ADR430 Analog Devices, Inc., ADR430 Datasheet

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ADR430

Manufacturer Part Number
ADR430
Description
Ultralow Noise Xfet Voltage References With Current Sink And Source Capability
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
Low noise (0.1 Hz to 10.0 Hz): 3.5 μV p-p @ 2.5 V output
No external capacitor required
Low temperature coefficient
Load regulation: 15 ppm/mA
Line regulation: 20 ppm/V
Wide operating range
High output source and sink current: +30 mA and −20 mA
Wide temperature range: −40°C to +125°C
APPLICATIONS
Precision data acquisition systems
High resolution data converters
Medical instruments
Industrial process control systems
Optical control circuits
Precision instruments
GENERAL DESCRIPTION
The ADR43x series is a family of XFET® voltage references
featuring low noise, high accuracy, and low temperature drift
performance. Using Analog Devices, Inc., patented temperature
drift curvature correction and XFET (eXtra implanted junction
FET) technology, voltage change vs. temperature nonlinearity in
the ADR43x is minimized.
The XFET references operate at lower current (800 μA) and
lower supply voltage headroom (2 V) than buried Zener
references. Buried Zener references require more than 5 V
headroom for operation. The ADR43x XFET references are
the only low noise solutions for 5 V systems.
The ADR43x family has the capability to source up to 30 mA of
output current and sink up to 20 mA. It also comes with a trim
terminal to adjust the output voltage over a 0.5% range without
compromising performance.
The ADR43x is available in 8-lead MSOP and 8-lead narrow
SOIC packages. All versions are specified over the extended
industrial temperature range of −40°C to +125°C.
Rev. D
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.
A Grade: 10 ppm/°C maximum
B Grade: 3 ppm/°C maximum
ADR430: 4.1 V to 18 V
ADR431: 4.5 V to 18 V
ADR433: 5.0 V to 18 V
ADR434: 6.1 V to 18 V
ADR435: 7.0 V to 18 V
ADR439: 6.5 V to 18 V
ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
Ultralow Noise XFET Voltage References
with Current Sink and Source Capability
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. Selection Guide
Model
ADR430A
ADR430B
ADR431A
ADR431B
ADR433A
ADR433B
ADR434A
ADR434B
ADR435A
ADR435B
ADR439A
ADR439B
Output
Voltage (V)
2.048
2.048
2.500
2.500
3.000
3.000
4.096
4.096
5.000
5.000
4.500
4.500
PIN CONFIGURATIONS
©2006–2007 Analog Devices, Inc. All rights reserved.
NOTES
1. NC = NO CONNECT
2. TP = TEST PIN (DO NOT CONNECT)
NOTES
1. NC = NO CONNECT
2. TP = TEST PIN (DO NOT CONNECT)
GND
GND
Figure 1. 8-Lead MSOP (RM-8)
Figure 2. 8-Lead SOIC_N (R-8)
V
NC
V
NC
TP
TP
IN
IN
1
2
3
4
1
2
3
4
(Not to Scale)
(Not to Scale)
ADR43x
ADR43x
TOP VIEW
TOP VIEW
Accuracy, ±
(mV)
3
1
3
1
4
1.5
5
1.5
6
2
5.5
2
8
7
6
5
8
7
6
5
TP
NC
V
TRIM
TP
NC
V
TRIM
OUT
OUT
www.analog.com
Temperature
Coefficient
(ppm/°C)
10
3
10
3
10
3
10
3
10
3
10
3

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ADR430 Summary of contents

Page 1

... Low temperature coefficient A Grade: 10 ppm/°C maximum B Grade: 3 ppm/°C maximum Load regulation: 15 ppm/mA Line regulation: 20 ppm/V Wide operating range ADR430: 4 ADR431: 4 ADR433: 5 ADR434: 6 ADR435: 7 ADR439: 6 High output source and sink current: +30 mA and −20 mA Wide temperature range: − ...

Page 2

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Pin Configurations ........................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 ADR430 Electrical Characteristics............................................. 3 ADR431 Electrical Characteristics............................................. 4 ADR433 Electrical Characteristics............................................. 5 ADR434 Electrical Characteristics............................................. 6 ADR435 Electrical Characteristics............................................. 7 ADR439 Electrical Characteristics............................................. 8 Absolute Maximum Ratings............................................................ 9 Thermal Resistance ...................................................................... 9 ESD Caution.................................................................................. 9 Typical Performance Characteristics ........................................... 10 Theory of Operation ...................................................................... 15 Basic Voltage Reference Connections ...

