MAXIM MAX6225, MAX6241, MAX6250 Technical data

General Description

The MAX6225/MAX6241/MAX6250 are low-noise, preci­sion voltage references with extremely low 1ppm/°C
temperature coefficients and excellent ±0.02% initial
accuracy. These devices feature buried-zener technolo­gy for lowest noise performance. Load-regulation speci­fications 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 exter­nal 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/1000hr Long-Term Stability

♦ Stable for All Capacitive Loads

MAX6225/MAX6241/MAX6250

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

Voltage References

________________________________________________________________ Maxim Integrated Products 1

Typical Operating Circuit

OUT

NR

TRIM

GND

1

2

8

7

I.C.

I.C.

IN

I.C.

MAX6225
MAX6241
MAX6250

DIP/SO

TOP VIEW

I.C. = INTERNALLY CONNECTED; DO NOT USE

3

4

6

5

Pin Configuration

19-1139; Rev 4; 1/01

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

0°C to +70°C 5.0

2.0

5.0

2.0

8 SO

8 Plastic DIP

8 Plastic DIP

8 SO

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

PART TEMP. RANGE

MAX
TEMPCO
(ppm/

°C)

PIN­PACKAGE

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 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.

8V TO 36V INPUT

MAX6225

*

2.2µF

*OPTIONAL

MAX6241

NR

MAX6250

IN

GND

OUT

TRIM

REFERENCE OUT

*

2.2µF

MAX6225/MAX6241/MAX6250

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX6225

(VIN= +10V, I

OUT

= 0mA, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +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

IN

≤ 12V)..........Continuous

OUT Short-Circuit to GND Duration (V

IN

≤ 40V) ........................5s

OUT Short-Circuit to IN Duration (V

IN

≤ 12V) ..............Continuous

Continuous Power Dissipation (T

A

= +70°C)

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

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

8-Pin 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, 10s)...................................+300°C

V

836V

IN

Input Voltage Range

UNITSMIN TYP MAXSYMBOLPARAMETER

C, E, M

T

A

V

2.499 2.500 2.501

V

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

IN

+25°C 10 18

ppm/V

MAX6225A

MAX6225AC_A

MAX6225AE_A

CONDITIONS

8V ≤ VIN≤ 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 ≤ VIN≤ 36V

+25°C 25

C 7

E 8

M 10

+25°C

+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)

(VIN= +10V, I

OUT

= 0mA, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 4) 20 ppmTemperature Hysteresis +25°C

CONDITIONS

C 16

E

Long-Term Stability ∆V

OUT

/ t

17

+25°C 20

M 315

ppm/

1000hr

C 16

Figure 1

0.1Hz ≤ f ≤ 10Hz

E

10Hz ≤ f ≤ 1kHz

17

M 10 30

+25°C 1.8 2.7

Supply Current I

IN

C, E, M 3.0

mA

Trim-Adjustment Range

UNITSMIN TYP MAXSYMBOLPARAMETER

∆V

OUT

C, E, M ±15 ±25 mV

1.5 µV

p-p

Output Noise Voltage (Note 3) e

n

+25°C 1.3 2.8 µV

RMS

T

A

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

ON

+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

ppm/mA

MAX6225/MAX6241/MAX6250

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

4 _______________________________________________________________________________________

(Note 4)

V

4.095 4.096 4.097

V

OUT

Output Voltage

+25°C

20 ppmTemperature Hysteresis

C 1.0 2.0

MAX6241A

Output Voltage Temperature
Coefficient (Note 1)

TCV

OUT

E 1.5 3.0

ppm/°C

+25°C

+25°C 10 18

MAX6241AC_A

MAX6241AE_A

CONDITIONS

20

ppm/

1000hr

8V ≤ VIN≤ 10V

Long-Term Stability ∆V

OUT

/ t +25°C

Line Regulation (Note 2)

∆V

OUT

/

∆V

IN

ppm/V

Figure 1

0.1Hz ≤ f ≤ 10Hz

10Hz ≤ f ≤ 1kHz

V836V

IN

Input Voltage Range

+25°C 1.9 2.9

I

IN

C, E, M 3.2

mA

Trim-Adjustment Range

UNITSMIN TYP MAXSYMBOLPARAMETER

∆V

OUT

C, E, M ±24 ±40 mV

2.4 µVp-p

Output Noise Voltage (Note 3) e

n

+25°C

2.0 4.0 µV

RMS

C, E, M

T

A

ELECTRICAL CHARACTERISTICS—MAX6241

(VIN= +10V, I

OUT

= 0mA, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

M 2.0 5.0

C 2.5 5.0

MAX6241AMJA

MAX6241BC_A

E 2.5 7.0

M 2.5 8.0

MAX6241BE_A

MAX6241BMJA

4.092 4.096 4.100MAX6241B

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

ON

+25°C 8 µs

C 30

E 35

M 45

+25°C 25

10V ≤ VIN≤ 36V

C 7

E 8

M 10

Supply Current

C 16

E 17

M 39

C 16

E 17

M 718

+25°C

+25°C

Sourcing: 0mA ≤ I

OUT

≤ 15mA

Sinking: -15mA ≤ I

OUT

≤ 0mA

∆V

OUT

/

∆I

OUT

Load Regulation (Note 2) ppm/mA