50026DOC.pdf

(126 KB) Pobierz
Linear Class A Preamplifiers
LC506/LV506 DATA SHEET
FEATURES
•
operating supply voltage 1.1 to 1.55 VDC
•
40 dB feedback stabilized gain
•
38 dB gain trim
•
0.95 regulated voltage LC506
•
0.90 regulated voltage LV506
DESCRIPTION
The LC506 and LV506 are class A non-inverting preamplifiers
with 40 dB feedback controlled, stabilized gain.
Gain trim is provided at pin 1, which simultaneously affects
both gain and output noise, independent of the main volume
control.
A voltage regulator is built on-chip to supply the amplifier and
electret microphone with precision reference voltage. A typical
regulator voltage for the LC506 is 0.95V, while it is 0.90V for the
LV506. This regulator feature of the LC506 allows it to be used
with the high power LD549 to provide increased supply rejection
during transient drops in supply voltage, caused by high
current peaks in the LD549.
Both LC506 and LV 506 devices are capable of operating from
a supply voltage of 1.55 VDC while continuously providing
80 dB of regulator supply rejection.
STANDARD PACKAGING
•
8 pin MICROpac (LC506)
•
8 pin MINIpac (LC506)
•
8 pin PLID
®
(LC506)
•
6 pin MINIpac (LV506)
BLOCK DIAGRAM
V
REG
3(3)
REGULATOR
V
B
4(6)
INPUT
2(2)
+
_
30K
6(8)
OUTPUT
230
1(1)
GAIN SET
5(7)
GND
Bracketed pin-out for LC506
Revision Date: January 1996
Document No. 500 - 26 - 05
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3
Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Suginami–ku Tokyo 168, Japan
tel. (905) 632-2996 fax: (905) 632-5946
tel. (03) 3334-7700
fax (03) 3247-8839
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE / UNITS
PIN CONNECTION
Supply Voltage
Power Dissipation
Storage Temperature
Operating Temperature
CAUTION
CLASS 1 ESD SENSITIVITY
3 VDC
60 mW
-20 to + 70
˚
C
-10 to + 60
˚
C
N/C
V
REG
I/P
Gain
Set
4
5
N/C
V
B
GND
V
REG
I/P
Gain
Set
3
4
V
B
GND
1
8
O/P
1
6
O/P
8 PIN
6 PIN
ELECTRICAL CHARACTERISTICS
PARAMETER
Gain
Temperature Coefficient of Gain
Quiescent Current (incl. microphone
simulator circuit)
Temperature Coefficient of Current
Microphone Supply Voltage
Conditions : V
B
= 1.30 VDC , temperature 25˚C
SYMBOL
A
V
CONDITIONS
V
OUT
= 0.25V
RMS (Note 1)
MIN
38
-
182
-
TYP
41
0.03
300
-2.0
0.95
0.90
1.2
1.5
350
30
2.5
5
0.2
MAX
44
-
362
-
1.00
0.95
2.0
3.8
-
-
-
-
-
UNITS
dB
dB/˚C
µA
µA/˚C
V
V
µV
%
mV
RMS
kΩ
kΩ
kHz
kHz
LC506
LV506
0.90
0.85
-
Input Referred Noise
Total Harmonic Distortion and Noise
Maximum Output at 7% THD
Input Impedance
Output Impedance
Frequency Response High (-3dB)
Low (-3dB)
All parameters and switches remain as shown in test circuit unless stated in conditions column.
V
OUT
= 0.25 V
RMS
-
-
-
-
-
-
Note 1:
A
V
= 20 log (VOUT/ V
IN
) + 40 dB where 40 dB is input attenuator
V
B
=1.3 VDC
R
B
=4.7
3(3)
33 K
4.7 K
3.3 K
0.1
+
2(2)
_
30K
V
IN
1 kHz
47
230
1(1)
+
10
5(7)
10 K
6(8)
0.1
V
OUT
REGULATOR
4(6)
+
10
Microphone Simulator Circuit
Bracketed pin-out for LC506
All external resistors in ohms, all capacitors in
µF
unless otherwise stated
Fig. 1 Test Circuit
500 - 26 - 05
2
DEVICE CHARACTERISTICS
60
50
40
GAIN (dB)
40
GAIN (dB)
20
30
0
100
100
1k
Frequency (Hz)
Fig. 2
Frequency Response
10k
1k
R
GT
(Ω)
Fig.3
Gain vs Gain Trim Resistor
10k
40
GAIN (dB)
GAIN (dB)
41
38
39
1.0
1.1
1.2
1.3
V
B
(V)
1.4
1.5
-20
0
10
T
A
( C)
o
20
40
60
Fig. 4 Voltage Gain vs Battery Voltage
Fig. 5 Gain vs Temperature
1.2
REGULATING VOLTAGE (V)
QUIESCENT CURRENT (µA)
450
1.0
350
0.8
250
-20
0
20
T
A
(
o
C)
40
60
-20
0
20
T
A
(
o
C)
40
60
Fig. 6 Regulating Voltage vs Temperature
Fig. 7 Quiescent Current vs Temperature
3
500 - 26 - 05
V
B
V
REG
450
QUIESCENT CURRENT (µA)
350
30K
30K
230
OUTPUT
250
1.0
1.1
1.2
1.3
V
B
(V)
1.4
1.5
INPUT
GAIN TRIM
All resistors in ohms, all capacitors in
µF
unless otherwise stated
GROUND
Fig. 8 Quiescent Current vs Battery Voltage
Fig. 9 Equivalent Circuit
V
B
=1.3 VDC
+
6.8
6.8
6.8
3
MIC
0.01
1
2.2
R
GT
10K
2
4
6
R
VC
=10K
1
0.1
2
3
4
6
5
0.047
8
470
TYP
LC506
5
LC/LD549
7
N/C
All Resistors in ohms, all capacitors in
µF
unless otherwise stated
Note :
Use LD549 with LV506
Fig. 10 Typical Application Circuit
REVISION NOTES
Chip information removed.
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
© Copyright Sept. 1982 Gennum Corporation. Revision Date: November 1991
All rights reserved. Printed in Canada.
500 - 26 - 05
4

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin