GENNUM GS3015

V.C. Preamp Hybrid
for Class D
GS3015 - HYB DATA SHEET
DESCRIPTION
FEATURES
• Gennum's GL504 preamp
The GS3015 incorporates Gennum's GL504 preamp, three of
the required capacitors and a mid supply referencing 48K
resistor. All that is required for a fully functional hearing aid
system is the addition of a microphone, receiver, volume
control, interstage coupling capacitor and an MPO adjusting
potentiometer.
• mounts on back of Microtronic PJ88S VC Socket
• low external parts count
• designed to drive Class D integrated receivers
• adjustable peak clipper
• low current drain (150 µA) typical
The GS3015 has been designed to mount on the back of the
Microtronics PJ88S Socket Volume Control. This translates to
a saving in space within the hearing instrument, as the circuitry
mounts directly beneath the volume control. If the VC requires
replacing, it is a simple procedure to remove the defective unit
from the socket and install a new device. This does not disturb
the electronic circuitry.
• low noise and distortion
STANDARD PACKAGING
• Hybrid Typical Dimensions
0.192 in x 0.194 in x 0.113 in
(4.88 mm x 4.93 mm x 2.85 mm)
The major advantage of the GL504 over other preamplifiers is
the electronic MPO adjustment. Since conventional MPO is not
possible in a class D receiver, Gennum provides it in the
preamp.
10 VB
RMIC
VMIC 2
C1 6
3µ3
RPULL
-A
AIN 11
-B
5
C2
47n
4 VREC
7
C3
47n
1 BOUT
8
R1
48K
4
3
6
CIN
CT
5
3
7
AOUT BIN
1
2
9
8
GND MPO
GS3015
HYBRID
All resistors in ohms, all capacitors
in farads unless otherwise stated
BLOCK DIAGRAM
Revision Date: May 1998
Document No. 520 - 92 - 05
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: [email protected]
PIN CONNECTION
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE/UNITS
Supply Voltage
3 V DC
Power Dissipation
25 mW
Operating Temperature Range
-10°C to +40° C
Storage Temperature Range
-20°C to +70° C
AOUT
VREC
5
CT
BIN
4
6
CIN
3
7
VMIC
2
CAUTION
CLASS 1 ESD SENSITIVITY
MPO
8
9
GND
10
11
VB
AIN
BOUT
1
TOP VIEW
ELECTRICAL CHARACTERISTICS
Conditions: Frequency = 1 kHz, Temperature = 25°C
PARAMETER
Amplifier Current
System Gain
Maximum Output
MPO Range
SYMBOL
IAMP
AV
MPO
∆MPO
CONDITIONS
MIN
TYP
75
150
225
µA
V IN = -80 dBV, R MPO = 0Ω, Freq.= 5 kHz
44.5
46.5
48.5
dB
V IN = -50 dBV, R MPO = 0Ω
-16
-14
-12
dBV
V IN = -50 dBV, R MPO = 10 kΩ
10
12
14
dB
-
2
-
µVRMS
V IN = 0, RMPO = 0Ω
UNITS
Input Referred Noise
IRN
Distortion
THD
-
<1.0
-
%
On Chip Pull-up Resistance
RPULL
-
48
-
kΩ
On Chip Microphone Resistor
RMIC
-
4
-
kΩ
Mic Decoupling Capacitor
C1
-20%
3.3
+20%
µF
Input Coupling Capacitor
C2
-10%
0.047
+10%
µF
Output Coupling Capacitor
C3
-10%
0.047
+10%
µF
Output Resistor
R1
-5%
48
+5%
kΩ
R OUT
-
24
-
kΩ
Output Impedance (Pad 1)
NFB 0.2 to 10 kHz at 12 dB/oct
MAX
All parameters and switches remain as shown in Test Circuit unless otherwise stated in "Conditions" column
520 - 92 - 05
2
10
RMIC
2
IAMP
RPULL
C3
47n
-B
5
C2
47n
4
7
-A
11
3.92K
1.3 VDC
C1 6
3µ3
VOUT
1
8
R1
48K
V IN
1kHz
3
4
3
6
7
5
2
1
9
GS3015
HYBRID
8
RMPO=10K
47n
RFA=100K
All resistors in ohms, all capacitors in farads unless otherwise stated
Fig.1 Production Test Circuit
1.3 VDC
10
RMIC
2
MIC
C1 6
3µ3
RPULL
-A
11
-B
5
C2
47n
VC SWITCH
4
7
C3
47n
1
8
1µ
CLASS D
INTEGRATED
RECEIVER
R1
48K
4
3
6
3
7
5
2
1
9
47n
8
GS3015
HYBRID
RMPO
10K
VC
All resistors in ohms, all capacitors in farads unless otherwise stated
Fig. 2 Typical Hearing Instrument Application
3
520 - 92 - 05
-10
-15
-15
-25
-20
-35
-45
R VC=33K
R MPO=3.3k
OUTPUT (dBV)
OUTPUT (dBV)
R MPO=0Ω
RVC=100K
R VC=10K
-55
-65
RVC=3.3K
-25
-35
-75
-40
-85
-45
-95
-140
-120
-100
-80
-60
-40
RMPO=10k
-30
-50
-100
-20
-90
-80
INPUT (dBV)
9
-2
8
-4
-8
C=0.1µ
-12
C=0.22µ
4
3
2
1
-20
200
2K
0
20K
-90
-86
FREQUENCY (Hz)
-78
-74
-70
-66
-62
-58
Fig. 6 Distortion vs Input Level (RVC=100kΩ)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
-82
INPUT (dBV)
Fig. 5 Frequency Response for Various C||C2 Values
RELATIVE AMPLIFIER CURRENT (µA)
-20
5
-18
5
10
15
20
25
30
RMPO (kΩ)
Fig. 7 Relative Amplifier Current vs MPO Resistance
520 - 92 - 05
-30
6
-16
20
-40
7
C=0
THD (%)
RELATIVE OUTPUT (dB)
10
0
-14
-50
Fig. 4 I / O for Various R MPO Values
2
-10
-60
INPUT (dBV)
Fig. 3 I / O for Various RVC Values
-6
-70
4
-10
55
No Load
-14
-18
50
GAIN (dB)
-26
50K Load
-30
-34
45
-38
40
-42
-46
-50
35
0
10
100
1K
10K
100K
10
100
1K
10K
100K
RMPO (Ω)
FREQUENCY (Hz)
Fig. 8 Output vs MPO Resistance
Fig. 9 Preamplifier A Open Loop Voltage Gain
TOP VIEW
5
4
6
0.194
(4.93)
OUTPUT (dBV)
-22
3
3015
7
8
XXXXXX
2
10
1
9
11
0.192
(4.88)
8
0.063 MAX
(1.60)
10
9
11
0.080 MAX
(2.03)
1
0.123MAX
(3.13)
C3
7
2
C1
C2
6
5
3
Dimensioning units are inches. Dimensions shown in
parenthesis are in millimetres, converted from inches
and include minor round off errors 1.0000 inches = 25.4mm.
4
Minimum pad size 0.015in x 0.025in (0.38mm x 0.64mm).
Pad numbers & capacitor numbers for illustration only.
BOTTOM VIEW
Dimensions tolerances:+0.013in -0.002in (+0.33mm -0.05mm)
unless otherwise stated.
XXXXXX - work order number.
Fig. 10 Hybrid Layout and Dimensions
5
520 - 92 - 05