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AD1582/AD1583/AD1584/AD1585

REV. D

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2.5 V to 5.0 V Micropower, Precision

Series Mode Voltage References

FUNCTIONAL BLOCK DIAGRAM

3-Lead SOT-23

(RT Suffix)

1

2

GND

3

AD1582/

AD1583/

AD1584/

AD1585

TOP VIEW

FEATURES

Series Reference (2.5 V, 3 V, 4.096 V, 5 V)

Low Quiescent Current: 70

A max

Current Output Capability:

5 mA

Wideband Noise (10 Hz to 10 kHz): 50

V rms

Specified Temperature Range: –40 C to +125 C

Compact, Surface-Mount SOT-23 Package

TARGET APPLICATIONS

1. Portable, battery-powered equipment, e.g., notebook comput-

ers, cellular phones, pagers, PDAs, GPSs, and DMMs.

2. Computer workstations. Suitable for use with a wide range of

video RAMDACs.

3. Smart industrial transmitters

4. PCMCIA cards

5. Automotive

6. Hard disk drives

7. 3 V/5 V, 8-bit/12-bit data converters

800

700

0

2.7

5

400

300

200

100

600

500

AD1582 SERIES REFERENCE

900

Figure 1. Supply Current (

µA) vs. Supply Voltage (V)

AD158x Products, Three Electrical Grades

Electrical

Tempco

Grade

Initial Accuracy

(ppm C)

AD1582

AD1583/AD1585 AD1584

B

0.08%

0.10%

0.10%

50

C

0.16%

0.20%

0.20%

50

A

0.80%

1.00%

0.98%

100

GENERAL DESCRIPTION

The AD1582, AD1583, AD1584, and AD1585 are a family of low

cost, low power, low dropout, precision band gap references.

These designs are available as three-terminal (series) devices

and are packaged in the compact SOT-23, 3-lead surface-mount

package. The versatility of these references makes them ideal for

use in battery-powered 3 V or 5 V systems where there may be

wide variations in supply voltage and a need to minimize power

dissipation.

The superior accuracy and temperature stability of the AD1582/

AD1583/AD1584/AD1585 is made possible by the precise

matching and thermal tracking of on-chip components. Patented

temperature drift curvature correction design techniques minimize

the nonlinearities in the voltage output temperature characteristic.

These series mode devices (AD1582/AD1583/AD1584/AD1585)

source or sink up to 5 mA of load current and operate efficiently

with only 200 mV of required headroom supply. This family

draws a maximum 70

µA of quiescent current with only a 1.0 µA/V

variation with supply voltage. The advantage of these designs

over conventional shunt devices is extraordinary. Valuable supply

current is no longer wasted through an input series resistor, and

maximum power efficiency is achieved at all input voltage levels.

The AD1582, AD1583, AD1584, and AD1585 are available in

three grades, A, B, and C, and are provided in a tiny footprint,

the SOT-23. All grades are specified over the industrial tem-

perature range of –40

°C to +125°C.