Page 3

... SPECIFICATIONS ADR430 ELECTRICAL CHARACTERISTICS 25°C, unless otherwise noted Table 2. Parameter Symbol OUTPUT VOLTAGE Grade B Grade INITIAL ACCURACY V OERR A Grade B Grade TEMPERATURE COEFFICIENT TCV O A Grade B Grade LINE REGULATION ∆V /∆V O LOAD REGULATION ∆V /∆I O ∆ ...

Page 4

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 ADR431 ELECTRICAL CHARACTERISTICS 25°C, unless otherwise noted Table 3. Parameter Symbol OUTPUT VOLTAGE Grade B Grade INITIAL ACCURACY V OERR A Grade B Grade TEMPERATURE COEFFICIENT TCV O A Grade B Grade LINE REGULATION ∆V /∆V O LOAD REGULATION ∆V /∆I O ∆ ...

Page 5

... SUPPLY VOLTAGE OPERATING RANGE V IN SUPPLY VOLTAGE V − HEADROOM 1 The long-term stability specification is noncumulative. The drift in subsequent 1000-hour periods is significantly lower than in the first 1000-hour period. ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 Conditions Min 2.996 2.9985 −40°C < T < +125°C A −40°C < T < +125° − ...

Page 6

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 ADR434 ELECTRICAL CHARACTERISTICS 25°C, unless otherwise noted Table 5. Parameter Symbol OUTPUT VOLTAGE Grade B Grade INITIAL ACCURACY V OERR A Grade B Grade TEMPERATURE COEFFICIENT TCV O A Grade B Grade LINE REGULATION ∆V /∆V O LOAD REGULATION ∆V /∆I O ∆ ...

Page 7

... SHORT CIRCUIT TO GND I SC SUPPLY VOLTAGE OPERATING RANGE V SUPPLY VOLTAGE HEADROOM V 1 The long-term stability specification is noncumulative. The drift in subsequent 1000-hour periods is significantly lower than in the first 1000-hour period. ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 Conditions O OERR O −40°C < T < +125°C A −40°C < T < +125°C A /∆ ...

Page 8

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 ADR439 ELECTRICAL CHARACTERISTICS 25°C, unless otherwise noted Table 7. Parameter Symbol OUTPUT VOLTAGE Grade B Grade INITIAL ACCURACY V OERR A Grade B Grade TEMPERATURE COEFFICIENT TCV A Grade B Grade LINE REGULATION ∆V LOAD REGULATION ∆V ∆V QUIESCENT CURRENT ...

Page 9

... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 THERMAL RESISTANCE θ is specified for the worst-case conditions, that is, a device JA soldered in a circuit board for surface-mount packages ...

Page 10

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 TYPICAL PERFORMANCE CHARACTERISTICS Default conditions: ± pF 2.5009 2.5007 2.5005 2.5003 2.5001 2.4999 2.4997 2.4995 –40 –25 – TEMPERATURE (°C) Figure 3. ADR431 Output Voltage vs. Temperature 4.0980 4.0975 4.0970 4.0965 4.0960 4.0955 4.0950 –40 –25 –10 ...

Page 11

... TEMPERATURE (°C) Figure 10. ADR431 Load Regulation vs. Temperature 0mA to 10mA –40 –25 – TEMPERATURE (°C) Figure 11. ADR435 Load Regulation vs. Temperature ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 2.5 2.0 –40°C 1.5 1.0 +125°C 0.5 0 –10 95 110 125 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 95 110 125 –40 –25 Figure 13 ...

Page 12

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 1.9 1.7 1.5 1.3 1.1 0.9 –40 –25 – TEMPERATURE (°C) Figure 15. ADR435 Minimum Headroom vs. Temperature –4 –40 –25 – TEMPERATURE (°C) Figure 16. ADR435 Line Regulation vs. Temperature C = 0.01µ LOAD V = 1V/DIV 2V/DIV IN Figure 17. ADR431 Turn-On Response NO LOAD 80 95 ...

Page 13

... Figure 21. ADR431 Line Transient Response, 0.1 μF Bypass Capacitor 1µV/DIV TIME = 1s/DIV Figure 22. ADR431 0 10.0 Hz Voltage Noise 50µV/DIV TIME = 1s/DIV Figure 23. ADR431 kHz Voltage Noise ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 2µV/DIV Figure 24. ADR435 0 10.0 Hz Voltage Noise 50µV/DIV Figure 25. ADR435 kHz Voltage Noise 14 12 ...

