Gennum Corporation GC590 Datasheet

FEATURES

• current mode class H output stage

• current drive power amp

• low distortion / low noise

• low amplifier current 190

µA typical

STANDARD PACKAGING

• Chip (84 x 112 mils)

DESCRIPTION

The GC590 is a linear amplifier system containing three
amplifier stages.

This product incorporates a current mode class H power
amplifier.

By adapting the bias of the output stage to the requirements
of the signal being processed, significant current savings
can be realised compared to traditional class A amplifiers.

The adaptive action does not compromise the characteristics
of a current drive output stage.

In addition to the output stage, two additional stages of
preamplification are provided to allow filtering and gain
adjustment to be easily accomplished.

Document No. 521 - 31 - 01

GC590 - DATA SHEET

Linear Class H Amplifier

GND

B

OUT

-

A

10

170

7

B

IN

24k

12k

4

6

12

11

13

5

-

GC590

A

OUT

A

IN

V

REG

REC

9

3

2

1

14

8

CONTROL

V

B

125

12k

V

REG

B

+

-

+

-

C

OUT

R

E

R

E1

V

B

C

SA

IN

B

INR

V

B

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

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]

2

521 - 31 - 01

VB C

OUT REC

GND R

E1 AOUT

CHIP PIN CONNECTION

CAUTION

CLASS 1 ESD SENSITIVITY

ABSOLUTE MAXIMUM RATINGS

PARAMETER VALUE / UNITS

Supply Voltage 5 VDC

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

Conditions: Frequency = 1 kHz, Temperature 25 °C, Voltage Supply = 1.3 VDC

ELECTRICAL CHARACTERISTICS

Notes: 1. Headroom = 20 Log (V

RE DC

/ V

REACRMS

) [VIN

=

-70 dBV]

A

IN

V

REG

C

SA

R

EC BIN BOUT BINR

IN

1 2 3 4 5 6

14 13 12 11 10 9

7

8

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OVERALL

Amplifier Current I

AMP

80 190 300 µA

Minimum Operating Voltage V

B

- - 1.1 V

Overall Gain A

V

51 54 57 dB

Distortion THD V

IN

= -40 dBV - 0.2 1 %

R

TRIM

= R

VC =

10 kΩ

Input Referred Noise IRN A Weighted Filter - - 2.5 µVRMS

VOLTAGE REGULATOR

Regulator Voltage V

REG

I

LOAD

= 30 µA 870 920 970 mVDC

Output Noise A Weighted - 2.9 - µVRMS

STAGE A AND STAGE B

Input Bias Current I

BIAS

-25 0 25 nA

DC Voltage Gain Stage A A

OL -A

-52 -dB

Stage B A

OL -B

-42 -dB

Current Source Capabilities I

SOURCE

15 30 - µA

Output Voltage Swing - Low V

SINK

260 315 - mV

STAGE C AND CONTROL CIRCUIT

Maximum Current Sinking I

SINK

RE grounded, V

P4

= 1.3 V 3 6 - mA

Output Impedance R

OUT

-24 -kΩ

Minimum Emitter Voltage V

RE-MIN

25 9mV

Maximum Emitter Voltage V

RE-MAX

62 66 74 mV

Minimum Transducer Current I

T-MIN

R

E, RE1

shorted 26 71 126 µA

Maximum Transducer Current I

T-MAX

R

E, RE1

shorted 750 930 1100 µA

Maximum/Minimum Transducer I

RANGE

16 20 28 dB

Current Ratio

Dynamic Headroom Headroom Note 1 14 17 22 dB

Time Constant T

C

- 100 - mS

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