LTC2632 Dual 12-/10-/8-Bit SPI V DACs with OUT 10ppm/C Reference FEATURES DESCRIPTION n Integrated Precision Reference The LTC 2632 is a family of dual 12-, 10-, and 8-bit 2.5V Full-Scale 10ppm/C (LTC2632-L) voltage-output DACs with an integrated, high-accuracy, 4.096V Full-Scale 10ppm/C (LTC2632-H) low-drift reference in an 8-lead TSOT-23 package. It has n Maximum INL Error: 1.5LSB (LTC2632A-12) rail-to-rail output buffers and is guaranteed monotonic. n Low Noise: 0.75mV 0.1Hz to 200kHz P-P The LTC2632-L has a full-scale output of 2.5V, and oper- n Guaranteed Monotonic 40C to 125C Automotive ates from a single 2.7V to 5.5V supply. The LTC2632-H Temperature Range has a full-scale output of 4.096V, and operates from a n Selectable Internal or External Reference 4.5V to 5.5V supply. Each DAC can also operate with an n 2.7V to 5.5V Supply Range (LTC2632-L) external reference, which sets the full-scale output to the n Low Power Operation 0.4mA at 3V external reference voltage. n Power-On-Reset to Zero-Scale/Mid-Scale n These DACs communicate via a simple SPI/MICROWIRE Double-Buffered Data Latches n compatible 3-wire serial interface which operates at clock 8-Lead ThinSOT Package rates up to 50MHz. The LTC2632 incorporates a power-on reset circuit. Options are available for reset to zero-scale APPLICATIONS or reset to mid-scale in internal reference mode, or reset n Mobile Communications to mid-scale in external reference mode after power-up. n Process Control and Industrial Automation All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 5396245, 5859606, 6891433, and 6937178. n Automatic Test Equipment n Portable Equipment n Automotive BLOCK DIAGRAM REF INTERNAL GND SWITCH Integral Nonlinearity (LTC2632A-LZ12) REFERENCE 2 V REF V = 3V CC V CC INTERNAL REF. 1 V V OUTA OUTB DAC A DAC B 0 SDI CS/LD 1 CONTROL DECODE LOGIC SCK 2 POWER-ON 0 1024 2048 3072 4095 32-BIT SHIFT REGISTER RESET CODE 2632 TA01 2632 BD Rev. C 1 Document Feedback For more information www.analog.com REGISTER REGISTER REGISTER REGISTER INL (LSB)LTC2632 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) TOP VIEW Supply Voltage (V ) ................................... 0.3V to 6V CC SCK 1 8 SDI SCK, SDI ...................................................... 0.3V to 6V CS/LD 2 7 V CC REF 3 6 V CS/LD (Note 10) ...............0.3V to Min (V + 0.3V, 6V) OUTB CC GND 4 5 V OUTA V , V ...................0.3V to Min (V + 0.3V, 6V) OUTA OUTB CC TS8 PACKAGE REF ..................................0.3V to Min (V + 0.3V, 6V) CC 8-LEAD PLASTIC TSOT-23 T = 150C (NOTE 6), = 195C/W Operating Temperature Range JMAX JA LTC2632C ................................................ 0C to 70C LTC2632H .......................................... 40C to 125C Maximum Junction Temperature .......................... 150C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C ORDER INFORMATION LTC2632 A C TS8 L Z 12 TRM PBF LEAD FREE DESIGNATOR TAPE AND REEL TR = 2,500-Piece Tape and Reel TRM = 500-Piece Tape and Reel RESOLUTION 12 = 12-Bit 10 = 10-Bit 8 = 8-Bit POWER-ON RESET I = Reset to Mid-Scale in Internal Reference Mode X = Reset to Mid-Scale in External Reference Mode (2632-L Only) Z = Reset to Zero-Scale in Internal Reference Mode FULL-SCALE VOLTAGE, INTERNAL REFERENCE MODE L = 2.5V H = 4.096V PACKAGE TYPE TS8 = 8-Lead Plastic TSOT-23 TEMPERATURE GRADE C = Commercial Temperature Range (0C to 70C) H = Automotive Temperature Range (40C to 125C) ELECTRICAL GRADE (OPTIONAL) A = 1.5LSB Maximum INL (12-Bit) PRODUCT PART NUMBER Contact the factory for parts specified with wider operating temperature ranges. Contact the factory for information on lead based finish parts. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. C 2 For more information www.analog.com