LTC1654 Dual 14-Bit Rail-to-Rail DAC in 16-Lead SSOP Package FEATURES DESCRIPTIO The LTC 1654 is a dual, rail-to-rail voltage output, 14-bit 14-Bit Monotonic Over Temperature digital-to-analog converter (DAC). It is available in a Individually Programmable Speed/Power: 16-lead narrow SSOP package, making it the smallest dual 3s Settling Time at 930A 14-bit DAC available. It includes output buffer amplifiers 8.5s Settling Time at 540A and a flexible serial interface. 3V to 5V Single Supply Operation Maximum Update Rate: 0.9MHz The LTC1654 has REFHI pins for each DAC that can be Buffered True Rail-to-Rail Voltage Outputs driven up to V . The output will swing from 0V to V in CC CC User Selectable Gain a gain of 1 configuration or V /2 in a gain of 1/2 configu- CC Power-On Reset and Clear Function ration. It operates from a single 2.7V to 5.5V supply. Schmitt Trigger On Clock Input Allows Direct The LTC1654 has two programmable speeds: a FAST and Optocoupler Interface SLOW mode with 1LSB settling times of 3s or 8.5s Smallest Dual 14-Bit DAC: 16-Lead Narrow respectively and supply currents of 930A and 540A in SSOP Package the two modes. The LTC1654 also has shutdown capabil- U ity, power-on reset and a clear function to 0V. APPLICATIO S , LTC and LT are registered trademarks of Linear Technology Corporation. Digital Calibration All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5396245. Industrial Process Control Automatic Test Equipment Offset/Gain Adjustment Multiplying DAC BLOCK DIAGRA CS/LD REFHI B CONTROL LOGIC SCK INPUT DAC SDI DAC B + LATCH REGISTER V OUT B 32-BIT X /X B 1 1/2 SHIFT REFHI A REGISTER INPUT DAC DAC A + LATCH REGISTER V OUT A SDO POWER-ON CLR RESET X /X A 1 1/2 1654 BD REFLO B REFLO A 1654fb 1 W ULTC1654 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) V to GND .............................................. 0.5V to 7.5V TOP VIEW ORDER PART CC NUMBER TTL Input Voltage, REFHI, X /X B 1 16 V 1 1/2 CC REFLO, X /X ........................................ 0.5V to 7.5V CLR 2 15 V 1 1/2 OUT B LTC1654CGN V , SDO .................................. 0.5V to (V + 0.5V) SCK 3 14 REFHI B OUT CC LTC1654IGN SDI 4 13 REFLO B Operating Temperature Range CS/LD 5 12 AGND LTC1654C ............................................. 0C to 70C DGND 6 11 REFLO A LTC1654I ........................................ 40C to 85C SDO 7 10 REFHI A GN PART MARKING Maximum Junction Temperature .......................... 125C X /X A 8 9 V 1 1/2 OUT A Storage Temperature Range ................ 65C to 150C 1654 GN PACKAGE Lead Temperature (Soldering, 10 sec)................. 300C 16-LEAD PLASTIC SSOP 1654I T = 125C, = 110C/W JMAX JA Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: