Analog Devices ADR380 1 a Datasheet

Precision Low-Drift 2.048 V/2.500 V

1

2

ADR380/

ADR381

(Not to Scale)

3

V

IN

GND

V

OUT

SOT-23 Voltage Reference

ADR380/ADR381

FEATURES
Initial Accuracy: ⴞ5 mV/ⴞ6 mV max
Initial Accuracy Error: ⴞ0.24%/ⴞ0.24%
Low TCV

: 25 ppm/ⴗC max

O

Load Regulation: 70 ppm/mA
Line Regulation: 25 ppm/V
Wide Operating Range:

2.4 V to 18 V for ADR380

2.8 V to 18 V for ADR381
Low Power: 120 ␮A max
High Output Current: 5 mA
Wide Temperature Range: –40ⴗC to +85ⴗC
Tiny 3-Lead SOT-23 Package with Standard Pinout

APPLICATIONS
Battery-Powered Instrumentation
Portable Medical Instruments
Data Acquisition Systems
Industrial Process Control Systems
Hard Disk Drives
Automotive

GENERAL DESCRIPTION

The ADR380 and ADR381 are precision 2.048 V and 2.500 V
band gap voltage references featuring high accuracy, high stabil­ity, and low-power consumption in a tiny footprint. Patented
temperature drift curvature correction techniques minimize
nonlinearity of the voltage change with temperature. The wide
operating range and low power consumption make them ideal
for 3 V to 5 V battery-powered applications.

The ADR380 and ADR381 are micropower, low dropout
voltage (LDV) devices that provide a stable output voltage from
supplies as low as 300 mV above the output voltage. They are
specified over the industrial (–40°C to +85°C) temperature
range. ADR380/ADR381 is available in the tiny 3-lead SOT-23
package.

PIN CONFIGURATION

3-Lead SOT-23

(RT Suffix)

Table I. ADR38x Products

Part Number Nominal Output Voltage (V)

ADR380 2.048
ADR381 2.500

REV. A

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ADR380/ADR381–SPECIFICATIONS

ADR380 ELECTRICAL CHARACTERISTICS

(@ VIN = 5.0 V, TA = 25ⴗC unless otherwise noted.)

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage V
Initial Accuracy Error V

O

OERR

2.043 2.048 2.053 V
–5 +5 mV
–0.24 +0.24 %

Temperature Coefficient TCV

O

–40°C < TA < +85°C525ppm/°C
0°C < TA< 70°C321ppm/°C

Minimum Supply Voltage Headroom V
Line Regulation ⌬V

IN

– V

/DV

O

O

IL ≤ 3 mA 300 mV
VIN = 2.5 V to 15 V 10 25 ppm/V

IN

–40°C < TA < +85°C

Load Regulation ⌬V

Quiescent Current I

Voltage Noise e
Turn-On Settling Time t
Long-Term Stability ⌬V
Output Voltage Hysteresis V

O

IN

N

R

O

O_HYS

/DI

LOADVIN

Ripple Rejection Ratio RRR f
Short Circuit to GND I

Specifications subject to change without notice.

SC

ADR380 ELECTRICAL CHARACTERISTICS

= 3 V, I

–40°C < T

= 0 mA to 5 mA 70 ppm/mA

LOAD

< +85°C

A

No Load 100 120 µA
–40°C < T

< +85°C 140 µA

A

0.1 Hz to 10 Hz 5 µV p-p
20 µs

1,000 Hrs 50 ppm

40 ppm

= 60 Hz 85 dB

IN

25 mA

(@ VIN = 15.0 V, TA = 25ⴗC unless otherwise noted.)

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage V
Initial Accuracy Error V

O

OERR

2.043 2.048 2.053 V
–5 +5 mV
–0.24 +0.24 %

Temperature Coefficient TCV

Minimum Supply Voltage Headroom V
Line Regulation ⌬V

Load Regulation ⌬V

Quiescent Current I

Voltage Noise e
Turn-On Settling Time t
Long-Term Stability ⌬V
Output Voltage Hysteresis V

– V

IN

O

O

IN

N

R

O

O_HYS

O

O

/DV

/DI

Ripple Rejection Ratio RRR f
Short Circuit to GND I

Specifications subject to change without notice.

SC

–40°C < TA < +85°C525ppm/°C
0°C < T

< 70°C321ppm/°C

A

IL ≤ 3 mA 300 mV
VIN = 2.5 V to 15 V

IN

–40°C < T

LOADVIN

–40°C < T

= 3 V, I

< +85°C1025 ppm/V

A

= 0 mA to 5 mA

LOAD

< +85°C70ppm/mA

A

No Load 100 120 µA
–40°C < T

< +85°C 140 µA

A

0.1 Hz to 10 Hz 5 µV p-p
20 µs

1,000 Hrs 50 ppm

40 ppm

= 60 Hz 85 dB

IN

25 mA

REV. A–2–

SPECIFICATIONS

ADR380/ADR381

(continued)

ADR381 ELECTRICAL CHARACTERISTICS

(@ VIN = 5.0 V, TA = 25ⴗC unless otherwise noted.)

