OPA620 Datasheet, PDF (14/15 Pages) Burr-Brown (TI) – Wideband Precision OPERATIONAL AMPLIFIER

SPICE MODELS
Computer simulation using SPICE is often useful when
analyzing the performance of analog circuits and systems.
This is particularly true for Video and RF amplifier circuits
where parasitic capacitance and inductance can have a major
effect on circuit performance. A SPICE model using
MicroSim Corporation’s PSpice is available for the OPA620.
This simulation model is available through the Burr-Brown
web site at www.burr-brown.com or by contacting the Burr-
Brown Applications Department.
RELIABILITY DATA
Extensive reliability testing has been performed on the
OPA620. Accelerated life testing (2000 hours) at maximum
operating temperature was used to calculate MTTF at an
ambient temperature of 25°C. These test results yield MTTF
of: Cerdip package = 1.31E+9 Hours, Plastic DIP = 5.02E+7
Hours, and SO-8 = 2.94E+7 Hours. Additional tests such as
PCT have also been performed. Reliability reports are avail-
able upon request for each of the package options offered.
DEMONSTRATION BOARDS
Demonstration boards are available to speed protyping. The
8-pin DIP packaged parts may be evaluated using the DEM-
OPA65XP board while the SO-8 packaged part may be
evaluated using the DEM-OPA65XU board. Both of these
boards come partially assembled from your local distributor
(the external resistors and the amplifier are not included).
APPLICATIONS
390 Ω
390 Ω
Video
Input
OPA620
75Ω
High output current drive capability (6Vp-p into 50Ω)
allows three back-terminated 75Ω transmission lines
to be simultaneously driven.
FIGURE 11. Video Distribution Amplifier.
75ΩTransmission Line
75Ω
75Ω
75Ω
75Ω
75Ω
75Ω
V_OUT
V_OUT
V_OUT
OPA620
R₁
V_IN
15.8kΩ
C₂
1000pF
R₂
158Ω
C₁
1000pF
R₃
2kΩ
R₄
2kΩ
R₅
158Ω
OPA620
V_OUT
f_C = 1MHz
BW = 20kHz at –3dB
Q = 50
(–)
D
D
(+)
*J₁ *J₂
S
S
2N5911
*R₁
2kΩ
*R₂
2kΩ
+5V
2
7
6
OPA620
3
4
V_OUT
–5V
Feedback from pin 6 to the (–) FET
input required for stability.
* Select J₁, J₂ and R₁, R₂ to set
input stage current for optimum
I_B : 1pA
e_N : 6nV/√Hz at 1MHz
Gain-Bandwidth : 200MHz
Slew Rate : 250 V/µs
performance.
Settling Time : 15ns to 0.1%
FIGURE 12. High-Q 1MHz Bandpass Filter.
®
OPA620
FIGURE 13. Low Noise, Wideband FET Input Op Amp.
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