Figure 4 – Subcircuit Schematics
Input Circuit
AGND
Output Circuit
AGND
DGND
MINV, LINV Input Circuit
AGND
10 kW
V
IN
V
R
MINV
LINV
1.3 V
Data Out
16 kW
V
EE
V
EE
Figure 5 – Clock Input
AGND
Figure 6 – Burn-In Circuit (42-lead DIP Package only)
V
EE
1N4736
V
REF
R4
R4
2.0 V
CLK
V
RBF
R3
R1 R1 R1 R1 R1 R1 R1 R1
CLK
13 kW
V
EE
13 kW
1.3 V
D0
D1
V
IN
R2
D2
V
IN
D3
D4
D5
D6
CLK
CLK
R2
R2
D7
CLK
CLK
DGND
AGND
V
RTF
V
EE
LINV
MINV
R2
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.
R
1
= 50
W
1/4 Watt CC 5%
R
2
= 1 kW 1/4 Watt CC 5%
R
3
= 6.5
W
1/4 Watt CC 5%
R
4
= 6.5
W
1/2 Watt CC 5%
V
REF
= 2.0 Volts
V
EE
= 6.6 Volts
2.0 V
SPT7725
9
8/17/01
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
