AD680AR Analog Devices Inc, AD680AR Datasheet

AD680AR

Manufacturer Part Number

AD680AR

Description

IC V-REF 2.5V LP 8-SOIC

Manufacturer

Analog Devices Inc

Datasheet

1.AD680JRZ.pdf (12 pages)

Specifications of AD680AR

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Rohs Status

RoHS non-compliant

Reference Type

Series

Voltage - Output

2.5V

Tolerance

±0.2%

Temperature Coefficient

20ppm/°C

Voltage - Input

4.5 ~ 36 V

Number Of Channels

Current - Quiescent

250µA

Current - Output

50mA

Operating Temperature

-40°C ~ 85°C

Peak Reflow Compatible (260 C)

Output Voltage

2.5V

Current Rating

250A

Output Voltage Max

2.5V

Leaded Process Compatible

Current - Cathode

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

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FEATURES

Low quiescent current at 250 μA max

Laser trimmed to high accuracy

Trimmed temperature coefficient

Low noise at 8 μV p-p from 0.1 Hz to 10 Hz

250 nV/√Hz wideband

Temperature output pin (N, R packages)

Available in three package styles

GENERAL DESCRIPTION

The AD680 is a band gap voltage reference that provides a fixed

2.5 V output from inputs between 4.5 V and 36 V. The

architecture of the AD680 enables the reference to be operated

at a very low quiescent current while still realizing excellent dc

characteristics and noise performance. Trimming of the high

stability thin-film resistors is performed for initial accuracy and

temperature coefficient, resulting in low errors over temperature.

The precision dc characteristics of the AD680 make it ideal for

use as a reference for DACs that require an external precision

reference. The device is also ideal for ADCs and, in general, can

offer better performance than the standard on-chip references.

Based upon its low quiescent current, which rivals that of many

incomplete 2-terminal references, the AD680 is recommended

for low power applications, such as hand-held, battery-operated

equipment.

A temperature output pin is provided on the 8-lead package

versions of the AD680. The temperature output pin provides an

output voltage that varies linearly with temperature and allows

the AD680 to be configured as a temperature transducer while

providing a stable 2.5 V output.

The AD680 is available in five grades. The AD680AN is speci-

fied for operation from −40°C to +85°C, while the AD680JN is

specified for 0°C to 70°C operation. Both the AD680AN and

AD680JN are available in 8-lead PDIP packages. The AD680AR

is specified for operation from −40°C to +85°C, while the

AD680JR is specified for 0°C to 70°C operation. Both are

available in 8-lead SOIC packages. The AD680JT is specified for

0°C to 70°C operation and is available in a 3-pin TO-92

package.

Rev. H

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.

2.5 V ± 5 mV max (AN, AR grades)

20 ppm/°C max (AN, AR grades)

8-lead PDIP, 8-lead SOIC, and 3-pin TO-92

PRODUCT HIGHLIGHTS

1. High Accuracy.

2. Low Errors.

3. Low Noise.

4. Temperature Transducer.

5. Low Cost.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The AD680 band gap reference operates on a very low

quiescent current which rivals that of many 2-terminal

references. This makes the complete, higher accuracy AD680

ideal for use in power-sensitive applications.

Laser trimming of both initial accuracy and temperature coef-

ficients results in low errors over temperature without the use

of external components. The AD680AN and AD680AR have

a maximum variation of 6.25 mV between −40°C and +85°C.

The AD680 noise is low, typically 8 μV p-p from 0.1 Hz to

10 Hz. Spectral density is also low, typically 250 nV/√Hz.

The temperature output pin on the 8-lead package versions

enables the AD680 to be configured as a temperature

transducer.

PDIP packaging provides machine insertability, while SOIC

packaging provides surface-mount capability. TO-92

packaging offers a cost-effective alternative to 2-terminal

references, offering a complete solution in the same package

in which 2-terminal references are usually found.

