LS505 Datasheet, PDF (1/5 Pages) Gennum Corporation – High Gain Class A Amplifier with Peak Clipping

FEATURES
• 72 dB typical gain
• 0.2 to 2.0 mA of transducer current adjustment
• 43 dB range of feedback volume control
• 1.0 to 1.6 V supply operating range
• Schottky diodes provide symmetrical peak clipping
• requires only 4 external parts for operation
STANDARD PACKAGING
• 8 pin MINIpac
• 8 pin MICROpac
• 8 pin PLID^®
• 8 pin SLT
• Chip (56 x 55 mils)
High Gain Class A Amplifier
with Peak Clipping
LS505 DATA SHEET
DESCRIPTION
The LS505 is a low voltage, monolithic integrated circuit
amplifier comprised of an operational amplifier driving a
single transistor Class A output stage with open collector.
Also included are a pair of complementary Schottky diodes
which provide the capability for symmetrical peak clipping in
a feedback configuration.
An internal negative feedback loop ensures a stable operating
point for the output stage over the designed operating voltage.
This also permits trimming of the output current with the use
of a single external resistor.
The input stage and microphone are biased by an internal
2.2 kΩ decoupling resistor to increase battery line signal
rejection.
V_MIC
VB
8
4
MPO
1
I/P
6
100
R_VC
5
2.2k
+
-
33k
200
7
2
GND
R_E
BLOCK DIAGRAM
All resistors in ohms, all capacitors in farads unless otherwise stated.
O/P
3
Revision Date: January 1996
Document No. 500 - 20 - 11
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone] fax: [phone]
Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Suginami–ku Tokyo 168, Japan tel. [phone] fax [phone]