FEATURES
Voltage Options 2.048 V, 2.500 V and 4.096 V
2.7 V to 15 V Supply Range
Supply Current 12 A max
Initial Accuracy ⴞ2 mV max
Temperature Coefficient 8 ppm/ⴗC max
Low-Noise 6 V p-p (0.1 Hz–10 Hz)
High Output Current 5 mA min
Temperature Range ⴚ40ⴗC to ⴙ125ⴗC
REF02/REF19x Pinout
APPLICATIONS
Portable Instrumentation
Precision Reference for 3 V and 5 V Systems
A/D and D/A Converter Reference
Solar Powered Applications
Loop-Current Powered Instruments
GENERAL DESCRIPTION
The ADR290, ADR291 and ADR292 are low noise, micropower precision voltage references that use an XFET
circuit. The new XFET
architecture offers significant performance improvements over traditional bandgap and Zener-based
references. Improvements include: one quarter the voltage noise
output of bandgap references operating at the same current,
very low and ultralinear temperature drift, low thermal hysteresis and excellent long-term stability.
The ADR29x family are series voltage references providing stable
and accurate output voltages from supplies as low as 2.7 V. Output voltage options are 2.048 V, 2.5 V and 4.096 V for the
ADR290, ADR291 and ADR292 respectively. Quiescent current
is only 12 µA, making these devices ideal for battery powered in-
strumentation. Three electrical grades are available offering initial
output accuracies of ±2 mV, ±3 mV and ±6 mV max for the
ADR290 and ADR291 and ±3 mV, ±4 mV and ±6 mV max for
the ADR292. Temperature coefficients for the three grades are
8 ppm/°C, 15 ppm/°C and 25 ppm/°C max, respectively. Line
regulation and load regulation are typically 30 ppm/V and
30 ppm/mA, maintaining the reference’s overall high performance. For a device with 5.0 V output, refer to the ADR293
data sheet.
The ADR290, ADR291 and ADR292 references are specified
over the extended industrial temperature range of –40°C to
+125°C. Devices are available in the 8-lead SOIC, 8-lead TSSOP
and the TO-92 package.
™
reference
Precision Voltage References
ADR290/ADR291/ADR292
PIN CONFIGURATIONS
8-Lead Narrow Body SO (R Suffix)
PIN 3
V
OUT
8
7
V
6
OUT
5
8
7
V
6
OUT
5
1
ADR29x
V
2
IN
TOP VIEW
(Not to Scale)
3
GND
4
8-Lead TSSOP (RU Suffix)
1
ADR29x
V
2
IN
TOP VIEW
(Not to Scale)
3
GND
4
3-Pin TO-92 (T9 Suffix)
PIN 1
PIN 2
V
GND
IN
BOTTOM VIEW
Part NumberNominal Output Voltage (V)
ADR2902.048
ADR2912.500
ADR2924.096
XFET is a trademark of Analog Devices, Inc.
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
NOTE
Specifications subject to change without notice.
–2–
REV. A
ADR291–SPECIFICATIONS
ADR290/ADR291/ADR292
Electrical Specifications
(VS= ⴙ3.0 V, TA = ⴙ25ⴗC unless otherwise noted)
ParameterSymbolConditionsMinTypMaxUnits
INITIAL ACCURACY
“E” GradeV
O
I
= 0 mA2.4982.500 2.502V
OUT
“F” Grade2.4972.503V
“G” Grade2.4942.506V
LINE REGULATION
“E/F” Grades∆V
O
/∆V
IN
3.0 V to 15 V, I
= 0 mA30100ppm/V
OUT
“G” Grade40125ppm/V
LOAD REGULATION
“E/F“ Grades∆V
O
/∆I
LOAD
VS = 5.0 V, 0 mA to 5 mA30100ppm/mA
“G“ Grade40125ppm/mA
LONG TERM STABILITY∆V
NOISE VOLTAGEe
WIDEBAND NOISE DENSITYe
Electrical Specifications
N
n
(V
= ⴙ3.0 V, T
S
O
1000 hrs @ +25°C, V
= +15 V0.2ppm
S
0.1 Hz to 10 Hz8µV p-p
at 1 kHz480nV/√Hz
= ⴚ25ⴗC ≤ TA ≤ⴙ85ⴗC unless otherwise noted)
A
ParameterSymbolConditionsMinTypMaxUnits
TEMPERATURE COEFFICIENT
“E” GradeTCV
/°CI
O
= 0 mA38ppm/°C
OUT
“F” Grade515ppm/°C
“G” Grade1025ppm/°C
LINE REGULATION
“E/F” Grades∆V
O
/∆V
IN
3.0 V to 15 V, I
= 0 mA35125ppm/V
OUT
“G” Grade50150ppm/V
LOAD REGULATION
“E/F” Grades∆V
O
/∆I
LOAD
VS = 5.0 V, 0 mA to 5 mA20125ppm/mA
“G” Grade30150ppm/mA
Electrical Specifications
(VS= ⴙ3.0 V, T
= ⴚ40ⴗC ≤ TA ≤ⴙ125ⴗC unless otherwise noted)
A
ParameterSymbolConditionsMinTypMaxUnits
TEMPERATURE COEFFICIENT
“E” GradeTCV
/°CI
O
= 0 mA310ppm/°C
OUT
“F” Grade520ppm/°C
“G” Grade1030ppm/°C
LINE REGULATION
“E/F” Grades∆V
O
/∆V
IN
3.0 V to 15 V, I
= 0 mA40200ppm/V
OUT
“G” Grade70250ppm/V
LOAD REGULATION
“E/F” Grades∆V
O
/∆I
LOAD
VS = 5.0 V, 0 mA to 5 mA20200ppm/mA
“G” Grade30300ppm/mA
SUPPLY CURRENT@ +25°C912µA
1215µA
THERMAL HYSTERESISTO-92, SO-8, TSSOP-850ppm
NOTE
Specifications subject to change without notice.
