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LH0070 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer LH0070
Beschreibung (LH0070 / LH0071) Precision BCD Buffered Reference
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 6 Seiten
LH0070 Datasheet, Funktion
www.DataSheet4U.com
July 1987
LH0070 Series Precision BCD Buffered Reference
LH0071 Series Precision Binary Buffered Reference
General Description
The LH0070 and LH0071 are precision three terminal volt-
age references consisting of a temperature compensated
zener diode driven by a current regulator and a buffer ampli-
fier The devices provide an accurate reference that is virtu-
ally independent of input voltage load current temperature
and time The LH0070 has a 10 000V nominal output to
provide equal step sizes in BCD applications The LH0071
has a 10 240V nominal output to provide equal step sizes in
binary applications
The output voltage is established by trimming ultra-stable
low temperature drift thin film resistors under actual operat-
ing circuit conditions The devices are shortcircuit proof in
both the current sourcing and sinking directions
The LH0070 and LH0071 series combine excellent long
term stability ease of application and low cost making
them ideal choices as reference voltages in precision D to A
and A to D systems
Features
Y Accuracy output voltage
LH0070
10Vg0 02%
LH0071
10 24Vg0 02%
Y Single supply operation
11 4V to 40V
Y Low output impedance
0 2X
Y Excellent line regulation
0 1 mV V
Y Low zener noise
20 mVp-p
Y 3-lead TO-5 (pin compatible with the LM109)
Y Short circuit proof
Y Low standby current
3 mA
Equivalent Schematic
Connection Diagram
TO-5 Metal Can Package
Typical Applications
TL H 5550 – 1
Statistical Voltage Standard
TL H 5550 – 7
Order Number LH0070-0H LH0071-0H LH0070-1H
LH0071-1H LH0070-2H or LH0071-2H
See NS Package Number H03B
Output Voltage Fine Adjustment
TL H 5550 – 9
TL H 5550 – 8
Note The output of the LH0070 and LH0071 may be adjusted to a precise voltage by using the above circuit since the supply current of the devices is
relatively small and constant with temperature and input voltage For the circuit shown supply sensitivities are degraded slightly to 0 01% V change in VOUT
for changes in VIN and Vb
An additional temperature drift of 0 0001% C is added due to the variation of supply current with temperature of the LH0070 and LH0071 Sensitivity to the
value of R1 R2 and R3 is less than 0 001% %
C1995 National Semiconductor Corporation TL H 5550
RRD-B30M115 Printed in U S A






LH0070 Datasheet, Funktion
www.DataSheet4U.com
Physical Dimensions inches (millimeters)
Metal Can Package (H)
Order Number LH0070-0H LH0071-0H LH0070-1H
LH0071-1H LH0070-2H or LH0071-2H
NS Package Number H03B
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
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National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications

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