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage V
Initial Accuracy Error V

O

OERR

2.494 2.5 2.506 V
–6 +6 mV
–0.24 +0.24 %

Temperature Coefficient TCV

O

–40°C < TA < +85°C525ppm/°C
0°C < TA < 70°C321ppm/°C

Minimum Supply Voltage Headroom V
Line Regulation ⌬V

IN

– V

/DV

O

O

IL ≤ 2 mA 300 mV
VIN = 2.8 V to 15 V 10 25 ppm/V

IN

–40°C < TA < +85°C

Load Regulation ⌬V

Quiescent Current I

Voltage Noise e
Turn-On Settling Time t
Long-Term Stability ⌬V
Output Voltage Hysteresis V

O

IN

N

R

O

O_HYS

/DI

LOADVIN

Ripple Rejection Ratio RRR f
Short Circuit to GND I

Specifications subject to change without notice.

SC

ADR381 ELECTRICAL CHARACTERISTICS

= 3.5 V, I

–40°C < T

A

= 0 mA to 5 mA 70 ppm/mA

LOAD

< +85°C
No Load 100 120 µA
–40°C < T

< +85°C 140 µA

A

0.1 Hz to 10 Hz 5 µV p-p

20 µs

1,000 Hrs 50 ppm

75 ppm

= 60 Hz 85 dB

IN

25 mA

(@ VIN = 15.0 V, TA = 25ⴗC unless otherwise noted.)

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage V
Initial Accuracy Error V

O

OERR

2.494 2.5 2.506 V
–6 +6 mV
–0.24 +0.24 %

Temperature Coefficient TCV

Minimum Supply Voltage Headroom V
Line Regulation ⌬V

Load Regulation ⌬V

Quiescent Current I

Voltage Noise e
Turn-On Settling Time t
Long-Term Stability ⌬V
Output Voltage Hysteresis V

– V

IN

O

O

IN

N

R

O

O_HYS

O

O

/DV

/DI

Ripple Rejection Ratio RRR f
Short Circuit to GND I

Specifications subject to change without notice.

SC

–40°C < TA < +85°C525ppm/°C
0°C < T

< 70°C321ppm/°C

A

IL ≤ 2 mA 300 mV
VIN = 2.8 V to 15 V 10 25 ppm/V

IN

–40°C < T

LOADVIN

–40°C < T

= 3.5 V, I

< +85°C

A

LOAD

< +85°C

A

= 0 mA to 5 mA 70 ppm/mA

No Load 100 120 µA
–40°C < T

< +85°C 140 µA

A

0.1 Hz to 10 Hz 5 µV p-p

20 µs

1,000 Hrs 50 ppm

75 ppm

= 60 Hz 85 dB

IN

25 mA

REV. A –3–

ADR380/ADR381

1

2

ADR380/

ADR381

(Not to Scale)

3

V

IN

GND

V

OUT

ABSOLUTE MAXIMUM RATINGS

1

PIN CONFIGURATION

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 V

Output Short-Circuit Duration to GND

> 15 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 sec

V

IN

≤ 15 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite

V

IN

3-Lead SOT-23

(RT Suffix)

Storage Temperature Range

RT Package . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C

Operating Temperature Range

ADR380/ADR381 . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Junction Temperature Range

RT Package . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering, 60 Sec) . . . . . . . . 300°C

Package Type ␪

2

JA

␪

JC

Unit

3-Lead SOT-23 (RT) 333 — °C/W

NOTES

1

Absolute maximum ratings apply at 25°C, unless otherwise noted.

2

θJA is specified for the worst-case conditions, i.e., θJA is specified for device

soldered in circuit board for surface-mount packages.

ORDERING GUIDE

Temperature Package Package Output Number of

Model Range Description Option Branding Voltage Parts per Reel

ADR380ART-R2 –40°C to +85°C SOT-23 RT-3 R2A 2.048 250
ADR380ART-REEL7 –40°C to +85°C SOT-23 RT-3 R2A 2.048 3,000
ADR380ARTZ-REEL7* –40°C to +85°C SOT-23 RT-3 R2A 2.048 3,000
ADR381ART-R2 –40°C to +85°C SOT-23 RT-3 R3A 2.500 250
ADR381ART-REEL7 –40°C to +85°C SOT-23 RT-3 R3A 2.500 3,000
ADR381ARTZ-REEL7* –40°C to +85°C SOT-23 RT-3 R3A 2.500 3,000

*Z = Pb-free part

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4,000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
ADR380/ADR381 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.

REV. A–4–