3ppm/°C, Low-Power, Low-Dropout Voltage Reference · voltage reference features a low 3ppm/°C (max) temper-ature coefficient and a low dropout voltage (200mV, max). This series-mode

General DescriptionThe MAX6133 high-precision, low-power, low-dropoutvoltage reference features a low 3ppm/°C (max) temper-ature coefficient and a low dropout voltage (200mV,max). This series-mode device features bandgap tech-nology for low-noise performance and excellent accura-cy. Load regulation specifications are guaranteed forsource currents up to 15mA. The laser-trimmed, high-stability thin-film resistors, together with post-packagetrimming, guarantee an excellent initial accuracy specifi-cation (0.04%, max). The MAX6133 is a series voltagereference and consumes only 40µA of supply current(virtually independent of supply voltage). Series-modereferences save system power and use minimal externalcomponents compared to 2-terminal shunt references.

The MAX6133 is available in 8-pin µMAX and SO pack-ages. The unique blend of tiny packaging and excellentprecision performance make these parts ideally suitedfor portable and communication applications.

ApplicationsPrecision RegulatorsA/D and D/A ConvertersPower SuppliesHigh-Accuracy Industrial and Process ControlHand-Held Instruments

Features� Low Temperature Coefficient

3ppm/°C (max), SO5ppm/°C (max), µMAX

� Tiny 5mm ✕ 3mm µMAX Package

� Low 200mV (max) Dropout Voltage

� Low 40µA Quiescent Current

� ±0.04% (max) Initial Accuracy

� Low 16µVP-P Noise (0.1Hz to 10Hz) (2.5V Output)

� 15mA Output Source-Current Capability

� Wide 2.7V to 12.6V Supply Voltage

� Excellent Line (30µV/V, max) and Load (0.05mV/mA, max) Regulation

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3ppm/°C, Low-Power, Low-DropoutVoltage Reference

________________________________________________________________ Maxim Integrated Products 1

OUT

I.C.*GND

1

2

8

7

I.C.*

*INTERNALLY CONNECTED, DO NOT CONNECT.

N.C.IN

N.C.

N.C.

SO/µMAX

TOP VIEW

3

4

6

5

MAX6133

Pin Configuration

Ordering Information

MAX6133

OUT

SUPPLY INPUT

GND

*INPUT CAPACITORS ARE OPTIONAL.

IN

0.1µF*

REFERENCEOUTPUT

0.1µF

Typical Operating Circuit

19-2266; Rev 2; 6/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Note: Two-number part suffix indicates output voltage option.

PART TEMP RANGE PIN-PACKAGEMAXIMUM INITIALACCURACY (%)

MAXIMUM TEMPCO(ppm/°C, -40°C to +85°C)

MAX6133A_ _ -40°C to +125°C 8 µMAX 0.06 5

MAX6133AASA_ _ -40°C to +125°C 8 SO 0.04 3

MAX6133BASA_ _ -40°C to +125°C 8 SO 0.08 5

Selector Guide

SUFFIX VOLTAGE OUTPUT

25 2.500V

30 3.000V

41 4.096V

50 5.000V

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2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX6133_25 (VOUT = 2.500V)(VIN = 5V, CLOAD = 0.1µF, IOUT = 0, TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.

Voltage (with Respect to GND)IN ........................................................................-0.3V to +13VOUT..............................................-0.3V to +6V or (VIN + 0.3V)

OUT Short Circuit to IN or GND Duration ...............................60sContinuous Power Dissipation (TA = +70°C)

8-Pin µMAX (derate 5.5mW/°C above +70°C) .............362mW8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

Operating Temperature Range .........................-40°C to +125°CStorage Temperature Range .............................-65°C to +150°CJunction Temperature ......................................................+150°CLead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

A grade SO 2.4990 2.5000 2.5010

B grade SO 2.4980 2.5000 2.5020Output Voltage VOUT TA = +25°C

µMAX 2.4985 2.5000 2.5015

V

A grade SO -0.04 +0.04

B grade SO -0.08 +0.08Output VoltageAccuracy

TA = +25°C

µMAX -0.06 +0.06

%

TA = -40°C to +85°C 1 3A grade SO

TA = -40°C to +125°C 4 7

TA = -40°C to +85°C 3 5B grade SO

TA = -40°C to +125°C 5 10

TA = -40°C to +85°C 1 5

Output VoltageTemperatureCoefficient (Note 1)

