TI TIDA－01535隔离的超紧凑模拟输出模块参考设计

TI公司的TIDA-01535是隔离的超紧凑模拟输出模块参考设计,采用高度集成DAC8771 DAC来提供电流和电压输出.高度集成的DAC8771和LM25180初级边调整反馈转换器一起导致紧凑绝缘的设计,板尺寸为52-mm × 40-mm,元件最大高度为4mm.此外,设计的外电路提供EMI和EMC的瞬态保护.模拟输出设计符合标准工业电源电压12V到42V,系统具有16位电压(±12 V)或电流输出(±24 mA),总可调误差(TUE)小于满刻度(FSR)的0.1%.采用隔离电源能保持电源和数据输入和输出功能隔离.参考设计采用自适应功率管理,以最小化DAC8771的功率和热损耗,由于降低自发热使系统有更小的包装,从而改善了精度.参考设计主要用在工厂自动化和控制,马达驱动,建筑物自动化和电网基础设备如保护继电器,DCIO模块.本文介绍了参考设计TIDA-01535主要特性,框图和参考设计TIDA-01535主要指标以及电路图.
Reference design for power-isolated, ultra-compact analog output module
This single-channel, power-isolated, analog output module reference design delivers current and voltage outputs using the highly-integrated DAC8771 digital-to analog converter (DAC). The high integration of the DAC8771 coupled with the LM25180 primary-side regulated flyback converter lead to a compact, isolated design with 52-mm × 40-mm board dimensions and a maximum component height of 4 mm. Additionally, the design features external circuitry to provide transient protection for electromagnetic interference (EMI) and electromagnetic compatibility (EMC).
This analog output design accepts a standard industrial supply voltage of 12 V to 42 V. The system features a 16-bit voltage (±12 V) or current output (±24 mA), with a total unadjusted error (TUE) of less than 0.1% full-scale range (FSR). The use of an isolated power supply maintains the functional isolation from the power and data inputs to the output. The included external circuitry provides protection against transient electromagnetic interference (EMI). The system uses adaptive power management to minimize power and heat dissipation in the DAC8771, which improves accuracy by reducing self-heating and enabling smaller system enclosures.
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