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ADR510ARTZ-REEL7中文资料

1.0 V Precision Low Noise

Shunt Voltage Reference

ADR510 Rev. B

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. T rademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, M A 02062-9106, U.S.A. Tel: 781.329.4700 https://www.wendangku.net/doc/1b13911729.html, Fax: 781.461.3113 ?2003–2007 Analog Devices, Inc. All rights reserved.

FEATURES

Precision 1.000 V voltage reference Ultracompact 3 mm × 3 mm SOT-23 package No external capacitor required

Low output noise: 4 μV p-p (0.1 Hz to 10 Hz) Initial accuracy: ±0.35% maximum Temperature coefficient: 70 ppm/°C maximum Operating current range: 100 μA to 10 mA Output impedance: 0.3 Ω maximum Temperature range: ?40°C to +85°C APPLICATIONS

Precision data acquisition systems

Battery-powered equipment

Cellular phone

Notebook computer

PDA

GPS

3 V/5 V, 8-/12-bit data converters

Portable medical instruments

Industrial process control systems

Precision instruments

PIN CONFIGURATION NC = NO CONNECT

V+

V–

1 Figure 1. 3-Lead SOT-23-3

GENERAL DESCRIPTION

Designed for space critical applications, the ADR510 is a low voltage (1.000 V), precision shunt-mode voltage reference in an ultracompact (3 mm × 3 mm) SOT-23-3 package. The ADR510 features low temperature drift (70 ppm/°C), high accuracy (±0.35%), and ultralow noise (4 μV p-p) performance.

The ADR510 advanced design eliminates the need for an external capacitor, yet it is stable with any capacitive load. The minimum operating current increases from 100 μA to a maximum of 10 mA. This low operating current and ease of use make the ADR510 ideally suited for handheld battery-powered applications.

A TRIM terminal is available on the ADR510 to provide adjustment of the output voltage over ±0.5% without affecting the temperature coefficient of the device. This feature provides

users with the flexibility to trim out any system errors.

I L + I Q

V OUT= 1.0V

ADR510

I L + I Q

V S – V OUT

R BIAS=

Figure 2. Typical Operating Circuit

Table 1. ADR510

Part

Output

Voltage, V OUT Initial Accuracy

Temperature

Coefficient ADR510A 1.000 V 3.5 mV 0.35% 70 ppm/°C

ADR510

Rev. B | Page 2 of 12

TABLE OF CONTENTS

Features..............................................................................................1 Applications.......................................................................................1 Pin Configuration.............................................................................1 General Description.........................................................................1 Revision History...............................................................................2 Specifications.....................................................................................3 Electrical Characteristics.............................................................3 Absolute Maximum Ratings............................................................4 Thermal Resistance......................................................................4 ESD Caution..................................................................................4 Typical Performance Characteristics.............................................5 Parameter Definitions.......................................................................7 Temperature Coefficient...............................................................7 Thermal Hysteresis.......................................................................7 Applications Information.................................................................8 Adjustable Precision Voltage Source...........................................8 Output Voltage Trim.....................................................................8 Using the ADR510 with Precision Data Converters................8 Precise Negative Voltage Reference............................................9 Outline Dimensions.......................................................................10 Ordering Guide.. (10)

REVISION HISTORY

9/07—Rev. A to Rev. B

Changes to Adjustable Precision Voltage Source Section...........8 Changes to Figure 11........................................................................8 Changes to Figure 12 (8)

4/07—Rev. 0 to Rev. A

Changes to Table 1............................................................................1 Changes to Table 3 and Table 4.......................................................4 Changes to Figure 4, Figure 5, Figure 6, and Figure 7.................5 Changes to Thermal Hysteresis Section........................................7 Changes to Figure 11........................................................................8 Changes to Figure 14 and Equation 5............................................9 Changes to Ordering Guide. (10)

8/03—Revision 0: Initial Version

ADR510

Rev. B | Page 3 of 12

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

I IN = 100 μA to 10 mA @ T A = 25°C, unless otherwise noted. Table 2.

