551012922-1 National Semiconductor, 551012922-1 Datasheet - Page 4

• Manufacturer Part Number: 551012922-1
• Description: BOARD EVAL UNIV FOR SC-70 AMP
• Manufacturer: National Semiconductor
• Series: WEBENCH® Buildit Boardr

Specifications of 551012922-1

• Channels Per Ic: 1 - Single
• Amplifier Type: General Purpose
• Board Type: Bare (Unpopulated)
• Utilized Ic / Part: SC-70-5, SC-70-6 Package
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Operating Temperature: -
• Output Type: -
• Current - Output / Channel: -
• Voltage - Supply, Single/dual (±): -
• -3db Bandwidth: -
• Slew Rate: -
• Current - Supply (main Ic): -

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SALLEN-KEY BAND-PASS FILTER
MULTIPLE FEEDBACK BAND-PASS FILTER
C
R
R
R
Set as determined using WEBENCH:
R
R
R
R
R
R
3
13
7
8
4
6
13
9
4
7
, C
FIGURE 9. Multiple Feedback High-Pass Filter
4
, C
Short
Short
Output series resistance (used for matching
transmission lines or isolation)
Input Termination
Short
Short
Short
Short
Output series resistance (used for matching
transmission lines or isolation)
FIGURE 10. Sallen-Key Band-Pass Filter
R5
, R
6
, R
C5
, R
14
, R
12
30013717
30013718
4
Note: If needed, an input termination resistor will need to be
soldered on to the SMA connector between the signal pin and
the ground pin.
Applications Using Two Amplifiers
TWO-AMPLIFIER FILTERS
Filters using two amplifiers can be built by connecting the
output of Amp A to the input of Amp B.
SINGLE-ENDED TO DIFFERENTIAL CONVERSION
The circuit in
a differential signal. This is done by using the combination of
an inverting amplifier and a non-inverting amplifier. Each am-
plifier generates output signals of equal magnitude but of
opposite polarity. This topology is useful in applications where
the signal source is single-ended, but the ADC requires a dif-
ferential input. The board will need to be modified by con-
necting Input A to Input B with a jumper wire.
Set the following as determined using WEBENCH:
R
C3
FIGURE 12. Single-Ended to Differential Conversion
, R
FIGURE 11. Multiple Feedback Band-Pass Filter
8
, C
5
, C
Figure 12
R11
, R
14
will convert a single-ended signal to
30013719
30013720