Gennum Corporation GA3206 Datasheet

FEATURES

• 6 programmable parameters

• 38dB maximum system gain

• 8:1 compression ratio

• output compression threshold, adjustable over
22dB range

• 2nd order active low cut filter adjustable
from 530Hz to 2.0kHz

• low frequency boost

• 1st order high cut filter

• programmable or manual volume control

• multimemory

• averaging detector

thinSTAX™ PACKAGING

Hybrid typical dimensions:

0.195 x 0.110 x 0.070in.
(4.95 x 2.79 x 1.78 mm)

DESCRIPTION

The GA3206 programmable hybrid is composed of an AGC
amplifier and the GP523 controller memory chip. The hybrid
features AGC-O capability for low distortion output limiting
and offers a package size suitable for CIC instruments.

The compression circuit operates with an 8:1 compression
ratio and uses an averaging detector with a time constant of
270ms, selected to provide optimal sound quality over a full
range of sound and listening environments. The actual attack
and release times are typically 40ms and 150ms respectively
when the circuit is fully in the compression region of operation
(measured times will vary depending on gain and threshold
settings).

The GA3206 features six programmable parameters: VC
adjustment, threshold adjustment, high and low cut filters,
gain trim and low frequency boost.

Four independent memories add to the flexibility of this
hybrid.

The output stage is designed as a preamplifier for the
class␣ D integrated receiver.

The GA3206 hybrid code programmed into the GP523 is “3”.

PRELIMINARY DATA SHEET

Programmable AGC-O

CIC-size Hybrid - GA3206

BLOCK DIAGRAM

Revision Date: February 2000

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

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

Document No. 522 - 46 - 00

GA3206

GND1

0µ1

0µ15

C10

12k

48k

REGULATOR

48k

-A

RECT.

C8

-F

C4

C3

C6

10k

80k

800

V

B

GA3206

92k

64k

C11

R1

R5

C7

GP523

SDA

185k

R3

33n

45k5

R2

22n

MS VC

184k

R4

10n

6n8

15n

185k

R6

460k

R7

C2

C5

92k

R8

C12

5n

C1

0µ1

0µ1

0µ1

RVCR

TH

C

AGC

B

OUT

GNDRECT

A

OUT

A

IN

RF4A

RF4B

F

IN

V

REG

SDA MS

GND2

C9

5n

2

8:1

COMPRESSION

CONTROL

SW

V

REG

V

B

F

OUT

V

B

B

V

B

V

B

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

IN

OUT

GNDA

IN

F

OUT

4

5

6 7 3

1

8109

2

522 - 46 - 00

GA3206

PAD CONNECTION

CAUTION

ELECTROSTATIC

SENSITIVE DEVICES

DO NOT OPEN PACKAGES OR HANDLE

EXCEPT AT A STATIC-FREE WORKSTATION

ABSOLUTE MAXIMUM RATINGS

PARAMETER VALUE

Supply Voltage 2VDC
Power Dissipation 25mW
Operating Temperature Range -10°C to 40°C
Storage Temperature Range -20°C to 70°C

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NI

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SMR

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V

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∆A

V

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∆A

FL

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∆A

CL

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∆A

FH

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∆A

MIRTV

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GER

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CGA

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XAM

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NIM

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∆A

CV

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A

V

NI

VBd07-=427203Bd

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τ

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Conditions: Frequency = 1 kHz, Temperature = 25°C, Supply Voltage VB = 1.3V
The programmable parameters are adjusted to the following set values unless otherwise specified.
(THR) R1 - Tap 0, R3 - Tap 0; (VC) R5 -Tap 15; (Gain) R4 - Tap 0; (LPF) R8 - Tap 24; (HPF) R2 - Tap 15; (LF Boost) R6 - Tap 15, R7 - Tap 24; SW closed.

ELECTRICAL CHARACTERISTICS

All parameters and switches remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column.
Note: 1. A

RANGE

= AA - AA [VIN = -20dBV, R1 - Tap 15]

2. Relative to System Gain at Acoustic Peak.

MS SDA VC A

IN

F

OUT

OUT V

B

GND V

REG

IN

12345

678910

3

522 - 46 - 00

GA3206

All parameters and switches remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column.

Fig. 1 Production Test Circuit

GND1

0µ1

0µ15

C10

12k

48k

REGULATOR

48k

-A

RECT.

C8

-F

C4

C3

C6

10k

80k

800

V

B

GA3206

92k

64k

C11

R1

R5

C7

GP523

185k

R3

33n

45k5

R2

22n

184k

R4

10n

6n8

15n

185k

R6

460k

R7

C2

C5

92k

R8

C12

5n

C1

0µ1

0µ1

0µ1

RVCR

TH

C

AGC

B

OUT

GNDRECT

A

OUT

A

IN

RF4A

RF4B

F

IN

V

REG

SDA MS

GND2

C9

5n

8:1

COMPRESSION

CONTROL

SW

V

B

F

OUT

V

B

B

V

B

V

B

3k9

V

IN

50k

V

OUT

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

4

5

6 7 3

1

81092

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B

-11-Bd

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-42-kΩ

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TSOOB

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RETLIFSSAPWOL

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FPL

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Conditions: Frequency = 1 kHz, Temperature = 25°C, Supply Voltage VB = 1.3V
The programmable parameters are adjusted to the following set values unless otherwise specified.
(THR) R1 - Tap 0, R3 - Tap 0; (VC) R5 -Tap 15; (Gain) R4 - Tap 0; (LPF) R8 - Tap 24; (HPF) R2 - Tap 15; (LF Boost) R6 - Tap 15, R7 - Tap 24; SW closed.

ELECTRICAL CHARACTERISTICS continued

SUPPORT SOFTWARE

All support software for the GA3206 and the GP523 is
available from Gennum’s web site:

www.gennum.com/hip/software

R1 – Tap 0 R5 – Tap15
R2 – Tap 15 R6 – Tap 15
R3 – Tap 0 R7 – Tap 24
R4 – Tap 0 R8 – Tap 24
SW Closed

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