LTC2637 2 Octal 12-/10-/8-Bit I C V OUT DACs with 10ppm/C Reference FEATURES DESCRIPTION n Integrated Precision Reference: The LTC 2637 is a family of octal 12-, 10-, and 8-bit 2.5V Full-Scale 10ppm/C (LTC2637-L) voltage-output DACs with an integrated, high-accuracy, 4.096V Full-Scale 10ppm/C (LTC2637-H) low-drift 10ppm/C reference in 14-lead DFN and 16-lead n Maximum INL Error: 2.5LSB (LTC2637-12) MSOP packages. It has a rail-to-rail output buffer and is n Low Noise: 0.75mV 0.1Hz to 200KHz guaranteed monotonic. The LTC2637-L has a full-scale P-P n Guaranteed Monotonic Over 40C to 125C output of 2.5V, and operates from a single 2.7V to 5.5V Temperature Range supply. The LTC2637-H has a full-scale output of 4.096V, n Selectable Internal or External Reference and operates from a 4.5V to 5.5V supply. Each DAC can n 2.7V to 5.5V Supply Range (LTC2637-L) also operate with an external reference, which sets the DAC n Ultralow Crosstalk Between DACs (<3nVs) full-scale output to the external reference voltage. n Low Power: 100A per DAC at 3V (LTC2637-L) 2 These DACs communicate via a 2-wire I C-compatible n Power-On-Reset to Zero-Scale/Mid-Scale serial interface. The LTC2637 operates in both the standard n Double-Buffered Data Latches mode (clock rate of 100kHz) and the fast mode (clock rate n Tiny 14-Lead 4mm 3mm DFN and 16-Lead MSOP of 400kHz). The LTC2637 incorporates a power-on reset Packages circuit. Options are available for reset to zero-scale or reset to mid-scale in internal reference mode, or reset to APPLICATIONS mid-scale in external reference mode after power-up. n Mobile Communications L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Process Control and Industrial Automation ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property n of their respective owners. Protected by U.S. Patents including 5396245, 5859606, 6891433, Automatic Test Equipment 6937178, 7414561. n Portable Equipment n Automotive n Optical Networking BLOCK DIAGRAM Integral Nonlinearity (LTC2637-LZ12) SWITCH REF INTERNAL REFERENCE V REF GND 2 V = 3V CC V CC INTERNAL REF. 1 V DAC A DAC H V OUTA OUTH V V REF REF 0 V OUTB DAC B DAC G V OUTG V V REF 1 REF V DAC C DAC F OUTC V OUTF 2 0 1024 2048 3072 4095 V V REF REF CODE 2637 TA01 V DAC D DAC E V OUTD OUTE POWER-ON RESET CAO 2 DECODE I C SCL (CA1) ADDRESS DECODE (CA2) SDA 2 I C INTERFACE 2637 BD ( ) MSOP PACKAGE ONLY 2637fb 1 REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER INL (LSB)LTC2637 (Notes 1, 2) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ................................... 0.3V to 6V LTC2637I .............................................40C to 85C CC SCL, SDA ..................................................... 0.3V to 6V LTC2637H (Note 3) ............................ 40C to 125C V - V , Maximum Junction Temperature .......................... 150C OUTA OUTH CA0, CA1, CA2 ...................0.3V to Min(V + 0.3V, 6V) Storage Temperature Range .................. 65C to 150C CC REF ...................................0.3V to Min(V + 0.3V, 6V) Lead Temperature (Soldering, 10 sec) CC Operating Temperature Range MS Package ......................................................300C LTC2637C ................................................ 0C to 70C PIN CONFIGURATION TOP VIEW V 1 14 GND TOP VIEW CC V 2 13 V 1 V 16 GND OUTA CC OUTH V 2 15 V OUTA OUTH V 3 12 V OUTB OUTG V 3 14 V OUTB OUTG 15 V V 4 11 V 4 13 V OUTC OUTC OUTF OUTF V 5 OUTD 12 V OUTE V 5 10 V OUTD OUTE CA2 6 11 REF CA0 6 9 REF CA0 7 10 CA1 SCL 8 9 SDA SCL 7 8 SDA MS PACKAGE 16-LEAD (4mm s 5mm) PLASTIC MSOP DE PACKAGE 14-LEAD (4mm s 3mm) PLASTIC DFN T = 150C, = 110C/W JMAX JA T = 150C, = 37C/W JMAX JA EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB 2637fb 2