參數(shù)資料
型號: DG538ADN-T1-E3
廠商: Vishay Siliconix
文件頁數(shù): 6/17頁
文件大?。?/td> 0K
描述: IC AMP/VIDEO/MUX LP 4/8CH 28PLCC
標準包裝: 1,000
功能: 視頻多路復用器
電路: 2 x 4:1
導通狀態(tài)電阻: 90 歐姆
電壓電源: 單/雙電源
電壓 - 電源,單路/雙路(±): 10 V ~ 18 V,±10 V ~ 15 V
電流 - 電源: 600µA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-LCC(J 形引線)
供應商設備封裝: 28-PLCC(11.51x11.51)
包裝: 帶卷 (TR)
DG534A/538A
Vishay Siliconix
www.vishay.com
14
Document Number: 70069
S-05734—Rev. G, 29-Jan-02
PIN DESCRIPTION
Pin Number
Symbol
DG534ADJ
DG538A
Description
DA
2
Analog Output/Input
V+
3
Positive Supply Voltage
SA1
4
Analog Input/Output
SA2
6
Analog Input/Output
SA3
8
Analog Input/Output
SA4
10
Analog Input/Output
4/2
7
4 x 1 or 2 x 2 Select
8/4
11
8 x 1 or 4 x 2 Select
RS
8
12
Reset
WR
9
13
Write command that latches A, EN
A0, A1, A2
11, 10, –
16, 15, 14
Binary address inputs that determine which channel(s) is/are connected to the out-
put(s)
EN
12
17
Enable. Input/Output, if EN = 0, all channels are open
I/O
13
18
Input/Output control. Used to write to or read from the address latches
VL
14
19
Logic Supply Voltage, usually +5 V
SB4
20
Analog Input/Output
SB3
22
Analog Input/Output
SB2
15
24
Analog Input/Output
SB1
17
26
Analog Input/Output
V–
18
27
Negative Supply Voltage
DB
19
28
Analog Output/Input
GND
1, 5, 16
1, 5, 7, 9, 21, 23, 25
Analog and Digital Grounds. All grounds should be connected externally to optimize
dynamic performance
APPLICATIONS
Device Description
The DG534A/538A D/CMOS wideband multiplexers offer
single-ended or differential functions. A 8/4 or 4/2 logic input
pin selects the single-ended or differential mode.
To meet the high dynamic performance demands of video,
high definition TV, digital data routing (in excess of 100 Mbps),
etc., the DG534A/538A are fabricated with DMOS transistors
configured in ‘T’ arrangements with second level ‘L’
configurations (see Functional Block Diagram).
Use of DMOS technology yields devices with very low
capacitance and low rDS(on). This directly relates to improved
high frequency signal handling and higher switching speeds,
while maintaining low insertion loss figures. The ‘T’ and ‘L’
switch configurations further improve dynamic performance
by greatly reducing crosstalk and output node capacitances.
The
DG534A/DG538A
are
improved
pin-compatible
replacements for the non-A versions. Improvements include:
higher current readback drivers, readback of the EN bit,
latchup protection
Frequency Response
A single multiplexer on-channel exhibits both resistance
[rDS(on)] and capacitance [CS(on)].
This RC combination
causes a frequency dependent attenuation of the analog
signal. The –3-dB bandwidth of the DG534A/538A is typically
500 MHz (into 50
W). This figure of 500 MHz illustrates that the
switch-channel cannot be represented by a simple RC
combination. The on capacitance of the channel is distributed
along the on-resistance, and hence becomes a more complex
multi-stage network of R’s and C’s making up the total rDS(on)
and CS(on).
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