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LTC1458LCG Datasheet(PDF) 1 Page - Linear Technology |
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LTC1458LCG Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LTC1458/LTC1458L Quad 12-Bit Rail-to-Rail Micropower DACs Daisy-Chained Control Outputs The LTC ®1458/LTC1458L are complete single supply, quad rail-to-rail voltage output, 12-bit digital-to-analog converters (DACs) in SO-28 and SSOP-28 packages. They include an output buffer amplifier with variable gain ( ×1 or ×2) and an easy-to-use 3-wire cascadable serial interface. The LTC1458 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 dissipating only 5.5mW (ICC = 1.1mA typ). The LTC1458L has an onboard 1.22V reference and a full- scale output of 2.5V in a ×2 gain configuration. It operates from a single supply of 2.7V to 5.5V dissipating 2.4mW. Excellent DNL, low supply current and a wide range of built-in functions allow these parts to be used in a host of applications when flexibility, power and single supply operation are important. s Quad 12-Bit DAC s Buffered True Rail-to-Rail Voltage Output s Maximum DNL Error: 0.5LSB s 5V Operation, ICC: 1.1mA Typ (LTC1458) s 3V Operation, ICC: 800µA Typ (LTC1458L) s Internal or External Reference Operation s Settling Time: 14 µs to ±0.5LSB s Schmitt Trigger On Clock Input Allows Direct Optocoupler Interface s Power-On Reset and CLR Pin s SSOP-28 Package s 3-Wire Cascadable Serial Interface with 250kHz Update Rate s Low Cost Functional Block Diagram: Quad 12-Bit Rail-to-Rail DAC Differential Nonlinearity vs Input Code s Digital Calibration s Industrial Process Control s Automatic Test Equipment s Low Power Systems 1458 BD01 48-BIT SHIFT REGISTER AND DAC REGISTER CLK DIN 5V (LTC1458) 3V TO 5V (LTC1458L) 2.048V (LTC1458) 1.22V (LTC1458L) REFHI C REFOUT VOUT C VCC REFLO C X1/X2 C X1/X2 D X1/X2 A X1/X2 B REFHI D VOUT D REFLO D REFHI B FROM µP VOUT B REFLO B REFHI A VOUT A REFLO A DOUT CS/LD CLR DAC D DAC C DAC B DAC A 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 1458 G09 512 1536 3072 3584 4095 DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO , LTC and LT are registered trademarks of Linear Technology Corporation. |
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