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Linear Technology Electronic Components Datasheet


LH0070

Precision 10 Volt Reference



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LH0070 pdf
LT1031/LH0070
Precision 10V Reference
FEATURES
Pin Compatible with LH0070 and AD581*
Ultralow Drift—5ppm/°C Max Slope
Trimmed Output Voltage
Operates in Series or Shunt Mode
Output Sinks and Sources in Series Mode
Very Low Noise < 1ppmP-P 0.1Hz to 10Hz
> 100dB Ripple Rejection
Minimum Input Voltage of 11V
U
APPLICATIO S
A-to-D and D-to-A Converters
Precision Regulators
Digital Voltmeters
lnertial Navigation Systems
Precision Scales
Portable Reference Standard
DESCRIPTIO
The LT®1031 is a precision 10V reference with ultralow
drift and noise, extremely good long term stability, and
almost total immunity to input voltage variations. The
reference output will both source and sink up to 10mA and
can be used as a shunt regulator (two terminal Zener) with
the same precision characteristics as the three terminal
connection. Special care has been taken to minimize
thermal regulation effects and temperature induced
hysteresis.
The LT1031 reference is based on a buried Zener diode
structure which eliminates noise and stability problems
associated with surface breakdown devices. Further, a
subsurface Zener exhibits better temperature drift and
time stability than even the best band-gap references.
Unique circuit design makes the LT1031 the first three
terminal IC reference to offer ultralow drift without the
use of high power on-chip heaters. Output voltage is
pretrimmed to 0.05% accuracy.
The LT1031 can be used as a plug-in replacement for
the AD581 and LH0070,* with improved electrical and
thermal performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*See LH0070 Electrical Characteristics table and AD581 cross reference guide.
TYPICAL APPLICATIO
Basic Positive and
Negative Connections
LT1031
VIN IN
OUT VOUT
GND
LT1031
OUT
GND
– VOUT
R1 = VIN – VOUT
ILOAD + 1.5mA
R1
– VIN
LT1031 • TA01
Distribution of Output Accuracy
40
TA = 25°C
35 DISTRIBUTION
FROM 5 RUNS
30
25
20
15
10
5
0
–0.10 –0.06 –0.02 0 0.02 0.06 0.10
OUTPUT ACCURACY (%)
LT1031 TA02
1031fb
1



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LH0070 pdf
LT1031/LH0070
ABSOLUTE AXI U RATI GS
(Note 1)
Input Voltage ........................................................... 40V
Input-Output Voltage Differential ............................. 35V
Output to Ground Voltage
(Shunt Mode Current Limit) ................................. 16V
Trim Pin to Ground Voltage
Positive ................................................. Equal to VOUT
Negative ............................................................. –20V
Output Short-Circuit Duration
VIN = 35V ......................................................... 10 sec
VIN 20V ..................................................... Indefinite
Operating Temperature Range
LT1031M .......................................... –55°C to 125°C
LT1031C .................................................. 0°C to 70°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
INPUT
1
2
3
OUTPUT
GROUND
H PACKAGE
3-LEAD TO-39 METAL CAN
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W (LH0070)
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W (LT1031M)
TJMAX = 85°C, θJA = 150°C/W, θJC = 45°C/W (LT1031C)
ORDER PART NUMBER
LH0070-0H
LH0070-1H
LH0070-2H
LT1031BMH
LT1031DMH
LT1031BCH
LT1031CCH
LT1031DCH
ELECTRICAL CHARACTERISTICS (LT1031) The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, IOUT = 0, Mil or Comm version, unless noted.
SYMBOL
PARAMETER
CONDITIONS
LT1031
MIN TYP
MAX
UNITS
VR Output Voltage (Note 2)
LT1031B
LT1031C
LT1031D
9.995
9.990
9.980
10.000
10.000
10.000
10.005
10.010
10.020
V
V
V
VR Output Voltage Temperature
T Coefficient (Note 3)
TMIN TJ TMAX
LT1031B
LT1031C
LT1031D
35
6 15
10 25
ppm/°C
ppm/°C
ppm/°C
VR Line Regulation (Note 4)
VIN
11.5V VIN 14.5V
4.5V VIN 40V
14
6
0.5 2
4
ppm/V
ppm/V
ppm/V
ppm/V
VR
Load Regulation (Sourcing Current)
0 IOUT 10mA
IO (Note 4)
VR Load Regulation (Shunt Mode)
IO
1.7mA ISHUNT 10mA
(Notes 4, 5)
IQ Series Mode Supply Current
12 25
40
50 100
150
1.2 1.7
2.0
ppm/mA
ppm/mA
ppm/mA
ppm/mA
mA
mA
IMIN
en
VR
Time
Shunt Mode Minimum Current
Output Short-Circuit Current
Minimum Input Voltage (Note 7)
Output Voltage Noise
Long Term Stability of
Output Voltage
VIN is Open
11V VIN 35V
lOUT 1mA
0.1Hz f 10Hz
10Hz f 10kHz
t = 1000 Hrs
Non-Cumulative
1.1 1.5
30
10.8 11.0
6
11
15
mA
mA
V
µVP-P
µVRMS
ppm
Temperature Hysteresis of Output
T = 50°C
5 ppm
1031fb
2



Part Number LH0070
Description Precision 10 Volt Reference
Maker Linear Technology - Linear Technology
Total Page 12 Pages
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