VB
1
VB
C6
C5
GM3038
10n
0µ22
VDD
R6R
R5S
R5
1MΩ
R5R
R6S
R6
600kΩ
ER102
CSAD
7
RHI RLO
VB
18
CFAD
2
1:1A
1:1B
6
4:1
5
3
1
4
1M
1M
85.6kΩ
53.5kΩ
VREG
SLOW
FAST
AVERAGE
DETECTOR
VREG
8
AVERAGE
REGULATOR
7
DETECTOR
C1
0µ1
RTH
1
X
19
CONTROL
RAGC_IN
RECTIFIER
VB
VB
50k
R3R
Any
R3
150kΩ
IN
Knowles or
Microtronic
microphone
48k
RH
C4
OUT
MPO
OUT
High Frequency
Expander / Compressor
C2
0µ2
10k
IN
24 dB / Oct
BAND SPLIT
FILTER
11
9
- B
- C
2
- A
6
20
0µ1
Any
2µ2
48k
Knowles
class D
integrated
receiver
R
L
8k4
GND
Low Frequency
Expander / Compressor
VSS
12k
15
8
5
14k
13
GND
10
AOUT
12
14
FOUT
17
16
REC
RFC
BIN
BOUT
R2R
R4
300kΩ
R2
150kΩ
SDA
SDA
R4R
C7
0µ22
C3
0µ1
4
3
BIN
RVC BOUT
All resistors in ohms, all capacitors
in farads, unless otherwise stated
100kΩ LOG
Fig. 2 Typical Application Circuit
VB = 1.3V
VB
1
C6
C5
GM3038
0µ22
10n
VDD
R6R
R5S
R5
1MΩ
R5R
R6S
R6
ER102
600kΩ
CSAD
7
RHI RLO
CFAD
2
1:1A
1:1B
6
4:1
5
VB
18
3
1
4
1M
1M
85.6kΩ
53.5kΩ
Table of Defaults
R2 - set 0
SLOW
FAST
VREG
8
AVERAGE
AVERAGE
DETECTOR
REGULATOR
7
DETECTOR
C1
0µ1
2µ2
R3 - set 15
R4 - set 15
R5 - set 31
R6 - set 15
RTH
1
X
19
CONTROL
RAGC_IN
RECTIFIER
VB
48k
50k
R3R
R3
150kΩ
IN
RH
C4
VIN
-80dBV
=
OUT
MPO
High Frequency
Expander / Compressor
C2
0µ2
10k
24 dB / Oct
BAND SPLIT
FILTER
11
9
- B
- C
2
- A
6
8
20
0µ1
50k
48k
Pink
Noise
R
L
8k4
Low Frequency
Expander / Compressor
Generator
VSS
12k
15
14k
13
GND
10
12
14
17
16
AOUT
FOUT
REC
RFC
BIN
BOUT
R2R
R4
300kΩ
R2
150kΩ
SDA
to programmer
5
R4R
C7
0µ22
C3
0µ1
4
BIN
3
RVC
BOUT
All resistors in ohms, all capacitors
in farads, unless otherwise stated
100kΩ
Fig. 3 Characterization Circuit (Used to generate typical curves)
521 - 62 - 04
4
GENNUM [ GENNUM CORPORATION ]