Parameter Symbol Conditions Min Typ

Max

Unit Output Voltage 1

V OUT 0.9965 1.0 1.0035 V Initial Accuracy V OUTERR ?3.5 +3.5 mV V OUTERR% ?0.35 +0.35 %

Temperature Coefficient, A Grade TCV OUT 0°C < T A < 70°C 70 ppm/°C ?40°C < T A < +85°C 85 ppm/°C Output Voltage Change vs. I IN ?V R I IN = 0.1 mA to 10 mA 3 mV Dynamic Output Impedance (?V R /?I R ) I IN = 1 mA ± 100 μA 0.3 Ω Minimum Operating Current I IN 0°C < T A < 70°C 100 μA Voltage Noise e N p-p f = 0.1 Hz to 10 Hz 4

μV p-p Turn-On Settling Time 2

t R To within 0.1% of output 10 μs Output Voltage Hysteresis V OUT_HYS 50

ppm

1 The forward diode voltage characteristic at ?1 mA is typically 0.65 V. 2

Measured without a load capacitor.

ADR510

Rev. B | Page 4 of 12

ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter Rating

Reverse Current 25 mA

Forward Current 20 mA

Storage Temperature Range ?65°C to +150°C

Operating Temperature Range ?40°C to +85°C

Junction Temperature Range ?65°C to +150°C

Lead Temperature (Soldering, 60 sec) 300°C Stresses above those listed under Absolute Maximum Ratings

may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Package power dissipation = (T JMAX ? T A )/θJA . Table 4. Thermal Resistance

Package Type θJA θJC Unit 3-Lead SOT-23-3 (RT-3) 230 146 °C/W ESD CAUTION

ADR510

Rev. B | Page 5 of 12

V O U T (V )

TEMPERATURE (°C)

TYPICAL PERFORMANCE CHARACTERISTICS

1.002

1.001

1.000

0.999

0.998

0.997

3270-006

TIME (400ns/DIV)

03270-003

Figure 3. Typical V OUT vs. Temperature

TIME (400ns/DIV)

03270-004

Figure 4. Turn-On Time TIME (400μs/DIV)

032

70-005

Figure 5. Turn-On Time with 1 μF Input Capacitor

Figure 6. Turn-Off Time

TIME (1ms/DIV)

03270-007

Figure 7. Turn-Off Time with 1 μF Input Capacitor

TIME (2μs/DIV)

ΔI IN = 100μA

V OUT = 50mV/DIV

03270-008

Figure 8. Output Response to 100 μA Input Current Change

ADR510

Rev. B | Page 6 of 12

TIME (2μs/DIV)

ΔI IN = 100μA

V OUT = 50mV/DIV

03270-009

Figure 9. Output Response to 100 μA Input Current Change

with 1 μF Capacitor

TIME (400ms/DIV)

03270-010

Figure 10. 1 Hz to 10 Hz Noise

ADR510

Rev. B | Page 7 of 12

PARAMETER DEFINITIONS

TEMPERATURE COEFFICIENT

This is the change of output voltage with respect to the operating temperature changes, normalized by the output voltage at 25°C. This parameter is expressed in parts per

million/degrees Celsius (ppm/°C) and can be determined with the following equation:

10)

()()()(C][ppm/×?×°?=

°T1T2C 25V T1V T2V TCV OUT OUT OUT OUT (1)

where:

V OUT (25°C ) is the output voltage at 25°C.

V OUT (T 1) is the output voltage at Temperature 1. V OUT (T 2) is the output voltage at Temperature 2.

THERMAL HYSTERESIS

Thermal hysteresis is the change of output voltage after the device is cycled through the temperature from 25°C to 0°C to 85°C and back to 25°C.

TC OUT OUT HYS OUT V C 25V V __)(?°= 6__10)

()([ppm]×°?°=

C 25V V C 25V V OUT TC

OUT OUT HYS OUT (2)

where:

V OUT (25°C ) is the output voltage at 25°C.

V OUT_TC is the output voltage at 25°C after temperature cycle at +25°C to ?40°C to +85°C and back to +25°C.

ADR510

Rev. B | Page 8 of 12

APPLICATIONS INFORMATION

The ADR510 is a 1.0 V precision shunt voltage reference designed to operate without an external output capacitor between the positive terminal and the negative terminal for stability. An external capacitor can be used for additional filtering of the supply.

As with all shunt voltage references, an external bias resistor (R BIAS ) is required between the supply voltage and the ADR510 (see Figure 2). R BIAS sets the current that is required to pass through the load (I L ) and the ADR510 (I Q ). The load and the supply voltage can vary, thus R BIAS is chosen based on the following conditions: ?

R BIAS must be small enough to supply the minimum I Q current to the ADR510 even when the supply voltage is at minimum value and the load current is at maximum value. ?

