LMV931, LMV932
http://onsemi.com
14
APPLICATION INFORMATION
+
−
R1
R2
V
O
V
ref
V
in
V
OH
V
O
V
OL
Hysteresis
V
inL
V
inH
V
ref
MC1403
LMV931
−
+
R1
V
CC
V
CC
V
O
2.5 V
R2
50 k
10 k
V
ref
5.0 k
R
C
R
C
+
−
V
O
For: f
o
= 1.0 kHz
R = 16 kW
C = 0.01 mF
V
CC
LMV931
LMV931
Figure 29. Voltage Reference Figure 30. Wien Bridge Oscillator
Figure 31. Comparator with Hysteresis
V
O
+ 2.5 V(1 )
R1
R2
)
V
ref
+
1
2
V
CC
f
O
+
1
2pRC
V
in
L +
R1
R1 ) R2
(V
OL
* V
ref)
) V
ref
V
in
H +
R1
R1 ) R2
(V
OH
* V
ref)
) V
ref
H +
R1
R1 ) R2
(V
OH
* V
OL
)
For less than 10% error from operational amplifier,
((Q
O
f
O
)/BW) < 0.1 where f
o
and BW are expressed in Hz.
If source impedance varies, filter may be preceded with
voltage follower buffer to stabilize filter parameters.
Given: f
o
= center frequency
A(f
o
) = gain at center frequency
Choose value f
o
, C
V
in
Figure 32. Multiple Feedback Bandpass Filter
−
+
V
CC
R3
R1
R2
V
ref
C
C
V
O
CO = 10 C
C
O
LMV931
Then : R3 +
Q
pf
O
C
R1 +
R3
2A(f
O
)
R2 +
R1 R3
4Q
2
R1 * R3
ORDERING INFORMATION
Order Number
Number of
Channels
Number of Pins Package Type Shipping
†
LMV931SQ3T2G Single 5 SC70−5
(Pb−Free)
3000 / Tape & Reel
LMV931SN3T1G Single 5 TSOP−5
(Pb−Free)
3000 / Tape & Reel
LMV932DMR2G* Dual 8 Micro8
(Pb−Free)
4000 / Tape & Reel
LMV932DR2G Dual 8 SOIC−8
(Pb−Free)
2500 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*Consult Sales.
