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DAC161P997 Folha de dados(PDF) 10 Page - Texas Instruments |
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DAC161P997 Folha de dados(HTML) 10 Page - Texas Instruments |
10 / 39 page SWIF $ + - CONTROLLER OSC POR VA C3 C2 C1 NC DBACK DIN ERRLVL ERRB ACKB BASE OUT COMD COMA VD LOW COMA 40 80k 15k 15k 15k IREF VA COMD COMD DAC161P997 SNAS515G – JULY 2011 – REVISED DECEMBER 2014 www.ti.com 7 Detailed Description 7.1 Overview The DAC161P997 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 DAC161P997 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 DAC161P997 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 the SWIF link by the Master. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Error Detection and Reporting The user can modify the CONFIG2:(LOOP | CHANNEL | PARITY | FRAME) bits to mask or enable the reporting of any of the detectable fault conditions. The DAC161P997 reports errors by asserting the ERRB signal, and by setting the current sourced by OUT to a value dictated by the state at ERRLVL pin and the contents of the ERR_HIGH and ERR_LOW registers. Once the condition causing the fault is removed the OUT will return to the last valid output level prior to the occurrence of the fault. 10 Submit Documentation Feedback Copyright © 2011–2014, Texas Instruments Incorporated Product Folder Links: DAC161P997 |
Nº de peça semelhante - DAC161P997_15 |
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Descrição semelhante - DAC161P997_15 |
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