LT1019
Precision Reference
FEATURES
DESCRIPTIO
Tight Initial Output Voltage: <0.05% The LT 1019 is a third generation bandgap voltage refer-
Ultralow Drift: 3ppm/C Typical ence utilizing thin film technology and a greatly improved
Series or Shunt Operation curvature correction technique. Wafer level trimming of
Curvature Corrected both reference and output voltage combines to produce
Ultrahigh Line Rejection: 0.5ppm/V very low TC and tight initial output voltage tolerance.
Low Output Impedance: 0.02
The LT1019 can both sink and source up to 10mA and can
Plug-In Replacement for Present References
be used in either the series or shunt mode, allowing the
Available at 2.5V, 4.5V, 5V, and 10V
reference to operate with positive or negative output
100% Noise Tested
voltages without external components. Minimum input/
Temperature Output
output voltage is less than 1V in the series mode, providing
Industrial Temperature Range in SO-8
improved tolerance of low line conditions and excellent
Available in 8-Lead N8 and S8 Packages
line regulation.
U
APPLICATIO S
The LT1019 is available in four voltages: 2.5V, 4.5V, 5V
and 10V. It is a direct replacement for most bandgap
Negative Shunt References
references presently available including AD580, AD581,
A/D and D/A Converters
REF-01, REF-02, MC1400, MC1404 and LM168.
Precision Regulators
, LTC and LT are registered trademarks of Linear Technology Corporation.
Constant Current Sources
All other trademarks are the property of their respective owners.
V/F Converters
Bridge Excitation
TYPICAL APPLICATION
Output Voltage Drift
Ultralinear Strain Gauge
15V 357*
0.5W 5V
1.003
R3
10ppm/C
IN OUT 1.002
2M
FULL TEMP RANGE BOX
350
LT1019-5
BRIDGE
1.001
R2
GND
20k
LT1019
CURVE
1.000
A1 A2
R4
GAIN = 100
LT1637 LT1001
20k
+
0.999
5ppm/C
0C TO 70C BOX
ACTIVE
ELEMENT
R5
0.998 UNCOMPENSATED
2M
R6** STANDARD BANDGAP
2M DRIFT CURVE
0.997
50 25 0 25 50 75 100 125
LT1019 TA01
5V
TEMPERATURE (C)
357* *REDUCES REFERENCE AND AMPLIFIER
1019 TA02
0.5W LOADING TO 0.
**IF R6 = R3, BRIDGE IS NOT LOADED BY R2 AND R4.
15V
A1 V AND DRIFT ARE NOT CRITICAL BECAUSE A2
OS
ACTS AS A DIFFERENTIAL AMPLIFIER.
1019fd
1
OUTPUT VOLTAGE (NORMALIZED) (V)
+
U
ULT1019
ABSOLUTEXAI U RATI GS
(Note 1)
Specified Temperature Range
Input Voltage .......................................................... 40V
Commercial ............................................. 0C to 70C
Output Voltage (Note 2)
Industrial ............................................ 40C to 85C
LT1019-5, LT1019-10 ........................................ 16V
Military ............................................. 55C to 125C
LT1019-2.5, LT1019-4.5 ...................................... 7V
Trim Pin Voltage ................................................... 30V
Output Short-Circuit Duration (Note 2)
Temp Pin Voltage ..................................................... 5V
V < 20V .................................................... Indefinite
IN
Storage Temperature Range (Note 11) 65C to 150C
20V V 35V ............................................. 10 sec
IN
Lead Temperature (Soldering, 10 sec)................. 300C
/O
PACKAGE RDER I FOR ATIO
TOP VIEW
TOP VIEW
TOP VIEW
DNC*
8
DNC* 1 DNC*
8
DNC* 1 8 DNC*
DNC* 1
7 DNC*
INPUT 2 7 DNC*
INPUT DNC*
2 7
INPUT 2 6 OUTPUT
TEMP 3 OUTPUT
6
TEMP 3 6 OUTPUT
GND 4 5 TRIM
GND 4 5 TRIM
TEMP 3 5 TRIM
4
N8 PACKAGE
S8 PACKAGE
GND (CASE)
8-LEAD PDIP
8-LEAD PLASTIC SO
H PACKAGE
*INTERNALLY CONNECTED. DO NOT *INTERNALLY CONNECTED. DO NOT
8-LEAD TO-5 METAL CAN
CONNECT EXTERNALLY. CONNECT EXTERNALLY.
*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY
T = 100C, = 130C/ W T = 100C, = 130C/ W
JMAX JA
JMAX JA
T = 150C, = 150C/ W, = 45C/W
JMAX JA JC
ORDER PART ORDER PART ORDER PART S8 PART
NUMBER NUMBER MARKING
NUMBER
LT1019CH-2.5 LT1019ACN8-2.5 LT1019ACS8-2.5 019A25
LT1019ACH-2.5 LT1019CN8-5
LT1019ACH-4.5 LT1019CH-4.5 LT1019ACN8-4.5 LT1019CN8-10 LT1019ACS8-5 1019A5
LT1019CH-5 LT1019ACN8-5 LT1019AIS8-2.5 19AI25
LT1019ACH-5 LT1019IN8-2.5
LT1019ACH-10 LT1019CH-10 LT1019ACN8-10 LT1019IN8-4.5 LT1019AIS8-5 019AI5
LT1019MH-2.5 LT1019CN8-2.5 LT1019CS8-2.5 1925
LT1019AMH-2.5 LT1019IN8-5
LT1019AMH-4.5 LT1019MH-4.5 LT1019CN8-4.5 LT1019IN8-10 LT1019CS8-4.5 1945
LT1019MH-5 LT1019CS8-5 1905
LT1019AMH-5
LT1019AMH-10 LT1019MH-10 LT1019CS8-10 1910
LT1019IS8-2.5 19I25
OBSOLETE
LT1019IS8-5 19I05
CONSIDER THE N8 OR S8 FOR
ALTERNATE SOURCES.
1019fd
2
U
WU
U W W W