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DAC8218 Datasheet(PDF) 1 Page - Texas Instruments |
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DAC8218 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 64 page  DAC8218 DAC8218 An og al Monit r o ToDAC-0,DAC-1, DAC-2,DAC-3 ToDAC-0,DAC-1, DAC-2,DAC-3 ToDAC-4,DAC-5,DAC-6,DAC-7 DAC8218 OFFSET-B AGND-B V -7 OUT V MON OFFSET-A AGND-A REF-B Reference BufferB InternalTrimming Zero/Gain;INL Reference BufferA OFFSET DACA OFFSET DACB DAC-0 Latch-0 Power-Up/ Power-Down Control (SameFunctionBlocks forAllChannels) REF-A LDAC RST RSTSEL LDAC CLR USB/BTC AIN-0 AIN-1 GPIO-0 GPIO-1 GPIO-2 SDO SDI CS SCLK WAKEUP IOV DD DGND DV DD AV DD AV SS DGND DV DD AV DD AV SS V -0 OUT V -7 OUT AIN-0 AIN-1 RefBufferA RefBufferB OFFSET-B Command Registers InputData Register0 Correction Engine (WhenCorrectionEngineDisabled) DAC-0 Data UserCalibration: ZeroRegister0 GainRegsiter0 V -0 OUT DAC8218 www.ti.com SBAS460A – MAY 2009 – REVISED DECEMBER 2009 Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER Check for Samples: DAC8218 1 FEATURES DESCRIPTION 2345 • Bipolar Output: ±2V to ±16.5V The DAC8218 is a low-power, octal, 14-bit digital-to-analog converter (DAC). With a 5V • Unipolar Output: 0V to +33V reference, the output can either be a bipolar ±15V • 14-Bit Resolution voltage when operating from dual ±15.5V (or higher) • Low Power: 14.4mW/Ch (Bipolar Supply) power supplies, or a unipolar 0V to +30V voltage • Relative Accuracy: 1 LSB Max when operating from a +30.5V (or higher) power supply. With a 5.5V reference, the output can either • Low Zero/Full-Scale Error be a bipolar ±16.5V voltage when operating from dual – Before User Calibration: ±2.5 LSB Max ±17V (or higher) power supplies, or a unipolar 0V to – After User Calibration: ±1 LSB +33V voltage when operating from a +33.5V (or higher) power supply. This DAC provides low-power • Flexible System Calibration operation, good linearity, and low glitch over the • Low Glitch: 4nV-s specified temperature range of –40°C to +105°C. This • Settling Time: 15 μs device is trimmed in manufacturing and has very low zero-code and gain error. In addition, system level • Channel Monitor Output calibration can be performed to achieve ±1 LSB • Programmable Gain: x4/x6 bipolar zero/full-scale error with bipolar supplies, or • Programmable Offset ±1 LSB zero code/full-scale error with a unipolar supply, over the entire signal chain. The output range • SPI™: Up to 50MHz, 1.8V/3V/5V Logic can be offset by using the DAC offset register. • Schmitt Trigger Inputs The DAC8218 features a standard, high-speed serial • Daisy-Chain with Sleep Mode Enhancement peripheral interface (SPI) that operates at up to • Packages: QFN-48 (7x7mm), TQFP-64 50MHz and is 1.8V, 3V, and 5V logic compatible, to (10x10mm) communicate with a DSP or microprocessor. The input data of the device are double-buffered. An APPLICATIONS asynchronous load input (LDAC) transfers data from • Automatic Test Equipment the DAC data register to the DAC latch. The asynchronous CLR input sets the output of all eight • PLC and Industrial Process Control DACs to AGND. The VMON pin is a monitor output • Communications that connects to the individual analog outputs, the offset DAC, the reference buffer outputs, and two external inputs through a multiplexer (mux). The DAC8218 is pin-to-pin and function-compatible with the DAC8718 (16-bit) and the DAC7718 (12-bit). 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 DSP is a trademark of Texas Instruments. 3 SPI, QSPI are trademarks of Motorola Inc. 4 Microwire is a trademark of National Semiconductor. 5 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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