LTC2672 Datasheet

• Per channel programmable output current ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA
• Flexible 2.1 V to V_CC output supply voltages
• Flexible single- or dual-supply operation
• 0.6 V maximum dropout voltage guaranteed
• Separate voltage supply per output channel
• Internal switches to optional negative supply
• Full 12-bit and 16-bit resolution at all ranges
• Guaranteed operation −40°C to 125°C (H-grade)
• Precision internal reference or external reference
  • Internal V_REF temperature coefficient of 10 ppm/°C maximum (LFCSP) or 2.4 ppm/°C nominal (WLCSP)
• Analog multiplexer monitors voltages and currents
• A/B toggle via SPI or dedicated pin
• 1.71 V to V_CC digital input and output supply voltage
• 32-lead lead frame chip scale package (LFCSP)
• 36-ball wafer level chip scale package (WLCSP)

• Tunable lasers
• Semiconductor optical amplifier biasing
• Resistive heaters
• Current mode biasing

The LTC2672 is a family of five-channel, 12-/16-bit current source, digital-to-analog converters (DACs) that provide five high compliance, current source outputs with guaranteed 0.6 V dropout at 200 mA. There are eight current ranges that are programmable per channel with full-scale outputs of up to 300 mA. The channels can be paralleled to allow either ultrafine adjustments of large currents or combined outputs of up to 1.5 A. A dedicated supply pin is provided for each output channel. Each channel can be operated from 2.1 V to V_CC, and internal switches allow any output to be pulled to the optional negative supply. The LTC2672 includes a precision integrated 1.25 V reference (10 ppm/°C maximum (LFCSP) or 2.4 ppm/°C nominal (WLCSP)), with the option to use an external reference. The serial peripheral interface (SPI)-compatible, 3‑wire serial interface operates on logic levels as low as 1.71 V and at clock rates as high as 50 MHz.

Note that throughout this data sheet, multifunction pins, such as CS/LD, are referred to by the entire pin name or by a single function of the pin.