9

8/17/01

SPT7725

Figure 4 – Subcircuit Schematics

AGND

Input Circuit

AGND

–1.3 V

MINV

LINV

10 kW

16 kW

MINV, LINV Input Circuit

Output Circuit

AGND

Data Out

DGND

Figure 5 – Clock Input

AGND

–1.3 V

13 kW

13 kW

CLK

CLK

Figure 6 – Burn-In Circuit (42-lead DIP Package only)

R2

R3

1N4736

R4

R4

LINV

MINV

R2

–2.0 V

R2

R2

CLK

CLK

–2.0 V

R1 R1

R1 R1 R1 R1 R1

R1

D0

D1

D2

D3

D4

D5

D6

D7

CLK

CLK

EVALUATION BOARDS

The EB7725 evaluation board is available to aid designers

in demonstrating the full performance of the SPT7725.

This board includes a voltage reference circuit, clock

driver circuit, output data latches, and an on-board recon-

struction of the digital data. An application note describing

the operation of this board, as well as application tips, is

also available. Contact the factory for price and delivery.