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PDF DG485 Data sheet ( Hoja de datos )
| Número de pieza | DG485 | |
| Descripción | Octal Analog Switch Array | |
| Fabricantes | Vishay Siliconix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DG485 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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Octal Analog Switch Array
DG485
Vishay Siliconix
FEATURES
D Low On-Resistance: 55 W
D Rail-to-Rail Analog Input Range
D Serial Interface
D Low-Power—PD: 35 nW
D TTL and CMOS Compatible
D Any Combination of 8 SPST to the
Output
D High Speed—tON: 170 ns
BENEFITS
APPLICATIONS
D Low Signal Distortion
D Devices Can Be Chained for System
Expansion
D Reduced Board Space
D Reduced Switch Errors
D Reduced Power Supply
Requirements
D Simple Interfacing
D Audio Switching and Routing
D Audio Teleconferencing
D Data Acquisition and Industrial
Process Control
D Battery Powered Remote Systems
D Automotive, Avionics and ATE
Systems
D Summing Amplifiers
DESCRIPTION
The DG485 is an analog switch array consisting of eight SPST
switches connected to a common output. This device may be
used as an 8-channel multiplexer in serial control applications.
Any, all or none of the eight switches may be closed at any
given time. Combining low on-resistance (rDS(on) 55 W, typ.)
and fast switching (tON: 170 ns, typ.), the DG485 is ideally
suited for data acquisition, process control, communication,
and avionic applications.
serial output (DOUT) allow daisy chaining of multiple arrays for
large systems.
Built on the Vishay Siliconix high voltage silicon gate process
the DG485 has a wide 44-V power supply voltage rating. An
epitaxial layer prevents latchup.
Control data is input serially into the shift register with each
clock pulse. The shift register contents can be latched-in (via
LD) at any point into an octal latch which in turn controls all
switches. RS resets the shift register, forcing all latch inputs to
a low condition (all switches off). The serial input (DIN) and
Each channel conducts equally well in either direction when on
and blocks up to rail-to-rail voltages when off.
For additional information please refer to application note
AN204.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
Dual-In-Line
PLCC and LCC
LD
VL
S4
S3
S2
S1
V+
DIN
CLK
1
2
3
4
5
6
7
8
9
Shift Register
Latches
18 RS
17 GND
16 D
15 S5
14 S6
13 S7
12 S8
11 V–
10 DOUT
Document Number: 70065
S-52433—Rev. E, 06-Sep-99
Top View
3 2 1 20 19
S4 4
S3 5
S2 6
S1 7
V+ 8
Shift Register/Latches
9 10 11 12 13
18 D
17 S5
16 S6
15 S7
14 S8
Top View
www.vishay.com S FaxBack 408-970-5600
5-1
1 page  
DG485
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
rDS(on) vs. VD and Unipolar Power Supply Voltage
400
V– = 0 V
350 VL = 5 V
IS = –5 mA
300
250 V+ = 5 V
200
150
100
50
0
0
60
40
20
0
–20
–40
8V
10 V
12 V
15 V
20 V
2 4 6 8 10 12 14 16 18 20
VD – Drain Voltage (V)
Channel On/Off Leakage Currents
vs. Analog Voltage
V+ = 15 V
V– = –15 V
VL = 5 V
IS(off)
ID(off)
ID(on)
–60
–80
–15
3.0
–10 –5
0
5 10
VD or VS – Drain or Source Voltage (V)
Switching Threshold
vs. Power Supply Voltage and VL
15
2.5 5 V
6V
2.0
VL = 7 V
1.5
4V
1.0
0.5
rDS(on) vs. VD and Temperature
100
90
80
70
60 125_C
50
40 25_C
30
V+ = 15 V
20 V– = –15 V
VL = 5 V
10 IS = –5 mA
–55_C
0
–15
–10
–5
0
5 10 15
VD – Drain Voltage (V)
1 mA
100 nA
10 nA
Channel On/Off Leakage Currents
vs. Temperature
V+ = 15 V
V– = –15 V
VL = 5 V
VS or VD = – 14 V
1 nA
100 pA
ID(on)
IS(off)
10 pA
1 pA
ID(off)
0.1 pA
0.01 pA
–50 –30 –10 10 30 50 70
Temperature (_C)
90 110 130
–140
–120
–100
–80
–60
–40
–20
RF Characteristics
OIRR
V+ = 15 V
V– = –15 V
VL = 5 V
See Figures 9, 10
XTALK
0
5 6 7 8 9 10 11 12 13 14 15
V+ Supply (V)
0
1k
10 k 100 k
1M
f – Frequency (Hz)
10 M
Document Number: 70065
S-52433—Rev. E, 06-Sep-99
www.vishay.com S FaxBack 408-970-5600
5-5
5 Page 
APPLICATIONS
R
V1
R
V2
R
V8
DG485
RF
–
+
VOUT
FIGURE 14. Summing Node Mixer
DG485
Vishay Siliconix
DG485
+
–
CH
FIGURE 15. Multiplexing, Sampling Application
S1 S2
S8
Switch Array
DG485
D
8085
SOD
ALE
Data Bus
8212
DIN
(8)
Decoder
(8) Address Bus
8205
Octal Latch
DOUT
S/R
LD CLK RS
WR
R/S
FIGURE 16. Direct Serial Interface (8085)
To Next
Switch
Array
Document Number: 70065
S-52433—Rev. E, 06-Sep-99
www.vishay.com S FaxBack 408-970-5600
5-11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet DG485.PDF ] | |
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