551012922-001/NOPB National Semiconductor, 551012922-001/NOPB Datasheet - Page 3

• Manufacturer Part Number: 551012922-001/NOPB
• Description: SC-70 Amplifier Universal Evaluation Board
• Manufacturer: National Semiconductor

Specifications of 551012922-001/NOPB

• Silicon Manufacturer: National
• Application Sub Type: Operational Amplifiers
• Kit Application Type: Amplifier
• Silicon Core Number: LMV651, LMV641, LMV841, LMV771, LMV551, LMV981, LMV851, LMV821, LMV831, LMV321, LPV321, LMV341

ACTIVE FILTER APPLICATIONS
Both Sallen-Key and Multiple Feedback filters can be built on
this PCB. To design a filter, use the WEBENCH
www.national.com. Performance at high frequencies is limit-
ed to the gain bandwidth product of the amplifier, but within
this frequency range, these active filters can achieve very
good accuracy, if low-tolerance resistors and capacitor are
used.
SALLEN-KEY LOW-PASS FILTER
MULTIPLE FEEDBACK LOW-PASS FILTER
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.
C
R
R
R
Set the following as determined using WEBENCH:
R
R
R
R
C
R
Set the following as determined using WEBENCH:
R
3
13
7
8
4
6
13
9
5
7
C3
, R
, C
5
, C
R8
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)
, R
R6
FIGURE 6. Sallen-Key Low-Pass Filter
, R
4
, R
14
11
, R
, C
12
10
®
tool at
30013714
3
SALLEN-KEY HIGH-PASS FILTER
MULTIPLE FEEDBACK HIGH-PASS FILTER
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.
C
R
R
R
R
Set as determined using WEBENCH:
C
R
R
R
Set the following as determined using WEBENCH:
C
3
13
14
7
8
R4
9
4
7
3
, R
, C
FIGURE 7. Multiple Feedback Low-Pass Filter
8
, C
R5
Short
Short
Short
Output series resistance (used for matching
transmission lines or isolation)
Input Termination
Short
Short
Output series resistance (used for matching
transmission lines or isolation)
, R
FIGURE 8. Sallen-Key High-Pass Filter
5
, C
C5
R11
, R
, R
6
14
www.national.com
30013716
30013715