TCVOUT

µMAXTA = -40°C to +125°C 2 7

ppm/°C

Input Voltage Range VIN Inferred from line regulation 2.7 12.6 V

Line Regulation ∆VOUT/∆VIN 2.7V ≤ VIN ≤ 12.6V 2 30 µV/V

Load Regulation ∆VOUT/∆IOUT -100µA ≤ IOUT ≤ 15mA 0.003 0.05 mV/mA

∆VOUT = 0.1%, IOUT = 1mA 0.02 0.2Dropout Voltage(Note 2)

VDO ∆VOUT = 0.1%, IOUT = 10mA 0.2 0.4V

TA = +25°C 40 60Quiescent SupplyCurrent

IINTA = -40°C to +125°C 85

µA

Short to GND: VOUT = 0V 90Output Short-CircuitCurrent

ISCShort to VIN: VOUT = VIN -2

mA

0.1Hz ≤ f ≤ 10Hz 16 µVP-POutput Voltage Noise en 10Hz ≤ f ≤ 1kHz 12 µVRMS

Turn-On Settling Time tON VOUT settles to ±0.01% of final value 500 µs

Thermal Hysteresis(Note 3)

120 ppm

SO 40Long-Term Stability ∆t = 1000 hours

µMAX 145ppm

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_______________________________________________________________________________________ 3



A grade SO 2.9988 3.0000 3.0012


µMAX 2.9982 3.0000 3.0018

V

A grade SO -0.04 +0.04


TA = +25°C

µMAX -0.06 +0.06

%


TA = -40°C to +125°C 4 7


TA = -40°C to +125°C 5 10

TA = -40°C to +85°C 1 5


TCVOUT

µMAXTA = -40°C to +125°C 2 7

ppm/°C





VDO∆VOUT = 0.1%, IOUT = 10mA 0.2 0.4

V


IINTA = -40°C to +125°C 85

µA



mA

0.1Hz ≤ f ≤ 10Hz 24 µVP-POutput Voltage Noise en

10Hz ≤ f ≤ 1kHz 15 µVRMS



120 ppm


µMAX 145ppm

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4 _______________________________________________________________________________________



A grade SO 4.0943 4.0960 4.0977


µMAX 4.0935 4.0960 4.0985

V

A grade SO -0.04 +0.04


TA = +25°C

µMAX -0.06 +0.06

%


TA = -40°C to +125°C 4 7


TA = -40°C to +125°C 5 10

TA = -40°C to +85°C 1 5


TCVOUT

µMAXTA = -40°C to +125°C 2 7

ppm/°C





VDO∆VOUT = 0.1%, IOUT = 10mA 0.2 0.4

V


IINTA = -40°C to +125°C 85

µA



mA





120 ppm


µMAX 145ppm

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_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—MAX6133_50 (VOUT = 5.000V)(VIN = 5.5V, CLOAD = 0.1µF, IOUT = 0, TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.)


A grade SO 4.9980 5.0000 5.0020


µMAX 4.9970 5.0000 5.0030

V

A grade SO -0.04 +0.04


TA = +25°C

µMAX -0.06 +0.06

%


TA = -40°C to +125°C 4 7


TA = -40°C to +125°C 5 10

TA = -40°C to +85°C 1 5


TCVOUT

µMAXTA = -40°C to +125°C 2 7

ppm/°C





VDO∆VOUT = 0.1%, IOUT = 10mA 0.2 0.4

V


IINTA = -40°C to +125°C 85

µA



mA





120 ppm


µMAX 145ppm

Note 1: The MAX6133 is 100% drift-tested for TA = TMIN to TMAX, as specified.Note 2: Dropout Voltage is the minimum voltage at which VOUT changes ≤ 0.1% from VOUT at VIN = 5V (VIN = 5.5V for VOUT = 5V).Note 3: Thermal Hysteresis is defined as the change in the initial +25°C output voltage after cycling the device from TMAX to TMIN.

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6 _______________________________________________________________________________________

Typical Operating Characteristics(VIN = 5V, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 4)

SUPPLY CURRENT vs. INPUT VOLTAGE(VOUT = 2.5V)

MAX

6133

toc0

9

INPUT VOLTAGE (V)

SUPP

LY C

URRE

NT (µ

A)

12119 103 4 5 6 7 81 2

15

30

45

60

75

90

105

120

135

150

00 13

TA = +85°CTA = +125°C

TA = +25°C TA = -40°C

-120

-80

-100

-60

-40

-20

0

0.0001 0.010.001 0.1 10 100 1000

POWER-SUPPLY REJECTION RATIOvs. FREQUENCY (VOUT = 5V)

MAX

6133

toc0

8

FREQUENCY (kHz)

PSRR

(dB)

1

VIN = 5.5V

POWER-SUPPLY REJECTION RATIOvs. FREQUENCY (VOUT = 2.5V)

