下载
1
LT1236
Precision Reference
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
D
U
ESCRIPTIO
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.
S
F
EA
T
U
RE
■
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
Typical Distribution of Temperature Drift
Basic Positive and Negative Connections
LT1236
OUT
IN
GND
LT1236-10
OUT
IN
GND
V
OUT
–V
OUT
V
IN
NC
R1 =
V
OUT
– (V
–
)
I
LOAD
+ 1.5mA
–15V
(V
–
)
R1
LT1236 TA01
OUTPUT DRIFT (ppm/°C)
–3
0
UNITS (%)
4
8
12
16
24
22
–2
–1 0 1
LT1236 TA02
23
20
18
14
10
6
2
DISTRIBUTION
OF THREE RUNS
U
S
A
O
PP
L
IC
AT
I
■
A/D and D/A Converters
■
Precision Regulators
■
Precision Scales
■
Inertial Navigation Systems
■
Digital Voltmeters
