← 返回 JSSC 论文列表JSSC 2011第2期Data Converters0.35μmDAC
An Ultrasonic Transducer Interface IC With Integrated Push-Pull 40 Vpp 400 mA Cu
一款集成推挽式40Vpp 400mA电流输出DAC的超声波换能器接口IC，简化系统设计并提升性能。
0.35μm 50V CMOS, 150MHz采样率, 400mA输出电流, 37dB SNDR, 46dB SFDR
电流输出DAC超声波换能器高压集成电路数字模拟转换在线校准
▸集成推挽式电流输出DAC直接驱动压电换能器，无需外部功率放大器
▸采用分段式DAC设计实现快速无毛刺的电源开关
▸通过附加参考DAC和模拟多路复用器实现在线校准，减少信号路径不确定性
Abstract
iplexer
Johan Borg, Student Member , IEEE, and Jonny Johansson , Member , IEEE
Abstract—We present an ultrasonic transducer interface IC
that includes an 8-bit, 40 /86/112/112, 400 mA current output DAC for
arbitrary waveform transducer excitation and a
25 V analog
multiplexer. The IC was fabricated using a 0.35
m, 50 V CMOS
process.
The design eliminates the need for an external power amplifier
as the piezoelectric transducer is driven directly from a segmented
push-pull current output DAC, wh