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LTZ1000_06 Datasheet, PDF (1/8 Pages) Linear Technology – Ultra Precision Reference | |||
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LTZ1000/LTZ1000A
Ultra Precision Reference
FEATURES
â 1.2µVP-P Noise
â 2µV/âkHr Long Term Stability
â Very Low Hysteresis
â 0.05ppm/°C Drift
â Temperature Stabilized
â 400°C/W Thermal Resistance for LTZ1000A reduces
insulation requirements
â Speciï¬ed for â55°C to 125°C Temperature Range
â Offered in TO-99 package
APPLICATIONS
â Voltmeters
â Calibrators
â Standard Cells
â Scales
â Low Noise RF Oscillators
DESCRIPTION
The LTZ®1000 and LTZ1000A are ultra stable temperature
controllable references. They are designed to provide 7V
outputs with temperature drifts of 0.05ppm/°C, about
1.2µVP-P of noise and long term stability of 2µV/âkHr.
Included on the chip is a subsurface Zener reference, a
heater resistor for temperature stabilization, and a tem-
perature sensing transistor. External circuitry is used to
set operating currents and to temperature stabilize the
reference. This allows maximum ï¬exibility and best long
term stability and noise.
The LTZ1000 and LTZ1000A references can provide su-
perior performance to older devices such as the 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 signiï¬cantly higher thermal resistance
than the LTZ1000.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Low Noise Reference
LTZ1000
30k
VIN ⥠10V
OUTPUT
3+ 7
6
LT®1006
2â
4
1N4148
120â¦
0.02µF
1000 TA01
Long Term Stability
2
0
â2
0
10
20
30
DAYS
LONG TERM STABILITY OF A TYPICAL DEVICE FROM TIME = 0
WITH NO PRECONDITIONING OR AGING
1000 TA01b
1000afb
1
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