VB=1.3 VDC
5
ED1913
4
3
200 mV
REF
VREG
1µ0
16 dB
28 dB
CS
+
_
7
A
-
-
B
C
0µ1
RS
3k9
CONTROL
2
1
8
6
1µ0
0µ1
100k
RVC
20K
All resistors in ohms, all capacitors
in farads unless otherwise stated
Fig. 3 Typical Hearing Aid Application
0
-10
-20
-30
-40
-50
-60
-70
-80
0
-10
-20
-30
-40
-50
-60
-70
-80
RVC = 100k
RVC = 47k
RVC = 22k
RVC = 3.3K
RVC = 10K
-100
-90
-80
-70
-60
-50
-40
-100
-90
-80
-70
-60
-50
-40
INPUT (dBV)
INPUT (dBV)
Fig. 5 I/O Characteristics at Pin 1
Fig. 4 I/O Characteristics at Various
RVC Values (Pin 7)
5
4
2
0
-5
CS = 0.22µF
0
-2
CS = 0.1µF
-4
CS = 0.033µF
-6
-10
-15
-20
-25
-30
CS = 0.047µF
-8
-10
-12
-14
-16
-18
-20
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
20
200
2K
20K
FREQUENCY
SUPPLY VOLTAGE (V
)
DC
Fig. 6 Closed Loop Frequency Response
at Various CS Values
Fig. 7 Gain vs Supply Voltage
500 - 75 - 08
4
GENNUM [ GENNUM CORPORATION ]
