
LM185-1.2/
LM285-1.2/LM385-1.2
1
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
s
Portable Meter References
s
Portable Test Instruments
s
Battery Operated Systems
s
Current Loop Instrumentation
s
10
A to 20mA Operating Range
s
Guaranteed 1% Initial Voltage Tolerance
s
Guaranteed 1
Dynamic Impedance
s
Very Low Power Consumption
Micropower Voltage
Reference
Reverse Voltage Change with Current
The LM185-1.2 is a two terminal band gap reference diode
that has been designed for applications which require
precision performance with micropower operation. The
device provides guaranteed operating specifications at
currents as low as 10
A. The nominal voltage is 1.235V
with both 1% and 2% tolerances available. Some addi-
tional features are: maximum dynamic impedance of 1
,
low noise and excellent stability over time and tempera-
ture. Advanced design, processing and testing techniques
make Linear’s LM185-1.2 a superior choice over previous
designs. A micropower 5V reference application is shown
below. For guaranteed TC, micropower references, see the
LT1034 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Micropower 5V Reference
–
+
185/285/385 TA01a
V+
V–
LM385-1.2
LM334
LT1494
3
2
7
6
4
R
5.6k
150pF
3.01M
1%
1M
1%
VIN
7V TO 15V
5V
REVERSE CURRENT (mA)
OUTPUT
VOLTAGE
CHANGE
(mV)
10
8
6
4
2
0
–2
0.01
1
10
100
185/285/385 TA01b
0.1
TA = 25°C