Page 14

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 100 1k FREQUENCY (Hz) Figure 27. Output Impedance vs. Frequency ADR435 ADR430 10k 100k Rev Page –10 –30 –50 –70 –90 –110 –130 –150 10 100 1k 10k FREQUENCY (Hz) Figure 28. Ripple Rejection Ratio 100k 1M ...

Page 15

... NOISE PERFORMANCE The noise generated by the ADR43x family of references is typically less than 3.75 μV p-p over the 0 10.0 Hz band for ADR430, ADR431, and ADR433. Figure 22 shows the 0 10.0 Hz noise of the ADR431, which is only 3.5 μV p-p. The noise measurement is made with a band-pass filter made of a 2-pole high-pass filter with a corner frequency at 0.1 Hz ...

Page 16

... NEGATIVE PRECISION REFERENCE WITHOUT R P 10kΩ PRECISION RESISTORS 10kΩ (ADR430) 15kΩ (ADR431) In many current-output CMOS DAC applications, where the output signal voltage must be of the same polarity as the refer- ence voltage required to reconfigure a current-switching DAC into a voltage-switching DAC through the use of a 1.25 V reference, an operational amplifier, and a pair of resistors ...

Page 17

... L Figure 35 overcomes the problem by including the wiring resistance within the forcing loop of the operational amplifier. ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 Because the amplifier senses the load voltage, the operational amplifier loop control forces the output to compensate for the wiring error and to produce the correct voltage at the load. ...

Page 18

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 PROGRAMMABLE CURRENT SOURCE Together with a digital potentiometer and a Howland current pump, ADR435 forms the reference source for a programmable current as + ⎛ ⎞ ⎜ ⎟ ⎜ ⎟ × ⎜ ⎟ ⎜ ⎟ B ⎝ ⎠ and D = × ...

Page 19

... ANALOG 10µF SUPPLY 0.1µF Figure 40. Voltage Reference for the AD7701 16-Bit ADC ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 PRECISION BOOSTED OUTPUT REGULATOR A precision voltage output with boosted current capability can be realized with the circuit shown in Figure 41. In this circuit, U2 forces V N1. Therefore, the load current is furnished by V ...

Page 20

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 3.20 3.00 2.80 5. 3.20 4.90 3.00 4.65 2. PIN 1 0.65 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.38 0.23 0.00 0.22 0.08 COPLANARITY SEATING 0.10 PLANE COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 42. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 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) 8° 0° ...

Page 21

... ADR430AR 2.048 3 ADR430AR-REEL7 2.048 3 1 2.048 3 ADR430ARZ 1 2.048 3 ADR430ARZ-REEL7 ADR430ARM 2.048 3 ADR430ARM-REEL7 2.048 3 1 2.048 3 ADR430ARMZ 1 2.048 3 ADR430ARMZ-REEL7 ADR430BR 2.048 1 ADR430BR-REEL7 2.048 1 1 2.048 1 ADR430BRZ 1 2.048 1 ADR430BRZ-REEL7 ADR431AR 2.500 3 ADR431AR-REEL7 2.500 3 1 2.500 3 ADR431ARZ 1 2.500 3 ADR431ARZ-REEL7 ADR431ARM 2.500 3 ADR431ARM-REEL7 2.500 ...

Page 22

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 Accuracy, ± Output Model Voltage (V) (mV) ADR435AR 5.000 6 ADR435AR-REEL7 5.000 6 1 ADR435ARZ 5.000 6 1 5.000 6 ADR435ARZ-REEL7 ADR435ARM 5.000 6 ADR435ARM-REEL7 5.000 6 1 5.000 6 ADR435ARMZ 1 5.000 6 ADR435ARMZ-REEL7 ADR435BR 5.000 2 ADR435BR-REEL7 5.000 2 1 5.000 2 ADR435BRZ 1 5.000 2 ADR435BRZ-REEL7 ADR439AR 4.500 5.5 ADR439AR-REEL7 4.500 5.5 1 4.500 5.5 ADR439ARZ 1 4 ...

Page 23

... NOTES ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 Rev Page ...

Page 24

... ADR430/ADR431/ADR433/ADR434/ADR435/ADR439 NOTES ©2006–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04500-0-12/07(D) Rev Page ...

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