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LTZ1000/LTZ1000A
1
1000afe
For more information www.linear.com/LTZ1000
Typical applicaTion
FeaTures
applicaTions
DescripTion
Ultra Precision Reference
The LTZ1000 and LTZ1000A are ultra-stable temperature
controllable references. They are designed to provide 7V
outputs with temperature drifts of 0.05ppm/°C, about
1.2µV
P-P
of noise and long-term stability of 2µV/√kHr.
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 flexibility and best long-
term stability and noise.
The LTZ 1000 and LT Z1000A references can provide su
-
perior per
formance 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 LT Z1000A uses a proprietary die attach
method to provide significantly higher thermal resistance
than the LTZ1000.
Low Noise Reference
n
1.2µV
P-P
Noise
n
2µV/√kHr Long-Term Stability
n
Very Low Hysteresis
n
0.05ppm/°C Drift
n
Temperature Stabilized
n
400°C/W Thermal Resistance for LTZ1000A Reduces
Insulation Requirements
n
Specified for –55°C to 125°C Temperature Range
n
Offered in TO-99 package
n
Voltmeters
n
Calibrators
n
Standard Cells
n
Scales
n
Low Noise RF Oscillators
Long-Term Stability
L, LT, LTC , LT M , Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
–
+
LTZ1000
OUTPUT
1N4148
LT
®
1006
V
IN
≥ 10V
30k
3
7
4
6
2
0.02µF
120Ω
1000 TA01
DAYS
0
–2
(ppm)
0
2
10
LONG-TERM STABILITY OF A TYPICAL DEVICE FROM TIME = 0
WITH NO PRECONDITIONING OR AGING
1000 TA01b
3020