R BIAS also needs to be large enough so that I Q does not exceed 10 mA when the supply voltage is at its maximum value and the load current is at its minimum value.

Given these conditions, R BIAS is determined by the supply voltage (V S ), the load and operating current (I L and I Q ) of the ADR510, and the ADR510 output voltage.

L OUT S BIAS I I V V R +?=

(3)

ADJUSTABLE PRECISION VOLTAGE SOURCE

The ADR510, combined with a precision low input bias op amp such as the AD860x, can be used to output a precise adjustable voltage. Figure 11 illustrates implementation of this application using the ADR510.

Output of the op amp, V OUT , is determined by the gain of the circuit, which is completely dependent on the R2 and R1 resistors.

R2V OUT +

An additional capacitor in parallel with R2 can be added to filter out high frequency noise. The value of C2 is dependent on the value of R2.

V V OUT = (1 + R2/R1)

R ADR510

03270-011

Figure 11. Adjustable Precision Voltage Source

OUTPUT VOLTAGE TRIM

Using a mechanical or digital potentiometer, the output voltage of the ADR510 can be trimmed ±0.5%. The circuit in Figure 12 illustrates how the output voltage can be trimmed using a 10 kΩ potentiometer. Note that trimming using other resistor values may not produce an accurate output from the ADR510.

V V OUT

R ADR510

03270-012

Figure 12. Output Voltage Trim

USING THE ADR510 WITH PRECISION DATA CONVERTERS

The compact ADR510 and its low minimum operating current requirement make it ideal for use in battery-powered portable instruments, such as the AD7533 CMOS multiplying DAC, that use precision data converters.

Figure 13 shows the ADR510 serving as an external reference to the AD7533, a CMOS multiplying DAC. Such a DAC requires a negative voltage input in order to provide a positive output range. In this application, the ADR510 is supplying a ?1.0 V reference to the REF input of the AD7533.

OUT = 0V TO 1.0V 03270-013

Figure 13. ADR510 as a Reference for a 10-Bit CMOS DAC (AD7533)

ADR510

Rev. B | Page 9 of 12

PRECISE NEGATIVE VOLTAGE REFERENCE

The ADR510 is suitable for use in applications where a precise negative voltage reference is desired, including the application detailed in Figure 13.

Figure 14 shows the ADR510 configured to provide an output of ?1.0 V .

–1.0V

03270-014

Figure 14. Precise ?1.0 V Reference Configuration

Because the ADR510 characteristics resemble those of a Zener diode, the cathode shown in Figure 14 is 1.0 V higher with respect to the anode (V+ with respect to V? on the ADR510 package). Because the cathode of the ADR510 is tied to ground, the anode must be ?1.0 V .

R1 in Figure 14 should be chosen so that 100 μA to 10 mA is provided to properly bias the ADR510.

V R1DD )

(1???=

(5)

The R1 resistor should be chosen so that power dissipation is at a minimum. An ideal resistor value can be determined through manipulation of Equation 5.

ADR510

Rev. B | Page 10 of 12

OUTLINE DIMENSIONS

COMPLIANT TO JEDEC STANDARDS TO-236-AB

Figure 15. 3-Lead Small Outline Transistor Package [SOT-23-3]

(RT-3)

Dimensions shown in millimeters

ORDERING GUIDE

Model

Output Voltage (V OUT ) Initial Accuracy Temperature Coefficient Temperature Range

Package Description Package Option Ordering Quantity Branding ADR510ART-REEL7 1.0 V 3.5 mV 0.35% 70 ppm/°C ?40°C to +85°C 3-Lead SOT-23-3 RT-3 3,000 RAA ADR510ART-R2

1.0 V 3.5 mV 0.35% 70 ppm/°C ?40°C to +85°C 3-Lead SOT-23-3 RT-3 250 RAA ADR510ARTZ-REEL71 1.0 V 3.5 mV 0.35% 70 ppm/°C ?40°C to +85°C 3-Lead SOT-23-3 RT-3 3,000 RAA# ADR510ARTZ-R21

1.0 V

3.5 mV 0.35%

70 ppm/°C ?40°C to +85°C 3-Lead SOT-23-3 RT-3 250

RAA#

Z = RoHS Compliant Part. # denotes lead free, may be top or bottom marked.

ADR510 NOTES

Rev. B | Page 11 of 12

ADR510

Rev. B | Page 12 of 12

NOTES

D03270-0-9/07(B)