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LTC2662 Datasheet(PDF) 1 Page - Analog Devices |
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LTC2662 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 28 page  LTC2662 1 Rev 0 For more information www.analog.com BLOCK DIAGRAM FEATURES DESCRIPTION Five-Channel, 300mA Current-Source- Output 16-Bit SoftSpan DACs The LTC®2662 is a family of five-channel, 16-bit current- source digital-to-analog converters, providing five high- compliance current source outputs with guaranteed 1V dropout at 200mA. The part supports load voltages of up to 32V. There are eight current ranges, programmable per channel, with full-scale outputs of up to 300mA; and the channels can be paralleled to allow for ultrafine adjust- ments of large currents, or for combined outputs of up to 1.5A. A dedicated supply pin is provided for every output chan- nel. Each can be operated from 2.85V to 33V, and internal switches allow any output to be pulled to the optional negative supply. The LTC2662 includes a precision integrated 1.25V ref- erence (10ppm/°C maximum), with the option to use an external reference. The SPI/Microwire-compatible 3-wire serial interface operates on logic levels as low as 1.71V at clock rates up to 50MHz. All registered trademarks and trademarks are the property of their respective owners. Current Noise Density vs Frequency APPLICATIONS n Per-Channel Programmable Output Ranges: 300mA, 200mA, 100mA, 50mA, 25mA, 12.5mA,6.25mA and 3.125mA n Flexible 2.85V to 33V Supply Voltage n 1V Dropout Guaranteed n Separate Voltage Supply per Output Channel n Internal Switches to Optional Negative Supply n Full 16-Bit Resolution at All Ranges n Guaranteed Operation –40°C to 125°C n Precision (10ppm/°C Max) Internal Reference or External Reference Input n Analog Mux Monitors Voltages and Currents n A/B Toggle via SPI or Dedicated Pin n 1.8V to 5V SPI Serial Interface n 5mm × 5mm 32-Lead QFN Package n Tunable Lasers n Semiconductor Optical Amplifiers n Resistive Heaters n Current Mode Biasing n Proportional Solenoid Drive 24 25 23 22 20 19 18 16 17 30 29 6 5 3 4 7 31 2 28 27 10 12 9 11 13 21 DAC0 VDD0 OUT0 FULL SCALE ADJUST INTERNAL REFERENCE ANALOG MUX SPAN0 SERIAL INTERFACE VDD1 OUT1 VDD2 OUT2 VDD3 OUT3 VDD4 OUT4 2662 TA01a FAULT FAULT DETECT CS/LD IOVCC SCK SDI SDO LDAC CLR TGP MUX V+ V– 15, 26 REF FSADJ REFLO REFCOMP VCC GND 1, 8, 14, 32 DAC1 SPAN1 DAC2 SPAN2 DAC3 SPAN3 DAC4 SPAN4 V– V– V– V– V– CURRENT NOISE IN RLOAD ( = 4Ω) (CL PARALLEL TO RLOAD) CL = 10µF AND CL=1µF TRACES CALCULATED FROM CL=0 MEASUREMENTS CL=0 CL=1µF CL=10µF FREQUENCY (Hz) 10 100 1k 10k 100k 1M 10M 0 10 20 30 40 50 60 70 80 2662 TA01b Document Feedback |
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