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OPA445BM Datasheet, PDF (7/25 Pages) Texas Instruments – High Voltage FET-Input OPERATIONAL AMPLIFIER | |||
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www.ti.com
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C and VS = ±40V, unless otherwise noted.
MAXIMUM POWER DISSIPATION
vs TEMPERATURE
0.8
No Heat Sink
0.7
0.6
Plastic DIP
TOâ99
0.5
0.4
0.3
0.2
TJ (max)
0.1 TOâ99: 150_ C
DIP, SO: 125_C
0
SOâ8
SurfaceâMount
(non PowerPAD)
â50 â25
0
25
50
75 100 125
Temperature (_C)
90
80
70
60
50
40
30
20
10
0
1k
MAXIMUM OUTPUT VOLTAGE SWING
vs FREQUENCY
Maximum output
without slewârate
induced distortion.
10k
100k
1M
Frequency (Hz)
SMALLâSIGNAL STEP RESPONSE
G = 1, CL = 100pF
OPA445
SBOS156B â MARCH 1987 â REVISED APRIL 2008
MAXIMUM POWER DISSIPATION
vs TEMPERATURE
2.0
SOâ8 PowerPAD:
TJ(max) = +125_C
1.5
1.0
0.5 TJ (125_ C max) = TA + [(|VS| â |VO |) IO à θ JA]
θ
JA
=
52_ C/W,
SOâ8
PowerPAD
(1in à 0.5in heatâspreader, 1oz Copper)
0 TJ = 25_ C + (1.93W Ã 52_ C/W) = +125_ C
â50 â25
0
25
50
75 100 125
Temperature (_C)
60
50
40
30
20
10
0
10pF
SMALLâSIGNAL OVERSHOOT
vs LOAD CAPACITANCE
G = â1
G = +1
G = â2
G = 10
100pF
1nF
Load Capacitance
10nF
LARGEâSIGNAL STEP RESPONSE
G = 1, CL = 100pF
500ns/div
2.5µs/div
7
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