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參數(shù)資料
| 型號(hào)： | CA3256E |
| 廠商： | INTERSIL CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 25MHz, BiMOS Analog Video Switch and Amplifier |
| 中文描述： | 5-CHANNEL, AUDIO/VIDEO SWITCH, PDIP18 |
| 封裝： | PLASTIC, DIP-18 |
| 文件頁(yè)數(shù)： | 6/11頁(yè) |
| 文件大小： | 389K |
| 代理商： | CA3256E |
8-6
buffer amplifier. The T-switch, together with the input
impedance of the buffer, is typically 10k
, and has an inser-
tion loss of approximately 0.8dB. The T-switch was designed
to handle up to 3V
P-P
input signal with low distortion. The
T-switches of the CA3256 conform to a break-before-make
format; hence, shorting to ground is eliminated.
The amplifier is programmable for gain and, typically, can
provide a gain of 1 into a 75
load or a gain of 5 into a 1k
load. The maximum output signal swing with linearity is
greater than 5V
P-P
for (V+ to V-) greater than or equal to
12V, while the maximum output current is approximately
20mA. The amplifier has base-current compensation to
reduce offset and a temperature compensated 5V zener ref-
erenced bias. Other features include LED-selector indicators
for channels 1 through 4. The fifth channel is independently
selectable for use as a separate input or output in parallel
with any on channel, and may be used as a monitor, or for
pass-through, signal summing, or parallel distribution.
In the application, the user has the option to specify V- = -5V
for the switch and a ground reference for the amplifier input
and output. Alternatively, the CA3256 may be used with a
single +12V supply. The logic select for channels 1 through 4
is controlled by the A, B and Inhibit lines with ground to V+
logic switching. The logic threshold is approximately
(V+ - V-)/2 referenced to ground. DC coupling may also be
used at the output (when V- is returned to a -5V supply). For
the circuit of Figure 3, AC coupling is used at the output and
input. The switching bias arrangement shown provides for
stable bias across each switch when in the off position to
minimize transients when the input is switched.
Typical Applications
TG-1
10K
V- +5V
BIAS
REG
8
-5V
V-
+7V TO +12V
V+
100K
100K
A
B
ENABLE
CHANNEL
1-4
4.7K
4.7K
4.7K
GND
1K
10K
LED INDICATOR CHANNEL 4
LED INDICATOR CHANNEL 3
LED INDICATOR CHANNEL 2
LED INDICATOR CHANNEL 1
AMPLIFIER
TO CABLE
OUTPUT
OUTPUT
AMP
14
5
CHANNEL 1
INPUT
CHANNEL 5
INPUT/
OUTPUT
2 OF 5
INPUTS
SHOWN
TG-2
TG-3
V
LED
75
4.7K
C
SELECT
CHANNEL
5
WHERE AMPLIFIER GAIN:
R
F
= 9k
i.e., FOR A
V
= 1.8
+
9
15
1
-
R
F
75
12
2
3
17
1
3
TG-4
LLC
ENABLE
AND
CHAN 1-4
SELECT
4
TG-5
13
6
16
18
7
4
2
AV
1
RF
1K
+
10K
+
x
0.9
=
11
10
SELECT
CHANNEL
1-4
100K
OUT
FIGURE 2. TYPICAL APPLICATION WITH DIRECT-COUPLED OUTPUT AND V- = -5V (DIP PINOUT)
CA3256
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CA3256M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| CA3257E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| CA3258E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| CA32593-138 | 制造商:ITT Interconnect Solutions 功能描述:CA32593-138 - Bulk |
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