LTC1662 Ultralow Power, Dual 10-Bit DAC in MSOP Features Description n Ultralow Power: 1.5A (Typ) I per DAC Plus The LTC 1662 is an ultralow power, fully buffered voltage CC 0.05A Sleep Mode for Extended Battery Life output, dual 10-bit digital-to-analog converter (DAC). Each n Tiny: Two 10-Bit DACs in an 8-Lead MSOP DAC channel draws just 1.7A (typ) total supply-plus- Half the Size of an SO-8 reference operating current, yet is capable of supplying n Wide 2.7V to 5.5V Supply Range DC output currents in excess of 1mA and reliably driving n Double Buffered for Simultaneous DAC Updates capacitive loads of up to 1000pF. A programmable sleep n Rail-to-Rail Voltage Outputs Drive 1000pF mode further reduces total operating current to 0.05A. n Reference Range Includes Supply for Ratiometric Linear Technologys proprietary, inherently monotonic 0V to V Output CC architecture provides excellent linearity and an exception- n Reference Input Impedance Is Code-Independent ally small external form factor. The double-buffered input (7.1M Typ)Eliminates External Buffers logic provides simultaneous update capability and can be n 3-Wire Serial Interface with Schmitt Trigger Inputs used to write to the DACs without interrupting sleep mode. n Differential Nonlinearity: 0.75LSB Max With its tiny operating current and exceptionally small size, the LTC1662 is ideal for use in the most power- a constrained products. For most designs, there is no perceptible impact on the power budget the LTC1662 n Mobile Communications draws many times less current than even a trimpot, n Portable Battery-Powered Instruments while providing buffered, low impedance (0.5 typical, n Remote or Inaccessible Adjustments V = 5V) rail-to-rail outputs. n CC Digitally Controlled Amplifiers and Attenuators n Factory or Field Calibration The LTC1662 is pin and software compatible with the LTC1661 dual, 60A 10-bit DAC. It is available in 8-pin 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. MSOP and PDIP packages and is specified over the in- dustrial temperature range. Block Diagram V GND V V OUT A CC OUT B Total Supply-Plus-Reference 8 7 6 5 Operating Current 5.0 4.5 5.5V 10-BIT 10-BIT 4.5V 4.0 DAC A DAC B 3.5 3.0 2.5 3.6V 2.0 V = 2.7V CC CONTROL ADDRESS LOGIC DECODER 1.5 1.0 V = V 0.5 REF CC SHIFT REGISTER CODE = 1023 0 55 35 15 5 25 45 65 85 105 125 TEMPERATURE (C) 1662 TA01b 1662 BD 1 2 3 4 CS/LD SCK SDI REF 1662fa 1 LATCH LATCH LATCH LATCH I + I (A) CC REF pplicationsLTC1662 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 LTC1662C ............................................... 0C to 70C V , V , REF to GND ......... 0.3V to (V + 0.3V) LTC1662I ............................................ 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 8 V OUT A CS/LD 1 8 V OUT A SCK 2 7 GND SCK 2 7 GND SDI 3 6 V CC SDI 3 V 6 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 = 125C, = 100C/W JMAX JA o r Der i n F LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1662CMS8 PBF LTC1662CMS8 TRPBF LTKB 8-Lead Plastic MSOP 0C to 70C LTC1662IMS8 PBF LTC1662IMS8 TRPBF LTKC 8-Lead Plastic MSOP 40C to 85C LTC1662CN8 PBF LTC1662CN8 TRPBF LTC1662CN8 8-Lead Plastic DIP 0C to 70C LTC1662IN8 PBF LTC1662IN8 TRPBF LTC1662IN8 8-Lead Plastic DIP 40C to 85C LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1662CMS8 LTC1662CMS8 TR LTKB 8-Lead Plastic MSOP 0C to 70C LTC1662IMS8 LTC1662IMS8 TR LTKC 8-Lead Plastic MSOP 40C to 85C LTC1662CN8 LTC1662CN8 TR LTC1662CN8 8-Lead Plastic DIP 0C to 70C LTC1662IN8 LTC1662IN8 TR LTC1662IN8 8-Lead Plastic DIP 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: