- 您现在的位置：买卖IC网 > PDF目录384930 > SSM2404P (ANALOG DEVICES INC) Quad Audio Switch PDF资料下载
参数资料
| 型号： | SSM2404P |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | Quad Audio Switch |
| 中文描述： | QUAD 1-CHANNEL, SGL POLE SGL THROW SWITCH, PDIP20 |
| 封装： | MINI, PLASTIC, DIP-20 |
| 文件页数： | 6/8页 |
| 文件大小： | 318K |
| 代理商： | SSM2404P |
SSM2404
REV. B
–6–
SSM2404 can also be configured as a 4:1 multiplexer, or by
using additional packages, as 8:1 or 16:1 and up. T he break-
before-make feature is guaranteed from part to part allowing
such multiple-package applications.
As Figure 20 shows, the SSM2404 is easy to use, and no ad-
ditional devices are needed. T he load resistors are recommended
for improved OFF-isolation and charge injection. T he ON
resistance of the switch is only 28
typically, which causes very
little signal attenuation even with a load resistor.
TOP VIEW
(Not to Scale)
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
SW1
SW4
SW2
SW3
IN1
OUT1
DGND
SW1 CONTROL
SW2 CONTROL
OUT2
IN2
IN4
OUT4
+12V
SW4 CONTROL
SW3 CONTROL
9
10
12
11
R
L
R
L
R IS OPTIONAL
R
L
–12V
OUT3
IN3
R
L
SW
CONTROL
SWITCH
STATE
0
1
OFF
ON
Figure 20. Basic Circuit Configuration
OPT IMIZING PE RFORMANCE
As the performance curves show, the switch is optimized for
high impedance loads. T he distortion performance is at its best
when the switch has a load impedance of 100 k
or greater as
shown in Figure 1. However, even at lower values of load resis-
tances, the 1 kHz distortion performance is still excellent,
0.006% for a 10 k
load. T he main trade-off with T HD is
OFF-isolation and crosstalk. T his is shown in Figures 10 and
11, again with two different load conditions. As these graphs
show, the 10 k
load yields approximately a 16 dB improve-
ment in both characteristics.
T hus, the optimum operating point depends on the most criti-
cal parameters. When T HD is critical then high load imped-
ances should be used; however, when crosstalk and OFF-
isolation are critical, lower impedances on the order of 10 k
should be used. An additional benefit of using the smaller
load resistor is that any charge injected onto the output will be
shunted to ground through the resistor. If improved OFF-
isolation is needed, the SSM2404 dual audio switch should be
considered with its excellent 120 dB OFF-isolation at 20 kHz.
It is important that all of the AGND pins be connected to the
system analog ground. T hese pins isolate the input and output
of each switch. Without connecting these pins, the OFF-
isolation will degrade significantly.
10
90
100
0%
10V
5V
0
5V
0
ANALOG
OUTPUT
V
A (OUT)
LOGIC
INPUT
V
INL/INH
5ms/div
Figure 17. t
ON
/t
OFF
Switching Response
10
90
100
0%
50mV
50
μ
s
OPEN
(SWITCH OFF)
CLOSED
(SWITCH ON)
Figure 18. Switch OFF-to-ON Transition (R
L
= 5 k
)
10
90
100
0%
50mV
50
μ
s
CLOSED
(SWITCH ON)
OPEN
(SWITCH OFF)
Figure 19. Switch ON-to-OFF Transition (R
L
= 5 k
)
APPLICAT IONS INFORMAT ION
T he SSM2404 integrates four analog CMOS switches with
guaranteed “break-before-make” operation to provide high
quality audio switching. Each switch has complementary
N-channel and P-channel MOSFET s to allow the analog input
voltage range to include the positive and negative rails and
improve linearity. In addition, the topology permits fully
bilateral switching. When using the SSM2404 there is full
flexibility in configuring the switches. For example, they can be
used individually as shown in Figure 20, or as a double-pole,
double-throw (DPDT ) switch, which is explained later. T he
相关PDF资料 |
PDF描述 |
|---|---|
| SSM2404S | Quad Audio Switch |
| SSM-2475 | Single Audio Amplifier |
| SSM-2275 | Single Audio Amplifier |
| SSM2475 | Single Audio Amplifier |
| SSM2275 | Single Audio Amplifier |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SSM2404S | 制造商:Analog Devices 功能描述:Analog Switch Quad SPST 20-Pin SOIC W 制造商:Analog Devices 功能描述:Multiplexer IC |
| SSM2404S-REEL | 制造商:Analog Devices 功能描述:Analog Switch Quad SPST 20-Pin SOIC W T/R |
| SSM2404SZ | 制造商:Analog Devices 功能描述:Multiplexer IC |
| SSM2404SZ-REEL | 制造商:Analog Devices 功能描述:Analog Switch Quad SPST 20-Pin SOIC W T/R |
| SSM24-10 | 制造商:SYSTEMSENSOR 制造商全称:SYSTEMSENSOR 功能描述:Alarm Bells |
发布紧急采购，3分钟左右您将得到回复。