LTC2640 Single 12-/10-/8-Bit SPI V DACs with OUT 10ppm/C Reference FEATURES DESCRIPTION n Integrated Precision Reference The LTC 2640 is a family of 12-, 10-, and 8-bit voltage- 2.5V Full-Scale 10ppm/C (LTC2640-L) output DACs with an integrated, high-accuracy, low-drift 4.096V Full-Scale 10ppm/C (LTC2640-H) reference in an 8-lead TSOT-23 package. It has a rail-to-rail n Maximum INL Error: 1LSB (LTC2640A-12) output buffer that is guaranteed monotonic. n Bidirectional Reference: Input or 10ppm/C Output The LTC2640-L has a full-scale output of 2.5V, and operates n Low Noise (0.7mVpp, 0.1Hz to 200kHz) from a single 2.7V to 5.5V supply. The LTC2640-H has a n Guaranteed Monotonic Over Temperature full-scale output of 4.096V, and operates from a 4.5V to n 2.7V to 5.5V Supply Range (LTC2640-L) 5.5V supply. A 10ppm/C reference output is available at n Low Power Operation: 180A at 3V the REF pin. n Power Down to 1.8A Maximum (C and I Grades) n Each DAC can also operate in External Reference mode, Asynchronous DAC Clear Pin (LTC2640-Z) n in which a voltage supplied to the REF pin sets the full- Power-On Reset to Zero or Mid-Scale options n scale output. Double-Buffered Data Latches n Guaranteed Operation from 40C to 125C (H-Grade) The LTC2640 DACs use a SPI/MICROWIRE compatible n 8-Lead TSOT-23 (ThinSOT) Package 3-wire serial interface which operates at clock rates up to 50MHz. APPLICATIONS The LTC2640 incorporates a power-on reset circuit. Op- n Mobile Communications tions are available for Reset to Zero-Scale or Reset to n Process Control and Industrial Automation Mid-Scale after power-up. n Automatic Test Equipment L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their Portable Equipment respective owners. Protected by U.S. Patents, including 5396245, 5859606, 6891433, 6937178 n Automotive and 7414561. n Optical Networking (LTC2640-Z) BLOCK DIAGRAM V REF CC Integral Nonlinearity (LTC2640A-LZ12) 1.0 V = 3V INTERNAL CC SWITCH V = 2.5V SDI REFERENCE FS 0.5 CONTROL RESISTOR DECODE LOGIC DIVIDER 24-BIT SCK 0 SHIFT REGISTER DACREF 0.5 CS/LD V OUT INPUT DAC DAC REGISTER REGISTER 1.0 0 1024 2048 3072 4095 CODE GND CLR 2640 TA01b 2640 TA01 2640fd 1 For more information www.linear.com/LTC2640 INL (LSB)LTC2640 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (V ) ................................... 0.3V to 6V Maximum Junction Temperature .......................... 150C CC CLR, CS/LD, REF SEL, SCK, SDI ................. 0.3V to 6V Storage Temperature Range .................. 65C to 150C V , REF .........................0.3V to Min(V + 0.3V, 6V) Lead Temperature (Soldering, 10 sec) ...................300C OUT CC Operating Temperature Range LTC2640C ................................................ 0C to 70C LTC2640I ............................................. 40C to 85C LTC2640H .......................................... 40C to 125C PIN CONFIGURATION LTC2640-Z LTC2640-M TOP VIEW TOP VIEW CS/LD 1 8 CLR CS/LD 1 8 REF SEL SCK 2 7 V SCK 2 7 V OUT OUT SDI 3 6 REF SDI 3 6 REF GND 4 5 V GND 4 5 V CC CC TS8 PACKAGE TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 8-LEAD PLASTIC TSOT-23 T = 150C (NOTE 5), = 195C/W T = 150C (NOTE 5), = 195C/W JMAX JA JMAX JA 2640fd 2 For more information www.linear.com/LTC2640