LTC2672 Series

Five-Channel, Current Output DAC with Internal Reference and SPI

Catalog

Five-Channel, Current Output DAC with Internal Reference and SPI

Part	Mounting Type	Supplier Device Package	Architecture	Output Type	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	INL/DNL (LSB)	Number of Bits	Number of D/A Converters	Operating Temperature [Max]	Operating Temperature [Min]	Settling Time	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Reference Type	Data Interface	Package / Case
Analog Devices LTC2672CUH-16#PBF	Surface Mount	32-QFN (5x5)	Current Source	Current - Unbuffered	2.85 V	5.5 V	0.45 LSB 12 LSB	16	5	70 °C	0 °C	21.1 µs	1.7 V	5.5 V	External Internal	Serial SPI
Analog Devices LTC2672HCB-16#TRPBF	Surface Mount	32-QFN (5x5)	Current Source	Current - Unbuffered	2.85 V	5.5 V	0.45 LSB 12 LSB	16	5	125 °C	-40 °C	200 µs	1.71 V	5.5 V	External Internal	3-Wire Serial SPI
Analog Devices LTC2672CUH-16#TRPBF	Surface Mount	32-LFCSP (5x5)	Current Source	Current - Unbuffered	2.85 V	5.5 V	0.45 LSB 12 LSB	16	5	70 °C	0 °C	21.1 µs	1.7 V	5.5 V	External Internal	Serial SPI	32-WFQFN Exposed Pad CSP
Analog Devices LTC2672HUH-16#TRPBF	Surface Mount	32-LFCSP (5x5)	Current Source	Current - Unbuffered	2.85 V	5.5 V	0.45 LSB 12 LSB	16	5	125 °C	-40 °C	21.1 µs	1.7 V	5.5 V	External Internal	Serial SPI	32-WFQFN Exposed Pad CSP

Catalog

Five-Channel, Current Output DAC with Internal Reference and SPI

Key Features

• 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 VCCoutput 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 referenceInternal VREFtemperature coefficient of 10 ppm/°C maximum (LFCSP) or 2.4 ppm/°C nominal (WLCSP)

• Internal VREFtemperature 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 VCCdigital input and output supply voltage

• 32-lead lead frame chip scale package (LFCSP)

• 36-ball wafer level chip scale package (WLCSP)

Description

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 VCC, 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 asCS/LD, are referred to by the entire pin name or by a single function of the pin.APPLICATIONSTunable lasersSemiconductor optical amplifier biasingResistive heatersCurrent mode biasing