參數(shù)資料
型號(hào): AD7874SQ
廠商: ANALOG DEVICES INC
元件分類(lèi): ADC
英文描述: LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
中文描述: 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP28
封裝: 0.600 INCH, HERMETIC SEALED, CERDIP-28
文件頁(yè)數(shù): 16/16頁(yè)
文件大?。?/td> 414K
代理商: AD7874SQ
AD7874
REV. C
–16–
C
SHORT ING PLUG OPT IONS
T here are seven shorting plug options which must be set before
using the board. T hese are outlined below:
LK 1–LK 4
Connects the analog inputs to the buffer amplifi-
ers. T he analog inputs may also be connected to a
component grid for signal conditioning.
LK 5
Selects either the AD7874 internal clock or an ex-
ternal clock source.
LK 6
Selects either the AD7874 internal reference or an
external reference source.
LK 7
Connects the AD7874
RD
input directly to the
RD
input of SK T 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.
COMPONE NT LIST
IC1
IC2
IC3
IC4
IC5
C1, C3, C5, C7, C9
C2, C4, C6, C8, C10
R1, R2
LK 1, LK 2, LK 3
LK 4, LK 5, LK 6
LK 7
SK T 1, SK T 2, SK T 3,
SK T 4, SK T 5, SK T 6,
SK T 7
SK T 8
AD713 Quad Op Amp
AD7874 Analog-to-Digital Converter
MC78L05 +5 V Regulator
MC79L05 –5 V Regulator
74HC00 Quad NAND Gate
10
μ
F Capacitors
0.1
μ
F Capacitors
10 k
Pull-Up Resistors
Shorting Plugs
BNC Sockets
26-Contact (2-Row) IDC Connector
P
OUT LINE DIME NSIONS
Dimensions shown in inches and (mm).
Plastic (N-28)
Cerdip (Q-28)
SOIC (R-28)
LCCC (E -28A)
0.458 (11.63)
2
0.442 (11.23)
BOTTOM VIEW
NO. 1 PIN INDEX
0.055 (1.40)
0.045 (1.14)
0.028 (0.71)
0.022 (0.56)
0.050
±
0.005
(1.27
±
0.13)
0.040 x 45
°
(1.02 x 45
°
)
REF 3 PLCS
0.020 x 45
°
(0.51 x 45
°
) REF
0.100 (2.54)1
0.064 (1.63)
NOTES
1. THIS DIMENSION CONTROLS THE OVERALL PACKAGE
THICKNESS.
2. APPLIES TO ALL FOUR SIDES.
3. ALL TERMINALS ARE GOLD PLATED.
28
0.075
(1.91)
REF
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