OPA2695 Datasheet, PDF (9/40 Pages) Texas Instruments – Dual, Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER with Disable

OPA2695
www.ti.com..................................................................................................................................................................................................... SBOS354 – APRIL 2008
TYPICAL CHARACTERISTICS: V_S = ±5V (continued)
At G = +8V/V, R_F = 402Ω, and R_L = 100Ω, unless otherwise noted.
INPUT VOLTAGE AND CURRENT NOISE DENSITY
100
Inverting Input Current Noise 22pA/ÖHz
Noninverting Input Current Noise 19pA/ÖHz
10
Input Voltage Noise
1.7nV/ÖHz
1
10³
10⁴
10⁵
10⁶
10⁷
10⁸
Frequency (Hz)
Figure 13.
INPUT RETURN LOSS vs FREQUENCY (S₁₁)
0
G = -8V/V
-10
-20
-30
G = +8V/V
-40
-50
-60
-70
10M
100M
1G
Frequency (Hz)
Figure 15.
RECOMMENDED R_S vs CAPACITIVE LOAD
1k
0.1dB Peaking Allowed
100
10
1
1
10
100
1000
Capacitive Load (pF)
Figure 17.
2-TONE, 3RD-ORDER INTERMODULATION INTERCEPT
45
50W
40
OPA2695
P_O
50W
50W
402W
P_I
35
G = +8V/V, Noninverting
30
G = -8V/V, Inverting
25
20
P_I
OPA2695
56.2W
402W
50W
P_O
50W
15
20 40 60 80 100 120 140 160 180 200 220 240
Frequency (MHz)
Figure 14.
OUTPUT RETURN LOSS vs FREQUENCY (S₂₂)
0
G = ±8V/V
-10
Without 2.7pF Trim Capacitor
-20
-30
-40
-50
With 2.7pF Trim Capacitor
-60
10M
100M
1/2
OPA2695
Trim Cap
Frequency (Hz)
Figure 16.
50W
2.7pF
S₂₂
1G
SMALL-SIGNAL FREQUENCY RESPONSE
vs CAPACITIVE LOAD
21
V_O = 0.5V_PP
C_L = 47pF
C_L = 22pF
C_L = 10pF
18
C_L = 100pF
15
R_S
50W ^OPA2695
12
402W
C_L
1kW⁽¹⁾
9
10M
56.2W
NOTE: (1) 1kW is optional.
100M
Frequency (Hz)
Figure 18.
400M
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