Analog Devices AD1403A, AD1403 Datasheet

Low Cost, Precision

a

FEATURES
Improved, Lower Cost, Replacements for Standard

1403, 1403A
3-Terminal Device: Voltage In/Voltage Out
Laser Trimmed to High Accuracy: 2.500 V 6 10 mV

(AD1403A)
Excellent Temperature Stability: 25 ppm/8C (AD1403A)
Low Quiescent Current: 1.5 mA max
10 mA Current Output Capability
Low Cost
Convenient Mini-DIP Package

PRODUCT DESCRIPTION

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 tempera­ture stability of better than 25 ppm/°C. In addition, the low
quiescent current drain of 1.5 mA (max) offers a clear advan­tage over classical Zener techniques.

The AD1403 or AD1403A is recommended as a stable refer­ence 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.

2.5 V IC References

AD1403/AD1403A*

FUNCTIONAL BLOCK DIAGRAM

PRODUCT HIGHLIGHTS

1. The AD1403A offers improved initial tolerance over the in­dustry-standard 1403A: ±10 mV versus ±25 mV at a lower
cost.

2. The three-terminal voltage in/voltage out operation of the
AD1403/AD1403A provides a regulated output voltage with­out any external components.

3. The AD1403/AD1403A provides a stable 2.5 V output volt­age 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.

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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 parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

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AD1403/AD1403A–SPECIFICATIONS

(VIN = 15 V, TA = +258C unless otherwise noted.)

Characteristic Symbol Min Typ Max Unit

Output Voltage

(IO = 0 mA) V

O

AD1403 2.475 2.500 2.525 V
AD1403A 2.490 2.500 2.510

Temperature Coefficient of Output Voltage ∆V

/∆T ppm/°C

O

AD1403 10 40
AD1403A 10 25

Output Voltage Change, 0°C to +70°C ∆V

O

mV
AD1403 7.0
AD1403A 4.4

Line Regulation Reg

(15 V ≤ V

≤ 40 V) 1.2 4.5

IN

in

mV
(4.5 ≤ VIN ≤ 15 V) 0.6 3.0

Load Regulation Reg

load

10 mV

(0 mA < IO < 10 mA)

Quiescent Current I

I

1.2 1.5 mA

(IO = 0 mA)

Specifications subject to change without notice.

MAXIMUM RATINGS

(TA = +25°C unless otherwise noted)

Rating Symbol Value Unit

Input Voltage V
Storage Temperature T
Junction Temperature T

IN

STG

J

40 V
–25 to 100 °C
+175 °C

Operating Ambient
Temperature Range T

A

0 to +70 °C

Figure 1. AD1403/AD1403A Connection Diagram

ORDERING GUIDE

Initial Package

Model Tolerance Option*

AD1403 ±25 mV N-8
AD1403A ±10 mV N-8

*N Plastic DIP.

Figure 2. Simplified AD1403 Schematic

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