AD7874
SH O RTING P LUG O P TIO NS
CO MP O NENT LIST
T here are seven shorting plug options which must be set before
using the board. T hese are outlined below:
IC1
IC2
IC3
IC4
AD713 Quad Op Amp
AD7874 Analog-to-Digital Converter
MC78L05 +5 V Regulator
MC79L05 –5 V Regulator
74HC00 Quad NAND Gate
10 µF Capacitors
0.1 µF Capacitors
10 kΩ Pull-Up Resistors
Shorting Plugs
LK1–LK4
Connects the analog inputs to the buffer amplifi-
ers. T he analog inputs may also be connected to a
component grid for signal conditioning.
IC5
C1, C3, C5, C7, C9
C2, C4, C6, C8, C10
R1, R2
LK1, LK2, LK3
LK4, LK5, LK6
LK7
SKT 1, SKT 2, SKT 3,
SKT 4, SKT 5, SKT 6,
SKT 7
LK5
LK6
LK7
Selects either the AD7874 internal clock or an ex-
ternal clock source.
Selects either the AD7874 internal reference or an
external reference source.
Connects the AD7874 RD input directly to the
RD input of SKT 8 or to a decoded STRB and
R/W input. T his shorting plug setting depends on
the microprocessor, e.g., the T MS32020 and
68000 require a decoded RD signal.
BNC Sockets
SKT 8
26-Contact (2-Row) IDC Connector
O UTLINE D IMENSIO NS
D imensions shown in inches and (mm).
P lastic (N-28)
SO IC (R-28)
Cer dip (Q -28)
LCCC (E-28A)
1
0.100 (2.54)
0.055 (1.40)
0.045 (1.14)
0.075
(1.91)
REF
0.064 (1.63)
0.028 (0.71)
0.022 (0.56)
28
NO. 1 PIN INDEX
0.050 ± 0.005
(1.27 ± 0.13)
BOTTOM VIEW
0.040 x 45°
(1.02 x 45°)
REF 3 PLCS
0.020 x 45°
(0.51 x 45°) REF
0.458 (11.63) 2
0.442 (11.23)
NOTES
1. THIS DIMENSION CONTROLS THE OVERALL PACKAGE
THICKNESS.
2. APPLIES TO ALL FOUR SIDES.
3. ALL TERMINALS ARE GOLD PLATED.
–16–
REV. C
ADI [ ADI ]
