Zetex (Now Diodes) ZR25D, ZR25D01, ZR25D02 Schematic [ru]

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PRECISION 2.5 VOLT MICROPOWER

ZR25D

VOLTAGE REFERENCE

 

ISSUE 2 - FEBRUARY 1998

 

 

 

 

DEVICE DESCRIPTION

FEATURES

The ZR25D uses a bandgap circuit design to achieve a precision micropower voltage reference of 2.5 volts. The device is available in a small outline SOT23 surface mount package, ideal for applications where space saving is important.

The ZR25D design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR25D is recommended for operation between 50μA and 5mA and so is ideally suited to low power and battery powered applications.

Excellent performance is maintained to an absolute maximum of 25mA, however the rugged design and 20 volt processing allows the reference to withstand transient effects and currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds.

Small outline SOT23 package.

No stabilising capacitor required

Typical TC 30ppm/°C

Typical slope resistance 0.4Ω

± 3%, 2% and 1% tolerance

Industrial temperature range

Operating current 50μA to 5mA

Transient response, stable in less than 10μs

Alternative package options available

APPLICATIONS

Battery powered and portable equipment.

Metering and measurement systems.

Instrumentation.

Test equipment.

Data acquisition systems.

Precision power supplies.

SCHEMATIC DIAGRAM

VR

Gnd

4-161

ZR25D

ABSOLUTE MAXIMUM RATING

Reverse Current

25mA

Power Dissipation (Tamb=25°C)

SOT23

330mW

Forward Current

25mA

 

 

Operating Temperature

-40 to 85°C

 

 

Storage Temperature

-55 to 125°C

 

 

ELECTRICAL CHARACTERISTICS

TEST CONDITIONS (Unless otherwise stated) Tamb=25°C

SYMBOL

PARAMETER

CONDITIONS

 

LIMITS

 

TOL.

UNITS

 

 

 

 

 

 

 

 

 

%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIN

 

TYP

 

MAX

 

 

 

 

 

 

 

 

 

 

 

 

 

VR

 

Reverse Breakdown Voltage

IR=150μA

2.475

 

2.5

 

2.525

1

V

 

 

 

 

2.45

 

2.5

 

2.55

2

 

 

 

 

 

2.425

 

2.5

 

2.575

3

 

 

 

 

 

 

 

 

 

 

 

IMIN

Minimum Operating Current

 

 

 

25

 

50

 

μA

IR

 

Recommended Operating

 

0.05

 

 

 

5

 

mA

 

 

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TC

Average Reverse Breakdown

 

 

 

30

 

90

 

ppm/°C

 

 

Voltage Temp. Co.

IR(min) to

 

 

 

 

 

 

 

RS

§

Slope Resistance

IR(max)

 

 

0.4

 

2

 

Ω

 

 

 

 

 

ZR

 

Reverse Dynamic Impedance

IR = 1mA

 

 

0.3

 

0.8

 

Ω

 

 

 

f = 100Hz

 

 

 

 

 

 

 

 

 

 

IAC=0.1 IR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EN

 

Wideband Noise Voltage

IR = 150μA

 

 

45

 

 

 

μV(rms)

 

 

 

f = 100Hz to

 

 

 

 

 

 

 

 

 

 

10kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(V ( )V

( )) x 1000000

TC =

R max

R min

VR x (T(max)T(min))

 

 

Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range.

§ RS =

VR Change(IR (min) to IR (max))

IR (max) − IR (min)

 

 

60

 

 

 

 

 

 

 

 

)

50

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

μ

 

 

 

 

 

 

 

 

 

(

 

 

 

 

 

 

 

 

 

t

40

 

 

 

 

 

 

 

 

urren

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

e

 

 

 

 

 

 

°C

 

 

evers

 

 

 

 

 

 

 

 

20

 

 

 

A=85

 

 

 

 

 

T

 

°C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A=25

 

 

R

10

 

 

 

 

T

-40°C

 

 

 

 

 

 

 

=

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

T

 

 

 

0

 

 

 

 

 

 

 

 

 

0.2

0.6

1.0

1.4

 

1.8

2.2

2.6

Reverse Voltage (V)

Reverse Characteristics

4-162

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