LTC1454 Datasheet | Linear Technology

LTC1454/LTC1454L Dual 12-Bit Rail-to-Rail Micropower DACs Features s s s s s DESCRIPTION The LTC®1454/LTC1454L are plete 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 fullscale 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. s s s s s s U APPLICATIONS s s s s 12-Bit Resolution Buffered True Rail-to-Rail Voltage Output 5V Operation, ICC: 700µA Typ (LTC1454) 3V Operation, ICC: 450µA Typ (LTC1454L) Built-In Reference: 2.048V (LTC1454) 1.220V (LTC1454L) CLR Pin Power-On Reset 16-Lead SO Package 3-Wire Cascadable Serial Interface Maximum DNL Error: 0.5LSB Low Cost Digital Calibration Industrial Process Control Automatic Test Equipment Cellular Telephones , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION Daisy-Chained Outputs Functional Block Diagram: Control Dual 12-Bit Rail-to-Rail DAC LTC1454: 5V LTC1454L: 3V TO 5V 9, 15 VCC LTC1454: 2.048V 10 LTC1454L: 1.22V REFOUT REFHI B 14 0.5 0.4 0.3 DNL ERROR (LSB) + 4 DIN µP 3 CLK 5 CS/LD 6 DOUT 12-BIT DAC B 24-BIT SHIFT REG AND DAC LATCH VOUT B 16 0.2 0.1 0 - 0.1 - 0.2 - 0.3 - 0.4 - 0.5 0 512 1024 1536 2048 2560 3072 3584 4095 CODE 1454 G08 - X1/X2 B 1 REFHI A 11 + 12-BIT DAC A VOUT A 8 - X1/X2 A 7 POWER-ON RESET CLR 2 12 REFLO GND 13 1454...