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參數資料
| 型號： | SP1404BW |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | HIGH VOLTAGE INTERFACE CIRCUIT |
| 中文描述： | 高壓接口電路 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 70K |
| 代理商： | SP1404BW |
SP1404BW, D3702
1
DS3139-2.0
SP1404BW
HIGH VOLTAGE INTERFACE CIRCUIT
The SP1404 is a bipolar integrated circuit comprising five
individual digital current amplifier circuits. Each circuit accepts
a logic input from TTL, CMOS or a similar source and drives a
high-current load at the output. The outputs are capable of
withstanding high negative voltages in the ‘off’ state, making
the SP1404 particularly suited to telecommunications
applications.
CIRCUIT DESCRIPTION (Fig.2)
The SP1404 operates as a power amplifier interfacing from
a voltage-level sensitive input to a high-current output switch.
The input threshold is TTL-compatible, with a low input current
requirement enabling one standard TTL output to drive many
interfaces. The low input current requirement also makes it
possible to use series current-limiting resistors to protect the
SP1404 inputs.
Each element of the device performs as inverting function,
i.e. a low voltage level on the input causes a high current in the
output. If the input is left open-circuit, the output will be off and
the output current will be zero.
The isolation of the integrated circuit is biased to the more
negative of the two earth points by diodes D1 and D2 so that
differences of up to (V
CC
- 1) volts can be tolerated between the
‘noisy’ exchange earth and the ‘quiet’ electronic earth.
ABSOLUTE MAXIMUM RATINGS
Storage temperature
Chip operating temperature
Ambient temperature (I
OUT
= 50mA)
Load current
Voltage between output and ‘noisy earth’
V
CC
to output voltage
V
CC
to electronic earth
Input voltage
-55
°
C to +175
°
C
+150
°
C
+85
°
C
80mA
-65V
75V
7V
V
CC
+ 1V
Value
Characteristic
Units
Conditions
Min.
Typ.
Max.
Input current
-20
μ
A
μ
A
V
μ
A
mA
mA
mW
V
IN
= 0V
V
IN
= V
V
IN
= 0.8V, I
OUT
= 50mA
V
IN
= 2V, V
OUT
= -60V
V
IN
= 0.8V
V
CC
= 5V, all inputs low
V
= 5V, all inputs low
all outputs I
OUT
= 50mA
Output voltage
Output current (Off state)
Output current (On state)
V
supply current
Total power dissipation
1.5
100
50
80
30
450
ELECTRICAL CHARACTERISTICS
Test conditions (unless otherwise stated):
Temperature range = 0
°
C to +70
°
C, V
CC
= +5V
±
0.5V
NC
OUTPUT 1
OUTPUT 2
OUTPUT 3
OUTPUT 4
OUTPUT 5
0V ELECTRONIC
14
8
7
1
+V
CC
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
0V EXCHANGE
DP14
Figure 1: Pin connections (viewed from underside)
BIAS CHAIN
FOR ALL 5
ELEMENTS
0V
EXCHANGE
D2
SUBSTRATE
OUTPUT
D1
SUBSTRATE
0V
ELECTRONIC
INPUT
+VCC
Figure 2: Circuit diagram of one element
ADVANCE INFORMATION
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