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ADR291WFRZ-RL

P1-P3P4-P6P7-P8
Low Noise Micropower 2.5 V
Precision Voltage Reference
ADR291W
Rev. 0
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2010 Analog Devices, Inc. All rights reserved.
FEATURES
Qualified for automotive applications
Supply range
2.8 V to 15 V
Supply current: 15 μA maximum
Low noise: 8 μV (0.1 Hz to 10 Hz)
High output current: 5 mA
Temperature range: −40°C to +125°C
Pin compatible with REF02/REF19x
APPLICATIONS
Automotive Li-Ion Battery Measurement
Analog-to-digital and digital-to-analog converter reference
CONNECTION DIAGRAM
NC 1
V
IN
2
NC 3
GND
4
NC8
NC7
V
OUT
6
NC
5
NC = NO CONNECT
ADR291
TOP VIEW
(Not to Scale)
08554-001
Figure 1. 8-Lead SOIC_N (R-8)
GENERAL DESCRIPTION
The ADR291 is a low noise, micropower precision voltage refer-
ence that uses an XFET® reference circuit. The XFET architecture
offers significant performance improvements over traditional
band gap and buried Zener-based references. Improvements
include one quarter of the voltage noise output of band gap refer-
ences operating at the same current, very low and ultralinear
temperature drift, low thermal hysteresis, and excellent long-
term stability.
The ADR291 is a series voltage reference providing a stable and
accurate output voltage from supplies as low as 2.8 V. The
output voltage is 2.5 V.
Quiescent current is only 12 μA, making these devices ideal for
battery-powered instrumentation. Output accuracy is ±8.3 mV
maximum. Temperature coefficient is 15 ppm/°C maximum.
Line regulation and load regulation are typically 30 ppm/V and
30 ppm/mA, maintaining the overall high performance of the
reference. For a device with 5.0 V output, refer to the ADR293
data sheet.
The ADR291 is specified over the automotive temperature
range of −40°C to +125°C. The device is available in the 8-lead
SOIC package.
Table 1. ADR291 Product Details
Part No.
Output
Voltage (V) Accuracy (±%)
Temperature
Coefficient
(ppm/°C) Max
ADR291 2.500 0.332 15
ADR291W
Rev. 0 | Page 2 of 8
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Connection Diagram ....................................................................... 1
General Description ......................................................................... 1
Specifications ..................................................................................... 3
Electrical Specifications ............................................................... 3
Absolute Maximum Ratings ............................................................ 4
ESD Caution...................................................................................4
Pin Configuration and Function Descriptions ..............................5
Terminology .......................................................................................6
Outline Dimensions ..........................................................................7
Ordering Guide .............................................................................7
REVISION HISTORY
3/10—Revision 0: Initial Version
ADR291W
Rev. 0 | Page 3 of 8
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
V
S
= 3.0 V to 15 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
F GRADE
Output Voltage V
OUT
I
OUT
= 0 mA, −40°C ≤ T
A
≤ +125°C 2.4917 2.500 2.5083 V
Output Voltage Variation
1
–0.332 +0.332 %
LINE REGULATION
F Grade ∆V
OUT
/∆V
IN
I
OUT
= 0 mA 30 100 ppm/V
LOAD REGULATION
F Grade ∆V
OUT
/∆I
LOAD
V
S
= 5.0 V, I
OUT
= 0 mA to 5 mA 30 100 ppm/mA
LONG-TERM STABILITY ∆V
OUT
After 1000 hours of operation @ 125°C 50 ppm
NOISE VOLTAGE e
N
0.1 Hz to 10 Hz 8 μV p-p
WIDEBAND NOISE DENSITY e
N
At 1 kHz 480 nV/√Hz
1
Includes output voltage changes due to long-term drift and thermally induced output voltage hysteresis.
V
S
= 3.0 V to 15 V, T
A
= −25°C to +85°C, unless otherwise noted.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
TEMPERATURE COEFFICIENT
F Grade 5 15 ppm/°C
LINE REGULATION
F Grade ∆V
OUT
/∆V
IN
I
OUT
= 0 mA 35 125 ppm/V
LOAD REGULATION
F Grade ∆V
OUT
/∆I
LOAD
V
S
= 5.0 V, I
OUT
= 0 mA to 5 mA 20 125 ppm/mA
V
S
= 3.0 V to 15 V, T
A
= −40°C to +125°C, unless otherwise noted.
Table 4.
Parameter Symbol Conditions Min Typ Max Unit
TEMPERATURE COEFFICIENT
F Grade 5 20 ppm/°C
LINE REGULATION
F Grade ∆V
OUT
/∆V
IN
I
OUT
= 0 mA 40 200 ppm/V
LOAD REGULATION
F Grade ∆V
OUT
/∆I
LOAD
V
S
= 5.0 V, I
OUT
= 0 mA to 5 mA 20 200 ppm/mA
SUPPLY CURRENT I
S
T
A
= 25°C 9 12 μA
−40°C ≤ T
A
≤ +125°C 12 15 μA
OUTPUT VOLTAGE HYSTERESIS V
OUT-HYS
8-lead SOIC 50 ppm
P1-P3P4-P6P7-P8

ADR291WFRZ-RL

Mfr. #:
Buy ADR291WFRZ-RL
Manufacturer:
Analog Devices Inc.
Description:
Voltage References 2.5V Micropower Low Noise Prec
Lifecycle:
New from this manufacturer.
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