ANALOG DEVICES AD1580 Service Manual

1.2 V Micropower, Precision

NC = NO CONNECT

TOP VIEW

V+

1

V–

2

NC (OR V–)

3

AD1580

00700-001

NC = NO CONNECT

TOP VIEW

V–

1

V+

2

NC (OR V–)

3

AD1580

00700-002

50

0

QUANTITY

45

40

35

30

25

20

15

10

5

TEMPERATURE DRIFT (ppm/°C

)

–40 –30 –20 –10 0 10 20 30 40

00700-003

OUTPUT ERROR (mV)

300

0

QUANTITY

250

200

150

100

50

–10 –8 –6 –4 –2 0 2 4 6 8 10

00700-004

FEATURES

Wide operating range: 50 µA to 10 mA
Initial accuracy: ±0.1% maximum
Temperature drift: ±50 ppm/°C maximum
Output impedance: 0.5 Ω maximum
Wideband noise (10 Hz to 10 kHz): 20 µV rms
Operating temperature range: −40°C to +85°C
High ESD rating

4 kV human body model
400 V machine model

Compact, surface-mount SOT-23 and SC70 packages

APPLICATIONS

Portable, battery-powered equipment

Cellular phones, notebook computers, PDAs, GPSs,
and DMMs

Computer workstations

Suitable for use with a wide range of video RAMDACs
Smart industrial transmitters
PCMCIA cards
Automotive
3 V /5 V, 8 -bit to 12-bit data converters

GENERAL DESCRIPTION

1

The AD1580
gap reference. It provides an accurate 1.225 V output for input
currents between 50 μA and 10 mA.

The superior accuracy and stability of the AD1580 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 the SOT-23 and SC70 packages, the smallest
surface-mount packages available. Both grades are specified
over the industrial temperature range of −40°C to +85°C.

1

Protected by U.S. Patent No. 5,969,657.

Rev. F

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 parti es 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 prop erty of their respective owner s.

is a low cost, 2-terminal (shunt), precision band

Shunt Voltage Reference

AD1580

PIN CONFIGURATIONS

Figure 1. SOT-23 Figure 2. SC70

Figure 3. Reverse Voltage Temperature Drift Distribution

Figure 4. Reverse Voltage Error Distribution

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