Improved, Lower Cost, Replacements for Standard
3-Terminal Device: Voltage In/Voltage Out
Laser Trimmed to High Accuracy: 2.500 V ؎ 10 mV
Excellent Temperature Stability: 25 ppm/؇C (AD1403A)
Low Quiescent Current: 1.5 mA max
10 mA Current Output Capability
Convenient Mini-DIP Package
Low Cost, Precision
2.5 V IC References
FUNCTIONAL BLOCK DIAGRAM
The AD1403 and AD1403A are improved three-terminal, low
cost, temperature compensated, bandgap voltage references that
provide a fixed 2.5 V output voltage for inputs between 4.5 V
and 40 V. A unique combination of advanced circuit design and
laser-wafer-trimmed thin-film resistors provides the AD1403/
AD1403A with an initial tolerance of ± 10 mV and a tempera-
ture stability of better than 25 ppm/°C. In addition, the low
quiescent current drain of 1.5 mA (max) offers a clear advan-
tage over classical Zener techniques.
The AD1403 or AD1403A is recommended as a stable refer-
ence for all 8-, 10- and 12-bit D-to-A converters that require an
external reference. In addition, the wide input range of the
AD1403/AD1403A allows operation with 5 volt logic supplies,
making these devices ideal for digital panel meter applications
and when only a single logic supply is available.
The AD1403 and AD1403A are specified for operation over the
0°C to +70°C temperature range. The AD580 series of 2.5 volt
precision IC references is recommended for applications where
operation over the –55°C to +125°C range is required.
1. The AD1403A offers improved initial tolerance over the in-
dustry-standard 1403A: ± 10 mV versus ± 25 mV at a lower
2. The three-terminal voltage in/voltage out operation of the
AD1403/AD1403A provides a regulated output voltage with-
out any external components.
3. The AD1403/AD1403A provides a stable 2.5 V output volt-
age for input voltages between 4.5 V and 40 V making these
devices ideal for systems that contain a single logic supply.
4. Thin film resistor technology and tightly controlled bipolar
processing provide the AD1403A with temperature stabilities
of 25 ppm/°C.
5. The low 1.5 mA maximum quiescent current drain of the
AD1403 and AD1403A makes them ideal for CMOS and
other low power applications.
*Protected by U.S. Patent Numbers: 3,887,863, RE30,586.
Information furnished by Analog Devices is believed to be accurate and
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use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
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