551012875-001 National Semiconductor, 551012875-001 Datasheet - Page 3

• Manufacturer Part Number: 551012875-001
• Description: BOARD EVALUATION OP AMPS SOT-23
• Manufacturer: National Semiconductor
• Series: WEBENCH® Buildit Boardr

Specifications of 551012875-001

• Channels Per Ic: 1 - Single
• Amplifier Type: General Purpose
• Board Type: Bare (Unpopulated)
• Utilized Ic / Part: SOT-23-5, SOT-23-6 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): -

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