OPA641H BURR-BROWN [Burr-Brown Corporation], OPA641H Datasheet - Page 11

• Manufacturer Part Number: OPA641H
• Description: Wideband Voltage Feedback OPERATIONAL AMPLIFIER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

NOISE FIGURE
The OPA641 voltage and current noise spectral densities are
specified in the Typical Performance Curves. For RF appli-
cations, however, Noise Figure (NF) is often the preferred
noise specification since it allows system noise performance
to be more easily calculated. The OPA641’s Noise Figure vs
Source Resistance is shown in Figure 7.
FIGURE 7. Noise Figure vs Source Resistance.
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. SPICE models are available
for the OPA641. Contact Burr-Brown Applications Depart-
ment to receive a spice diskette.
25
20
15
10
5
0
10
100
Source Resistance ( )
NF = 10 LOG 1 +
1k
e
10k
n
2
4KTR
+ (I
n
R
S
S
)
2
100k
11
ENVIRONMENTAL (Q) SCREENING
The inherent reliability of a semiconductor device is con-
trolled by the design, materials and fabrication of the device
—it cannot be improved by testing. However, the use of
environmental screening can eliminate the majority of those
units which would fail early in their lifetimes (infant mortal-
ity) through the application of carefully selected accelerated
stress levels. Burr-Brown “Q-Screening” provides environ-
mental screening to our standard industrial products, thus
enhancing reliability. The screening illustrated in the follow-
ing table is performed to selected stress levels similar to
those of MIL-STD-883.
DEMONSTRATION BOARDS
Demonstration boards to speed prototyping are available.
Refer to the DEM-OPA64X Datasheet for details.
NOTE: Q-Screening is available on the HSQ package only.
SCREEN
Internal Visual
Stabilization Bake
Temperature Cycling
Burn-In Test
Centrifuge
Hermetic Seal
Electrical Tests
External Visual
Fine: He leak rate < 5 x 1x0
Gross: per Fluorocarbon bubble test, 60PSiG
Temperature = –65 C to 150 C, 10 cycles
Temperature = 125 C, 160 hrs minimum
As described in specifications tables.
Temperature = 150 C, 24 hrs
Burr-Brown QC4118
Burr-Brown QC5150
OPA641
METHOD
20,000G
–8
atm cc/s, 30PSiG
®