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AD5337ARMZ1 Datasheet(PDF) 1 Page - Analog Devices |
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AD5337ARMZ1 Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 2.5 V to 5.5 V, 250 μA, 2-Wire Interface, Dual Voltage Output, 8-/10-/12-Bit DACs AD5337/AD5338/AD5339 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 www.analog.com Fax: 781.461.3113 ©2003–2007 Analog Devices, Inc. All rights reserved. FEATURES AD5337 2 buffered 8-bit DACs in 8-lead MSOP AD5338, AD5338-1 2 buffered 10-bit DACs in 8-lead MSOP AD5339 2 buffered 12-bit DACs in 8-lead MSOP Low power operation: 250 μA @ 3 V, 300 μA @ 5 V 2-wire (I2C-compatible) serial interface 2.5 V to 5.5 V power supply Guaranteed monotonic by design over all codes Power-down to 80 nA @ 3 V, 200 nA @ 5 V 3 power-down modes Double-buffered input logic Output range: 0 V to VREF Power-on reset to 0 V Simultaneous update of outputs (LDAC function) Software clear facility Data readback facility On-chip rail-to-rail output buffer amplifiers Temperature range: −40°C to +105°C APPLICATIONS Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators Industrial process control GENERAL DESCRIPTION The AD5337/AD5338/AD5339 are dual 8-, 10-, and 12-bit buffered voltage output DACs, respectively. Each part is housed in an 8-lead MSOP package and operates from a single 2.5 V to 5.5 V supply, consuming 250 μA at 3 V. On-chip output amplifiers allow rail-to-rail output swing with a slew rate of 0.7 V/μs. A 2- wire serial interface operates at clock rates up to 400 kHz. This interface is SMBus compatible at VDD < 3.6 V. Multiple devices can be placed on the same bus. The references for the two DACs are derived from one reference pin. The outputs of all DACs can be updated simultaneously using the software LDAC function. The parts incorporate a power-on reset circuit to ensure that the DAC outputs power up to 0 V and remain there until a valid write to the device takes place. A software clear function resets all input and DAC registers to 0 V. A power-down feature reduces the current consumption of the devices to 200 nA @ 5 V (80 nA @ 3 V). The low power consumption of these parts in normal operation makes them ideally suited to portable battery-operated equip- ment. The power consumption is typically 1.5 mW at 5 V and 0.75 mW at 3 V, reducing to 1 μW in power-down mode. FUNCTIONAL BLOCK DIAGRAM SCL BUFFER BUFFER LDAC A0 SDA GND INTERFACE LOGIC INPUT REGISTER INPUT REGISTER DAC REGISTER DAC REGISTER STRING DAC A STRING DAC B VOUTA VOUTB POWER-DOWN LOGIC AD5337/AD5338/AD5339 POWER-ON RESET REFIN VDD Figure 1. |
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