LT1236_15 Datasheet, PDF (1/12 Pages) Linear Technology – Precision Reference

LT1236
Precision Reference
FEATURES
s _{Ultra-Low Drift: 5ppm/°C Max}
s _{Trimmed to High Accuracy: 0.05% Max}
s _{Industrial Temperature Range SO Package}
s _{Operates in Series or Shunt Mode}
s _{Pin Compatible with AD586, AD587}
s _{Output Sinks and Sources in Series Mode}
s _{Very Low Noise < 1ppm P-P (0.1Hz to 10Hz)}
s _{100% Noise Tested}
s _{> 100dB Ripple Rejection}
s _{Minimum Input/Output Differential of 1V}
APPLICATI S
s _{A/D and D/A Converters}
s _{Precision Regulators}
s _{Precision Scales}
s _{Inertial Navigation Systems}
s _{Digital Voltmeters}
DESCRIPTIO
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
and 10V. The 10V version can be used as a shunt regulator
(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.
The LT1236 combines both superior accuracy and tem-
perature coefficient specifications without the use of high
power, on-chip heaters. The LT1236 references are based
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATI
Basic Positive and Negative Connections
LT1236
V_IN
IN
OUT
V_OUT
GND
LT1236-10
NC IN
OUT
GND
R1 = ^{VOUT – (V – )}
I_LOAD + 1.5mA
–V_OUT
R1
–15V
(V ^–)
LT1236 TA01
Typical Distribution of Temperature Drift
24
DISTRIBUTION
22 _{OF THREE RUNS}
20
18
16
14
12
10
8
6
4
2
0
–3 –2 –1
0
1
23
OUTPUT DRIFT (ppm/°C)
LT1236 TA02
1