OPA445SM Datasheet, PDF (7/25 Pages) Texas Instruments – High Voltage FET-Input OPERATIONAL AMPLIFIER

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TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C and V_S = ±40V, unless otherwise noted.
MAXIMUM POWER DISSIPATION
vs TEMPERATURE
0.8
No Heat Sink
0.7
0.6
Plastic DIP
TO−99
0.5
0.4
0.3
0.2
T_J (max)
0.1 TO−99: 150_ C
DIP, SO: 125_C
0
SO−8
Surface−Mount
(non PowerPAD)
−50 −25
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 slew−rate
induced distortion.
10k
100k
1M
Frequency (Hz)
SMALL−SIGNAL STEP RESPONSE
G = 1, C_L = 100pF
OPA445
SBOS156B − MARCH 1987 − REVISED APRIL 2008
MAXIMUM POWER DISSIPATION
vs TEMPERATURE
2.0
SO−8 PowerPAD:
T_J(max) = +125_C
1.5
1.0
0.5 ^TJ ^{(125_ C max) = T}A ^{+ [(|V}S^{| − |V}O ^{|) I}O ^{× θ} JA^]
θ
JA
=
52_ C/W,
SO−8
PowerPAD
(1in × 0.5in heat−spreader, 1oz Copper)
0 ^{TJ = 25_ C + (1.93W × 52_ C/W) = +125_ C}
−50 −25
0
25
50
75 100 125
Temperature (_C)
60
50
40
30
20
10
0
10pF
SMALL−SIGNAL OVERSHOOT
vs LOAD CAPACITANCE
G = −1
G = +1
G = −2
G = 10
100pF
1nF
Load Capacitance
10nF
LARGE−SIGNAL STEP RESPONSE
G = 1, C_L = 100pF
500ns/div
2.5µs/div
7