2.5 V to 5.0 V Micropower, Precision

Series Mode Voltage References

Data Sheet

AD1582/AD1583/AD1584/AD1585

Rev. J

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FEATURES

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

Low quiescent current: 70 µA maximum

Current output capability: ±5 mA

Wideband noise (10 Hz to 10 kHz): 50 µV rms

Specified temperature range: −40°C to +125°C

Compact, surface-mount SOT-23 package

APPLICATIONS

Portable, battery-powered equipment; for example,

notebook computers, cellular phones, pagers, PDAs, GPSs,

and DMMs

Computer workstations; suitable for use with a wide range

of video RAMDACs

Smart industrial transmitters

PCMCIA cards

Automotive

Hard disk drives

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

PIN CONFIGURATION

GND

2

3

AD1582/

AD1583/

AD1584/

AD1585

TOP VIEW

(Not to Scale)

Figure 1. 3-Lead SOT-23-3 (RT Suffix)

900

800

700

600

2.7

5

AD1582 SERIES REFERENCE

200

100

0

500

400

300

Ω SOURCE RESISTOR.

Figure 2. Supply Current (μA) vs. Supply Voltage (V)

GENERAL DESCRIPTION

The AD1582/AD1583/AD1584/AD1585 are low cost, low power,

low dropout, precision band gap references. These designs are

available as 3-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 can 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 result from 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.

The AD1582/AD1583/AD1584/AD1585 series mode devices

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

with only 200 mV of required headroom supply. These parts

draw 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/AD1585 are available in two

grades, A and B, and are provided in a tiny footprint, the SOT-

23. All grades are specified over the industrial temperature

range of −40°C to +125°C.

Table 1. AD158x Products, Three Electrical Grades

Electrical

Grade

Initial Accuracy

Temperature

Coefficient

(ppm°C)

AD1582

AD1583/AD1585

AD1584

B

0.08%

0.10%

0.10%

50

A

0.80%

1.00%

0.98%

100