參數(shù)資料
型號: AD7874BQ
廠商: Analog Devices Inc
文件頁數(shù): 8/16頁
文件大?。?/td> 0K
描述: IC DAS 12BIT 4CH 5V 28-CDIP
標準包裝: 1
類型: 數(shù)據(jù)采集系統(tǒng)(DAS)
分辨率(位): 12 b
采樣率(每秒): 116k
數(shù)據(jù)接口: 并聯(lián)
電壓電源: 雙 ±
電源電壓: ±5V
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 28-CDIP(0.600",15.24mm)
供應商設備封裝: 28-CDIP
包裝: 管件
AD7874
REV. C
–16–
C1388a–5–5/91
SHORTING PLUG OPTIONS
There are seven shorting plug options which must be set before
using the board. These are outlined below:
LK1–LK4
Connects the analog inputs to the buffer amplifi-
ers. The analog inputs may also be connected to a
component grid for signal conditioning.
LK5
Selects either the AD7874 internal clock or an ex-
ternal clock source.
LK6
Selects either the AD7874 internal reference or an
external reference source.
LK7
Connects the AD7874 RD input directly to the
RD
input of SKT8 or to a decoded STRB and
R/W input. This shorting plug setting depends on
the microprocessor, e.g., the TMS32020 and
68000 require a decoded RD signal.
COMPONENT LIST
IC1
AD713 Quad Op Amp
IC2
AD7874 Analog-to-Digital Converter
IC3
MC78L05 +5 V Regulator
IC4
MC79L05 –5 V Regulator
IC5
74HC00 Quad NAND Gate
C1, C3, C5, C7, C9
10
F Capacitors
C2, C4, C6, C8, C10
0.1
F Capacitors
R1, R2
10 k
Pull-Up Resistors
LK1, LK2, LK3
Shorting Plugs
LK4, LK5, LK6
LK7
SKT1, SKT2, SKT3,
BNC Sockets
SKT4, SKT5, SKT6,
SKT7
SKT8
26-Contact (2-Row) IDC Connector
PRINTED
IN
U.S.A.
OUTLINE DIMENSIONS
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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