Analog Devices AD1580BRT-REEL7, AD1580BRT-REEL, AD1580BRT, AD1580ART-REEL7, AD1580ART-REEL Datasheet

a	1.2 V Micropower, Precision
	Shunt Voltage Reference

FEATURES

Wide Operating Range: 50 mA–10 mA Initial Accuracy: 60.1% max Temperature Drift: 650 ppm/8C max Output Impedance: 0.5 V max

Wideband Noise (10 Hz–10 kHz): 20 mV rms Operating Temperature Range: –408C to +858C

High ESD Rating

4 kV Human Body Model

400 V Machine Model

Compact, Surface-Mount, SOT-23 Package

GENERAL DESCRIPTION

The AD1580 is a low cost, two-terminal (shunt), precision bandgap reference. It provides an accurate 1.225 V output for input currents between 50 μA and 10 mA.

The AD1580’s superior accuracy and stability 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 AD1580 is stable with any value of capacitive load.

The low minimum operating current makes the AD1580 ideal for use in battery powered 3 V or 5 V systems. However, the wide operating current range means that the AD1580 is extremely versatile and suitable for use in a wide variety of high current applications.

The AD1580 is available in two grades, A and B, both of which are provided in an SOT-23 package, the smallest surface mount package available on the market. Both grades are specified over the industrial temperature range of –40°C to +85°C.

TARGET APPLICATIONS

1.Portable, Battery-Powered Equipment:

Cellular Phones, Notebook Computers, PDAs, GPS and DMM.

2.Computer Workstations

Suitable for use with a wide range of video RAMDACs.

3.Smart Industrial Transmitters

4.PCMCIA Cards.

5.Automotive.

6.3 V/5 V 8–12-Bit Data Converters.

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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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

AD1580

PIN CONFIGURATION

SOT-23 Package

V+ 1

3 NC (OR V–)

V– 2

TOP

VIEW

NC = NO CONNECT

	50
	45
	40
	35
QUANTITY	30
	25
	20
	15
	10
	5
	0
			–30		–20		–10			10		20		30		40
	–40								0
					TEMPERATURE DRIFT – ppm/°C

Reverse Voltage Temperature Drift Distribution

	300
	250
QUANTITY	200
	150
	100
	50
	0
			–8			–6		–4			–2		0		2		4							10
	–10																			6		8

OUTPUT ERROR – mV

Reverse Voltage Error Distribution

© Analog Devices, Inc., 1995

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: [phone] Fax: [phone]

AD1580–SPECIFICATIONS	(@ TA = +258C, IIN = 100 mA, unless otherwise noted)
Model			AD1580A			AD1580B
		Min	Typ	Max	Min	Typ	Max	Units
Reverse Voltage Output		1.215	1.225	1.235	1.224	1.225	1.226	V
Reverse Voltage Temperature Drift								ppm/°C
–40°C to +85°C				100			50
Minimum Operating Current, TMIN to TMAX				50			50	μA
Reverse Voltage Change with Reverse Current
50 μA < IIN < 10 mA, TMIN to TMAX			2.5	5		2.5	5	mV
50 μA < IIN < 1 mA, TMIN to TMAX			0.5			0.5		mV
Dynamic Output Impedance ( VR/ IR)
IIN = 1 mA ±100 μA (f = 120 Hz)			0.4	1		0.4	0.5	Ω
OUTPUT NOISE								μV rms
RMS Noise Voltage: 10 Hz to 10 kHz			20			20
Low Frequency Noise Voltage: 0.1 Hz to 10 Hz			5			5		μV p-p
Turn-On Settling Time to 0.1%1			5			5		μs
Output Voltage Hysteresis2			80			80		μV
Temperature Range								°C
Specified Performance, TMIN to TMAX		–40		+85	–40		+85
Operating Range3		–55		+125	–55		+125	°C

NOTES

1Measured with no load capacitor.

2Output hysteresis is defined as the change in the +25°C output voltage after a temperature excursion to +85°C and then to –40°C.

3The operating temperature range is defined as the temperature extremes at which the device will continue to function. Parts may deviate from their specified performance.

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS1
Reverse Current . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 25 mA
Forward Current . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 20 mA
Internal Power Dissipation2
SOT-23 (RT) . . . . . . . . . . . . . . . . . . . . . . .	. . . . . 0.3 Watts
Storage Temperature Range . . . . . . . . . . . .	–65°C to +150°C
Operating Temperature Range	–55°C to +125°C
AD1580/RT . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature, Soldering	+215°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . .
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . .	. . . . . . . +220°C
ESD Susceptibility3
Human Body Model . . . . . . . . . . . . . . . . .	. . . . . . . . . 4 kV
Machine Model . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 400 V

NOTES

1Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and 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.

2Specification is for device in free air at +25°C: SOT-23 Package: θJA = 300°C/Watt. 3The human body model is a 100 pF capacitor discharged through 1.5 kΩ. For the machine model, a 200 pF capacitor is discharged directly into the device.

ORDERING GUIDE

	Initial Output	Temperature	Package
Model	Error	Coefficient	Option
AD1580ART	10 mV	100 ppm/°C	RT
AD1580ART-REEL1	10 mV	100 ppm/°C	RT
AD1580ART-REEL72	10 mV	100 ppm/°C	RT
AD1580BRT	1 mV	50 ppm/°C	RT
AD1580BRT-REEL1	1 mV	50 ppm/°C	RT
AD1580BRT-REEL72	1 mV	50 ppm/°C	RT

NOTES

1Provided on a 13-inch reel containing 7,000 pieces. 2Provided on a 7-inch reel containing 2,000 pieces.

PACKAGE BRANDING INFORMATION

Four marking fields identify the device generic, grade, and date of processing. The first field is the product identifier. A “0” identifies the generic as the AD1580. The second field indicates the device grade; “A” or “B.” In the third field a numeral or letter indicates a calendar year; “5” for 1995, “A” for 2001. In the fourth field, letters A-Z represent a two week window within the calendar year; starting with “A” for the first two weeks of January.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD1580 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

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WARNING!

ESD SENSITIVE DEVICE

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Typical Performance Characteristics–AD1580

ppm–	1000
	500
CHANGE
	0
VOLTAGE
	–500
									~20ppm/°C
REVERSE	–1000
	–1500
	–2000
	–55		–35		–15		5		25		45		65		85		105		125
								TEMPERATURE – °C

Figure 1. Output Drift for Different Temperature

Characteristics
	4
mV	3
–
CHANGE	2			TA = 125°C
VOLTAGE	1
REVERSE				TA =
	0			–40°C – +85°C
	–1
	0.01	0.1	1	10

REVERSE CURRENT – mA

Figure 2. Output Voltage Error vs. Reverse Current

			600
		– nV/ÖHz	400
		VOLTAGE
		NOISE	200

1.0

10

100

1k

10k

100k

1M

FREQUENCY – Hz

Figure 3. Noise Spectral Density

	100
	80
– µA
CURRENT	60
REVERSE	40					+85°C
	20			+25°C
							–40°C
	0	0.2	0.4	0.6	0.8	1.0	1.2	1.4
	0

REVERSE VOLTAGE – V

Figure 4. Reverse Current vs. Reverse Voltage

	1.0
	0.8
– V
VOLTAGE	0.6
FORWARD	0.4
	0.2
	0
	0.01

–40°C +25°C

+85°C

0.1	1	10	100
	FORWARD CURRENT – mA

Figure 5. Forward Voltage vs. Forward Current

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