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参数资料
| 型号： | IH401A |
| 厂商： | INTERSIL CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | QUAD Varafet Analog Switch |
| 中文描述： | QUAD 1-CHANNEL, SGL POLE SGL THROW SWITCH, CDIP16 |
| 封装： | CERDIP-16 |
| 文件页数： | 3/5页 |
| 文件大小： | 40K |
| 代理商： | IH401A |
14-3
Applications
IH401A Family
In general, the IH401A family can be used in any application
formally using a JFET/isolation diode combination (2N4391
or similar). Like standard FET circuits, the IH401A requires a
translator for normal analog switch function. The translator is
used to boost the TTL input signals to the
±
15V analog
supply levels which allow the IH401A to handle
±
10V analog
signals. A typical simple PNP translator is shown in Figure 4.
Although this simple PNP circuit represents a minimum of
components, it requires open collector TTL input and t
(OFF)
is limited by the collector load resistor (approximately 1.5
μ
s
for 10k
). Improved switching speed can be obtained by
increasing the complexity of the translator stage.
A translator which overcomes the problems of the simple
PNP stage is the Harris IH6201 (See Note). This translator
driving an IH401A varafet produces the following typical
features:
t
ON
time of approx. 200ns
t
OFF
time of approx. 80ns
NOTE: The IH6201 is a dual translator (two independent translators
per package) constructed from monolithic CMOS technology.
The schematic of one-half IH6201, driving one-fourth of an
IH401A, is shown in Figure 5.
A very useful feature of this system is that one-half of an
IH6201 and one-half of an IH401A can combine to make a
SPDT switch, or an IH6201 plus an IH401A can make a dual
SPDT analog switch. (See Figure 8)
Test Circuits
FIGURE 1. SWITCHING TIME TEST CIRCUIT AND WAVEFORMS
FIGURE 2. ANALOG INPUT VOLTAGE RANGE TEST CIRCUIT
FIGURE 3. CHARGE INJECTION TEST CIRCUIT
-15V
+15V
STROBE
INPUT
SIGNAL
+5V
V
OUT
-15V
1k
+15V
0V
-15V
10%
+5V
t
ON
90%
90%
-5V
0V
0V
10%
10%
t
OFF
t
OFF
t
ON
90%
-5V SIGNAL
+5V SIGNAL
STROBE INPUT
1k
V
IN
V
OUT
+15V
f = 1kH
C = 0.01
μ
F
V
OUT
0V
-15V
FIGURE 4. TYPICAL SIMPLE PNP TRANSLATOR
0V
+15V
R
L
1/4 OF IH401A
FROM TTL OPEN
COLLECTOR LOGIC
ANALOG
SIGNALS IN
ANALOG
OUT
10k
+15V
-15V
10k
break before
make switch
TTL compatible strobing levels of
I
D(ON)
+ I
S(ON)
typically 20pA up to
±
10V analog
signals
I
D(OFF)
or I
S(OFF)
typically 20pA
Quiescent current drain of approx. 100nA in either
“ON” or “OFF” case
0.4V
2.4V
IH401A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IH401A WAF | 制造商:Harris Corporation 功能描述: |
| IH41 | 制造商:Thomas Betts 功能描述:Exact Equal/ 1-5 Days |
| IH4-1 | 制造商:Thomas & Betts 功能描述:Universal Recessed Box And Cover |
| IH4-1-LM | 制造商:Thomas & Betts 功能描述:Universal Device Boxes And Covers |
| IH4-2 | 制造商:Thomas & Betts 功能描述:Universal Recessed Box And Cover |
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