FREQUENCY (kHz)0.0001 0.1 10 1000.001 0.01 1000

PSRR

(dB)

0

-120

-100

-80

-60

-40

-20 MAX

6133

toc0

7

1

DROPOUT VOLTAGE vs. OUTPUT CURRENT(VOUT = 5V)

MAX

6133

toc0

6

OUTPUT CURRENT (mA)

DROP

OUT

VOLT

AGE

(mV)

181612 144 6 8 102

50100150200250300350400450500550600

00 20

TA = +85°C

TA = +125°C

TA = +25°C

TA = -40°C

VIN = 5.5V

DROPOUT VOLTAGE vs. OUTPUT CURRENT(VOUT = 2.5V)

MAX

6133

toc0

5

OUTPUT CURRENT (mA)

DROP

OUT

VOLT

AGE

(mV)

18161412108642

100

200

300

400

500

600

700

00 20

TA = +85°C

TA = +125°C

TA = +25°C

TA = -40°C

LOAD REGULATION(VOUT = 5V)

MAX

6133

toc0

4

OUTPUT CURRENT (mA)

OUTP

UT V

OLTA

GE (V

)

182 4 6 10 12 148 16

4.9985

4.9990

4.9995

5.0000

5.0005

5.0010

5.0015

5.0020

4.99800 20

TA = +25°C

VIN = 5.5V

TA = +125°C

TA = +85°CTA = -40°C

LOAD REGULATION(VOUT = 2.5V)

MAX

6133

toc0

3

OUTPUT CURRENT (mA)

OUTP

UT V

OLTA

GE (V

)

201814 164 6 8 10 122

2.5005

2.5010

2.4990

2.4995

2.5000

2.5015

2.5020

2.5025

2.5030

2.5035

2.5040

0

TA = +25°C

TA = +125°C

TA = +85°C

TA = -40°C

OUTPUT VOLTAGE vs. TEMPERATURE(VOUT = 5V)

MAX

6133

toc0

2

TEMPERATURE (°C)

OUTP

UT V

OLTA

GE (V

)

1109565 80-10 5 20 35 50-25

4.9985

4.9990

4.9995

5.0000

5.0005

5.0010

4.9980-40 125

3 TYPICAL UNITSVIN = 5.5V

OUTPUT VOLTAGE vs. TEMPERATURE(VOUT = 2.5V)

MAX

6133

toc0

1

TEMPERATURE (°C)

OUTP

UT V

OLTA

GE (V

)

1109565 80-10 5 20 35 50-25

2.4994

2.4996

2.4998

2.5000

2.5002

2.5004

2.5006

2.5008

2.5010

2.4992-40 125

3 TYPICAL UNITS

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_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)(VIN = 5V, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 4)

LOAD TRANSIENT(VOUT = 2.5V)

MAX6133 toc15

2.5V

0mA

10mA

IOUT10mA/div

VOUT50mV/divAC-COUPLED

400µs/div

COUT = 10µF


MAX6133 toc14

2.5V

-100µA

1mA

1ms/div

IOUT1mA/div


COUT = 0.1µF


MAX6133 toc13

2.5V

0mA

10mA IOUT10mA/div


400µs/div

COUT = 0.1µF

0.1Hz TO 10Hz OUTPUT NOISE(VOUT = 5V)

MAX6133 toc12

VOUT10µV/div

1s/div

VIN = 5.5V

0.1Hz TO 10Hz OUTPUT NOISE(VOUT = 2.5V)

MAX6133 toc11

VOUT4µV/div

1s/div

SUPPLY CURRENT vs. INPUT VOLTAGE(VOUT = 5V)

MAX

6133

toc1

0

INPUT VOLTAGE (V)

SUPP

LY C

URRE

NT (µ

A)

12119 103 4 5 6 7 81 2

20

40

60

80

100

120

140

160

180

200

220

00 13

TA = +85°C

TA = +125°C

TA = +25°CTA = -40°C

VIN = 5.5V

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8 _______________________________________________________________________________________


TURN-ON TRANSIENT(VOUT = 2.5V)

MAX6133 toc21

5V

0V

2.5V VOUT1V/div

VIN2V/div

2ms/div

COUT = 10µF

0V

TURN-ON TRANSIENT(VOUT = 5V)

MAX6133 toc20

5.5V

0V

5VVOUT2V/div

VIN2V/div

400µs/div

VIN = 5.5VCOUT = 0.1µF

0V

TURN-ON TRANSIENT(VOUT = 2.5V)

MAX6133 toc19

5V

0V

2.5VVOUT1V/div

VIN2V/div

100µs/div

0V

COUT = 0.1µF

LINE TRANSIENT(VOUT = 5V)

