Gennum Corporation LX509 Datasheet
Low Current Quad
Inverting Amplifiers
LX509 - DATA SHEET
FEATURES
µA typical current drain
• 210
• 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
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 preamplifier 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.
) resistor to the source impedance (RS) . For
F
C
IN
C
OUT
V
D
B
IN
D
OUT
6 7 8 9 10
- C
- B
- D
- A
5 4 3 2 1
B
IN
B
OUT
BLOCK DIAGRAM
A
IN
A
OUT
GND
Revision Date: January 2001
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996
Document No. 510 - 30 - 06
Web Site: www.gennum.com E-mail: hipinfo@gennum.com
ABSOLUTE MAXIMUM RATINGS
PIN CONNECTION
PARAMETER VALUE / UNITS
Supply Voltage 5V DC
Operating Temperature -10o to +40oC
Storage Temperature -20o to +70oC
CAUTION
CLASS 1 ESD SENSITIVITY
B IN
B OUT
A IN
A OUT
GND
5
1
6
10
ELECTRICAL CHARACTERISTICS
V
Pin voltage measured with conditions as shown in Test Circuit
OUT
Positive Current corresponds to current INTO the pin
Negative Current corresponds to current OUT of the pin
Conditions: Frequency = 1 kHz, Temperature = 25
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
o
C, Supply Voltage VB = 1.3 VDC
C IN
C OUT
V
B
D IN
D OUT
Total Current I
Input Bias Voltage V
Input Bias Current I
Output Voltage Swing - Hi V
Output Voltage Swing - Lo V
Open Loop Voltage Gain A
TOT
BIAS
BIAS
VOL
OH
OL
RF = 1 MΩ -50 0 50 nA
V
= 0.4 VDC
IN
I
= -10 µA, (Note 1)
L
I
= +1 µA
IN
I
= +10 µA, (Note 2)
L
= ∞ 200 580 - mVDC
' RF
= ∞ 200 280 - mVDC
' RF
115 210 305 µA
500 570 620 mVDC
46 56 - dB
Input Referred Noise IRN NFB 0.2 to 10kHz at 12dB/Oct - 1 - µVRMS
Harmonic Distortion THD - 1 - %
Current Drive A, C, D, - 30 - µA
Capability B - 60 - µA
All Parameters and Switches remain as shown in Test Circuit unless otherwise stated in "Conditions" Column
Notes: 1 V
2 V
OH
OL
= V
= V
180 µV
at 1kHz
OUT
OUT
- V
(IL = -10 µA for Blocks A, C, D, I
OUT
- V
(I
= +10 µA for Blocks A, C, D, I
OUT
L
V
C
RMS
R
3.92k
S
S
1.0
= -20 µA for Block B)
L
= +20 µA for Block B)
L
= 0
R
F
a
IN
S1
-A to -D
b
V
OUT
= 0
I
L
510 - 30 - 06
All resistors in ohms, all capacitors in µF unless otherwise stated
Fig. 1 LX509 Test Circuit
2
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