General Description

The MAX6225/MAX6241/MAX6250 are low-noise, preci-

sion voltage references with extremely low 1ppm/°C

temperature coefficients and excellent ±0.02% initial

accuracy. These devices feature buried-zener technolo-

gy for lowest noise performance. Load-regulation speci-

fications are guaranteed for source and sink currents

up to 15mA. Excellent line and load regulation and low

output impedance at high frequency make them ideal

for high-resolution data-conversion systems up to

16 bits.

The MAX6225 is set for 2.500V output, the MAX6241 is

set for 4.096V output, and the MAX6250 is set for

5.000V output. All three provide for the option of exter-

nal trimming and noise reduction.

Applications

High-Resolution Analog-to-Digital

and Digital-to-Analog Converters

High-Accuracy Reference Standard

High-Accuracy Industrial and Process Control

Digital Voltmeters

ATE Equipment

Precision Current Sources

____________________________Features

♦ Low 1.0ppm/°C Temperature Coefficient

♦ Very Low 1.5µVp-p Noise (0.1Hz to 10Hz)

♦ ±0.02% Initial Accuracy

♦ ±15mA Output Source and Sink Current

♦ Low, 18mW Power Consumption (MAX6225)

♦ Industry-Standard Pinout

♦ Optional Noise Reduction and Voltage Trim

♦ Excellent Transient Response

♦ 8-Pin SO Package Available

♦ Low 20ppm/1000h Long-Term Stability

♦ Stable for All Capacitive Loads

MAX6225/MAX6241/MAX6250

Low-Noise, Precision, +2.5V/+4.096V/+5V

Voltage References

________________________________________________________________

Maxim Integrated Products

REFERENCE OUT

GND

*OPTIONAL

TRIM

OUT

8V TO 36V INPUT

2.2µF

MAX6225

MAX6241

MAX6250

Typical Operating Circuit

OUT

TRIM

GND

I.C.

MAX6225

MAX6241

MAX6250

DIP/SO

TOP VIEW

I.C. = INTERNALLY CONNECTED; DO NOT USE

Pin Configuration

19-1139; Rev 3; 5/98

Ordering Information

Ordering Information continued at end of data sheet.

MAX6225BCSA

MAX6225ACPA

MAX6225BCPA

MAX6225ACSA 0°C to +70°C

0°C to +70°C

0°C to +70°C 5.0

2.0

5.0

2.0

8 SO

8 Plastic DIP

8 SO

MAX6225AEPA -40°C to +85°C 3.08 Plastic DIP

PART TEMP. RANGE

MAX

TEMPCO

(ppm/

°C)

PIN-

PACKAGE

MAX6225BEPA -40°C to +85°C 7.08 Plastic DIP

MAX6225AESA -40°C to +85°C 3.08 SO

MAX6225BESA -40°C to +85°C 7.08 SO

MAX6225AMJA -55°C to +125°C 5.08 CERDIP

MAX6225BMJA -55°C to +125°C 8.08 CERDIP

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

MAX6225/MAX6241/MAX6250

Low-Noise, Precision, +2.5V/+4.096V/+5V

Voltage References

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX6225

= 10V, I

OUT

= 0mA, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

(Voltages Referenced to GND)

IN..............................................................................-0.3V to +40V

OUT, TRIM ...............................................................-0.3V to +12V

NR ..............................................................................-0.3V to +6V

OUT Short Circuit to GND Duration (V

≤ 12V)..........Continuous

OUT Short Circuit to GND Duration (V

≤ 40V) ....................5sec

OUT Short Circuit to IN Duration (V

≤ 12V) ..............Continuous

Continuous Power Dissipation (T

= +70°C)

Plastic DIP (derate 9.09mW/°C above +70°C)................727mW

SO (derate 5.88mW/°C above +70°C) ............................471mW

CERDIP (derate 8.00mW/°C above +70°C) ....................640mW

Operating Temperature Ranges

MAX62_ _ _C_ A.....................................................0°C to +70°C

MAX62_ _ _E_ A..................................................-40°C to +85°C

MAX62_ _ _MJA ................................................-55°C to +125°C

Storage Temperature Range ..............................-65°C to +150°C

Lead Temperature (soldering, 10sec)...............................+300°C

8 36V

Input Voltage Range

UNITSMIN TYP MAXSYMBOLPARAMETER

C, E, M

2.499 2.500 2.501

OUT

Output Voltage

C 1.0 2.0

Output Voltage Temperature

Coefficient (Note 1)

TCV

OUT

E 1.5 3.0

ppm/°C

Line Regulation (Note 2)

∆V

OUT

∆V

+25°C 10 18

ppm/V

MAX6225A

MAX6225AC_A

MAX6225AE_A

CONDITIONS

8V ≤ V

≤ 10V

2.497 2.500 2.503MAX6225B

M 2.0 5.0

C 2.5 5.0

MAX6225AMJA

MAX6225BC_A

E 2.5 7.0

M 2.5 8.0

MAX6225BE_A

MAX6225BMJA

C 30

E 35

M 45

10V ≤ V

≤ 36V

+25°C 2 5

C 7

E 8

M 10

+25°C

Sinking: -15mA ≤ I

OUT

≤ 0mA

MAX6225/MAX6241/MAX6250

Low-Noise, Precision, +2.5V/+4.096V/+5V

Voltage References

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX6225 (continued)

= 10V, I

OUT

= 0mA, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

(Note 4) 20 ppmTemperature Hysteresis +25°C

CONDITIONS

C 1 6

Long-Term Stability ∆V

OUT

/ t

1 7

+25°C 20

M 3 15

ppm/

1000h

C 1 6

Figure 1

0.1Hz ≤ f ≤ 10Hz

10Hz ≤ f ≤ 1kHz

1 7

M 10 30

+25°C 1.8 2.7

Supply Current I

C, E, M 3.0

Trim-Adjustment Range

UNITSMIN TYP MAXSYMBOLPARAMETER

∆V

OUT

C, E, M ±15 ±25 mV

1.5 µVp-p

Output Noise Voltage (Note 3) e

+25°C 1.3 2.8 µV

RMS

To ±0.01% of final valueTurn-On Settling Time t

+25°C 5 µs

+25°C

Sourcing: 0mA ≤ I

OUT

≤ 15mA

ppm/mA

∆V

OUT

∆I

OUT

Load Regulation (Note 2)

Sinking: -15mA ≤ I

OUT

≤ 0mA

Part #	MAX6241BESA
Description	LOW-NOISE, LOW-DRIFT, PRECISION, +2.5V /+4.09 - Bulk
Category	IC
Availability	In Stock
Qty	17

MAX6241BESA

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