ADI ADFS5758单路16位电流电压输出DAC解决方案

ADI公司的ADFS5758是单路16位电流电压输出数模转换器(DAC),工作电压从AVSS的-33V到AVDD1的+33V,两轨间最大工作电压为60V,片上的动态功率控制(DPC)最小化封装的功率损耗,CHART引脚使得HART®信号能耦合到电流输出.器件采用4线SPI,时钟速率高达50MHz,和标准的SPI, QSPI™, MICROWIRE™, DSP和微控制器接口标准兼容,接口还具有可选择的SPI循环冗余检查(CRC)和视窗计时器.和以前的产品相比,器件提供改善诊断特性.电流输出范围0 mA- 20 mA, 4 mA- 20 mA, 0 mA - 24 mA, ±20 mA, ±24 mA, 以及−1 mA - +22 mA,电压输出范围0 V - 5 V, 0 V - 10 V, ±5 V和±10 V.工作温度−40C到 +105C,32引脚5x5mm LFCSP封装.主要用在过程控制,激励器控制,通路绝缘模拟输出,可编逻辑控制器(PLC)和分布控制系统(DCS),HART网络连接.本文介绍了ADFS5758产品亮点和主要特性,功能框图, ADFS5758和ADP1031模块案例图以及评估板EVAL-ADFS5758SDZ主要特性,电路图和材料清单.

 The ADFS5758 is a single-channel, 16-bit, current/voltage output DAC. The device is functional safety approved for unipolar current output and is a fully compliant item with a systematic capability of SC3, which can be used in safety-related applications up to SIL 2, according to IEC 61508. This arrangement allows a single ADFS5758 to be used to achieve SIL 2 for a nonredundant configuration. The safe state for the ADFS5758 is open circuit/high impedance.

The ADFS5758 is a single-channel, voltage and current output digital-to-analog converter (DAC) that operates with a power supply range from −33 V minimum on AVSS to +33 V maximum on AVDD1 with a maximum operating voltage between the two rails of 60 V. On-chip dynamic power control (DPC) minimizes package power dissipation, which is achieved by regulating the supply voltage (VDPC+) to the VIOUT output driver circuitry from 4.95 V to 27 V using a buck dc-to-dc converter, optimized for minimum on-chip power dissipation. The CHART pin enables a HART® signal to be coupled onto the current output.

The device uses a ver...