Texas Instruments Evaluation board for 5-pin, north facing amplifiers in the SC70 package LMH730268/NOPB LMH730268/NOPB 데이터 시트
제품 코드
LMH730268/NOPB
R
11
x
R
14
R
6
=
R
11
- R
14
R
11
x
R
T
R
8
=
R
11
- R
T
V
OUT
V
IN
= -
R
14
R
11
+
-
V
OUT
R
11
R
8
R
14
R
7
C
3
, R
9
, R
13
= 0 (SHORT)
R
6
V
IN
Circuit Configurations
3.2
Inverting Amplifier
C
3
Short
R
9
Short
R
13
Short
R
8
Input Termination
R
7
Output series resistance (used for matching transmission lines or isolation)
R
14
Gain Resistor
R
11
Gain Resistor
Figure 5. Inverting Amplifier
Where:
(2)
3.3
Register Calculations
Input Impedance: Set R
T
to the desired input impedance. Calculate R
8
where:
(3)
To cancel the input bias current set R
6
to the value calculated with the following formula:
(4)
3.4
Active Filter Applications
Both Sallen-Key and Multiple Feedback filters can be built on this PCB. To design a filter, use the
WEBENCH™ tool at
WEBENCH™ tool at
Performance at high frequencies is limited 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.
tolerance resistors and capacitor are used.
4
AN-1606 551012875, 551012922 Universal Op Amp Evaluation Boards
SNOA487C – May 2007 – Revised May 2013
(SOT-23 and SC-70)
Copyright © 2007–2013, Texas Instruments Incorporated