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PDF SA5230N Data sheet ( Hoja de datos )
| Número de pieza | SA5230N | |
| Descripción | Low voltage operational amplifier | |
| Fabricantes | Philips | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SA5230N (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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INTEGRATED CIRCUITS
NE/SA5230
Low voltage operational amplifier
Product specification
1994 Aug 31
Philips
Semiconductors
1 page  
Philips Semiconductors
Low voltage operational amplifier
Product specification
NE/SA5230
DC AND AC ELECTRICAL CHARACTERISTICS (Continued)
SYMBOL
PARAMETER
VOUT
Output voltage swing
SR
BW
θM
tS
VINN
Slew rate
Inverting unity gain bandwidth
Phase margin
Settling time
Input noise
THD
Total Harmonic Distortion
TEST CONDITIONS
VS=±0.9V
TA=25°C +SW
TA=25°C -SW
+SW
-SW
VS=±7.5V
TA=25°C +SW
TA=25°C -SW
+SW
-SW
TA=25°C
TA=25°C
CL=100pF, TA=25°C
CL=100pF, TA=25°C
CL=100pF, TA=25°C
CL=100pF, 0.1%
CL=100pF, 0.1%
RS=0Ω, f=1kHz
RS=0Ω, f=1kHz
VS=±7.5V
AV=1, VIN=500mV, f=1kHz
VS=±0.9V
AV=1, VIN=500mV, f=1kHz
BIAS
Any
Any
Any
Any
Any
Any
Any
Any
High
Low
High
Low
Any
High
Low
High
Low
High
NE/SA5230
Min Typ Max
750 800
750 800
700
700
7.30 7.35
-7.32 -7.35
7.25 7.30
-7.30 -7.35
0.25
0.09
0.6
0.25
70
2
5
30
60
0.003
High
0.002
UNIT
mV
V
V/µs
MHz
Deg.
µs
nV/√Hz
%
1994 Aug 31
5
5 Page 
Philips Semiconductors
Low voltage operational amplifier
Product specification
NE/SA5230
HALF-WAVE RECTIFIER WITH RAIL-TO-GROUND
OUTPUT SWING
Since the NE5230 input common-mode range includes both positive
and negative supply rails and the output can also swing to either
supply, achieving half-wave rectifier functions in either direction
becomes a simple task. All that is needed are two external resistors;
there is no need for diodes or matched resistors. Moreover, it can
have either positive- or negative-going outputs, depending on the
way the bias is arranged. This can be seen in Figure 8. Circuit (a) is
biased to ground, while circuit (b) is biased to the positive supply.
This rather unusual biasing does not cause any problems with the
NE5230 because of the unique internal saturation detectors
incorporated into the part to keep the PNP and NPN output
transistors out of “hard” saturation. It is therefore relatively quick to
recover from a saturated output condition. Furthermore, the device
does not have parasitic current draw when the output is biased to
either rail. This makes it possible to bias the NE5230 into
“saturation” and obtain half-wave rectification with good recovery.
The simplicity of biasing and the rail-to-ground half-sine wave swing
are unique to this device. The circuit gain can be changed by the
standard op amp gain equations for an inverting configuration.
It can be seen in these configurations that the op amp cannot
respond to one-half of the incoming waveform. It cannot respond
because the waveform forces the amplifier to swing the output
beyond either ground or the positive supply rail, depending on the
biasing, and, also, the output cannot disengage during this half
cycle. During the other half cycle, however, the amplifier achieves a
half-wave that can have a peak equal to the total supply voltage.
The photographs in Figure 9 show the effect of the different biasing
schemes, as well as the wide bandwidth (it works over the full audio
range), that the NE5230 can achieve in this configuration.
By adding another NE5230 in an inverting summer configuration at
the output of the half-wave rectifier, a full-wave can be realized. The
values for the input and feedback resistors must be chosen so that
each peak will have equal amplitudes. A table for calculating values
is included in Figure 10. The summing network combines the input
signal at the half-wave and adds it to double the half-wave’s output,
resulting in the full-wave. The output waveform can be referenced to
the supply or ground, depending on the half-wave configuration.
Again, no diodes are needed to achieve the rectification.
This circuit could be used in conjunction with the remote transducer
to convert a received AC output signal into a DC level at the
full-wave output for meters or chart recorders that need DC levels.
10
VCC
10
VIN
2
–
7
3+
4
6
5
VCC
VOUT
O
t
a. Rail-to-Ground Output Swing Referenced to Ground
VCC
VCC
3
+
7
6 VOUT
10 2 –
5
VIN 4
VCC
10
t
b. Negative-Going Output Referenced to VCC
Figure 8. Half-Wave Rectifier With Positive-Going Output Swings
SL00257
1994 Aug 31
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet SA5230N.PDF ] | |
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