MC1403B 查看數據表（PDF） - ON Semiconductor

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MC1403B

Low Voltage Reference

ON Semiconductor 

MC1403, B

+ 5.0 V

1 MC1403 2 2.5 V 1.0 k

R1

3

Full Scale

Adjust 500 W

R2

IRef

Reference

Amplifier

Monolithic D/A

Converter

*0.1 mF

C1

1.2 k

R3

* Caution: System stability may be affected if output capacitance

* exceeds 1.0 mF. Using higher capacitance values is not

* recommended and should be carefully considered.

Figure 1. A Reference for Monolithic D/A Converters

Providing the Reference Current

for ON Semiconductor Monolithic D/A Converters

The MC1403 makes an ideal reference for many mono-

lithic D/A converters, requiring a stable current reference of

nominally 2.0 mA. This can be easily obtained from the

MC1403 with the addition of a series resistor, R1. A variable

resistor, R2, is recommended to provide means for full−

scale adjust on the D/A converter.

The resistor R3 improves temperature performance by

matching the impedance on both inputs of the D/A reference

amplifier. The capacitor decouples any noise present on the

reference line. It is essential if the D/A converter is located

any appreciable distance from the reference.

A single MC1403 reference can provide the required

current input for up to five of the monolithic D/A converters.

ELECTRICAL CHARACTERISTICS (Vin = 15 V, TA = 25°C, unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Output Voltage

(IO = 0 mA)

Temperature Coefficient of Output Voltage*

MC1403

Vout

2.475

2.5

DVO/DT

−

10

Output Voltage Change*

(Over specified temperature range)

MC1403B 0 to + 70°C

MC1403B −40 to + 85°C

DVO

−

−

−

−

Line Regulation (IO = 0 mA)

(15 V p VI p 40 V)

(4.5 V p VI p 15 V)

Load Regulation

(0 mA < IO < 10 mA)

Quiescent Current

(IO = 0 mA)

Regline

−

1.2

−

0.6

Regload

−

−

IQ

−

1.2

*Guaranteed but not tested.

Max

2.525

40

7.0

12.5

4.5

3.0

10

1.5

Unit

V

ppm/°C

mV

mV

mV

mA

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