|
OPA2354AIDGKRG4 Datasheet, PDF (12/33 Pages) Texas Instruments – 250MHz, Rail-to-Rail I/O, CMOS OPERATIONAL AMPLIFIERS | |||
|
◁ |
OPA354
OPA2354
OPA4354
SBOS233E â MARCH 2002â REVISED MAY 2009
OUTPUT DRIVE
The OPA354âs output stage can supply a continuous
output current of ±100mA and still provide approximately
2.7V of output swing on a 5V supply, as shown in Figure 2.
For maximum reliability, it is not recommended to run a
continuous DC current in excess of ±100mA. Refer to the
typical characteristic curve Output Voltage Swing vs
Output Current. For supplying continuous output currents
greater than ±100mA, the OPA354 may be operated in
parallel, as shown in Figure 3.
The OPA354 will provide peak currents up to 200mA,
which corresponds to the typical short-circuit current.
Therefore, an on-chip thermal shutdown circuit is provided
to protect the OPA354 from dangerously high junction
temperatures. At 160°C, the protection circuit will shut
down the amplifier. Normal operation will resume when the
junction temperature cools to below 140°C.
R1
10kâ¦
R3
VIN 10kâ¦
+
â
1V In = 100mA
Out, as Shown
C1
50pF
R2
1kâ¦
1µF
V+
OPA354
Vâ
R4
1kâ¦
+
V1
â 5V
RSHUNT
1â¦
Laser Diode
www.ti.com
R1
100kâ¦
R3
100kâ¦
+
â
2V In = 200mA
Out, as Shown
R2
10kâ¦
C1
200pF
+5V
1µF
R5
1â¦
OPA2354
R6
1â¦
OPA2354
R4
10kâ¦
RSHUNT
1â¦
Laser Diode
Figure 3. Parallel Operation
VIDEO
The OPA354 output stage is capable of driving standard
back-terminated 75⦠video cables, as shown in Figure 4.
By back-terminating a transmission line, it does not exhibit
a capacitive load to its driver. A properly back-terminated
75⦠cable does not appear as capacitance; it presents
only a 150⦠resistive load to the OPA354 output.
Figure 2. Laser Diode Driver
Video
In
+2.5V
+5V
75â¦
OPA354
+2.5V
604â¦
604â¦
75â¦
Video
Output
Figure 4. Single-Supply Video Line Driver
12
|
▷ |