LT1236
Precision Reference
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DESCRIPTIO
EATURE
S
F
The LT®1236 is a precision reference that combines ultra-
low drift and noise with excellent long-term stability and
high output accuracy. The reference output will both
source and sink up to 10mA and is almost totally immune
to input voltage variations. Two voltages are available: 5V
and10V. The10Vversioncanbeusedasashuntregulator
(two-terminal zener) with the same precision characteris-
tics as the three-terminal connection. Special care has
been taken to minimize thermal regulation effects and
temperature induced hysteresis.
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Ultra-Low Drift: 5ppm/°C Max
Trimmed to High Accuracy: 0.05% Max
Industrial Temperature Range SO Package
Operates in Series or Shunt Mode
Pin Compatible with AD586, AD587
Output Sinks and Sources in Series Mode
Very Low Noise < 1ppm P-P (0.1Hz to 10Hz)
100% Noise Tested
> 100dB Ripple Rejection
Minimum Input/Output Differential of 1V
The LT1236 combines both superior accuracy and tem-
peraturecoefficientspecificationswithouttheuseofhigh
power,on-chipheaters.TheLT1236referencesarebased
on a buried zener diode structure which eliminates noise
and stability problems with surface breakdown devices.
Further, a subsurface zener exhibits better temperature
drift and time stability than even the best band-gap
references.
O U
PPLICATI
S
A
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A/D and D/A Converters
Precision Regulators
Precision Scales
Inertial Navigation Systems
Digital Voltmeters
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
O
TYPICAL APPLICATI
Typical Distribution of Temperature Drift
Basic Positive and Negative Connections
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DISTRIBUTION
OF THREE RUNS
22
LT1236
LT1236-10
IN
OUT
20
18
16
14
12
10
8
V
IN
IN
V
OUT
OUT
NC
GND
GND
–V
OUT
–
V
OUT
– (V )
+ 1.5mA
R1 =
R1
–15V
I
LOAD
6
–
(V
)
4
LT1236 TA01
2
0
–3
–1
0
1
2
3
–2
OUTPUT DRIFT (ppm/°C)
LT1236 TA02
1