551012876-001 National Semiconductor, 551012876-001 Datasheet - Page 4

• Manufacturer Part Number: 551012876-001
• Description: BOARD EVAL OPAMPS 8,10MSOP 8SOP
• Manufacturer: National Semiconductor
• Series: WEBENCH® Buildit Boardr

Specifications of 551012876-001

• Channels Per Ic: 2 - Dual
• Amplifier Type: General Purpose
• Board Type: Bare (Unpopulated)
• Utilized Ic / Part: 8-MSOP, 8-SOP, 10-MSOP Package
• Lead Free Status / RoHS Status: Lead free / RoHS 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
The following are the instructions for configuring a band-pass
filter.
MULTIPLE FEEDBACK BAND-PASS FILTER
The following are the instructions for configuring a Multiple
Feedback high-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
30015517
30015518
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 Figure 12 will convert a single ended signal to a
differential signal. This is done by using the combination of an
inverting amplifier and a non-inverting amplifier. Each ampli-
fier generates output signals of equal magnitude but of op-
posite 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
R11
, R
14
30015519
30015520