GND CONV 18645 TA01 0.01 0.01 0.1 1 10 100 1000 SAMPLING FREQUENCY (kHz) 18645 TA02 18645fb 1 SUPPLY CURRENT (A)LTC1864/LTC1865 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (V ) .................................................7V Operating Temperature Range CC Ground Voltage Difference LTC1864C/LTC1865C/ AGND, DGND LTC1865 MSOP Package ............ 0.3V LTC1864AC/LTC1865AC ...........................0C to 70C Analog Input ................ (GND 0.3V) to (V + 0.3V) LTC1864I/LTC1865I/ CC Digital Input ................................ (GND 0.3V) to 7V LTC1864AI/LTC1865AI ...................... 40C to 85C Digital Output .............. (GND 0.3V) to (V + 0.3V) LTC1864H/LTC1865H CC Power Dissipation .............................................. 400mW LTC1864AH/LTC1865AH ................. 40C to 125C Storage Temperature Range ...................65C to 150C Lead Temperature (Soldering, 10 sec) ..................300C PIN CONFIGURATION LTC1864 LTC1865 TOP VIEW TOP VIEW CONV 1 10 V REF V 1 8 V REF CC CH0 2 9 V + CC IN 2 7 SCK 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 LTC1864 LTC1865 TOP VIEW TOP VIEW 1 8 V 1 8 V CONV V REF CC CC + 2 7 CH0 2 7 SCK IN 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 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1864CMS8 PBF LTC1864CMS8 TRPBF LTHQ 8-Lead Plastic MSOP 0C to 70C LTC1864IMS8 PBF LTC1864IMS8 TRPBF LTHQ 8-Lead Plastic MSOP 40C to 85C LTC1864HMS8 PBF LTC1864HMS8 TRPBF LTHQ 8-Lead Plastic MSOP 40C to 125C LTC1864ACMS8 PBF LTC1864ACMS8 TRPBF LTHQ 8-Lead Plastic MSOP 0C to 70C LTC1864AIMS8 PBF LTC1864AIMS8 TRPBF LTHQ 8-Lead Plastic MSOP 40C to 85C LTC1864AHMS8 PBF LTC1864AHMS8 TRPBF LTHQ 8-Lead Plastic MSOP 40C to 125C LTC1864CS8 PBF LTC1864CS8 TRPBF 1864 8-Lead Plastic SO 0C to 70C LTC1864IS8 PBF LTC1864IS8 TRPBF 1864I 8-Lead Plastic SO 40C to 85C LTC1864ACS8 PBF LTC1864ACS8 TRPBF 1864A 8-Lead Plastic SO 0C to 70C LTC1684AIS8 PBF LTC1684AIS8 TRPBF 1864AI 8-Lead Plastic SO 40C to 85C LTC1865CMS PBF LTC1865CMS TRPBF LTHS 10-Lead Plastic MSOP 0C to 70C LTC1865IMS PBF LTC1865IMS TRPBF LTHS 10-Lead Plastic MSOP 40C to 85C 18645fb 2