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LTC2640AITS8-LM12 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2640AITS8-LM12 Datasheet(HTML) 1 Page - Linear Technology |
1 / 24 page LTC2640 1 2640fb BLOCK DIAGRAM FEATURES APPLICATIONS DESCRIPTION Single 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference The LTC®2640 is a family of 12-, 10-, and 8-bit voltage- output DACs with an integrated, high-accuracy, low-drift reference in an 8-lead TSOT-23 package. It has a rail-to-rail output buffer that is guaranteed monotonic. The LTC2640-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2640-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. A 10ppm/°C reference output is available at the REF pin. Each DAC can also operate in External Reference mode, in which a voltage supplied to the REF pin sets the full- scale output. The LTC2640 DACs use a SPI/MICROWIRE™ compatible 3-wire serial interface which operates at clock rates up to 50MHz. The LTC2640 incorporates a power-on reset circuit. Op- tions are available for Reset to Zero-Scale or Reset to Mid-Scale after power-up. Integral Nonlinearity (LTC2640A-LZ12) n Integrated Precision Reference 2.5V Full-Scale 10ppm/°C (LTC2640-L) 4.096V Full-Scale 10ppm/°C (LTC2640-H) n Maximum INL Error: 1LSB (LTC2640A-12) n Bidirectional Reference: Input or 10ppm/°C Output n Low Noise (0.7mVpp, 0.1Hz to 200kHz) n Guaranteed Monotonic Over Temperature n 2.7V to 5.5V Supply Range (LTC2640-L) n Low Power Operation: 180μA at 3V n Power Down to 1.8μA Maximum (C and I Grades) n Asynchronous DAC Clear Pin (LTC2640-Z) n Power-On Reset to Zero or Mid-Scale options n Double-Buffered Data Latches n Guaranteed Operation from –40°C to 125°C (H-Grade) n 8-Lead TSOT-23 (ThinSOT™) Package n Mobile Communications n Process Control and Industrial Automation n Automatic Test Equipment n Portable Equipment n Automotive n Optical Networking L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5396245, 5859606, 6891433, 6937178 and 7414561. (LTC2640-Z) DAC REGISTER RESISTOR DIVIDER INTERNAL REFERENCE INPUT REGISTER 24-BIT SHIFT REGISTER DAC VOUT SWITCH CONTROL DECODE LOGIC CS/LD VCC REF GND CLR DACREF 2640 TA01 SCK SDI CODE 0 0 0.5 4095 2640 TA01b –0.5 –1.0 1024 2048 3072 1.0 VCC = 3V VFS = 2.5V |
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