LTC1661 Micropower Dual 10-Bit DAC in MSOP Features Description n Tiny: Two 10-Bit DACs in an 8-Lead MSOP The LTC 1661 integrates two accurate, serially address- Half the Board Space of an SO-8 able, 10-bit digital-to-analog converters (DACs) in a single n Micropower: 60A per DAC tiny MS8 package. Each buffered DAC draws just 60A Sleep Mode: 1A for Extended Battery Life total supply current, yet is capable of supplying DC output n Rail-to-Rail Voltage Outputs Drive 1000pF currents in excess of 5mA and reliably driving capacitive n Wide 2.7V to 5.5V Supply Range loads up to 1000pF. Sleep mode further reduces total n Double Buffered for Independent or Simultaneous supply current to a negligible 1A. DAC Updates Linear Technologys proprietary, inherently monotonic n Reference Range Includes Supply for Ratiometric voltage interpolation architecture provides excellent lin- 0V-to-V Output CC earity while allowing for an exceptionally small external n Reference Input Has Constant Impedance over All form factor. The double-buffered input logic provides Codes (260k Typ)Eliminates External Buffers simultaneous update capability and can be used to write n 3-Wire Serial Interface with Schmitt Trigger Inputs to either DAC without interrupting sleep mode. n Differential Nonlinearity: 0.75LSB Max Ultralow supply current, power-saving sleep mode and a extremely compact size make the LTC1661 ideal for battery-powered applications, while its straightforward n Mobile Communications usability, high performance and wide supply range make n Digitally Controlled Amplifiers and Attenuators it an excellent choice as a general purpose converter. n Portable Battery-Powered Instruments n Automatic Calibration for Manufacturing For additional outputs and even greater board density, n Remote Industrial Devices please refer to the LTC1660 micropower octal DAC for L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear 10-bit applications. For 8-bit applications, please consult Technology Corporation. All other trademarks are the property of their respective owners. the LTC1665 micropower octal DAC. Block Diagram V GND V V OUT A CC OUT B 8 7 6 5 Differential Nonlinearity (DNL) 0.75 0.60 10-BIT 10-BIT DAC A DAC B 0.40 0.20 0 CONTROL ADDRESS 0.20 LOGIC DECODER 0.40 0.60 SHIFT REGISTER 0.75 0 256 512 768 1023 CODE 1661 G02 1 2 3 4 1661 BD CS/LD SCK D REF IN 1661fb For more information www.linear.com/LTC1661 1 LATCH LATCH LATCH LATCH LSB pplicationsLTC1661 aB solute m aximum r (Note 1) V to GND .............................................. 0.3V to 7.5V Operating Temperature Range CC Logic Inputs to GND ............................... 0.3V to 7.5V LTC1661C ............................................... 0C to 70C V , V , REF to GND ...........0.3V to V + 0.3V LTC1661I ............................................ 40C to 85C OUT A OUT B CC Maximum Junction Temperature...........................125C Lead Temperature (Soldering, 10 sec) ................. 300C Storage Temperature Range .................. 65C to 150C p in c F TOP VIEW TOP VIEW CS/LD 1 V 8 OUT A CS/LD 1 8 V OUT A SCK 2 7 GND 7 GND SCK 2 D 3 6 V IN CC D V 3 6 IN CC REF 4 5 V OUT B REF 4 5 V OUT B MS8 PACKAGE 8-LEAD PLASTIC MSOP N8 PACKAGE T = 125C, = 150C/W JMAX JA 8-LEAD PLASTIC DIP T = 150C, = 100C/W JMAX JA o r Der i n F (