LMV116 Datasheet, PDF (13/23 Pages) National Semiconductor (TI) – Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option

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1/5
74HC04
SELECT
INPUT
1/5
74HC04
LMV116, LMV118
SNOSA87B – OCTOBER 2003 – REVISED MAY 2013
2k
INPUT A
2k
2.7V
-
SHUTDOWN
LMV118
+
INPUT B
2.7V
R_L
SHUTDOWN
+
LMV118
-
2k
2k
Figure 26. 2:1 MUX Operating off a 2.7V Single Supply
Figure 27 shows the MUX output when selecting between a 1MHz sine and a 250kHz triangular waveform.
V_OUT
SELECT
1 V/DIV
1 µs/DIV
Figure 27. 2:1 MUX Output
As can be seen in Figure 27, the output is well behaved and there are no spikes or glitches due to the switching.
Switching times are approximately around 500ns based on the time when the output is considered “valid”.
PRINTED CIRCUIT BOARD LAYOUT, COMPONENT VALUES SELECTION, AND EVALUATION
BOARDS
Generally, a good high-frequency layout will keep power supply and ground traces away from the inverting input
and output pins. Parasitic capacitances on these nodes to ground will cause frequency response peaking and
possible circuit oscillations (see Application Note OA-15 (SNOA367) for more information).
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