4-150

Models 694, 698, 699

MECHANICAL

Lead Plating

60/40 Tin Lead (Dipped)

Lead Material

Copper Alloy

Substrate Material

Alumina

Resistor Material

Nichrome

Body Material

Molded Epoxy

R

18

16

R

R

17

14

Model 698

-1 Circuit - Bussed Resistors

18

16

R

17

14

Model 698

Model 699

Model 699

14

8

RR

R

R

-3 Circuit - Isolated Resistors

14

8

R2R

4R 8R

-6 Circuit - Binary

14

8

-7 Circuit - Decade

- 3 Circuit - Isolated Resistors

Model 694

SCHEMATICS

Note:

Model 694, -6 & -7 circuits available only in accuracy code B: 0.1% absolute, 0.1% ratio.

ACCURACY CODES

Code

A

B

D

F

Absolute Resistance Tolerances, at 25°C

0.1%

0.1%

0.5%

1.0%

Ratio

0.05%

0.1%

0.1%

0.5%

Temperature Coefficient of Resistance

±50ppm/°C

Temperature Coefficient of Resistance, Tracking

±5ppm/°C