ADR1581 Analog Devices, Inc., ADR1581 Datasheet

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ADR1581

Manufacturer Part Number
ADR1581
Description
1.25 V Micropower, Precision Shunt Voltage Reference
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
Wide operating range: 60 μA to 10 mA
Initial accuracy: ±0.12% maximum
Temperature drift: ±50 ppm/°C maximum
Output impedance: 0.5 Ω maximum
Wideband noise (10 Hz to 10 kHz): 20 μV rms
Operating temperature range: −40°C to +85°C
High ESD rating
Compact, surface-mount SOT-23 package
APPLICATIONS
Portable, battery-powered equipment
Computer workstations
Smart industrial transmitters
PCMCIA cards
Automotive
3 V/5 V, 8-bit to 12-bit data converters
GENERAL DESCRIPTION
The ADR1581
gap reference. It provides an accurate 1.250 V output for input
currents between 60 μA and 10 mA.
The superior accuracy and stability of the ADR1581 is made
possible by the precise matching and thermal tracking of on-
chip components. Proprietary curvature correction design
techniques have been used to minimize the nonlinearities in
the voltage output temperature characteristics. The ADR1581
is stable with any value of capacitive load.
The low minimum operating current makes the ADR1581 ideal
for use in battery-powered 3 V or 5 V systems. However, the wide
operating current range means that the ADR1581 is extremely
versatile and suitable for use in a wide variety of high current
applications.
The ADR1581 is available in two grades, A and B, both of which
are provided in the SOT-23 package. Both grades are specified
over the industrial temperature range of −40°C to +85°C.
1
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.
Protected by U.S. Patent No. 5,969,657; other patents pending.
and DMMs
4 kV human body model
400 V machine model
Cellular phones, notebook computers, PDAs, GPSs,
Suitable for use with a wide range of video RAMDACs
1
is a low cost, 2-terminal (shunt), precision band
1.25 V Micropower, Precision Shunt
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
100
20
18
16
14
12
10
90
80
70
60
50
40
30
20
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8
6
4
2
0
0
–20
Figure 2. Reverse Voltage Temperature Drift Distribution
–5
Figure 3. Reverse Voltage Error Distribution
–4
V+
V–
PIN CONFIGURATION
–3
–10
1
2
NC = NO CONNECT
TEMPERATURE DRIFT (ppm/°C)
ADR1581
©2007 Analog Devices, Inc. All rights reserved.
TOP VIEW
–2
Voltage Reference
OUTPUT ERROR (mV)
Figure 1. SOT-23
–1
0
0
3
NC (OR V–)
1
2
10
ADR1581
3
www.analog.com
4
5
20

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ADR1581 Summary of contents

Page 1

... ADR1581 is extremely versatile and suitable for use in a wide variety of high current applications. The ADR1581 is available in two grades, A and B, both of which are provided in the SOT-23 package. Both grades are specified over the industrial temperature range of −40°C to +85°C. ...

Page 2

... Initial Version Temperature Performance............................................................6 Voltage Output Nonlinearity vs. Temperature ..........................7 Reverse Voltage Hysteresis...........................................................7 Output Impedance vs. Frequency ...............................................8 Noise Performance and Reduction .............................................8 Turn-On Time ...............................................................................8 Transient Response .......................................................................9 Precision Micropower Low Dropout Reference .......................9 Using the ADR1581 with 3 V Data Converters ..................... 10 Outline Dimensions ....................................................................... 11 Ordering Guide .......................................................................... 12 Rev Page ...

Page 3

... MAX 2.5 0.8 ) 0 −40 −55 Rev Page ADR1581B Max Min Typ Max 1.260 1.2485 1.250 1.2515 100 2.5 6 0.8 1 0.4 0 +85 −40 +85 +125 −55 +125 ADR1581 Unit V ppm/°C μ Ω μV rms μV p-p μs μV °C °C ...

Page 4

... Table 2. Parameter Reverse Current Forward Current 1 Internal Power Dissipation SOT-23 (RT) Storage Temperature Range Operating Temperature Range ADR1581/RT Lead Temperature, Soldering Vapor Phase (60 sec) Infrared (15 sec) 2 ESD Susceptibility Human Body Model Machine Model 1 Specification is for device (SOT-23 package) in free air at 25°C: θ ...

Page 5

... Rev Page 100 +125°C –40°C 20 +25° 0.2 0.4 0.6 0.8 1.0 REVERSE VOLTAGE (V) Figure 7. Reverse Current vs. Reverse Voltage 1 –40°C 0.8 +25°C 0.6 +85°C 0.4 0.2 0 0.01 0 FORWARD CURRENT (mA) Figure 8. Forward Voltage vs. Forward Current ADR1581 1.2 1.4 100 ...

Page 6

... The maximum slope of the two diagonals drawn from the initial output value at +25°C to the output values at +85°C and −40°C determines the performance grade of the device. For a given grade of the ADR1581, the designer can easily determine the maximum total error from the initial are at their minimum ...

Page 7

... This shows the same data in a different format. This characteristic (see Figure 13) is generated by normalizing the measured drift characteristic to the endpoint average drift. The residual drift error of approximately 500 ppm shows that the ADR1581 is compatible with systems that require 10-bit accurate temperature performance. –6 V ...

Page 8

... NOISE PERFORMANCE AND REDUCTION The noise generated by the ADR1581 is typically less than 5 μV p-p over the 0 band. 0 noise of a typical ADR1581. Noise kHz bandwidth is approximately 20 μV rms (see Figure 17a). If further noise reduction is desired, a one-pole low-pass filter can be added between the output pin and ground. A time constant of 0.2 ms has a − ...

Page 9

... The circuit in Figure 23 provides an ideal solution for creating a stable voltage reference with low standby power consumption, low input/output dropout capability, and minimum noise output. The amplifier both buffers and optionally scales up the ADR1581 (a) output voltage. Output voltages as high as 2.1 V can supply load current ...

Page 10

... The ADR1581 low output drift (50 ppm/°C) and compact subminiature SOT-23 package make it ideally suited for today’s high performance converters in space-critical applications. One family of ADCs for which the ADR1581 is well suited is the AD7714-3 and AD7715-3. The AD7714/AD7715 are charge- balancing (∑-Δ) ADCs with on-chip digital filtering intended for ...

Page 11

... Figure 26. 3-Lead Small Outline Transistor Package [SOT-23-3] (RT-3) Dimensions shown in millimeters 7” REEL 100.00 1.10 13” REEL 330.00 1.00 0.90 0.35 0.30 0.25 2.80 20.20 MIN 2.70 2.60 3.55 3.50 3.45 0.75 MIN Figure 27. Tape and Reel Dimensions (RT-3) Dimensions shown in millimeters Rev Page 0.20 0.08 OR 14.40 MIN 1.50 MIN 7” REEL 50.00 MIN 13.20 OR 13” REEL 100.00 MIN 13.00 12.80 9.90 8.40 6.90 ADR1581 ...

Page 12

... ADR1581ARTZ-R2 −40°C to +85°C 1 ADR1581BRTZ-REEL7 −40°C to +85°C 1 ADR1581BRTZ-R2 −40°C to +85° RoHS Compliant Part. ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Initial Output Temperature ...

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