LX509 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – Low Current Quad Inverting Amplifiers

Low Current Quad
Inverting Amplifiers
LX509 - DATA SHEET
FEATURES
• 210 µA typical current drain
• 4 inverting opamps; B with 6 dB greater drive current
• minimum 46 dB open loop gain
• ideal for - active filtering
- dual channel hearing aids
- mixers
- microphone / telecoil preamps
STANDARD PACKAGING
• 10 pin PLID^®
• 10 pin SLT
• Chip (61 x 55 mils)
Au Bump
DESCRIPTION
The LX509 consists of 4 independent low noise, low current
inverting operational amplifiers utilizing Gennum's low voltage
bipolar JFET technology. Each amplifier has a minimum open
loop gain of 46 dB with the closed loop gain set by the ratio of
a feedback (R ) resistor to the source impedance (R ) . For
F
S
a well controlled gain tolerance from amplifier to amplifier, it is
recommended that the closed loop gain is at least 20 dB below
the open loop gain.
Three of the preamplifiers, A, C and D are capable of delivering
typically 30 µA of peak current drive while the fourth pre-
amplifier B has 6 dB more current drive capability, allowing a
6 dB greater output into the same load impedance, or the same
output level into one half the load impedance.
C_IN
C_OUT V_B D_IN
D_OUT
6
789
10
-C
-D
-B
-A
5
4
3
21
B_IN
B_OUT
A_IN
A_OUT GND
BLOCK DIAGRAM
Revision Date: January 2001
Document No. 510 - 30 - 06
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone]
Web Site: www.gennum.com E-mail: [e-mail]