电子与封装
電子與封裝
전자여봉장
EIECTRONICS AND PACKAGING
2014年
10期
11-15
,共5页
数字电位计%EEPROM%I2C总线
數字電位計%EEPROM%I2C總線
수자전위계%EEPROM%I2C총선
digitally controlled potentiometer%EEPROM%I2C
设计了一种基于嵌入式EEPROM工艺的双电源数字电位计。通过两线的I2C总线来控制电路内部EEPROM单元,调节数字电位计的输出电阻或电压。电路采用正负电源供电,同时集成了两路256个抽头可变电位计输出。由于内部集成了EEPROM单元,当电路突然掉电后依然保存抽头设置信息,重新上电后,自动恢复到掉电前电阻抽头的设定位置。该电路采用SMIC 0.18μm EEPROM工艺设计,版图面积为6.76 mm2,采用Hsim对整个电路进行仿真。仿真和测试结果表明,该电位计电路的整体非线性小于±1 LSB,级间非线性小于±0.5 LSB,输出电阻温度系数小于±100×10-6/℃, EEPROM上电恢复时间小于5 ms,可广泛应用于控制系统、参数调整和信号处理领域。
設計瞭一種基于嵌入式EEPROM工藝的雙電源數字電位計。通過兩線的I2C總線來控製電路內部EEPROM單元,調節數字電位計的輸齣電阻或電壓。電路採用正負電源供電,同時集成瞭兩路256箇抽頭可變電位計輸齣。由于內部集成瞭EEPROM單元,噹電路突然掉電後依然保存抽頭設置信息,重新上電後,自動恢複到掉電前電阻抽頭的設定位置。該電路採用SMIC 0.18μm EEPROM工藝設計,版圖麵積為6.76 mm2,採用Hsim對整箇電路進行倣真。倣真和測試結果錶明,該電位計電路的整體非線性小于±1 LSB,級間非線性小于±0.5 LSB,輸齣電阻溫度繫數小于±100×10-6/℃, EEPROM上電恢複時間小于5 ms,可廣汎應用于控製繫統、參數調整和信號處理領域。
설계료일충기우감입식EEPROM공예적쌍전원수자전위계。통과량선적I2C총선래공제전로내부EEPROM단원,조절수자전위계적수출전조혹전압。전로채용정부전원공전,동시집성료량로256개추두가변전위계수출。유우내부집성료EEPROM단원,당전로돌연도전후의연보존추두설치신식,중신상전후,자동회복도도전전전조추두적설정위치。해전로채용SMIC 0.18μm EEPROM공예설계,판도면적위6.76 mm2,채용Hsim대정개전로진행방진。방진화측시결과표명,해전위계전로적정체비선성소우±1 LSB,급간비선성소우±0.5 LSB,수출전조온도계수소우±100×10-6/℃, EEPROM상전회복시간소우5 ms,가엄범응용우공제계통、삼수조정화신호처리영역。
The paper introduces a design of dual supply digitally controlled potentiometer based on EEPROM. The EEPROM cells were controlled through two wire I2C bus,can adjust the digitally controlled potentiometer resistor or voltage output. The potentiometer has dual supply and 256 resistor taps. The potentiometer has non-volatile EEPROM storage of wiper position, so when the device is powered down suddendly, the last value stored in the non-volatile EEPROM memory. When power is restored, the contents of the non-volatile EEPROM memory are recalled and loaded into the corresponding latchs to set wipers to their initial positions. The circuit uses 0.18 μm EEPROM technology, and layout is 6.76 mm2. Hsim is used for simulating. The simulate and test results show that: the integral non-linearity of the circuit is less than ± 1 LSB, the diffenrential non-linearity is less than ±0.5 LSB, the temperature coefficient of output resistors is less than ±100×10-6/℃,the power-on delay is less than 5 ms. This digitally controlled potentiometer can be used in wide variety of applications including control, parameter adjustments, and signal processing.