1.2 V Micropower, Precision
Shunt Voltage Reference
AD1580
Rev. F
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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
The AD1580
1
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 nonli-
nearities in the voltage output temperature characteristics.
The AD1580 is stable with any value of capacitive load.
is a low cost, 2-terminal (shunt), precision band
gap reference. It provides an accurate 1.225 V output for input
currents between 50 μA and 10 mA.
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.
PIN CONFIGURATIONS
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
Figure 1. SOT-23 Figure 2. SC70
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
Figure 3. Reverse Voltage Temperature Drift Distribution
OUTPUT ERROR (mV)
300
0
QUANTITY
250
200
150
100
50
–10 –8 –6 –4 –2 0 2 4 6 8 10
00700-004
Figure 4. Reverse Voltage Error Distribution
