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REF191 Datasheet(PDF) 1 Page - Analog Devices

Part # REF191
Description  Precision Micropower, Low Dropout Voltage References
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

REF191 Datasheet(HTML) 1 Page - Analog Devices

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REV. E
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.
REF19x Series
Precision Micropower, Low Dropout
Voltage References
PIN CONFIGURATIONS
8-Lead Narrow-Body SOIC and TSSOP
(S Suffix and RU Suffix)
TP
VS
SLEEP
GND
NC
NC
OUTPUT
TP
1
2
3
4
8
7
6
5
REF19x
SERIES
TOP VIEW
(Not to Scale)
NC = NO CONNECT
TP PINS ARE FACTORY TEST POINTS,
NO USER CONNECTION
8-Lead Epoxy DIP (P Suffix)
TP
VS
SLEEP
GND
NC = NO CONNECT
TP PINS ARE FACTORY TEST POINTS,
NO USER CONNECTION
NC
NC
OUTPUT
TP
1
2
3
4
8
7
6
5
REF19x
SERIES
TOP VIEW
(Not to Scale)
FEATURES
Initial Accuracy:
2 mV Max
Temperature Coefficient: 5 ppm/ C Max
Low Supply Current: 45
A Max
Sleep Mode: 15
A Max
Low Dropout Voltage
Load Regulation: 4 ppm/mA
Line Regulation: 4 ppm/V
High Output Current: 30 mA
Short Circuit Protection
APPLICATIONS
Portable Instrumentation
A-to-D and D-to-A Converters
Smart Sensors
Solar Powered Applications
Loop Current Powered Instrumentations
GENERAL DESCRIPTION
REF19x series precision band gap voltage references use a pat-
ented temperature drift curvature correction circuit and laser
trimming of highly stable thin film resistors to achieve a very low
temperature coefficient and a high initial accuracy.
The REF19x series is made up of micropower, Low Dropout
Voltage (LDV) devices providing a stable output voltage from
supplies as low as 100 mV above the output voltage and consum-
ing less than 45
µA of supply current. In sleep mode, which is
enabled by applying a low TTL or CMOS level to the sleep pin,
the output is turned off and supply current is further reduced to
less than 15
µA.
The REF19x series references are specified over the extended
industrial temperature range (–40
°C to +85°C) with typical
performance specifications over –40
°C to +125°C for applications
such as automotive.
All electrical grades are available in 8-lead SOIC; the PDIP and
TSSOP are only available in the lowest electrical grade. Products
are also available in die form.
Test Pins (TP)
The test pins, Pin 1 and Pin 5, are reserved for in-package
Zener-zap. To achieve the highest level of accuracy at the output,
the Zener-zapping technique is used to trim the output voltage.
Since each unit may require a different amount of adjustment, the
resistance value at the test pins will vary widely from pin to pin as
well as from part to part. The user should not make any physical
nor electrical connections to Pin 1 and Pin 5.
Table I.
Part
Nominal Output
Number
Voltage (V)
REF191
2.048
REF192
2.50
REF193
3.00
REF194
4.50
REF195
5.00
REF196
3.30
REF198
4.096
ORDERING GUIDE
Temperature
Package
Package
Model
Range
Description
Option
1
REF19xGP
–40
°C to +85°C
8-Lead Plastic DIP
2
N-8
REF19xES
3
–40
°C to +85°C
8-Lead SOIC
SOIC-8
REF19xFS
3
–40
°C to +85°C
8-Lead SOIC
SOIC-8
REF19xGS
–40
°C to +85°C
8-Lead SOIC
SOIC-8
REF19xGRU
4 –40
°C to +85°C
8-Lead TSSOP
RU-8
REF19xGBC
25
°CDICE
NOTES
1N = Plastic DIP, SOIC = Small Outline, RU = Thin Shrink Small Outline.
28-lead plastic DIP is only available in “G” grade.
3REF193 and REF196 are only available in “G” grade.
4Available for REF192, REF195, and REF198 only.


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