REF191 Datasheet, PDF (1/24 Pages) Analog Devices – Precision Micropower, Low Dropout Voltage References

Precision Micropower, Low Dropout
Voltage References
REF19x Series
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.
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.
PIN CONFIGURATIONS
8-Lead Narrow-Body SOIC and TSSOP
(S Suffix and RU Suffix)
TP 1
8 NC
V_S 2
REF19x
SERIES
7 NC
SLEEP ³ TOP VIEW ^{6 OUTPUT}
(Not to Scale)
GND 4
5 TP
NC = NO CONNECT
TP PINS ARE FACTORY TEST POINTS,
NO USER CONNECTION
8-Lead Epoxy DIP (P Suffix)
TP 1
V_S 2
REF19x
SERIES
8 NC
7 NC
SLEEP 3 ^{TOP VIEW} 6 OUTPUT
(Not to Scale)
GND 4
5 TP
NC = NO CONNECT
TP PINS ARE FACTORY TEST POINTS,
NO USER CONNECTION
Part
Number
REF191
REF192
REF193
REF194
REF195
REF196
REF198
Table I.
Nominal Output
Voltage (V)
2.048
2.50
3.00
4.50
5.00
3.30
4.096
ORDERING GUIDE
Model
Temperature
Range
Package
Description
Package
Option¹
REF19xGP –40°C to +85°C
REF19xES³ –40°C to +85°C
REF19xFS³ –40°C to +85°C
REF19xGS –40°C to +85°C
REF19xGRU⁴ –40°C to +85°C
REF19xGBC 25°C
8-Lead Plastic DIP²
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead TSSOP
DICE
N-8
SOIC-8
SOIC-8
SOIC-8
RU-8
NOTES
1_{N = Plastic DIP, SOIC = Small Outline, RU = Thin Shrink Small Outline.}
2_{8-lead plastic DIP is only available in “G” grade.}
3_{REF193 and REF196 are only available in “G” grade.}
4_{Available for REF192, REF195, and REF198 only.}
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