MAX6133 toc18

6.5V

5V

5.5V


VIN500mV/divAC-COUPLED

1ms/div

COUT = 0.1µF VIN = 5.5V

LINE TRANSIENT(VOUT = 2.5V)

MAX6133 toc17

5.5V

2.5V

4.5V


VIN500mV/divAC-COUPLED

400µs/div

COUT = 0.1µF


MAX6133 toc16

2.5V

-100µA

1mA

IOUT1mA/div


1ms/div

COUT = 10µF

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_______________________________________________________________________________________ 9

TURN-ON TRANSIENT(VOUT = 5V)

MAX6133 toc22

5.5V

0V

5V

VOUT2V/div

VIN2V/div

2ms/div

0V

VIN = 5.5VCOUT = 10µF

2.5001

2.5003

2.5002

2.5005

2.5004

2.5007

2.5006

2.5008

0 400200 600 800100 500300 700 900 1000

LONG-TERM STABILITY vs. TIME(VOUT = 2.5V)

MAX

6133

toc2

3

TIME (HOURS)

V OUT

(V)

2 TYPICAL UNITSSO PACKAGE

2.4994

2.5000

2.4998

2.5004

2.5002

2.5008

2.5006

2.5010

0 400200 600 800100 500300 700 900 1000


MAX

6133

toc2

4

TIME (HOURS)

V OUT

(V)

2.4996

2 TYPICAL UNITSµMAX PACKAGE

5.0000

5.00035.0002

5.00055.0004

5.00075.0006

5.0008

0 400200 600 800100 500300 700 900 1000


MAX

6133

toc2

5

TIME (HOURS)

V OUT

(V)

5.0001

4.99994.9998

4.99974.9996

2 TYPICAL UNITSSO PACKAGE

5.0004

5.0008

5.0010

5.0012

5.0014

0 400200 600 800100 500300 700 900 1000


MAX

6133

toc2

6

TIME (HOURS)

V OUT

(V)

5.0006

5.0002

5.0000

2 TYPICAL UNITSµMAX PACKAGE

Note 4: Many of the MAX6133 Typical Operating Characteristics are extremely similar. The extremes of these characteristics arefound in the MAX6133 (2.5V output) and the MAX6133 (5V output). The Typical Operating Characteristics of the remainderof the MAX6133 family typically lie between these two extremes and can be estimated based on their output voltages.


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10 ______________________________________________________________________________________

Applications InformationBypassing/Load Capacitance

For the best line-transient performance, decouple theinput with a 0.1µF ceramic capacitor as shown in theTypical Operating Circuit. Place the capacitor as closeto IN as possible. When transient performance is lessimportant, no capacitor is necessary. The MAX6133family requires a minimum output capacitance of 0.1µFfor stability and is stable with capacitive loads (includ-ing the bypass capacitance) of up to 100µF. In applica-tions where the load or the supply can experience stepchanges, a larger output capacitor reduces the amountof overshoot (undershoot) and improves the circuit’stransient response. Place output capacitors as close tothe device as possible.

Supply CurrentThe quiescent supply current of the MAX6133 seriesreference is typically 40µA and is virtually independentof the supply voltage. In the MAX6133 family, the loadcurrent is drawn from the input only when required, sosupply current is not wasted and efficiency is maxi-mized at all input voltages. This improved efficiencyreduces power dissipation and extends battery life.When the supply voltage is below the minimum-speci-fied input voltage (as during turn-on), the devices candraw up to 150µA beyond the nominal supply current.The input voltage source must be capable of providingthis current to ensure reliable turn-on.

Thermal HysteresisThermal hysteresis is the change in the output voltageat TA = +25°C before and after the device is cycledover its entire operating temperature range. Hysteresisis caused by differential package stress appearingacross the bandgap core transistors. The typical ther-mal hysteresis value is 120ppm for both SO and µMAXpackages.

Turn-On TimeThese devices typically turn on and settle to within0.01% of their final value in <1ms. The turn-on time canincrease up to 2ms with the device operating at theminimum dropout voltage and the maximum load.

Low-Power, 14-Bit DACwith MAX6133 as a Reference

Figure 1 shows a typical application circuit for theMAX6133 providing both the power supply and precisionreference voltage for a 14-bit high-resolution, serial-input, voltage-output digital-to-analog converter. TheMAX6133 with a 2.5V output provides the reference volt-age for the DAC.

Pin Description

PIN NAME FUNCTION

1, 3, 7 N.C. No Connection. Not connected internally. Leave unconnected or connect to GND.

