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AD5326ARUZ1 Folha de dados(PDF) 1 Page - Analog Devices |
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AD5326ARUZ1 Folha de dados(HTML) 1 Page - Analog Devices |
1 / 24 page 2.5 V to 5.5 V, 400 μA, 2-Wire Interface, Quad Voltage Output, 8-/10-/12-Bit DACs AD5306/AD5316/AD5326 Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. 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 © 2005 Analog Devices, Inc. All rights reserved. FEATURES AD5306: 4 buffered, 8-bit DACs in 16-lead TSSOP A version: ±1 LSB INL; B version: ±0.625 LSB INL AD5316: 4 buffered, 10-bit DACs in 16-lead TSSOP A version: ±4 LSB INL; B version: ±2.5 LSB INL AD5326: 4 buffered, 12-bit DACs in 16-lead TSSOP A version: ±16 LSB INL; B version: ±10 LSB INL Low power operation: 400 μA @ 3 V, 500 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 90 nA @ 3 V, 300 nA @ 5 V (PD pin or bit) Double-buffered input logic Buffered/unbuffered reference input options Output range: 0 V to VREF or 0 V to 2 VREF Power-on reset to 0 V Simultaneous update of outputs (LDAC pin) 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 1 Protected by U.S. Patent Numbers 5,969,657 and 5,684,481. FUNCTIONAL BLOCK DIAGRAM SCL INTERFACE LOGIC INPUT REGISTER DAC REGISTER INPUT REGISTER DAC REGISTER VOUTA STRING DAC A STRING DAC B VDD VREFB VREFA VREFC VREFD VOUTB POWER-ON RESET POWER-DOWN LOGIC LDAC A1 A0 LDAC SDA GND PD AD5306/AD5316/AD5326 BUFFER BUFFER INPUT REGISTER DAC REGISTER INPUT REGISTER DAC REGISTER VOUTC STRING DAC C STRING DAC D VOUTD BUFFER BUFFER Figure 1. GENERAL DESCRIPTION The AD5306/AD5316/AD53261 are quad 8-/10-/12-bit buffered voltage output DACs in 16-lead TSSOP packages that operate from a single 2.5 V to 5.5 V supply, consuming 500 μA at 3 V. Their on-chip output amplifiers allow rail-to-rail output swing with a slew rate of 0.7 V/μs. A 2-wire serial interface, which operates at clock rates up to 400 kHz, is used. This interface is SMBus-compatible at VDD < 3.6 V. Multiple devices can be placed on the same bus. Each DAC has a separate reference input that can be configured as buffered or unbuffered. The outputs of all DACs can be updated simultaneously using the asynchronous LDAC input. The parts incorporate a power-on reset circuit that ensures the DAC outputs power up to 0 V and remain there until a valid write to the device takes place. The software clear function clears all DACs to 0 V. The parts contain a power-down feature that reduces the current consumption of the device to 300 nA @ 5 V (90 nA @ 3 V). All three parts have the same pinout, which allows users to select the amount of resolution appropriate for their application without redesigning their circuit board. |
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