LTZ1000/LTZ1000A

7

1000afc

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

7V Positive Reference Circuit

–

+

–

+

2N3904

1N4148

1N4148

A2

LT1013

A1

LT1013

1M

1

1

7

5

3

3

4

4

8

8

5

7

6

1k

2

2

0.1μF

0.002μF

0.1μF

400k*

10k

R4

13k

R1

120Ω

R3

70k

R2

70k

R5

1k

ZENER – SENSE

ZENER + SENSE

GROUND

ZENER – FORCE

HEATER RETURN

(TIED TO GROUND)

*PROVIDES TC COMPENSATION, DELETE FOR LTZ1000A

APPROXIMATE CHANGE IN REFERENCE VOLTAGE FOR A 100ppm (0.01%) CHANGE IN RESISTOR VALUES:

R1

R2

R3

R4/R5 RATIO

R(Ω)

0.012Ω

7Ω

7Ω

R = 0.01%

1ppm

0.3ppm

0.2ppm

1ppm

BOTH A1 AND A2 CONTRIBUTE LESS THAN 2μV OF OUTPUT DRIFT OVER A 50°C RANGE

1000 TA06

TYPICAL APPLICATIONS