Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Suginami–ku, Tokyo 168, Japan
tel. (905) 632-2996 fax: (905) 632-5946
tel. (03) 3334-7700
fax (03) 3247-8839
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
VALUE/UNITS
3 V DC
25 mW
-10°C to 50° C
-20°C to 70° C
GAIN SET
A OUT
V
REG
A IN
PIN CONNECTION
4
5
AGC FILTER
AGC IN
V
B
1
8
GND
CAUTION
CLASS 1 ESD SENSITIVITY
ELECTRICAL CHARACTERISTICS
Conditions: Frequency = 1 kHz, Temperature = 25°C, Supply Voltage V
B
= 1.3 VDC
PARAMETER
Gain
SYMBOL
A
V
CONDITIONS
V
OUT
= 11.0 mV,
20 Log (
V
OUT
V
IN
)
MIN
38
TYP
41
MAX
46
UNITS
dB
Output Level
Distortion -Linear
- AGC
Input Referred Noise
Compression Function Ratio
Total Amplifier Current
Regulated Voltage
Supply Rejection
V
OHIGH
THD
V
IN
= 6.32 mV, S1 closed
V
OUT
= 11.0 mV
V
IN
= 6.32mV, S1 closed
7.5
-
-
-
2
160
0.890
51
12
1
1
1.2
5
310
0.940
60
15.5
2.9
2.2
2.2
8
380
0.990
-
mV
%
%
µV
dB
µA
VDC
dB
IRN
S2 closed,NFB 0.2 to 10 kHz at 12 dB/Oct
V
IN
= 0.1 to 6.32 mV, S1 closed
I
AMP
V
REG
PSRR
All parameters and switches remain as shown in Test Circuit unless otherwise stated in "Conditions" column
I
TOT
R
GT
130k
V
B
= 1.3 VDC
7
4
2
VOLTAGE
REGULATOR
C5
1.0
R
TH
0Ω
V
OUT
C1
0.47
1
3
AMP
R
S
= 3.5k
FULL WAVE
RECTIFIER
6
S1
R
L
10K
S2
R
M
33K
C2
1.0
V
IN
C4
0.1
8
5
C3
1.0
All resistors in ohms, all capacitors in microfarads unless otherwise stated
Fig. 1 Test Circuit
500 - 43 - 18
2
GAIN TRIM
4.7
500k
7
2
V
B
=1.3 VDC
4.7
4
LD502
4
1
4.7
0.1
VOLTAGE
REGULATOR
LC549
6
5
V
C
=10k
0.1
2
1
AMP
3
R
L
=400
TYP
8
R
S
3.9k
FULL WAVE
RECTIFIER
6
8
5
0.1
3
7
NC
0.1-1.0
0.047
All resistors in ohms, all capacitors in microfarads unless otherwise stated
Fig. 2 LD502/LC549Hearing Instrument Application
GAIN TRIM
V
B
=1.3 VDC
500k
7
4.7
0.1
AMP
1
R
S
3.9k
FULL WAVE
RECTIFIER 6
5
0.47
3
0.1
V
C
10k
3
6
0.1
2
VOLTAGE
REGULATOR
2
0.1
33k
5
2k
4
8
1
7
18k
13.5k
LD502
4
LE507
25k
BK1606
Z=1k
8
R
E
=33
All resistors in ohms, all capacitors in microfarads unless otherwise stated
Fig. 3 LD502/LE507 Hearing Instrument Application
3
500 - 43 - 18
100
100
R
TH
=50k
OUTPUT (mV)
R
TH
=22k
R
TH
=10k
10
R
TH
=0k
10
OUTPUT (mV)
1
R
GT
=130k
R
GT
=82k
R
GT
=68k
R
GT
=47k
1
0.01
0.1
1.0
10
0.1
0.01
0.1
1.0
10
INPUT (mV)
INPUT (mV)
Fig. 4 I/O Characteristics at
Various R
TH
Values
Fig. 5 I/O Characteristics at
Various R
GT
Values
100
4
2
0
C
S
=0.22
µ
C
S
=0.1
µ
RELATIVE OUTPUT (dB)
R
TH
=0
-2
-4
-6
-8
-10
-12
-14
-16
-18
OUTPUT (mV)
V
B
=3 VDC
10
V
B
=1.3 VDC
C
S
=0.047
µ
C
S
=0.033
µ
0.1
0.01
0.1
1.0
10
-20
20
200
2K
20000
INPUT (mV)
FREQUENCY (Hz)
Fig. 6 Effects of Supply Voltage
Variation
Fig. 7 Frequency Response at
Various C
S
Values
4.0
3.0
REVISION NOTES
Changes to Fig.1, test conditions, Pb/Sn bump removed.
THD (%)
2.0
DOCUMENT
IDENTIFICATION
PRODUCT PROPOSAL
This data has been compiled for market investigation purposes
only, and does not constitute an offer for sale.
ADVANCE INFORMATION NOTE
This product is in development phase and specifications are
subject to change without notice. Gennum reserves the right to
remove the product at any time. Listing the product does not
constitute an offer for sale.
PRELIMINARY DATA SHEET
The product is in a preproduction phase and specifications are
subject to change without notice.
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
1.0
0.0
0.0
5.0
10.0
15.0
20.0
25.0
OUTPUT (mV)
Fig. 8 Total Harmonic Distortion
vs Output Level
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
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