LTC2662 Datasheet | Analog Devices

FEATURES - Per-Channel Programmable Output Ranges: 300 m A, 200 m A, 100 m A, 50 m A, 25 m A, 12.5 m A, 6.25 m A and 3.125 m A - Flexible 2.85 V to 33 V Supply Voltage - 1 V Dropout Guaranteed - Separate Voltage Supply per Output Channel - Internal Switches to Optional Negative Supply - Full 16-/12-Bit Resolution at All Ranges - Guaranteed Operation - 40°C to +125°C - Precision (10 ppm/°C Max) Internal Reference or External Refer- ence Input - Analog Mux Monitors Voltages and Currents - A/B Toggle via SPI or Dedicated Pin - 1.8 V to 5 V SPI Serial Interface - 5 mm × 5 mm 32-Lead QFN Package APPLICATIONS - Tunable Lasers - Semiconductor Optical Amplifiers - Resistive Heaters - Current Mode Biasing - Proportional Solenoid Drive GENERAL DESCRIPTION The LTC2662 is a family of five-channel, 16-/12-bit current-source digital-to-analog converters, providing five high-pliance current source outputs with guaranteed 1 V dropout at 200 m A. The part supports load voltages of up to 32 V. There are eight current ranges, programmable per channel, with full-scale outputs of up to 300 m A; and the channels can be paralleled to allow for ultrafine adjustments of large currents, or for bined outputs of up to 1.5 A. A dedicated supply pin is provided for every output channel. Each can be operated from 2.85 V to 33 V, and internal switches allow any output to be pulled to the optional negative supply. The LTC2662 includes a precision integrated 1.25 V reference (10 ppm/°C maximum), with the option to use an external reference. The SPI/Microwire-patible 3-wire serial interface operates on logic levels as low as 1.71 V at clock rates up to 50 MHz. FUNCTIONAL BLOCK DIAGRAM Figure 1. Functional Block Diagram Figure 2. Current Noise Density vs. Frequency Rev. B DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other...