Gennum Corporation GS563 Datasheet
Single Stage
Inverting Amplifier
GS563 - DATA SHEET
FEATURES
• 1.0 to 5 VDC operating range
• low current consumption (54
µA)
• 1% electrical distortion
• typically 55 dB open loop gain
• low pin count (4 pin)
• ideal for active filtering
DESCRIPTION
The GS563 is a low noise, low current, inverting amplifier which
utilizes Gennum's low voltage bipolar JFET technology.
The amplifier has a minimum open loop gain of 45 dB with the
closed loop gain set by the ratio of feedback resistor to the
input resistor. For a well controlled gain tolerance, it is
recommended that the closed loop gain be at least 20 dB
below the open loop gain.
The device is internally bias compensated, preventing any DC
current flow via external feedback resistors. It is ideally suited
for filtering applications and can be used as a drop in
replacement for single transistor configurations.
FUNCTIONAL BLOCK DIAGRAM
OUTPUT
V
CC
INPUT
GS563
3
7
2
6
GND
STANDARD PACKAGING
• 8 pin PLID
®
• Chip size 27 x 25 mils
Document No. 520 - 67 - 01
Revision Date: May 1998
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996
Web Site: www.gennum.com E-mail: hipinfo@gennum.com
2
520 - 67 - 01
R
F =
1M
10µA
R1
1k
680pF
C1
1.0
V
IN
R
S
3k92
V
OUT
R2
10
a
b
c
S1
a
b
c
d
a
b
c
1µA
V
CC
1.3V
1µF
S3
V
10µA
S2
R
F
= 392k
180mV
RMS
at 1kHz
0.4V
DC
+
A
GS563
6
2
7
3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Amplifier Current I
AMP
30 54 80 µA
Bias Voltage (Pin 3) V
Q3
475 550 675 mV
Bias Current (Pin 3) I
BIAS
See Note 1 -50 0 50 nA
Output Voltage V
OH
S1 = c, S2 = b, S3 = b 200 590 - mV
Swing - High (Pin 3) See Note 2
Output Voltage V
OL
S1 = b, S2 = b, S3 = c 200 258 - mV
Swing - Low (Pin 3) See Note 3
Open Loop Gain A
OL
S1 = d, S2 = c, See Note 4 45 55 - dB
Input Referred Noise I.R.N. Aweight S1 = d, S2 = c - 1.0 2.5 µV
Distortion THD S1 = d, S2 = c, V
OUT
<100 mV
RMS
- 0.64 1.0 %
Supply Rejection P
SRR
Open Loop
6 11 - dB
All switch positions remain as shown in Test Schematic unless otherwise stated. VP is the actual voltage measured on the pin at given condition.
V
Q
- quiescent (unbias) voltage measured on the pad (nothing connected to the pin)
Note: 1. I
BIAS
= (VP3 [S2 = b] - VQ3) /1M
2. V
OH
= V
P6
- V
Q6
3. VOL= VQ6 - V
P6
4. AOL= 20 log (1 + RF / RS) - (20 log ( (RF / RS) (1 / (1 + R1 / R2) ) (VIN / V
OUT
) - 1) )
ELECTRICAL CHARACTERISTICS Stage = 1.3V Temperature = 25
o
C
Fig. 1 GS563 Test Circuit
PIN CONNECTIONS ABSOLUTE MAXIMUM RATINGS
PARAMETER VALUE / UNITS
Supply Voltage 5V DC
Power Dissipation 25 mW
Operating Temperature -10o to +40oC
Storage Temperature -20o to +70oC
CAUTION
CLASS 1 ESD SENSITIVITY
All resistors in ohms, all capacitors
in farads unless otherwise stated.
V
CC
OUT
GND
IN
1
45
8
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