Linear Technology LT1019 Datasheet

FEATURES

TEMPERATURE (˚C)

–50

OUTPUT VOLTAGE (NORMALIZED) (V)

1.001

1.002

1.003

25 75

1019 TA02

1.000

0.999

–25 0

50 100 125

0.998

0.997

5ppm/°C

0°C TO 70°C “BOX”

LT1019

CURVE

UNCOMPENSATED

“STANDARD” BANDGAP

DRIFT CURVE

10ppm/°C

FULL TEMP RANGE “BOX”

LT1019

Precision Reference

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DESCRIPTIO

■

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: ≈0.02Ω

■

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

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APPLICATIO S

■

Negative Shunt References

■

A/D and D/A Converters

■

Precision Regulators

■

Constant Current Sources

■

V/F Converters

■

Bridge Excitation

The LT®1019 is a third generation bandgap voltage refer­ence 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.

TYPICAL APPLICATION

15V

357Ω*

0.5W

IN

LT1019-5

GND

5V

OUT

†

A1

LT1637

Ultralinear Strain Guage

350Ω

BRIDGE

+

–

ACTIVE
ELEMENT

–15V

–5V

357Ω*

0.5W

U

R3
2M

R2

20k

R4

20k

*

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.

–

A2

LT1001

+

R5
2M

R6**

2M

LT1019 • TA01

AND DRIFT ARE NOT CRITICAL BECAUSE A2

OS

Output Voltage Drift

GAIN = 100

1

LT1019

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

1
2
3
4

8
7
6
5

DNC*

INPUT

TEMP

GND

DNC*
DNC*
OUTPUT
TRIM

*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY.

A

W

O

LUTEXI TIS

S

A

WUW

U

ARB

G

(Note 1)

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)

VIN < 20V.................................................... Indefinite

20V ≤ VIN ≤ 35V ............................................. 10 sec

WU

/

PACKAGE

DNC*

INPUT

TEMP

8-LEAD TO-5 METAL CAN

*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY

T

= 150°C, θ

JMAX

O

RDER I FOR ATIO

TOP VIEW

DNC*

8

1

2

3

4

GND (CASE)
H PACKAGE

= 150°C/ W, θJC = 45°C/W

JA

DNC*

7

DNC*

6

OUTPUT

5

TRIM

1

INPUT

2

TEMP

3

GND

4

*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY.

T

= 100°C, θ

JMAX

Specified Temperature Range

Commercial .............................................0°C to 70°C

Industrial ............................................ –40°C to 85°C

Military ............................................. –55°C to 125°C

Trim Pin Voltage................................................... ±30V

Temp Pin Voltage ..................................................... 5V

Storage Temperature Range (Note 11) –65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

U

TOP VIEW

DNC*

8

DNC*

7

OUTPUT

6

TRIM

5

N8 PACKAGE
8-LEAD PDIP

T

= 130°C/ W

JA

JMAX

= 100°C, θ

= 130°C/ W

JA

LT1019ACH-2.5
LT1019ACH-4.5
LT1019ACH-5
LT1019ACH-10
LT1019AMH-2.5
LT1019AMH-4.5
LT1019AMH-5
LT1019AMH-10

ORDER PART

NUMBER

LT1019CH-2.5
LT1019CH-4.5
LT1019CH-5
LT1019CH-10
LT1019MH-2.5
LT1019MH-4.5
LT1019MH-5
LT1019MH-10

ORDER PART

NUMBER

LT1019ACN8-2.5
LT1019ACN8-4.5
LT1019ACN8-5
LT1019ACN8-10
LT1019CN8-2.5
LT1019CN8-4.5

LT1019CN8-5
LT1019CN8-10
LT1019IN8-2.5
LT1019IN8-4.5
LT1019IN8-5
LT1019IN8-10

ORDER PART

NUMBER

LT1019ACS8-2.5
LT1019ACS8-5
LT1019AIS8-2.5
LT1019AIS8-5
LT1019CS8-2.5
LT1019CS8-4.5
LT1019CS8-5
LT1019CS8-10
LT1019IS8-2.5
LT1019IS8-5

