LT1009IDR datasheet(4/22 Pages) TI1

Part #	LT1009IDR

Description	2.5-V INTEGRATED REFERENCE CIRCUIT

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ELECTRICAL CHARACTERISTICS

Maximum V

Z

Minimum V

Z

V

at I = 1 mA

Z(dev)

Z

D

T

A

D

T

A

× 10

6

V

Z(dev)

V at 25°C

Z

=

| V |

a

Z

ppm

°C

70°C

× 10

6

4 mV

2500 mV

| V | =

a

Z

ppm

°C

»

23

LT1009

SLVS013N – MAY 1987 – REVISED MAY 2009................................................................................................................................................................. www.ti.com

at specified free-air temperature

LT1009C

LT1009I

PARAMETER

TEST CONDITIONS

TA

(1)

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

D/PW package

2.49

2.5

2.51

2.49

2.5

2.51

25°C

LP package

2.495

2.5

2.505

2.495

2.5

2.505

VZ

Reference voltage

IZ = 1 mA

V

D/PW package

2.485

2.515

2.475

2.525

Full range

LP package

2.491

2.509

2.48

2.52

VF

Forward voltage

IF = 2 mA

25°C

0.4

1

0.4

1

V

IZ = 1 mA,

125

VADJ = GND to VZ

Adjustment range

25°C

mV

IZ = 1 mA,

45

VADJ = 0.6 V to VZ – 0.6 V

Change in reference

D/PW package

5

15

ΔVZ(temp)

voltage with

Full range

mV

LP package

4

15

temperature

Average temperature

0°C to 70°C

15

25

15

25

ppm/

αV

Z

coefficient of

IZ = 1 mA, VADJ = open

°C

–40°C to 85°C

20

35

reference voltage(2)

25°C

2.6

10

2.6

6

Change in reference

ΔVZ

IZ = 400 µA to 10 mA

mV

voltage with current

Full range

12

10

Long-term change in

ppm/

ΔVZ/Δt

IZ = 1 mA

25°C

20

reference voltage

khr

25°C

0.3

1

0.3

1

ZZ

Reference impedance IZ = 1 mA

Ω

Full range

1.4

(1)

Full range is 0°C to 70°C for the LT1009C and –40°C to 85°C for the LT1009I.

(2)

The deviation parameter VZ(dev) is defined as the difference between the maximum and minimum values obtained over the

recommended operating temperature range, measured at IZ = 1 mA. The average full-range temperature coefficient of the reference

voltage (

αV

Z) is defined as:

αV

Z can be positive or negative, depending upon whether the minimum VZ or maximum VZ, respectively, occurs at the lower

temperature.

For example, at IZ = 1 mA, maximum VZ = 2501 mV at 30°C, minimum VZ = 2497 mV at 0°C, VZ = 2500 mV at 25°C, ΔTA = 70°C for

LT1009C:

Because minimum VZ occurs at the lower temperature, the coefficient in this example is positive.

4

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