ADR291ER Analog Devices Inc, ADR291ER Datasheet

IC VREF PREC 2.5V 5MA OUT 8-SOIC

ADR291ER

Manufacturer Part Number
ADR291ER
Description
IC VREF PREC 2.5V 5MA OUT 8-SOIC
Manufacturer
Analog Devices Inc
Series
XFET®r
Datasheet

Specifications of ADR291ER

Rohs Status
RoHS non-compliant
Reference Type
Series
Voltage - Output
2.5V
Tolerance
±0.08%
Temperature Coefficient
10ppm/°C
Voltage - Input
2.8 ~ 15 V
Number Of Channels
1
Current - Quiescent
15µA
Current - Output
5mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Current - Cathode
-

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FEATURES
Supply range
Supply current: 15 μA maximum
Low noise: 8 μV and 12 μV p-p (0.1 Hz to 10 Hz)
High output current: 5 mA
Temperature range: −40°C to +125°C
Pin-compatible with
APPLICATIONS
Portable instrumentation
Precision reference for 3 V and 5 V systems
Analog-to-digital and digital-to-analog converter reference
Solar-powered applications
Loop-current-powered instruments
GENERAL DESCRIPTION
The ADR291 and ADR292 are low noise, micropower precision
voltage references that use an XFET® reference circuit. The new
XFET architecture offers significant performance improvements
over traditional band gap and buried Zener-based references.
Improvements include one quarter the voltage noise output of
band gap references operating at the same current, very low and
ultralinear temperature drift, low thermal hysteresis, and
excellent long-term stability.
The ADR291/ADR292 family is a series of voltage references
providing stable and accurate output voltages from supplies as
low as 2.8 V for the ADR291. Output voltage options are 2.5 V
and 4.096 V for the ADR291 and ADR292, respectively.
Quiescent current is only 12 μA, making these devices ideal for
battery-powered instrumentation. Three electrical grades are
available offering initial output accuracies of ±2 mV, ±3 mV,
and ±6 mV maximum for the ADR291, and ±3 mV, ±4 mV,
and ±6 mV maximum for the ADR292. Temperature
Rev. E
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.
2.8 V to 15 V, ADR291
4.4 V to 15 V, ADR292
REF02/REF19x
4.096 V Precision Voltage References
Low Noise Micropower 2.5 V and
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
coefficients for the three grades are 8 ppm/°C, 15 ppm/°C, and
25 ppm/°C maximum, 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 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
3-lead TO-92 packages.
Table 1. ADR291/ADR292 Product
Part No.
ADR291
ADR292
Output
Voltage (V)
2.500
4.096
CONNECTION DIAGRAMS
GND
GND
NC
V
NC
V
NC
NC
IN
Figure 2. 8-Lead TSSOP (RU-8)
IN
Figure 3. 3-Lead TO-92 (T-3)
Figure 1. 8-Lead SOIC (R-8)
V
OUT
1
2
3
4
1
2
3
4
NC = NO CONNECT
NC = NO CONNECT
©2007 Analog Devices, Inc. All rights reserved.
(Not to Scale)
(Not to Scale)
(Not to Scale)
ADR291/
ADR291/
ADR292
TOP VIEW
ADR292
TOP VIEW
3
TOP VIEW
ADR291
Initial
Accuracy (±%)
0.08, 0.12, 0.24
0.07, 0.10, 0.15
ADR291/ADR292
GND
2
1
8
7
6
5
V
7
6
5
8
IN
NC
NC
V
NC
NC
NC
V
NC
OUT
OUT
Temperature
Coefficient
(ppm/°C) Max
8, 15, 25
8, 15, 25
www.analog.com

Related parts for ADR291ER

ADR291ER Summary of contents

Page 1

FEATURES Supply range 2 ADR291 4 ADR292 Supply current: 15 μA maximum Low noise: 8 μV and 12 μV p-p (0 Hz) High output current Temperature range: ...

Page 2

ADR291/ADR292 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Connection Diagrams...................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 ADR291 Electrical Specifications............................................... 3 ADR292 Electrical Specifications............................................... 4 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configurations and ...

Page 3

SPECIFICATIONS ADR291 ELECTRICAL SPECIFICATIONS 25°C, unless otherwise noted Table 2. Parameter Symbol E GRADE Output Voltage V OUT Initial Accuracy V OERR F GRADE Output Voltage V OUT Initial ...

