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LTC1454L Datasheet(PDF) 1 Page - Linear Technology |
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LTC1454L Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LTC1454/LTC1454L Dual 12-Bit Rail-to-Rail Micropower DACs Daisy-Chained Control Outputs Functional Block Diagram: Dual 12-Bit Rail-to-Rail DAC X1/X2 B X1/X2 A DIN CLK DOUT VCC POWER-ON RESET – + 12-BIT DAC A 12-BIT DAC B REFOUT CS/LD VOUT B REFHI B REFHI A REFLO GND 14 16 1 11 8 7 12 2 6 5 3 4 9, 15 LTC1454: 5V LTC1454L: 3V TO 5V LTC1454: 2.048V LTC1454L: 1.22V 10 13 VOUT A – + CLR 1454 BD02 24-BIT SHIFT REG AND DAC LATCH µP Differential Nonlinearity vs Input Code CODE 0 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 1024 2048 2560 1454 G08 512 1536 3072 3584 4095 FEATURES s 12-Bit Resolution s Buffered True Rail-to-Rail Voltage Output s 5V Operation, ICC: 700µA Typ (LTC1454) s 3V Operation, ICC: 450µA Typ (LTC1454L) s Built-In Reference: 2.048V (LTC1454) 1.220V (LTC1454L) s CLR Pin s Power-On Reset s 16-Lead SO Package s 3-Wire Cascadable Serial Interface s Maximum DNL Error: 0.5LSB s Low Cost The LTC ®1454/LTC1454L are complete single supply, dual rail-to-rail voltage output, 12-bit digital-to-analog converters (DACs) in a 16-lead SO package. They include an output buffer amplifier with variable gain ( ×1 or ×2) and an easy-to-use 3-wire cascadable serial interface. The LTC1454 has an onboard reference of 2.048V and a full-scale output of 4.095V in a ×2 gain configuration. It operates from a single 4.5V to 5.5V supply. The LTC1454L has an onboard 1.22V reference and a full- scale output of 2.5V in a ×2 gain configuration. It operates from a single 2.7V to 5.5V supply. Low power supply current, excellent DNL and small size allow these parts to be used in a host of applications where size, DNL and single supply operation are important. DESCRIPTION APPLICATIONS s Digital Calibration s Industrial Process Control s Automatic Test Equipment s Cellular Telephones , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION |
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