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REF191ESADN/a3avaiPrecision Micropower, Low Dropout, Voltage References
REF191FSADIN/a9avaiPrecision Micropower, Low Dropout, Voltage References
REF191GPADIN/a4avaiPrecision Micropower, Low Dropout, Voltage References
REF191GSADIN/a28avaiPrecision Micropower, Low Dropout, Voltage References
REF192ESADN/a12avaiPrecision Micropower, Low Dropout, Voltage References
REF192FSADN/a100avaiPrecision Micropower, Low Dropout, Voltage References
REF192FSADIN/a15avaiPrecision Micropower, Low Dropout, Voltage References
REF192GPADIN/a6avaiPrecision Micropower, Low Dropout, Voltage References
REF192GSADN/a1787avaiPrecision Micropower, Low Dropout, Voltage References
REF193GSADIN/a35avaiPrecision Micropower, Low Dropout, Voltage References
REF194FSAD ?N/a11avaiPrecision Micropower, Low Dropout, Voltage References
REF194GPADN/a49avaiPrecision Micropower, Low Dropout, Voltage References
REF194GSADN/a496avaiPrecision Micropower, Low Dropout, Voltage References
REF194GSADIN/a500avaiPrecision Micropower, Low Dropout, Voltage References
REF195ESADIN/a278avaiPrecision Micropower, Low Dropout, Voltage References
REF195FSADN/a6463avaiPrecision Micropower, Low Dropout, Voltage References
REF195GPPMIN/a15avaiPrecision Micropower, Low Dropout, Voltage References
REF195GSADN/a1049avaiPrecision Micropower, Low Dropout, Voltage References
REF196GPADIN/a4avaiPrecision Micropower, Low Dropout, Voltage References
REF196GSADIN/a30avaiPrecision Micropower, Low Dropout, Voltage References
REF198ESADN/a207avaiPrecision Micropower, Low Dropout, Voltage References
REF198ESBBN/a5avaiPrecision Micropower, Low Dropout, Voltage References
REF198ESADIN/a200avaiPrecision Micropower, Low Dropout, Voltage References
REF198FSADN/a1500avaiPrecision Micropower, Low Dropout, Voltage References
REF198GPBBN/a5avaiPrecision Micropower, Low Dropout, Voltage References
REF198GPADN/a346avaiPrecision Micropower, Low Dropout, Voltage References
REF198GSADN/a1814avaiPrecision Micropower, Low Dropout, Voltage References
REF198GSAD ?N/a6avaiPrecision Micropower, Low Dropout, Voltage References
REF198GSADIN/a200avaiPrecision Micropower, Low Dropout, Voltage References


REF195FS ,Precision Micropower, Low Dropout, Voltage Referencesspecifications over –40

REF191ES-REF191FS-REF191GP-REF191GS-REF192ES-REF192FS-REF192GP-REF192GS-REF193GS-REF194FS-REF194GP-REF194GS-REF195ES-REF195FS-REF195GP-REF195GS-REF196GP-REF196GS-REF198ES-REF198FS-REF198GP-REF198GS
Precision Micropower, Low Dropout, Voltage References
Table I
ORDERING GUIDE

REF19xES
NOTESN = Plastic DIP, SO = Small Outline, RU = Thin Shrink Small Outline.8-Lead plastic DIP only available in “G” grade.REF193 and REF196 are available in “G” grade only.
PIN CONFIGURATIONS
Precision Micropower, Low Dropout,
Voltage References
8-Lead Narrow-Body SO and TSSOP
(S Suffix and RU Suffix)

REV.D
8-Lead Epoxy DIP (P Suffix)
SLEEP
GND
NC = NO CONNECT
TP PINS ARE FACTORY TEST POINTS
NO USER CONNECTION
OUTPUT
FEATURES
Initial Accuracy: 62 mV max
Temperature Coefficient: 5 ppm/°C max
Low Supply Current: 45 mA max
Sleep Mode: 15 mA 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 bandgap 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 are micropower, Low Dropout Voltage
(LDV) devices providing a stable output voltage from supplies
as low as 100 mV above the output voltage and consuming less
than 45 mA 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 mA.
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 applica-
tions such as automotive.
All electrical grades are available in 8-Lead SOIC; the PDIP and
TSSOP are only available in the lowest electrical grade. Prod-
ucts 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 out-
put, the zener-zapping technique is used to trim the output
voltage. Since each unit may require a different amount of ad-
justment, 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.
REF19x Series
REF191–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LOAD REGULATION
DROPOUT VOLTAGE
NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

SUPPLY CURRENT
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.
(@ VS = 3.3 V, TA = +258C unless otherwise noted)
(@ VS = 3.3 V, –408C £ TA £ +858C unless otherwise noted)
REF191–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LOAD REGULATION
DROPOUT VOLTAGE
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
REF19x Series
(@ VS = 3.3 V, –408C £ TA £ +1258C unless otherwise noted)
REF19x Series
REF192–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).
(@ VS = 3.3 V, TA = +258C unless otherwise noted)
(@ VS = 3.3 V, TA = –408C £ TA £ +858C unless otherwise noted)
REF192–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
REF19x Series
(@ VS = 3.3 V, –408C £ TA £ +1258C unless otherwise noted)
REF193–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
(@ VS = 3.3 V, TA = +258C unless otherwise noted)
REF19x Series
REF193–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
(@ VS = 3.3 V, –408C £ TA £ +1258C unless otherwise noted)
(@ VS = 3.3 V, TA = –408C £ TA £ +858C unless otherwise noted)
REF194–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

SLEEP PIN
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.
REF19x Series
(@ VS = 5.0 V, TA = –408C £ TA £ +858C unless otherwise noted)
(@ VS = 5.0 V, TA = +258C unless otherwise noted)
REF19x Series
REF194–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
(@ VS = 5.0 V, –408C £ TA £ +1258C unless otherwise noted)
REF195–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

LINE REGULATION
LOAD REGULATION
DROPOUT VOLTAGE
SLEEP PIN
SUPPLY CURRENT
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.
REF19x Series
(@ VS = 5.15 V, TA = –408C £ TA £ +858C unless otherwise noted)
(@ VS = 5.10 V, TA = +258C unless otherwise noted)
REF19x Series
REF195–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
REF196–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
LOAD REGULATION
NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
(@ VS = +5.20 V, –408C £ TA £ +1258C unless otherwise noted)
(@ VS = +3.5 V, TA = +258C unless otherwise noted)
REF196–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
SUPPLY CURRENT
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.Line and load regulation specifications include the effect of self-heating.
Specifications subject to change without notice.
REF19x Series
(@ VS = +3.50 V, –408C £ TA £ +1258C unless otherwise noted)
(@ VS = +3.5 V, TA = –408C £ TA £ +858C unless otherwise noted)
REF19x Series
REF198–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS

LINE REGULATION
NOTESInitial accuracy includes temperature hysteresis effect.Line and load regulation specifications include the effect of self-heating.Long-term drift is guaranteed by 1000 hours life test performed on three independent wafer lots at +125°C, with an LTPD of 1.3.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICS

NOTESFor proper operation, a 1 mF capacitor is required between the output pin and the GND pin of the device.TCVO is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVO = (V max–V min)/VO (TMAX–TMIN).Guaranteed by characterization.
(@ VS = 5.0 V, TA = +258C unless otherwise noted)
(@ VS = +5.0 V, –408C £ TA £ +858C unless otherwise noted)
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