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DAC161S997 Datasheet(PDF) 2 Page - Texas Instruments |
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DAC161S997 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 27 page COMA BASE OUT C2 SCLK C3 SDI C1 VD ERRLVL CSB VA COMD 40 µC Sensor SPI IN HART Modulator LDO I n d u s t r i a l 4 - 2 0 m A T r a n s m i t t e r 0-24 mA Loop + - LOOP SUPPLY LOOP RECEIVER 80k IDAC ÐÂ DAC 16 DAC161S997 LOOP+ LOOP- ERRB + - INT SDO NC VD Internal Reference DAC161S997 SNAS621 – JUNE 2013 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. DEVICE INFORMATION Functional Block Diagram 4-20 mA CURRENT LOOP TRANSMITTER The DAC161S997 is a 16-bit DAC realized as a ∑Δ modulator. The DAC’s output is a current pulse train that is filtered by the on-board low pass RC filter. The final output current is a multiplied copy of the filtered modulator output. This architecture ensures an excellent linearity performance, while minimizing power consumption of the device. The DAC161S997 eases the design of robust, precise, long-term stable industrial systems by integrating all precision elements on-chip. Only a few external components are needed to realize a low-power, high-precision industrial 4 - 20 mA transmitter. In case of a fault, or during initial power-up the DAC161S997 will output current in either upper or lower error current band. The choice of band is user selectable via a device pin. The error current value is user programmable via SPI. 2 Copyright © 2013, Texas Instruments Incorporated Product Folder Links: DAC161S997 |
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