REF2025 Datasheet, PDF (1/32 Pages) Texas Instruments – Voltage References

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REF2025, REF2030, REF2033, REF2041
SBOS600B – MAY 2014 – REVISED JULY 2014
REF20xx Low-Drift, Low-Power, Dual-Output, V_REF and V_REF / 2 Voltage References
1 Features
•1 Two Outputs, V_REF and V_REF / 2, for Convenient
Use in Single-Supply Systems
• Excellent Temperature Drift Performance:
– 8 ppm/°C (max) from –40°C to 125°C
• High Initial Accuracy: ±0.05% (max)
• V_REF and V_BIAS Tracking over Temperature:
– 6 ppm/°C (max) from –40°C to 85°C
– 7 ppm/°C (max) from –40°C to 125°C
• Microsize Package: SOT23-5
• Low Dropout Voltage: 10 mV
• High Output Current: ±20 mA
• Low Quiescent Current: 360 μA
• Line Regulation: 3 ppm/V
• Load Regulation: 8 ppm/mA
2 Applications
• Digital Signal Processing:
– Power Inverters
– Motor Controls
• Current Sensing
• Industrial Process Controls
• Medical Equipment
• Data Acquisition Systems
• Single-Supply Systems
3 Description
Applications with only a positive supply voltage often
require additional stable voltage in the middle of the
analog-to-digital converter (ADC) input range to bias
input bipolar signals. The REF20xx provides a
reference voltage (V_REF) for the ADC and a second
highly-accurate voltage (V_BIAS) that can be used to
bias the input bipolar signals.
The REF20xx offers excellent temperature drift
(8 ppm/°C, max) and initial accuracy (0.05%) on both
the V_REF and V_BIAS outputs while operating at a
quiescent current less than 430 µA. In addition, the
V_REF and V_BIAS outputs track each other with a
precision of 6 ppm/°C (max) across the temperature
range of –40°C to 85°C. All these features increase
the precision of the signal chain and decrease board
space, while reducing the cost of the system as
compared to a discrete solution. Extremely low
dropout voltage of only 10 mV allows operation from
very low input voltages, which can be very useful in
battery-operated systems.
Both the V_REF and V_BIAS voltages have the same
excellent specifications and can sink and source
current equally well. Very good long-term stability and
low noise levels make these devices ideally-suited for
high-precision industrial applications.
PART NAME
REF20xx
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
SOT (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
space
Power
Supply
Application Example
RSHUNT
ISENSE
VIN+
INA213
VOUT
VIN-
REF
VBIAS
1.5 V
GND
REF2030
EN
ADC
VREF
3.0 V
VIN
space
0.05
V_REF and V_BIAS vs Temperature
0.04
0.03
0.02
V_BIAS
0.01
0
-0.01
-0.02
-0.03
V_REF
-0.04
-0.05
±75 ±50 ±25
0 25 50 75 100 125 150
Temperature (ƒC)
C001
1
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.