LTZ1000 ‘Buried Zener’ Voltage Reference
Bandgap voltage references are a great and easy to use accurate reference when you need them. But what about when a reference’s stability over time and temperature is more important than its absolute output voltage? One solution can be found inside of the famous HP 3458A voltmeter and its Linear Technology LTZ1000 voltage reference. Let’s take a closer look at this unique "buried zener" reference.