高速单片12位D／A转换器电路设计

The Design of a High-Speed Monolithic 12-Bit Digital-to- Analog Converter

本文描述了一种全扩散型高速单片１２位Ｄ／Ａ转换器集成电路ＣＤＡ６０１２的设计。该Ｄ／Ａ转换器集成电路由于采用了一种独特的分段式及主－从梯形网络的设计方法，在不需要精密的薄膜电阻及激光修正技术的情况下达到了１２位的分辨率。它提供了高达１３位的单调性和微分线性度，全量程的稳定时间为２５０ｎｓ，电源电压为±１８Ｖ范围，在电源电压为＋５Ｖ和－１５Ｖ时功耗可低至２３０ｍＷ左右。

Design of a very high-speed monolitnic 12-bit D-A converter IC with all diffusion process is describe in thepaper.Using a unique sectional design technique combined with master-slave ladder networks,the converter IC achieves12-bit resolution without laser-trimmed precise thin-film resistors.It provlties up to 13-bit monotonicity and differentiallinearity.A settling time of 250ns in full scale has been obtained. with power supply in the range of±18V. At+5V and-15V power supply. the power consumption is down to 230mW.