OPA2607 Datasheet, PDF (6/13 Pages) Burr-Brown (TI) – Dual, High Output, Current-Feedback OPERATIONAL AMPLIFIER

TYPICAL PERFORMANCE CURVES: V_S = ±12V (Cont.)
At T_A = +25°C, G = +8, R_F = 1.21kΩ, and R_L = 100Ω, unless otherwise noted. See Figure 1 for AC performance only.
TWO-TONE,3RD-ORDER
INTERMODULATION SPURIOUS
–50
Load Power at Matched 50Ω Load
–60
–70
–80
–90
–5
f_O = 2MHz
f_O = 1MHz
f_O ≤ 500kHz
0
5
10
15
20
Single-Tone Load Power (dBm)
APPLICATIONS INFORMATION
WIDEBAND CURRENT FEEDBACK OPERATION
The OPA2607 gives the exceptional AC performance of a
wideband current feedback op amp with a highly linear,
high power output stage. Requiring only 8.0mA/chan quies-
cent current, the OPA2607 will swing to within 2V of either
supply rail and deliver in excess of 180mA guaranteed at
room temperature. This low output headroom requirement,
along with supply-voltage independent biasing, gives re-
markable single (+15V) supply operation. Previous boosted
output stage amplifiers have typically suffered from very
poor crossover distortion as the output current goes through
zero. The OPA2607 achieves a comparable power gain with
much better linearity. The primary advantage of a current-
feedback op amp over a voltage-feedback op amp is that AC
performance (bandwidth and distortion) is relatively inde-
pendent of signal gain.
Figure 1 shows the DC-coupled, gain of +8, dual power-
supply circuit configuration used as the basis of the ±12V
Specifications and Typical Performance Curves. For test
purposes, the input impedance is set to 50Ω with a resistor
to ground and the output impedance is set to 50Ω with a
series output resistor. Voltage swings reported in the speci-
fications are taken directly at the input and output pins while
load powers (dBm) are defined at a matched 50Ω load.
For the circuit of Figure 1, the total effective load will be
100Ω || 1379Ω = 93Ω.
+12V
0.1µF
+V_S
2.2µF
+
50Ω Source
V_I
49.9Ω
1/2
OPA2607
50Ω Load
V_O 49.9Ω
R_F
1.21kΩ
R_G
169Ω
–V_S
–12V
2.2µF
0.1µF
FIGURE 1. DC-Coupled, G = +8, Bipolar Supply, Specifi-
cation and Test Circuit.
®
OPA2607
6