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