2 IN Positive Power-Supply Input

4 GND Ground

5, 8 I.C. Internally Connected. Do not connect externally.

6 OUT Reference Output Voltage. Connect a 0.1µF minimum capacitor to GND.

MAX5143MAX6133REF

3V SUPPLY

GND

OUT

GND

IN

ANALOGOUTPUT

VDD

2.5V

Figure 1. 14-Bit High-Resolution DAC and Positive ReferenceFrom a Single 3V Supply

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TEMPERATURECOEFFICIENT

(ppm/°C)

1 10 100

16 BIT

14 BIT

12 BIT

10 BIT

8 BIT

0.01

0.1

10

100

1000

1

10,000

18 BIT

20 BIT

OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)

Figure 3. Temperature Coefficient vs. Operating Temperature Range for a 1LSB Maximum Error

Negative Low-Power Voltage ReferenceAs shown in Figure 2, the MAX6133 can be used todevelop a negative voltage reference using theMAX400, a rail-to-rail op-amp with low power, lownoise, and low offset. The circuit only provides a goodnegative reference and is ideal for space- and cost-sensitive applications since it does not use resistors.

Temperature Coefficient vs.Operating Temperature Range

for a 1LSB Maximum ErrorIn a data converter application, the converter’s refer-ence voltage must stay within a certain limit to keep theerror in the data converter smaller than the resolutionlimit through the operating temperature range. Figure 3shows the maximum allowable reference-voltage tem-perature coefficient that keeps the conversion error toless than 1LSB. This is a function of the operating tem-perature range (TMAX - TMIN) with the converter resolu-tion as a parameter. The graph assumes thereference-voltage temperature coefficient as the onlyparameter affecting accuracy. In reality, the absolutestatic accuracy of a data converter is dependent on thecombination of many parameters such as integral non-linearity, differential nonlinearity, offset error, gain error,as well as voltage reference changes.

Chip InformationTRANSISTOR COUNT: 656

PROCESS: BiCMOS

MAX6133OUT

POSITIVE SUPPLY

GND

IN

-VOUT

0.1µF

0.1µF

MAX400

V+

V-

0.1µF

0.1µF

Figure 2. Negative Low-Power Voltage Reference

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Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

SO

ICN

.EP

S

PACKAGE OUTLINE, .150" SOIC

11

21-0041 BREV.DOCUMENT CONTROL NO.APPROVAL

PROPRIETARY INFORMATION

TITLE:

TOP VIEW

FRONT VIEW

MAX

0.010

0.069

0.019

0.157

0.010

INCHES

0.150

0.007

E

C

DIM

0.014

0.004

B

A1

MIN

0.053A

0.19

3.80 4.00

0.25

MILLIMETERS

0.10

0.35

1.35

MIN

0.49

0.25

MAX

1.75

0.0500.016L 0.40 1.27

0.3940.386D

D

MINDIM

D

INCHES

MAX

9.80 10.00

MILLIMETERS

MIN MAX

16 AC

0.337 0.344 AB8.758.55 14

0.189 0.197 AA5.004.80 8

N MS012

N

SIDE VIEW

H 0.2440.228 5.80 6.20

e 0.050 BSC 1.27 BSC

C

HE

e B A1

A

D

0∞-8∞L

1

VARIATIONS:

http://www.maxim-ic.com/packages

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Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13

© 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

8LU

MA

XD

.EP

S

PACKAGE OUTLINE, 8L uMAX/uSOP

11

21-0036 JREV.DOCUMENT CONTROL NO.APPROVAL

PROPRIETARY INFORMATION

TITLE:

MAX0.043

0.006

0.014

0.120

0.120

0.198

0.026

0.007

0.037

0.0207 BSC

0.0256 BSC

A2 A1

ce

b

A

L

FRONT VIEW SIDE VIEW

E H

0.6±0.1

0.6±0.1

ÿ 0.50±0.1

1

TOP VIEW

D

8

A2 0.030

BOTTOM VIEW

16∞

S

b

L

HE

De

c

0∞

0.010

0.116

0.116

0.188

0.016

0.005

84X S

INCHES

-

A1

A

MIN

0.002

0.950.75

0.5250 BSC

0.25 0.36

2.95 3.05

2.95 3.05

4.78

0.41

0.65 BSC

5.03

0.66

6∞0∞

0.13 0.18

MAXMIN

MILLIMETERS

- 1.10

0.05 0.15

α

α

DIM

Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

http://www.maxim-ic.com/packages

Documents

3ppm/°C, Low-Power, Low-Dropout Voltage Reference · voltage reference features a low 3ppm/°C (max) temper-ature coefficient and a low dropout voltage (200mV, max). This series-mode