LT1019 Linear Technology, LT1019 Datasheet

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LT1019

Manufacturer Part Number
LT1019
Description
2.5V Reference
Manufacturer
Linear Technology
Datasheet

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FEATURES
APPLICATIO S
TYPICAL
15V
Tight Initial Output Voltage: < 0.05%
Ultralow Drift: 3ppm/ C Typical
Series or Shunt Operation
Curvature Corrected
Ultrahigh Line Rejection: 0.5ppm/V
Low Output Impedance: 0.02
Plug-In Replacement for Present References
Available at 2.5V, 4.5V, 5V, and 10V
100% Noise Tested
Temperature Output
Industrial Temperature Range in SO-8
Negative Shunt References
A/D and D/A Converters
Precision Regulators
Constant Current Sources
V/F Converters
Bridge Excitation
IN
LT1019-5
357 *
0.5W
GND
OUT
LT1637
A1
5V
APPLICATION
+
U
Ultralinear Strain Guage
BRIDGE
ACTIVE
ELEMENT
350
–15V
357 *
0.5W
–5V
U
**
*
REDUCES REFERENCE AND AMPLIFIER
LOADING TO 0.
IF R6 = R3, BRIDGE IS NOT LOADED BY R2 AND R4.
A1 V
ACTS AS A DIFFERENTIAL AMPLIFIER.
20k
20k
R2
R4
OS
AND DRIFT ARE NOT CRITICAL BECAUSE A2
R5
2M
+
LT1001
A2
2M
R3
2M
R6**
LT1019 • TA01
DESCRIPTIO
The LT
ence utilizing thin film technology and a greatly improved
curvature correction technique. Wafer level trimming of
both reference and output voltage combines to produce
units with high yields to very low TC and tight initial
tolerance of output voltage.
The LT1019 can both sink and source up to 10mA and can
be used in either the series or shunt mode. This allows the
reference to be used for both positive and negative output
voltages without external components. Minimum input/
output voltage is less than 1V in the series mode, providing
improved tolerance of low line conditions.
The LT1019 is available in four voltages: 2.5V, 4.5V, 5V
and 10V. It is a direct replacement for most bandgap
references presently available including AD580, AD581,
REF-01, REF-02, MC1400, MC1404 and LM168.
, LTC and LT are registered trademarks of Linear Technology Corporation.
GAIN = 100
®
1019 is a third generation bandgap voltage refer-
U
Precision Reference
1.003
1.002
0.999
0.997
1.001
1.000
0.998
–50
–25
Output Voltage Drift
FULL TEMP RANGE “BOX”
“STANDARD” BANDGAP
0 C TO 70 C “BOX”
0
UNCOMPENSATED
TEMPERATURE (˚C)
DRIFT CURVE
10ppm/ C
5ppm/ C
25
50
LT1019
75
LT1019
CURVE
100
1019 TA02
1
125

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LT1019 Summary of contents

Page 1

... TC and tight initial tolerance of output voltage. The LT1019 can both sink and source up to 10mA and can be used in either the series or shunt mode. This allows the reference to be used for both positive and negative output voltages without external components ...

Page 2

... LT1019 BSOLUTE Input Voltage .......................................................... 40V Output Voltage (Note 2) LT1019-5, LT1019-10 ........................................ 16V LT1019-2.5, LT1019-4.5 ...................................... 7V Output Short-Circuit Duration (Note 2) V < 20V .................................................... Indefinite IN 20V V 35V ............................................. 10 sec IN U PACKAGE/ORDER I FOR ATIO TOP VIEW DNC* 8 DNC DNC* 6 OUTPUT INPUT 2 5 TRIM TEMP ...

Page 3

... LT1019AMH-5 0.2 25 LT1019MH-5 0.05 5 LT1019ACH-10 0.2 20 LT1019CH-10 0.2 20 0.05 10 LT1019AMH-10 0.2 25 LT1019MH-10 CONDITIONS MIN LT1019C ( LT1019I (– LT1019M (– 125 1.5V) V 40V OUT IN 50Hz f 400Hz 90 84 LT1019 PACKAGE TYPE SO-8 PDIP-8 S8 LT1019ACS8-2.5 LT1019ACN8-2.5 LT1019CS8-2.5 LT1019CN8-2.5 LT1019AIS8-2.5 LT1019IS8-2.5 LT1019IN8-2.5 LT1019ACN8-4.5 LT1019CS8-4.5 LT1019CN8-4.5 LT1019IN8-4 ...

Page 4

... Series Mode Minimum Shunt Current (Note 8) Minimum Input/Output I OUT Voltage Differential I OUT Trim Range LT1019-2.5 LT1019-5 LT1019-10 I Short-Circuit Current Output Connected to GND e Output Voltage Noise 10Hz f 1kHz n (Note 10) 0.1Hz f 10Hz Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired ...

Page 5

... Load Regulation 2 25°C J 1.5 LT1019-10 1.0 LT1019-4.5/LT1019-5 0.5 LT1019-2.5 0 –0.5 –1.0 –1.5 –2.0 –10 –8 –6 –4 – SINKING SOURCING OUTPUT CURENT (mA) LT1019 • TPC05 Shunt Mode Characteristics (LT1019-5) 1.0 INPUT OPEN 0.9 0.8 0.7 0.6 0.5 0.4 0 125° 25° –55° ...

Page 6

... One is a gradient effect, where power dissipation on the die creates temperature gradients. These gradients can cause output voltage shifts even if the overall tempera- ture coefficient of the reference is zero . The LT1019, unlike previous references, specifies thermal regulation caused by die temperature gradients.The specification is ...

Page 7

... The LT1019 was made compatible with existing references, so the trim range is large: + 6%, – 6% for the LT1019-2.5, + 5%, – 13% for the LT1019-5, and + 5%, – 27% for the LT1019-10. This large trim range makes precision trim- ming rather difficult. One solution is to insert resistors in series with both ends of the potentiometer ...

Page 8

... A, about ten times improvement over previous references. Output Bypassing The LT1019 is designed to be stable with a wide range of load currents and output capacitors. The 4.5V, 5V, and 10V devices do not oscillate under any combination of TYPICAL APPLICATIO S Wide Range Trim ...

Page 9

... IN V OUT 11V COMPLIANCE 1019 TA07 Output Current Boost with Current Limit + 2.8V) GLOWS IN R1 LED CURRENT LIMIT 220 (DO NOT OMIT) IN LT1019 OUT GND Trimming LT1019-10 Output to 10.240V V OUT OUT 90. LT1019-10 5k* TRIM 1% TRIM GND 4.02k 1% *LOW TC CERMET 1019 TA06 ...

Page 10

... LT1019 W SCHE ATIC DIAGRA 10 W ...

Page 11

... TYP BSC LT1019 0.027 – 0.045 (0.686 – 1.143) PIN 1 0.028 – 0.034 (0.711 – 0.864) 0.200 (5.080) TYP 0.110 – 0.160 (2.794 – ...

Page 12

... LT1019 U TYPICAL APPLICATION OUT LT1019-10 TRIM GND 1.2k –15V RELATED PARTS PART NUMBER DESCRIPTION LT1027 Precision 5V Reference LT1236 Precision Reference LT1460 Micropower Precision Series Reference LT1634 Micropower Precision Shunt Reference LTC1798 Micropower Low Dropout Reference LT1461 Micropower Low Dropout Reference Linear Technology Corporation 12 1630 McCarthy Blvd ...

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