THIS DOCUMENT IS FOR MAINTENANCE
PURPOSES ONLY AND IS NOT
RECOMMENDED FOR NEW DESIGNS
REF50Z/REF50D
5V MICROPOWER PRECISION REFERENCE
JUNE 1993
The REF50Z and REF50D are integrated circuits using
the bandgap principle to provide a precise stable reference
voltage of 5V. There are two package options available:
REF50Z in a plastic 3-pin TO-92 and REF50D in a miniature
surface mount package (MP8).
These references feature a recommended operating cur-
rent of 60µA to 5mA which make them ideal for all low power
and battery applications.
DS2427 - 1.0
FEATURES
■Low Knee Current - typically 40 microamps
■Ideal for Battery Operation - 300 microwatts
■Internally Shaped
■REF50Z - 3 lead TO-92 Plastic Package
■REF50D - Miniature Plastic Surface Mount Package
(MP8)
■Tight Initial VREF Tolerance ±1.5%
■Low Temperature Coefficient
■Low Slope Resistance
■Operation over Industrial Temperature Range
Device Type Operating Temperature Package
REF50Z -40°C to +85°C TO-92
REF50D -40°C to +85°C MP8
ORDERING INFORMATION
Fig.1 Pin connection
ABSOLUTE MAXIMUM RATINGS
Reference current 5mA
Operating temperature range:
REF50Z -40 to +85°C
REF50D -40 to +85°C
Storage temperature -55 to +125°C
Storage temperature for a max. time of 10ns:
within 1.59mm of seating plane 300°C
within 0.80mm of seating plane 265°C
Fig.2 Internal connections
REF50Z/50D
2
REF 50Z
REF50D
REF25Z
Note 2
REF25D
1kHz tp 10kHz
ELECTRICAL CHARACTERISTICS
Test conditions (unless otherwise stated)
Tamb = 25°C, IREF = 150µA
Output voltage
Slope resistance (Note 1)
Turn-on (knee) current
Recommended operating
current range
Temperature coefficient
(Note 2)
RMS noise voltage
Turn-on time
Turn-off time
Turn-on time
Turn-off time
VREF
RREF
ION
IREF
TC VREF
EN
TON
TOFF
TON
TOFF
4.925
0.06
5.00
3.0
3.0
40
35
35
13
80
7
65
2
5.075
3.5
3.5
5.0
110
80
V
Ω
Ω
µA
µA
ppm/°C
ppm/°C
µV
µs
µs
µs
µs
Characteristics Symbol Units Conditions
Value
Min. Typ. Max.
NOTES
1. Slope resistance (RREF)
Slope resistance is defined as
RREF = Change in VREF over a specified current range
The change in reference current
2. Reference voltage temperature coefficient (TC VREF)
This is the normalised reference voltage change over temperature, divided by the change in temperature.
It is expressed in ppm/°C
TC VREF = ∆VREF X 106 ppm/°C
VREF X ∆T
∆T = temperature change in °C
∆VREF = change in reference voltage over temperature change ∆T
IREF = 150µA
to 5mA
IREF = 500µA
REF50Z/50D
3
Fig.3 Connections diagram
REF50Z/50D
4
Fig.4 Typical reference characterics
Fig.5 Typical temperature at I
REF
= 150
µ
A
REF50Z/50D
5
Fig.6 Typical dynamic impedance at I
REF
= 5mA
REF50Z/50D
6
Fig.7 Typical response time (not to scale)
Fig.7 Typical response time (not to scale)
REF50Z/50D
7
REF50Z/50D
8
HEADQUARTERS OPERATIONS
GEC PLESSEY SEMICONDUCTORS
Cheney Manor, Swindon,
Wiltshire SN2 2QW, United Kingdom.
Tel: (0793) 518000
Fax: (0793) 518411
GEC PLESSEY SEMICONDUCTORS
Sequoia Research Park, 1500 Green Hills Road,
Scotts Valley, California 95066,
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 Tx: 602858F
Fax : (1) 64 46 06 07
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• ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993
• JAPAN Tokyo Tel: (03) 3296-0281 Fax: (03) 3296-0228
• NORTH AMERICA Integrated Circuits and Microwave Products Scotts Valley, USA
Tel (408) 438 2900 Fax: (408) 438 7023.
Hybrid Products, Farmingdale, USA Tel (516) 293 8686
Fax: (516) 293 0061.
• SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872
• SWEDEN Stockholm, Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
• UNITED KINGDOM & SCANDINAVIA
Swindon Tel: (0793) 518510 Tx: 444410 Fax : (0793) 518582
These are supported by Agents and Distributors in major countries world-wide.
GEC Plessey Semiconductors 1993 Publication No. DS2427 Issue No. 1.0 June 1993
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 Company
reserves the right to alter without prior knowledge the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute
any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information
and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury
or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.
8-LEAD MINIATURE PLASTIC DIL - MP8
3-LEAD PLASTIC-TO-92
