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120
100
80
60
40
20
0
Dropout Voltage (mV)
-15 -10 -5 0 5 10 15
Load Current (mA)
ADS7822
V
CC
CS
D
OUT
DCLOCK
V
REF
+In
-In
GND
+
+
5W
1 F to 10 Fm m
1 F tom
10 Fm
3.3V
0.1 Fm
V
IN
V+
V
S
Microcontroller
REF3133
GND
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
REF3112
,
REF3120
,
REF3125
REF3130
,
REF3133
,
REF3140
SBVS046D –DECEMBER 2003–REVISED MARCH 2016
REF31xx 15ppm/°C Maximum, 100-µA, SOT-23 Series Voltage Reference
1
1 Features
1
• MicroSize Package: SOT23-3
• Low Dropout: 5 mV
• High Output Current: ±10 mA
• High Accuracy: 0.2% Maximum
• Low I
Q
: 115 µA Maximum
• Excellent Specified Drift Performance:
– 15 ppm/°C (Maximum) from 0°C to +70°C
– 20 ppm/°C (Maximum) from –40°C to +125°C
2 Applications
• Portable, Battery-Powered Equipment
• Data Acquisition Systems
• Medical Equipment
• Hand-Held Test Equipment
3 Description
The REF31xx is a family of precision, low power, low
dropout, series voltage references available in the
tiny 3-pin SOT-23 package.
The REF31xx's small size and low power
consumption (100 μA typical) make it ideal for
portable and battery-powered applications. The
REF31xx does not require a load capacitor, but is
stable with any capacitive load and can sink or
source up to 10 mA of output current.
Unloaded, the REF31xx can operate on supplies
down to 5 mV above the output voltage. All models
are specified for the wide temperature range of –40°C
to +125°C.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
REF31xx SOT-23 (3) 2.92 mm × 1.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
Dropout Voltage vs Load Current
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