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DAC9881SRGET Fiches technique(PDF) 1 Page - Texas Instruments |
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DAC9881SRGET Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 39 page DAC9881 1 FEATURES DESCRIPTION APPLICATIONS R FB (1) Control Logic DGND IOV DD AGND AV DD V -S REFH V -F REFH RST RSTSEL USB/BTC GAIN SDI CS SCLK Input Register DAC Latch LDAC V -S REFL V -F REFL Resistor Network DAC NOTE:(1) R =5k forgain=1, W FB R =10k forgain=2. W FB DAC9881 SerialOut Control SDOSEL SDO Power-On Reset PDN V OUT R FB DAC9881 www.ti.com ......................................................................................................................................................... SBAS438A – MAY 2008 – REVISED AUGUST 2008 18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER 234 • 18-Bit Monotonic Over Temperature Range The DAC9881 is an 18-bit, single-channel, voltage-output digital-to-analog converter (DAC). It • Relative Accuracy: ±2LSB Max features 18-bit monotonicity, excellent linearity, very • Low-Noise: 24nV/√Hz low-noise, and fast settling time. The on-chip • Fast Settling: 5µs precision output amplifier allows rail-to-rail output • On-Chip Output Buffer Amplifier with swing to be achieved over the full supply range of 2.7V to 5.5V. Rail-to-Rail Operation • Single Power Supply: +2.7V to +5.5V The device supports a standard SPI serial interface capable of operating with input data clock frequencies • DAC Loading Control up to 50MHz. The DAC9881 requires an external • Selectable Power-On Reset to Zero-Scale or reference voltage to set the output range of the DAC Midscale channel. A programmable power-on reset circuit is • Power-Down Mode also incorporated into the device to ensure that the DAC output powers up at zero-scale or midscale, and • Unipolar Straight Binary or remains there until a valid write command. Twos Complement Input Mode Additionally, the DAC9881 has the capability to • Fast SPI™ Interface with Schmitt-Triggered function in either unipolar straight binary or twos Inputs: up to 50MHz, 1.8V/3V/5V Logic complement mode. The DAC9881 provides • Small Package: QFN-24, 4mm × 4mm low-power operation. To further save energy, power-down mode can be achieved by accessing the PDN pin, thereby reducing the current consumption to • Automatic Test Equipment 25 µA at 5V. Power consumption is 4mW at 5V, reducing to 125 µW in power-down mode. • Precision Instrumentation • Industrial Control The DAC9881 is available in a 4mm × 4mm QFN-24 • Data Acquisition Systems package with a specified temperature range of –40°C to +105°C. 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 SPI, QSPI are trademarks of Motorola, Inc. 3 MICROWIRE is a trademark of National Semiconductor. 4 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008, 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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