S8 PART

MARKING

19A25
19A05
19AI2
19AI5
1925
1945
1905
1910
19I25
19I05

2

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AVAILABLE OPTIO S

LT1019

OUTPUT TEMPERATURE

VOLTAGE TEMPERATURE ACCURACY COEFFICIENT TO-5 SO-8 PDIP-8

(V) (

2.5 0 to 70 0.05 5 LT1019ACH-2.5 LT1019ACS8-2.5 LT1019ACN8-2.5

4.5 0 to 70 0.05 5 LT1019ACH-4.5 LT1019ACN8-4.5

5 0 to 70 0.05 5 LT1019ACH-5 LT1019ACS8-5 LT1019ACN8-5

10 0 to 70 0.05 5 LT1019ACH-10 LT1019ACN8-10

°

C) (%) (ppm/°C) H8 S8 N8

0.2 20 LT1019CH-2.5 LT1019CS8-2.5 LT1019CN8-2.5

–40 to 85 0.05 10 LT1019AIS8-2.5

0.2 20 LT1019IS8-2.5 LT1019IN8-2.5

–55 to 125 0.05 10 LT1019AMH-2.5

0.2 25 LT1019MH-2.5

0.2 20 LT1019CH-4.5 LT1019CS8-4.5 LT1019CN8-4.5

–40 to 85 0.2 20 LT1019IN8-4.5

–55 to 125 0.05 10 LT1019AMH-4.5

0.2 25 LT1019MH-4.5

0.2 20 LT1019CH-5 LT1019CS8-5 LT1019CN8-5

–40 to 85 0.05 10 LT1019AIS8-5

0.2 20 LT1019IS8-5 LT1019IN8-5

–55 to 125 0.05 10 LT1019AMH-5

0.2 25 LT1019MH-5

0.2 20 LT1019CH-10 LT1019CS8-10 LT1019CN8-10

–40 to 85 0.2 20 LT1019IN8-10

–55 to 125 0.05 10 LT1019AMH-10

0.2 25 LT1019MH-10

PACKAGE TYPE

LECTRICAL C CHARA TERIST

E

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 15V, I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

TC Output Voltage LT1019C (0°C to 70°C) ● 3 5 5 20 ppm/°C

∆V

OUT

∆V

IN

RR Ripple Rejection 50Hz ≤ f ≤ 400Hz 90 110 90 110 dB

= 0 unless otherwise noted.

OUT

Output Voltage Tolerance 0.02 0.05 0.02 0.2 %

Temperature Coefficient LT1019I (–40°C to 85°C)
(Note 3) LT1019M (–55°C to 125°C)

Line Regulation (Note 4) (V

OUT

ICS

LT1019A LT1019

● 3 10 5 20 ppm/°C

● 5 10 8 25 ppm/°C

+ 1.5V) ≤ VIN ≤ 40V 0.5 3 0.5 3 ppm/V

● 1.0 5 1.0 5 ppm/V

● 84 84 dB

3

LT1019

LECTRICAL C CHARA TERIST

E

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 15V, I

SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

∆V

OUT

∆I

OUT

I

Q

I

SC

e

n

= 0 unless otherwise noted.

OUT

Load Regulation Series 0 ≤ I
Mode (Notes 4, 5) ● 0.08 0.08 mV/mA (Ω)

Load Regulation, 1mA ≤ I
Shunt Mode 2.5V, 4.5V, 5V

Thermal Regulation (Note 7) ∆P = 200mW, t = 50ms 0.1 0.5 0.1 0.5 ppm/mW
Quiescent Current 0.65 1.0 0.65 1.2 mA

Series Mode
Minimum Shunt Current (Note 8) ● 0.5 0.8 0.5 0.8 mA
Minimum Input/Output I

Voltage Differential I
Trim Range LT1019-2.5 ±3.5 ±6 ±3.5 ±6%

Short-Circuit Current 2V ≤ VIN ≤ 35V 15 25 50 15 25 50 mA
Output Connected to GND

Output Voltage Noise 10Hz ≤ f ≤ 1kHz 2.5 4 2.5 4 ppm (RMS)
(Note 10) 0.1Hz ≤ f ≤ 10Hz 2.5 2.5 ppm (P-P)

OUT

10V

≤ 1mA ● 0.9 1.1 0.9 1.1 V

OUT

= 10mA ● 1.3 1.3 V

OUT

LT1019-5 ±3.5 5, –13 ±3.5 5, –13 %
LT1019-10 ±3.5 5, –27 ±3.5 5, –27 %

ICS

LTC1019A LTC1019

≤ 10mA (Note 5) 0.02 0.05 0.02 0.05 mV/mA (Ω)

≤ 10mA (Notes 5, 6)

SHUNT

● 0.1 0.4 0.1 0.4 mV/mA (Ω)

● 0.8 0.8 mV/mA (Ω)

● 1.3 1.5 mA

● 10 10 mA

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.

Note 2: These are high power conditions and are therefore guaranteed
only at temperatures equal to or below 70°C. Input is either floating, tied to
output or held higher than output.

Note 3: Output voltage drift is measured using the box method. Output
voltage is recorded at T
readings is subtracted from the highest and the resultant difference is
divided by (T

Note 4: Line regulation and load regulation are measured on a pulse basis
with low duty cycle. Effects due to die heating must be taken into account
separately. See thermal regulation and application section.

Note 5: Load regulation is measured at a point 1/8" below the base of the
package with Kelvin contacts.

Note 6: Shunt regulation is measured with the input floating. This
parameter is also guaranteed with the input connected (V
0mA ≤ I

– T

MAX

≤ 10mA. Shunt and sink current flow into the output.

SINK

MIN

MIN

).

, 25°C and T

. The lowest of these three

MAX

– V

IN

OUT

) > 1V,

Note 7: Thermal regulation is caused by die temperature gradients created
by load current or input voltage changes. This effect must be added to
normal line or load regulation.

Note 8: Minimum shunt current is measured with shunt voltage held
20mV below the value measured at 1mA shunt current.

Note 9: Minimum input/output voltage is measured by holding input
voltage 0.5V above the nominal output voltage, while measuring

– V

OUT

.

V

IN

Note 10: RMS noise is measured with a single pole highpass filter at 10Hz
and a 2-pole lowpass filter at 1kHz. The resulting output is full-wave
rectified and then integrated for a fixed period, making the final reading an
average as opposed to RMS. A correction factor of 1.1 is used to convert
from average to RMS, and a second correction of 0.88 is used to correct
the nonideal bandpass of the filters.

Note 11: If the part is stored outside of the specified temperature range,
the output may shift due to hysteresis.

4