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AD5429 Dataheets PDF



Part Number AD5429
Manufacturers Analog Devices
Logo Analog Devices
Description Multiplying DACs
Datasheet AD5429 DatasheetAD5429 Datasheet (PDF)

Dual 8-,10-,12-Bit High Bandwidth Multiplying DACs with Serial Interface AD5429/AD5439/AD5449 FEATURES 10 MHz multiplying bandwidth 50 MHz serial interface 2.5 V to 5.5 V supply operation ±10 V reference input Pin compatible 8-, 10-, and 12-bit DACs Extended temperature range: −40°C to +125°C 16-lead TSSOP package Guaranteed monotonic Power-on reset Daisy-chain mode Readback function 0.5 µA typical current consumption FUNCTIONAL BLOCK DIAGRAM VREFA AD5429/AD5439/AD5449 VDD SYNC SCLK SDIN SDO C.

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Dual 8-,10-,12-Bit High Bandwidth Multiplying DACs with Serial Interface AD5429/AD5439/AD5449 FEATURES 10 MHz multiplying bandwidth 50 MHz serial interface 2.5 V to 5.5 V supply operation ±10 V reference input Pin compatible 8-, 10-, and 12-bit DACs Extended temperature range: −40°C to +125°C 16-lead TSSOP package Guaranteed monotonic Power-on reset Daisy-chain mode Readback function 0.5 µA typical current consumption FUNCTIONAL BLOCK DIAGRAM VREFA AD5429/AD5439/AD5449 VDD SYNC SCLK SDIN SDO CLR INPUT REGISTER LDAC DAC REGISTER SHIFT REGISTER INPUT REGISTER DAC REGISTER 8-/10-/12-BIT R-2R DAC A RFB R RFBA IOUT1A IOUT2A POWER-ON RESET 8-/10-/12-BIT R-2R DAC B IOUT1B IOUT2B RFBB 04464-0-001 RFB R LDAC VREFB Figure 1. APPLICATIONS Portable battery-powered applications Waveform generators Analog processing Instrumentation applications Programmable amplifiers and attenuators Digitally controlled calibration Programmable filters and oscillators Composite video Ultrasound Gain, offset, and voltage trimming GENERAL DESCRIPTION The AD5429/AD5439/AD54491 are CMOS 8-, 10-, and 12-bit dual-channel current output digital-to-analog converters, respectively. These devices operate from a 2.5 V to 5.5 V power supply, making them suited to battery-powered and other applications. The applied external reference input voltage (VREF) determines the full-scale output current. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external current-to-voltage precision amplifier. These DACs utilize a double-buffered, 3-wire serial interface that is compatible with SPI®, QSPI™, MICROWIRE™, and most DSP interface standards. In addition, a serial data out pin (SDO) allows daisy-chaining when multiple packages are used. Data readback allows the user to read the contents of the DAC register via the SDO pin. On power-up, the internal shift register and latches are filled with zeros and the DAC outputs are at zero scale. As a result of manufacture on a CMOS submicron process, these parts offer excellent 4-quadrant multiplication characteristics, with large signal multiplying bandwidths of 10 MHz. The AD5429/AD5439/AD5449 DAC are available in 16-lead TSSOP packages. 1 US Patent Number 5,689,257. Rev. 0 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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. AD5429/AD5439/AD5449 TABLE OF CONTENTS Specifications..........


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