Diodes LM4040 User Manual

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LM4040

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

Description

The LM4040 is a family of bandgap circuits designed to
achieve precision micro-power voltage references of 2.5V,

3.0V and 5.0V. The devices are availabl e in 0.2% B-grade,

0.5% C-grade and 1% D-grade initial tolerances.
They are available in small outline SOT23 and SC70-5

surface mount packages which are ideal for applications
where space is at a premium.

Excellent performance is maintained over the 60µA to
15mA operating current range with a typical temperature
coefficient of only 20ppm/°C. The device has been
designed to be highly tolerant of capacitive loads so
maintaining excellent stability.

This device offers a pin for pin compatible alternative to the
LM4040 voltage reference.

Pin Assignments

LM4040 F (SOT23)

Cathode

Anode

Pin 1 must be left floating or connected to pin 2

Anode

3

2

LM4040 H5 (SC70-5)

1

*

2

Top view

1

*

4

N/C

Features

• Small packages: SOT23 & SC70-5

• No output capacitor required

• Output voltage tolerance

o LM4040B ±0.2% at 25°C
o LM4040C ±0.5% at 25°C
o LM4040D ±1% at 25°C

• Low output noise

• (10Hz to 10kHz) .............. 45µV

• Wide operating current range 60µA to 15mA

• Extended temperature range -40°C to +125°C

• Low temperature coefficient 100 ppm/°C (max)

• All parts AEC-Q100 Grade1 qualified

RMS

Applications

• Battery powered equipment

• Precision power supplies

• Portable instrumentation

• Portable communications devices

• Notebook and palmtop computers

• Data acquisition systems

Cathode

* Pin 2 must be left floating or connected to pin 1

3

To p View

LM4040

Document number: DS33195 Rev. 5 - 2

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LM4040

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)

Parameter Rating Unit

Continuous Reverse Current 20 mA
Continuous Forward Current 10 mA
Operating Junction Temperature -40 to +150 °C
Storage Temperature -55 to +150 °C

Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum rating,
for extended periods, may reduce device reliability.

Unless otherwise stated voltages specified are relative to the ANODE pin.

Package Thermal Data

P

Package θJA

SOT23 380°C/W 330mW

SC70-5 380°C/W 330mW

T

AMB

Recommended Operating Conditions

Min. Max. Units

Reverse Current 0.06 15 mA
Operating Ambient Temperature Range -40 125 °C

LM4040

Document number: DS33195 Rev. 5 - 2

DIS

= 25°C, TJ = 150°C

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PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

Electrical Characteristics (Test conditions: T

LM4040-2.5

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= 25°C, unless otherwise specified.)

AMB

LM4040

Symbol Parameter

Reverse breakdown
voltage

V

REF

Reverse breakdown
voltage tolerance

I

= 100µA

R

= 100µA

I

R

Conditions

T

-40 to +85°C ±21 ±29 ±49

-40 to +125°C ±30 ±38 ±63

Typ.

AMB

25°C 2.5 V
25°C

LM4040

B Limits

LM4040

C Limits

LM4040

D Limits

±5 ±12 ±25

Units

mV

25°C 45 60 60 65

I

RMIN

ΔVR/ΔT

ΔVR/ΔIR

ZR

en

VR

V

HYST

LM4040

Document number: DS33195 Rev. 5 - 2

Minimum operating
current

Average reverse
breakdown voltage
temperature coefficient

I

= 10mA

R

IR = 1mA
IR = 100µA

RMIN IR

I
< 1mA

Reverse breakdown
change with current

1mA < IR

< 15mA

= 1mA, f = 120Hz

Dynamic output
impedance

Noise voltage
Long term stability (non

cumulative)
Themal hysteresis ΔT = -40°C to =125°C 0.08 %

I

R

IAC = 0.1IR

= 100µA

I

R

10Hz < f < 10kHz
t = 1000Hrs, I

-40 to +85°C

-40 to +125°C 68 68 73

65 65 70

±20

-40 to +125°C

±15 ±100 ±100 ±150 ppm/°C
±15

25°C 0.3 0.8 0.8 1.0

-40 to +85°C

-40 to +125°C 1.0 1.0 1.2

1.0 1.0 1.2

25°C 2.5 6.0 6.0 8.0

-40 to +85°C

-40 to +125°C 8.0 8.0 10.0

8.0 8.0 10.0

0.3 0.8 0.9 1.1 Ω

35

= 100µA

R

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120 ppm

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µA

mV

µV

RMS

March 2012

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PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

Electrical Characteristics (cont.) (Test conditions: T

LM4040-3.0

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= 25°C, unless otherwise specified.)

AMB

LM4040

Symbol Parameter

Reverse breakdown
voltage

V

REF

Reverse breakdown
voltage tolerance

I

= 100µA

R

I

= 100µA

R

Conditions

T

AMB

Typ.

25°C 3.0 V
25°C

-40 to +85°C ±26 ±34 ±59

LM4040

B Limits

LM4040

C Limits

LM4040

D Limits

±6 ±15 ±30

Units

mV

-40 to +125°C TBD ±45 ±75
25°C 47 62 62 67

I

RMIN

ΔVR/ΔT

ΔVR/ΔIR

ZR

en

VR

V

HYST

Minimum operating
current

Average reverse
breakdown voltage
temperature coefficient

Reverse breakdown
change with current

Dynamic output
impedance

Noise voltage
Long term stability (non

cumulative)
Themal hysteresis ΔT = -40°C to = 125°C 0.08 %

-40 to +85°C

-40 to +125°C 70 70 75

I

= 10mA

R

IR = 1mA

-40 to +125°C

IR = 100µA

I

RMIN IR

< 1mA

1mA < IR
< 15mA

25°C 0.4 0.8 0.8 1.0

-40 to +85°C

-40 to +125°C 1.1 1.1 1.3
25°C 2.7 6.0 6.0 8.0

-40 to +85°C

-40 to +125°C 9.0 9.0 11.0

IR = 1mA, f = 120Hz
I

= 0.1IR

AC

IR = 100µA
10Hz < f < 10kHz

t = 1000Hrs, IR = 100µA

67 67 72

±20
±15 ±100 ±100 ±150 ppm/°C
±15

1.1 110 1.3

9.0 9.0 11.0

0.4 0.9 0.9 1.2 Ω

35

120 ppm

µV

µA

mV

RMS

LM4040

Document number: DS33195 Rev. 5 - 2

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