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PDF LD505 Data sheet ( Hoja de datos )
| Número de pieza | LD505 | |
| Descripción | High Gain Class A Amplifier | |
| Fabricantes | Gennum Corporation | |
| Logotipo |  |
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GENNUM
CORPORATION
High Gain Class A Amplifier
LC505/LD505 DATA SHEET
FEATURES
DESCRIPTION
• 71 dB of gain with 1.3 V supply
The LC/LD505 are low voltage, linear monolithic integrated
• 0.2 to 2.0 mA of transducer current adjustment
• 43 dB of volume control range
D• 1.0 to 1.6 V supply operating range
E• 2.2 kΩ internal decoupling resistor for microphone
bias (LD505 only)
D• output limiting capabilities (LD505 only)
EN NSSTANDARD PACKAGING
• MINIpac P6 (LC505)
M IG• MINIpac P8 (LD505)
amplifiers with a typical electrical gain of 71 dB. The circuits
are comprised of a compensated, unconditionally stable,
operational amplifier and a low distortion Class A single
transistor output stage with negative feedback for stability
over a wide temperature range.
Current trimming in the output stage for inductive or resistive
loads can be accomplished by connecting an emitter resistor
from RE to ground. The LC/LD505 can operate over a supply
voltage range of 1.0 to 1.6 DC.
The LD505 which is an eight pin device, has an internal 2.2 kΩ
decoupling resistor for microphone bias providing increased
supply line rejection. The base of the output transistor is also
accessible allowing connection of diodes in a feedback
configuration for peak limiting.
OT RENCEOWM DESIN
N FOR5
VB
3
+
-
33k
2
OUT
MICBIAS
8
VB LIMITER
41
IN
6
2.2k
+
-
33k
3
OUT
VC 100
4 6 200
GND
All resistors in ohms, all capacitors in
microfarads unless otherwise stated
1
RE
VC 100
5
7 200
GND
All resistors in ohms, all capacitors in
microfarads unless otherwise stated
2
RE
LC505 BLOCK DIAGRAM
LD505 BLOCK DIAGRAM
Revision Date: January 1996
Document No. 500 - 15 - 09
1 500 - 15 - 09
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2055
Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Sugi nami–ku, Tokyo 168, Japan tel. (03) 3247-8838 fax (03) 3247-8839
1 page  
VCR (dB)
46
44
42
40
10
100
RE (Ω)
1k
10k
Fig. 10 Volume Control Range vs Emitter Resistor
gm (mV)
6
4
2
0
10
100
RE (Ω)
1k
Fig. 11 Transductance vs Emitter Resistor
10k
2.2 k
+
10
VB =1.35
Vcc
1k
3
5
0.33 LC505
4
100 k
+
10
6
2
1
33
VB =1.35
Vcc
+
10
1k
0.333
84
63
LD505 1
572
100k
+ 10
+
10
10k
MAXIMUM
OUTPUT
CONTROL
33
All resistors in ohms, all capacitors in microfarads unless otherwise stated
Fig. 12 LC505 Typical Hearing Aid Application
All resistors in ohms, all capacitors in microfarads unless otherwise stated
Fig. 13 LD505 Typical Hearing Aid Application
REVISION NOTES:
Chip information removed.
DOCUMENT
IDENTIFICATION
PRODUCT PROPOSAL
This data has been compiled for market investigation purposes
only, and does not constitute an offer for sale.
ADVANCE INFORMATION NOTE
This product is in development phase and specifications are
subject to change without notice. Gennum reserves the right to
remove the product at any time. Listing the product does not
constitute an offer for sale.
PRELIMINARY DATA SHEET
The product is in a preproduction phase and specifications are
subject to change without notice.
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
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 March 1976 Gennum Corporation. All rights reserved. Printed in Canada.
5 500 - 15 - 09
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| PDF Descargar | [ Datasheet LD505.PDF ] | |
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