ltz1000a Linear Technology Corporation, ltz1000a Datasheet
ltz1000a
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ltz1000a Summary of contents
Page 1
... LM199, provided that the user implements the heater control and properly manages the thermal layout. To simplify thermal insulation, the LTZ1000A uses a proprietary die attach method to provide signifi cantly higher thermal resistance than the LTZ1000. ...
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... C LTZ1000 Time = 5 Minutes LTZ1000A Time = 5 Minutes T = 65°C Note 2: All testing is done at 25°C. Pulse testing is used for LTZ1000A to minimize temperature rise during testing. LTZ1000 and LTZ1000A devices are QA tested at –55°C and 125°C. BOTTOM VIEW ...
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... TIME (SECONDS) Pin 5: Temperature Compensating Transistor Collector. Pin 6: Temperature Sensing Transistor Base. If the base emitter junction is zenered (about 7V) the transistor will suffer permanent beta degradation. Pin 7: Emitter of Sensing and Compensating Transistors. Pin 8: Collector of Sensing Transistor. LTZ1000/LTZ1000A Zener Noise I = 4mA 0.5mA ...
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... LTZ1000/LTZ1000A BLOCK DIAGRAM *SUBSTRATE DEVICES–DO NOT FORWARD BIAS APPLICATIONS INFORMATION LTZ1000 and LTZ1000A are capable of providing ultimate voltage reference performance. Temperature drifts of better than 0.03ppm/°C and long-term stability on the order of 1μV per month can be achieved. Noise of about 0.15ppm can also be obtained. This performance is at the expense of circuit complexity, since external infl ...
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... 0.01% R4/R5 RATIO BOTH A1 AND A2 CONTRIBUTE LESS THAN 2μV OF OUTPUT DRIFT OVER A 50°C RANGE LTZ1000A causes a temperature rise of about 10°C. Of course both types of devices should be insulated from ambient. Several minutes of warm-up is usual. For applications not requiring the extreme precision or the low noise of the LTZ1000, Linear Technology makes a broad line of voltage references. Devices like the LT1021 can provide drifts as low as 2ppm/° ...
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... LTZ1000/LTZ1000A TYPICAL APPLICATIONS Averaging Reference Voltage for Lower Noise and Better Stability V 15V IN 0.01% 1.6k 30Ω* OUTPUT 150Ω Adjusting Temperature Coeffi cient in Unstabilized Applications R1 70k 200Ω 120Ω * PULSE HEATER ON AND OFF TO HEAT AND COOL THE REFERENCE. ADJUST R1 FOR MINIMUM VOLTAGE CHANGE THROUGH A TEMPERATURE CYCLE. THE – ...
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... A1 2N3904 LT1013 6 – *PROVIDES TC COMPENSATION, DELETE FOR LTZ1000A APPROXIMATE CHANGE IN REFERENCE VOLTAGE FOR A 100ppm (0.01%) CHANGE IN RESISTOR VALUES: R(Ω) 0.012Ω R1 7Ω R2 7Ω 0.01% R4/R5 RATIO BOTH A1 AND A2 CONTRIBUTE LESS THAN 2μV OF OUTPUT DRIFT OVER A 50°C RANGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable ...
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... LTZ1000/LTZ1000A PACKAGE DESCRIPTION SEATING PLANE .010 – .045* (0.254 – 1.143) 45° .028 – .034 (0.711 – 0.864) (2.794 – 4.064) * LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND THE SEATING PLANE ** FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS RELATED PARTS ...