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AD5770R Datasheet(PDF) 1 Page - Analog Devices |
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AD5770R Datasheet(HTML) 1 Page - Analog Devices |
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1 / 59 page  6-Channel, 14-Bit, Current Output DAC with On-Chip Reference, SPI Interface Data Sheet AD5770R Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2019 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 6-channel, current output DAC 14-bit resolution Programmable output current ranges Channel 0: 0 mA to 300 mA, −60 mA to +300 mA, −60 mA to 0 mA Channel 1: 0 mA to 140 mA, 0 mA to 250 mA Channel 2: 0 mA to 55 mA, 0 mA to 150 mA Channel 3, Channel 4, Channel 5: 0 mA to 45 mA, 0 mA to 100 mA All current sourcing output ranges scale back by up to 0.5× 1.25 V, on-chip voltage reference Integrated precision reference resistor SPI interface Reset function Output current monitor Compliance voltage monitor Die temperature monitor Integrated thermal shutdown 49-ball, 4 mm × 4 mm WLCSP package Operating temperature: −40°C to +105°C APPLICATIONS Photonics control LED driver programmable current source Current mode biasing GENERAL DESCRIPTION The AD5770R is a 6-channel, 14-bit resolution, low noise, programmable current output, digital-to-analog converter (DAC) for photonics control applications. The device incorporates a 1.25 V, on-chip voltage reference, a 2.5 kΩ precision resistor for reference current generation, die temperature, output monitoring functions, fault alarm, and reset functions. The AD5770R contains five 14-bit resolution current sourcing DAC channels and one 14-bit resolution current sourcing and sinking DAC channel. Channel 0 can be configured to sink up to 60 mA and source up to 300 mA. Channel 1 to Channel 5 have multiple programmable output current sourcing ranges set by register access. Each DAC operates with a wide power supply rail from 0.8 V to AVDD − 0.4 V for optimizing power efficiency and thermal power dissipation. The AD5770R operates from a 2.9 V to 5.5 V AVDD supply and is specified over the −40°C to +105°C temperature range. FUNCTIONAL BLOCK DIAGRAM TEMPERATURE SENSOR DAC INPUT REGISTER DAC REGISTER DAC INPUT REGISTER DAC REGISTER DAC INPUT REGISTER DAC REGISTER INTERFACE LOGIC 1.25V REFERENCE CS SCLK SDI SDO ALARM LDAC RESET IREF VREF_IO AVDD DVDD IOVDD IDAC0 IDAC1 IDAC5 PVDDx CDAMP_IDACx PVEE0 AGND DGND AVEE CREF CREG AD5770R 2.5kΩ INTERNAL RESISTOR MUX_OUT REFGND Figure 1. |
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