Gennum Corporation GS3019 Datasheet

FEATURES

GS3019 Hybrid

with LS509 Amplifier

GS3019 - HYB DATA SHEET

• Gennum’s LS509 3 stage amplifier

• independent preamp can be used as telecoil
preamplifier

• four “must use” capacitors mounted on hybrid

• choice of 5 settings for optimal transducer
current

• easy assembly and high reliability

STANDARD PACKAGING

• Hybrid Typical Dimensions

0.276 in x 0.101 in x 0.094 in
(7.01 mm x 2.57 mm x 2.39 mm)

DESCRIPTION

The hybrid consists of Gennum's LS509 class A amplifier,
four capacitors, and two selectable bias resistors. This
hybrid is very similar to Gennum's 3010 with the exception
that capacitors C2 and C3 on the GS3019 have been
increased in value to extend the frequency response of
the system.

V

15

MIC

C1
4µ7

7

4k

8

This hybrid is very similar to Gennum's 3010 with the
exception that capacitors C2 and C3 on the GS3019 have
been increased in value to extend the frequency response
of the system. C2 and the output impedance of the
microphone form a high pass filter with a corner frequency
of approximately 180 Hz. The hybrid allows for easy
adjustment of this corner frequency via the addition of
components to its many additional solder pads. Likewise,
R3 and C3 form a high pass filter with a corner frequency
of 130 Hz. Altering this frequency is easily accomplished
by adding additional capacitance between pads 12 and 2
on the hybrid.

Stage C of the LS509 is a class A current drive output. There
is a fixed reference voltage of typically 29 mV at pin 2 of the
chip (pad 5 of the hybrid). The current that flows in the
receiver is the ratio of this 29 mV reference voltage to the
resistance seen from pin 2 to ground. R1 and R2 have been
included on the GS3019 to allow for easy adjustment of the
current for the most commonly used receivers.

The system also has the capability of MPO (Maximum Power
Output) control. This is provided by the Schottky diodes on
the LS509 die. To make use of the diodes in the system, a
potentiometer must be added from pads 7 to 9 on the hybrid.

V

B

8

V

CC

9

GS3019

C4
0µ1

7

MPO

21k

10

R

1

2

E

R1
58

17

R2
98

11

18

MGND

C2

16

IN

220n

1

14

A IN A OUT A OUTR B INC B IN B OUT GND GND1 R1 GND2 R2 R3

All resistors in ohms, all capacitors in farads unless otherwise stated.

A

-

6

LS509 - DIE

3

R3
5k6

5

12 2

4

C3
220n

B

-

3

13

C

-

125

4

65

FUNCTIONAL BLOCK DIAGRAM

Revision Date: May 1998

GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone]

Web Site: www.gennum.com E-mail: [e-mail]

9

OUT

10

Document No. 521 - 04 - 02

ABSOLUTE MAXIMUM RATINGS

PAD CONNECTION

PARAMETER VALUE/UNITS

B

A

INC

2

14

A

IN

B

OUT BOUT

3

13

IN AOUTR

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

CAUTION

MGND

V

MIC

1

16

IN

15

CLASS 1 ESD SENSITIVITY

ELECTRICAL CHARACTERISTICS Conditions: Frequency = 3 kHz, Temperature = 25°C, Supply Voltage V

B

4

12

= 1.3 V

R3 GND

5

17

10

11

R1 R2

GND1

6

18

GND2

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Amplifier Current I

Transducer Current I

Transducer Current I

Transducer Current I

TRANS 1

TRANS 2

TRANS 3

Bias Voltage (Pad 15) V

Bias Voltage (Pad 5) V

AMP

S1 = Closed, S3 = Closed 450 520 600 µA
S1 = Closed, S2 = Closed 650 725 820 µA

P15

P5

75 160 245 µA

175 225 290 µA

1.27 1.3 - V

21.5 28.5 35.5 mV

System Voltage Gain Gain VIN = -90 dBV 61.5 64.5 67.5 dB

Maximum Power Output MPO VIN = -60 dBV -17 -12 -9 dBV

7

MPO

8

V

B

9

OUT

All conditions and parameters remain as shown in the Test Circuit unless otherwise specified in CONDITIONS Column.

V

- Actual voltage measured on the pin at given condition (X is pin number).

PX

Notes: 1. All capacitors on Hybrid ±20%, all screened on resistors ±5%.

1.3V

15

C1
4µ7

R

S

3k9

V

IN

C2

16

220n

1

1

14

All resistors in ohms, all capacitors
in farads unless otherwise stated.

7

A

-

6

LS509 - DIE

R

GT

47k5

8

V

CC

4

C3
220n

8

9

21k

B

-

3

13

R

VC

47k5

C

-

125

4

65

10

2

R

E

1

17

4k

5

R3
5k6

3

12 2

S2

R1
58

GS3019

C4
0µ1

R2
98

11

10

18

S3

Fig. 1 Production Test Circuit

7

2k7

S1

9

V

OUT

521 - 04 - 02

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