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LM129AH
LM129/LM329 6.9V Precision Voltage Reference FEATURES DESCRIPTION n The LM129 temperature compensated 6.9V zener references provide excellent stability over time and temperature, very low dynamic impedance and a wide operating current range. The device achieves low dynamic impedance by incorporating a high gain shunt regulator around the zener. The excellent noise performance of the device is achieved by using a “buried zener” design which eliminates surface noise phenomenon associated with ordinary zeners. To serve a wide variety of applications, the LM129 is available in several temperature coefficient grades and two package styles. A 20mA positive current source application is shown below. n n n Guaranteed 10ppm/°C Temperature Coefficient Guaranteed 1Ω Maximum Dynamic Impedance Guaranteed 20μV Maximum Wideband Noise Wide Operating Current Range 0.6mA to 15mA APPLICATIONS n n n n Transducers A/D and D/A Converters Calibration Standards Instrumentation Reference L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 20mA Positive Current Source Reverse Voltage Change 20V 8 2 – 7 LT1001 3 20k 0.1% 4.3k + REVERSE VOLTAGE CHANGE (mV) 20k 0.1% LM329 6.95V TA = 25°C 174Ω 0.1% 6 4 10k OUT 20mA 129329 TA01 7 6 5 4 3 2 1 0 0 2 4 8 6 REVERSE CURRENT (mA) 10 129329 TA01b 129329fb 1
LINEAR
Linear Technology Corp.
U.S.A
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