ZN428

BIPOLAR ADJUSTMENT PROCEDURE

(i) Set all bits to OFF (low) with ENABLE low and adjust

offset until the amplifier output reads -full-scale.

(ii) Set all bits ON (high) and adjust gain until the

amplifier output reads +(full-scale - 1LSB).

BIPOLAR SETTING UP POINTS

1LSB = 2FS

256

Input Range,

± FS

LSB

-FS

+(FS -

1LSB)

±5V

39.1 mV

-5.0000V

+4.9609V

±10V

78.1mV

-10.0000V

9.9219V

Fig.10 Bipolar operation - component values

BIPOLAR LOGIC CODING

Input Code

(Offset Binary)

Analog Output

(Nominal Value)

11111111

11111110

11000000

10000001

10000000

01111111

01000000

00000001

00000000

+(FS - 1LSB)

+(FS - 2 LSB)

+ 1LSB

0

-1 LSB

-(FS - 1LSB)

-FS

HEADQUARTERS OPERATIONS

GEC PLESSEY SEMICONDUCTORS

Cheney Manor, Swindon,

Wiltshire, United Kingdom. SN2 2QW

Tel: (0793) 518000

Fax: (0793) 518411

GEC PLESSEY SEMICONDUCTORS

P.O. Box 660017,

1500 Green Hills Road,

Scotts Valley, California 95067-0017,

United States of America.

Tel (408) 438 2900

Fax: (408) 438 5576

CUSTOMER SERVICE CENTRES

• FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Fax: (1) 64 46 06 07

• GERMANY Munich Tel: (089) 3609 06-0 Fax: (089) 3609 06-55

• ITALY Milan Tel: (02) 66040867 Fax: (02)66040993

• JAPAN Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510

• NORTH AMERICA Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 7023

• SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872

• SWEDEN Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36

• TAIWAN, ROC Taipei Tel: 886 2 5461260 Fax: 886 2 7190260

• UK, EIRE, DENMARK, FINLAND & NORWAY

Swindon Tel: (0793) 518510 Fax: (0793) 518582

These are supported by Agents and Distributors in major countries world-wide.

© GEC Plessey Semiconductors 1994 Publication No. DS3007 Issue No. 2.1 August 1994

TECHNICAL DOCUMENTATION - NOT FOR RESALE. PRINTED IN UNITED KINGDOM

This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be

regarded as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The