Figure 1. 8-Lead PDIP and 8-Lead SOIC Pin Configuration

CONNECTION DIAGRAMS

* TP DENOTES FACTORY TEST POINT.

NO CONNECTIONS SHOULD BE MADE

TO THESE PINS.

Figure 2. Connection Diagram TO-92

TEMP

GND

TP*

Low Power, Low Cost

NC = NO CONNECT

BOTTOM VIEW

(Not to Scale)

TOP VIEW

AD680

OUT

2.5 V Reference

GND

TP*

OUT

www.analog.com

AD680

Related parts for AD680AR

AD680AR Summary of contents

Page 1

... AD680JN is specified for 0°C to 70°C operation. Both the AD680AN and AD680JN are available in 8-lead PDIP packages. The AD680AR is specified for operation from −40°C to +85°C, while the AD680JR is specified for 0°C to 70°C operation. Both are available in 8-lead SOIC packages. The AD680JT is specified for 0° ...

Page 2

AD680 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Output Protection ........................................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Connection Diagram............................... 5 Theory of Operation ........................................................................ 6 Applying the AD680 .................................................................... 6 Noise Performance ....................................................................... 6 Turn-on Time................................................................................ 7 ...

Page 3

... Operating Performance 1 Maximum output voltage drift is guaranteed for all packages. 2 The operating temperature range is defined as the temperature extremes at which the device will still function. Parts may deviate from their specified performance outside their specified temperature range. AD680AN/AD680AR AD680JN/AD680JR Min Typ Max Min Typ 2 ...

Page 4

AD680 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter V to Ground IN Power Dissipation (25°C) Storage Temperature Lead Temperature (Soldering, 10 sec) Package Thermal Resistance θ (All Packages) JA ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as ...

Page 5

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Descriptions Test Point. A factory test point. No connections are made to these pins Input Voltage TEMP Temperature Output. ...

Page 6

AD680 THEORY OF OPERATION Band gap references are the high performance solution for low supply voltage operation. A typical precision band gap consists of a reference core and buffer amplifier. Based on a new, pat- ented band gap reference design ...

Page 7

Figure 7. Broadband Noise at 300 kHz TURN-ON TIME Upon application of power (cold start), the time required for the output voltage to reach its final value within a specified error band is defined ...

Page 8

... Figure 15 shows a typical output voltage drift for the AD680AN/ AD680AR and illustrates the test methodology. The box in Figure 15 is bounded on the left and right sides by the operat- 100μs ing temperature extremes, and on the top and bottom by the maximum and minimum output voltages measured over the operating temperature range ...

Page 9

TEMPERATURE OUTPUT PIN The 8-lead package versions of the AD680 provide a tempera- ture output pin on Pin 3 of each device. The output of Pin 3 (TEMP voltage that varies linearly with temperature 25°C is ...

Page 10

AD680 4.5 V REFERENCE FROM SUPPLY The AD680 can be used to provide a low power, 4.5 V reference, as shown in Figure 19. In addition to the AD680, the circuit uses a low power op amp ...

Page 11

OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2440) 4.00 (0.1574) 5.80 (0.2284) 3.80 (0.1497 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 0.25 (0.0098) 0.31 (0.0122) SEATING 0.10 0.17 (0.0067) ...

Page 12

... AD680 ORDERING GUIDE Initial Output Accuracy Voltage Model V (V) (mV) O AD680AR 2.5 5 AD680AR-REEL 2.5 5 AD680AR-REEL7 2 AD680ARZ 2.5 5 AD680ARZ-REEL7 1 2.5 5 AD680JR 2.5 10 AD680JR-REEL7 2 AD680JRZ 2 AD680JRZ-REEL7 2.5 10 AD680AN 2 AD680ANZ 2.5 5 AD680JN 2 AD680JNZ 2.5 10 AD680JT 2 AD680JTZ 2 Pb-free part. ©2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...

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