Page 4

ADR291/ADR292 −40°C to+125°C, unless otherwise noted Table 4. Parameter TEMPERATURE COEFFICIENT E Grade F Grade G Grade LINE REGULATION E/F Grades G Grade LOAD REGULATION E/F Grades G Grade ...

Page 5

−25°C to +85°C, unless otherwise noted Table 6. Parameter TEMPERATURE COEFFICIENT E Grade F Grade G Grade LINE REGULATION E/F Grades G Grade LOAD REGULATION E/F Grades G Grade ...

Page 6

ADR291/ADR292 ABSOLUTE MAXIMUM RATINGS Remove power before inserting or removing units from their sockets. Table 8. Parameter Supply Voltage Output Short-Circuit Duration to GND Storage Temperature Range Packages Operating Temperature Range ADR291/ADR292 Junction Temperature Range T, R, ...

Page 7

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS ADR291 ADR292 TOP VIEW 6 OUT (Not to Scale) GND CONNECT Figure 4. 8-Lead SOIC (R-8) Table ...

Page 8

ADR291/ADR292 TYPICAL PERFORMANCE CHARACTERISTICS 2.506 2.504 2.502 2.500 2.498 2.496 2.494 –50 – TEMPERATURE (°C) Figure 7. ADR291 V vs. Temperature OUT 4.102 4.100 4.098 4.096 4.094 4.092 4.090 ...

Page 9

ADR291 3.0V TO 15V S ADR292 4.5V TO 15V ADR291 –50 – TEMPERATURE (°C) Figure 13. ADR291/ADR292 Line Regulation vs. Temperature 0.7 0 ...

Page 10

ADR291/ADR292 0 –500 –1000 T = –40°C A –1550 –2000 –2500 –3000 –3500 –4000 0.1 1 SOURCING LOAD CURRENT (mA) Figure 19. ADR292 ΔV from Nominal vs. Load Current OUT 1000 ADR292 900 800 700 ADR291 600 500 400 300 ...

Page 11

I = 5mA L OFF 100 Figure 25. ADR291 Load Transient I = 5mA 1nF L 100 OFF Figure 26. ADR291 Load Transient I = 5mA ...

Page 12

ADR291/ADR292 TERMINOLOGY Line Regulation Line regulation refers to the change in output voltage due to a specified change in input voltage. It includes the effects of self- heating. Line regulation is expressed as percent-per-volt, parts- per-million-per-volt, or microvolts-per-volt change in ...

Page 13

THEORY OF OPERATION The ADR291/ADR292 series of references uses a reference generation technique known as XFET (eXtra implanted junc- tion FET). This technique yields a reference with low noise, low supply current, and very low thermal hysteresis. The core of ...

Page 14

ADR291/ADR292 APPLICATIONS INFORMATION NEGATIVE PRECISION REFERENCE WITHOUT PRECISION RESISTORS In many current-output CMOS DAC applications, where the output signal voltage must be of the same polarity as the reference voltage often necessary to reconfigure a current-switching DAC into ...

Page 15

KELVIN CONNECTIONS In many portable instrumentation applications, the PC board area is directly related to cost; therefore, circuit interconnects are reduced to a minimal width. These narrow lines can cause large voltage drops if the voltage reference is required to ...

Page 16

ADR291/ADR292 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 0.25 (0.0098) 0.10 (0.0040) 0.51 (0.0201) COPLANARITY 0.10 0.31 (0.0122) 0.25 (0.0098) SEATING PLANE ...

Page 17

... ORDERING GUIDE Output Model Voltage ADR291ER 2.50 ADR291ER-REEL7 2.50 ADR291ERZ 1 2.50 1 ADR291ERZ-REEL7 2.50 ADR291FR 2.50 ADR291FR-REEL 2.50 ADR291FR-REEL7 2.50 1 ADR291FRZ 2.50 1 ADR291FRZ-REEL 2.50 1 ADR291FRZ-REEL7 2.50 ADR291GR 2.50 ADR291GR-REEL 2.50 ADR291GR-REEL7 2.50 1 ADR291GRZ 2.50 1 ADR291GRZ-REEL 2.50 1 ADR291GRZ-REEL7 2.50 ADR291GRU 2.50 ADR291GRU-REEL7 2.50 ...

Page 18

ADR291/ADR292 NOTES Rev Page ...

Page 19

NOTES Rev Page ADR291/ADR292 ...

Page 20

ADR291/ADR292 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00163-0-12/07(E) Rev Page ...

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