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Linear Technology Electronic Components Datasheet

LT1027 Datasheet

Precision 5V Reference

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LT1027
Precision
5V Reference
FEATURES
s Very Low Drift: 2ppm/°C Max TC
s Pin Compatible with LT1021-5, REF-02,
(TO-5 and PDIP Packages Only)
s Output Sources 15mA, Sinks 10mA
s Excellent Transient Response Suitable for
A-to-D Reference Inputs
s Noise Reduction Pin
s Excellent Long Term Stability
s Less Than 1ppm P-P Noise (0.1Hz to 10Hz)
U
APPLICATIO S
s A-to-D and D-to-A Converters
s Digital Voltmeters
s Reference Standard
s Precision Current Source
DESCRIPTIO
The LT®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’s 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.
TYPICAL APPLICATIO
Supplying VREF and VCC to the LTC®1290 12-bit ADC
+
2.2µF
8V TO 40V
VIN
VOUT
LT1027
VTRIM
GND
ANALOG
INPUTS
+
10k 22µF
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
VCC SCLK
ACLK
DOUT
DIN
CS
LTC1290
REF+
REF
AGND VDGND
TO µC
1027 TA01
Output Voltage
5.006
5.004
5.002
5.000
4.998
4.996
4.994
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
1027 TA02
1


Linear Technology Electronic Components Datasheet

LT1027 Datasheet

Precision 5V Reference

No Preview Available !

LT1027
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage (VIN) ............................................... 40V
Input-Output Voltage Differential ............................ 35V
Output to Ground Voltage ......................................... 7V
VTRIM to Ground Voltage
Positive ................................................................ 5V
Negative .......................................................... – 0.3V
Output Short-Circuit Duration
VIN > 20V ........................................................ 10 sec
VIN 20V ................................................... Indefinite
Operating Temperature Range
LT1027C ................................................ 0°C to 70°C
LT1027M ......................................... – 55°C to 125°C
Storage Temperature Range
All Devices ....................................... – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NC*
8
NC* 1
7 NC*
VIN 2
6 VOUT
NR 3
5 VTRIM
4
GND
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
TOP VIEW
NC* 1
VIN 2
NR 3
GND 4
8 NC*
7 NC*
6 VOUT
5 VTRIM
N8 PACKAGE
8-LEAD PDIP
TJMAX = 100°C, θJA = 130°C/W
TOP VIEW
NR 1
GND 2
VTRIM 3
VOUT 4
8 VIN
7 NC*
6 NC*
5 NC*
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 100°C, θJA = 180°C/W
ORDER PART NUMBER
ORDER PART NUMBER
ORDER PART NUMBER
LT1027ACH-5
LT1027BCH-5
LT1027CCH-5
LT1027DCH-5
LT1027ECH-5
LT1027BCN8-5
LT1027CCN8-5
LT1027DCN8-5
LT1027ECN8-5
LT1027CCS8-5
LT1027DCS8-5
LT1027ECS8-5
S8 PART MARKING
1027C5
1027D5
1027E5
*Connected internally. Do not connect external circuitry to these pins. Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range otherwise specifications are at TA = 25°C. VIN = 10V, ILOAD = 0, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
VOUT Output Voltage (Note 2)
LT1027A
LT1027B, C, D
LT1027E
4.9990
4.9975
4.9950
5.000 5.0010
5.000 5.0025
5.000 5.0050
TCVOUT
Output Voltage Temperature Coefficient
(Note 3)
LT1027A, B
LT1027C
LT1027D
LT1027E
q
q
q
q
12
23
25
3 7.5
UNITS
V
ppm/°C
2


Part Number LT1027
Description Precision 5V Reference
Maker Linear Technology
Total Page 8 Pages
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