Datasheet AD1580 (Analog Devices)

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1.2 V Micropower, Precision Shunt Voltage Reference AD1580 FEATURES PIN CONFIGURATIONS Wide operating range: 50 µA to 10 mA AD1580 AD1580 V+ 1 V– 1 Initial accuracy: ±0.1% maximum Temperature drift: ±50 ppm/°C maximum 3 NC (OR V–) 3 NC (OR V–) Output impedance: 0.5 Ω maximum V– 2 V+ 2 Wideband noise (10 Hz to 10 kHz): 20 µV rms TOP VIEW TOP VIEW
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Operating temperature range: −40°C to +85°C NC = NO CONNECT
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NC = NO CONNECT
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High ESD rating
Figure 1. SOT-23 Figure 2. SC70
4 kV human body model 400 V machine model 50 Compact, surface-mount SOT-23 and SC70 packages 45 40 APPLICATIONS 35 Portable, battery-powered equipment 30 Cellular phones, notebook computers, PDAs, GPSs, TITY and DMMs N 25 A Computer workstations QU 20 Suitable for use with a wide range of video RAMDACs 15 Smart industrial transmitters 10 PCMCIA cards 5
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Automotive
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3 V/5 V, 8-bit to 12-bit data converters 0 –40 –30 –20 –10 0 10 20 30 40 TEMPERATURE DRIFT (ppm/°C) GENERAL DESCRIPTION
Figure 3. Reverse Voltage Temperature Drift Distribution The AD15801 is a low cost, 2-terminal (shunt), precision band
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gap reference. It provides an accurate 1.225 V output for input currents between 50 μA and 10 mA.
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The superior accuracy and stability of the AD1580 is made possible by the precise matching and thermal tracking of
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on-chip components. Proprietary curvature correction
TITY
design techniques have been used to minimize the nonli-
N 150 A
nearities in the voltage output temperature characteristics.
QU
The AD1580 is stable with any value of capacitive load.
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The low minimum operating current makes the AD1580
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ideal for use in battery-powered 3 V or 5 V systems. However, 004 the wide operating current range means that the AD1580 is
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00700- extremely versatile and suitable for use in a wide variety of
–10 –8 –6 –4 –2 0 2 4 6 8 10
high current applications.
OUTPUT ERROR (mV)
Figure 4. Reverse Voltage Error Distribution 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.
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Document Outline Features Applications General Description Pin Configurations Revision History Specifications Absolute Maximum Ratings ESD Caution Typical Performance Characteristics Theory of Operation Applying the AD1580 Temperature Performance Voltage Output Nonlinearity vs. Temperature Reverse Voltage Hysteresis Output Impedance vs. Frequency Noise Performance and Reduction Turn-On Time Transient Response Precision Micropower Low Dropout Reference Using the AD1580 with 3 V Data Converters Outline Dimensions Ordering Guide Package Branding Information