Datasheet LTZ1000, LTZ1000A (Analog Devices) - 3

LTZ1000/LTZ1000A
Typical perForMance characTerisTics Zener Voltage vs Current Zener Voltage Noise Spectrum Zener Noise
100 500 IZ = 4mA 90 450 80 400 ZENER ALONE /√Hz) V/D) 70 350 60 300 50 250 IZ = 0.5mA TAGE CHANGE (mV) ZENER CURRENT = 0.5mA 40 TAGE NOISE (nV 200 TAGE NOISE (2µ 30 150 ZENER VOL 20 ZENER WITH KELVIN ZENER VOL 100 ZENER CURRENT = 4mA ZENER VOL 10 SENSED Q1 50 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0.1 1 10 100 0 10 20 30 40 50 60 ZENER CURRENT (mA) FREQUENCY (Hz) TIME (SECONDS) 1000 G01 1000 G02 1000 G03
Die Temperature Rise vs Heater Power Die Temperature vs Time Die Temperature Rise vs Time
0.8 125 125 LTZ1000A LTZ1000 0.7 100 HEATER POWER = 0.3W 100 0.6 0.5 LTZ1000 75 75 HEATER POWER = 0.7W 0.4 TURE RISE (°C) TURE RISE (°C) HEATER POWER = 0.2W HEATER POWER = 0.5W TER POWER (W) 0.3 50 50 HEA 0.2 LTZ1000A DIE TEMPERA 25 HEATER POWER = 0.1W DIE TEMPERA 25 0.1 HEATER POWER = 0.3W 0 0 0 25 35 45 55 65 75 85 95 105 115 125 0.1 1 10 100 1000 0.1 1 10 100 1000 DIE TEMPERATURE ABOVE AMBIENT (°C) TIME (SECONDS) TIME (SECONDS) 1000 G06 1000 G05 1000 G04
pin FuncTions Pin 1:
Heater Positive. Must have a higher positive value
Pin 5:
Temperature Compensating Transistor Collector. than Pin 2 and Pin 4.
Pin 6:
Temperature Sensing Transistor Base. If the base
Pin 2:
Heater Negative. Must have a higher positive value emitter junction is zenered (about 7V) the transistor will than Pin 4. Must have equal or lower potential than Pin 1. suffer permanent beta degradation.
Pin 3:
Zener Positive. Must have a higher positive value
Pin 7:
Emitter of Sensing and Compensating Transistors. than Pin 4.
Pin 8:
Collector of Sensing Transistor.
Pin 4:
Substrate and Zener Negative. Must have a higher positive value than Pin 7. If Q1 is zenered (about 7V) a permanent degradation in beta will result. 1000afe For more information www.linear.com/LTZ1000 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Revision History Package Description Related Parts