Datasheet
INPUT RANGE
0 6020 40 100
Time( s)m
-46.0
-46.5
-47.0
-47.5
-48.0
-48.5
-50.5
V
oltage(V)
80
-49.0
V-
V
f=1kHz
IN
V
R =50k
OUT
S
W
T =+25 C°
A
V
R =0
OUT
S
W
-49.5
-50.0
0 6020 40 100
Time( s)m
50.5
50.0
49.5
49.0
48.5
48.0
47.0
Voltage(V)
80
47.5
V+
V
f=1kHz
IN
V
R =50k
OUT
S
W
T =+25 C°
A
V
R =0
OUT
S
W
R
10kW
F
R
4.8kW
L
R
S
OPA454
V+=+50V
V = 50V- -
V
IN
V
OUT
OUTPUT RANGE
0 6020 40 100
Time( s)m
-46.0
-46.5
-47.0
-47.5
-48.0
-48.5
-50.5
V
oltage(V)
80
-49.0
V-
V
f=1kHz
IN
V
R =50k
OUT
S
W
T =+25 C°
A
V
R =0
OUT
S
W
-49.5
-50.0
OPA454
SBOS391A – DECEMBER 2007 – REVISED DECEMBER 2008 .......................................................................................................................................
www.ti.com
The OPA454 is specified to give linear operation with
input swing to within 2.5V of either supply. Generally,
a gain of +1 is the most demanding configuration.
Figure 61 and Figure 62 show output behavior as the
input swings to within 0V of the rail, using the circuit
shown in Figure 64 . Figure 63 shows the behavior
with an input signal that swings beyond the specified
input range to within 1V of the rail, also using the
circuit in Figure 64 . Notice that the beginning of the
phase reversal effect may be reduced by inserting
series resistance (R
S
) in the connection to the
positive input. Note that V
OUT
does not swing all the
way to the opposite rail.
Figure 63. Output Voltage With Input Voltage
Down To (V – ) + 1V
Figure 61. Output Voltage With Input Voltage Up
Figure 64. Input Range Test Circuit
To V+
The OPA454 is specified to swing to within 1V of
either supply rail with a 49k Ω load while maintaining
excellent linearity. Swing to the rail decreases with
increasing output current. The OPA454 can swing to
within 2V of the negative rail and 3V of the positive
rail with a 1.88k Ω load. The typical characteristic
curve, Output Voltage Swing vs Output Current
(Figure 11 ), shows this behavior in detail.
Figure 62. Output Voltage With Input Voltage
Down To V –
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