LT1027
Precision
5V Reference
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
Very Low Drift: 2ppm/擄C Max TC
Pin Compatible with LT1021-5, REF-02,
(TO-5 and PDIP Packages Only)
Output Sources 15mA, Sinks 10mA
Excellent Transient Response Suitable for
A-to-D Reference Inputs
Noise Reduction Pin
Excellent Long Term Stability
Less Than 1ppm
P-P
Noise (0.1Hz to 10Hz)
APPLICATIO S
s
s
s
s
The LT
廬
1027 is a precision reference with extra-low drift,
superior accuracy, excellent line and load regulation and
low output impedance at high frequency. This device is
intended for use in 12- to 16-bit A-to-D and D-to-A
systems where demanding accuracy requirements must
be met without the use of power hungry, heated substrate
references. The fast settling output recovers quickly from
load transients such as those presented by A-to-D converter
reference inputs. The LT1027 brings together both
outstanding accuracy and temperature coefficient
specifications.
The LT1027 reference is based on LTC鈥檚 proprietary
advanced subsurface Zener bipolar process which
eliminates noise and stability problems associated with
surface breakdown devices.
, LTC and LT are registered trademarks of Linear Technology Corporation.
A-to-D and D-to-A Converters
Digital Voltmeters
Reference Standard
Precision Current Source
TYPICAL APPLICATIO
Supplying V
REF
and V
CC
to the LTC
廬
1290 12-bit ADC
Output Voltage
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
REF
+
REF
鈥?/div>
V
CC
S
CLK
A
CLK
D
OUT
D
IN
CS
OUTPUT VOLTAGE (V)
ANALOG
INPUTS
8V TO 40V
TO
碌C
LTC1290
V
IN
+
2.2碌F
LT1027
V
OUT
+
V
TRIM
10k
22碌F
AGND
V
鈥?/div>
DGND
GND
1027 TA01
U
5.006
5.004
5.002
5.000
4.998
4.996
4.994
鈥?0
鈥?5
50
25
0
TEMPERATURE (擄C)
75
100
1027 TA02
U
U
1
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