REV. A
–3–
ADR290/ADR291/ADR292
ADR292–SPECIFICATIONS
Electrical Specifications
(V
= ⴙ5 V, TA = ⴙ25ⴗC unless otherwise noted)
S
ParameterSymbolConditionsMinTypMaxUnits
INITIAL ACCURACY
“E” GradeV
O
I
= 0 mA4.0934.096 4.099V
OUT
“F” Grade4.0924.100V
“G” Grade4.0904.102V
LINE REGULATION
“E/F” Grades∆V
O
/∆V
IN
4.5 V to 15 V, I
= 0 mA30100ppm/V
OUT
“G” Grade40125ppm/V
LOAD REGULATION
“E/F” Grades∆V
O
/∆I
LOAD
VS = 5.0 V, 0 mA to 5 mA30100ppm/mA
“G” Grade40125ppm/mA
LONG TERM STABILITY∆V
NOISE VOLTAGEe
WIDEBAND NOISE DENSITYe
Electrical Specifications
(VS= ⴙ5 V, T
O
N
N
= ⴚ25ⴗC ≤ TA ≤ⴙ85ⴗC unless otherwise noted)
A
1000 hrs @ +25°C, V
= +15 V0.2ppm
S
0.1 Hz to 10 Hz12µV p-p
at 1 kHz640nV/√Hz
ParameterSymbolConditionsMinTypMaxUnits
TEMPERATURE COEFFICIENT
“E” GradeTCV
/°CI
O
= 0 mA38ppm/°C
OUT
“F” Grade515ppm/°C
“G” Grade1025ppm/°C
LINE REGULATION
“E/F” Grades∆V
O
/∆V
IN
4.5 V to 15 V, I
= 0 mA35125ppm/V
OUT
“G” Grade50150ppm/V
LOAD REGULATION
“E/F” Grades∆V
O
/∆I
LOAD
VS = 5.0 V, 0 mA to 5 mA20125ppm/mA
“G” Grade30150ppm/mA
Electrical Specifications
(VS= ⴙ5 V, T
= ⴚ40ⴗC ≤ TA ≤ⴙ125ⴗC unless otherwise noted)
A
ParameterSymbolConditionsMinTypMaxUnits
TEMPERATURE COEFFICIENT
“E” GradeTCV
/°CI
O
= 0 mA310ppm/°C
OUT
“F” Grade520ppm/°C
“G” Grade1030ppm/°C
LINE REGULATION
“E/F” Grades∆V
O
/∆V
IN
4.5 V to 15 V, I
= 0 mA40200ppm/V
OUT
“G” Grade70250ppm/V
LOAD REGULATION
“E/F” Grades∆V
O
/∆I
LOAD
VS = 5.0 V, 0 mA to 5 mA20200ppm/mA
“G” Grade30300ppm/mA
SUPPLY CURRENT@ +25°C1015µA
1218µA
THERMAL HYSTERESISTO-92, SO-8, TSSOP-850ppm
NOTE
Specifications subject to change without notice.
–4–
REV. A
ADR290/ADR291/ADR292
WAFER TEST LIMITS
(@ I
= 0 mA, TA = ⴙ25ⴗC unless otherwise noted)
LOAD
ParameterSymbolConditionsLimitsUnits
INITIAL ACCURACY
ADR290V
ADR291V
ADR292V
O
O
O
LINE REGULATION∆VO/∆V
LOAD REGULATION∆VO/∆I
IN
LOAD
VO + 1 V < VIN < 15 V, I
= 0 mA125ppm/V
OUT
0 to 5 mA, VIN = VO + 1 V125ppm/mA
2.042/2.054V
2.494/2.506V
4.090/4.102V
SUPPLY CURRENTADR290, ADR291, No Load12µA
ADR292, No Load15µA
NOTES
Electrical tests are performed as wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed
for standard product dice. Consult factory to negotiate specifications based on dice lot qualification through sample lot assembly and testing.
Specifications subject to change without notice.
DICE CHARACTERISTICS
Die Size 0.074 ⴛ 0.052 inch, 3848 sq. mils
(1.88 ⴛ 1.32 mm, 2.48 sq. mm)
Transistor Count: 52
1. V
IN
2. GND
3. V
4. V
OUT(FORCE)
OUT(SENSE)
For additional DICE ordering information, refer to databook.
REV. A–5–
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