Maxim MAX6350MJA, MAX6350CPA, MAX6350CSA, MAX6350EPA, MAX6350ESA Datasheet

_______________General Description

The MAX6325/MAX6341/MAX6350 are low-noise, preci­sion voltage references with extremely low, 0.5ppm/°C
typical 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 frequencies make
them ideal for high-resolution data-conversion systems
up to 16 bits.

The MAX6325 is set for a 2.500V output, the MAX6341
is set for a 4.096V output, and the MAX6350 is set for a

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

♦ Ultra-Low, 1ppm/°C Max Tempco
♦ Very Low, 1.5µVp-p Noise (0.1Hz to 10Hz)

(MAX6325)

♦ ±0.02% Initial Accuracy (MAX6350)
♦ ±15mA Output Source and Sink Current
♦ Low, 18mW Power Consumption (MAX6325)
♦ Industry-Standard Pinout
♦ Optional Noise Reduction and Voltage Trim
♦ Excellent Transient Response
♦ 8-Pin SO Package Available
♦ Low, 30ppm/1000h Long-Term Stability
♦ Stable for All Capacitive Loads

MAX6325/MAX6341/MAX6350

1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V

Voltage References

________________________________________________________________

Maxim Integrated Products

1

REFERENCE OUT

GND

NR

*OPTIONAL

TRIM

OUT

IN

8V TO 36V INPUT

*

2.2µF

*

2.2µF

MAX6325
MAX6341
MAX6350

__________Typical Operating Circuit

OUT

NR

TRIM

GND

1

2

8

7

I.C.
I.C.

IN

I.C.

MAX6325
MAX6341

MAX6350

DIP/SO

TOP VIEW

I.C. = INTERNALLY CONNECTED; DO NOT USE

3

4

6

5

__________________Pin Configuration

19-1203; Rev 0; 4/97

______________Ordering Information

Ordering Information continued at end of data sheet.

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

MAX6325CPA

MAX6325CSA 0°C to +70°C

0°C to +70°C 1.0

1.0

8 Plastic DIP
8 SO

MAX6325EPA -40°C to +85°C 1.58 Plastic DIP

PART TEMP. RANGE

MAX
TEMPCO
(ppm/

°C)

PIN-

PACKAGE

MAX6325ESA -40°C to +85°C 1.58 SO
MAX6325MJA -55°C to +125°C 2.58 CERDIP

MAX6325/MAX6341/MAX6350

1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V
Voltage References

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX6325

(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) ....................5sec

OUT Short Circuit to IN Duration (V

IN

≤ 12V) ..............Continuous

Continuous Power Dissipation (T

A

= +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

MAX63_ _ C_ A.......................................................0°C to +70°C

MAX63_ _ E_ A....................................................-40°C to +85°C

MAX63_ _ MJA..................................................-55°C to +125°C

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

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

Load Regulation (Note 2)

∆V

OUT

/

∆I

OUT

ppm/mA

+25°C

+25°C

µs5+25°Ct

ON

Turn-On Settling Time To ±0.01% of final value

µV

RMS

1.3 2.8+25°C

e

n

Output Noise Voltage (Note 3)

µVp-p1.5

mV±15 ±25C, E, M∆V

OUT

Trim-Adjustment Range

mA

3.0C, E, M

I

IN

Supply Current

1.8 2.7+25°C

10 30M

1 7

10Hz ≤ f ≤ 1kHz

E

0.1Hz ≤ f ≤ 10Hz

Figure 1

1 6C

ppm/

1000h

3 15M

30+25°C

1 7

∆V

OUT

/ tLong-Term Stability

E

1 6C

+25°CTemperature Hysteresis ppm20(Note 4)

10M

8E

7C

2 5+25°C

10V ≤ VIN≤ 36V

45M

35E

30C

MAX6325MJA 1.0 2.5M

8V ≤ VIN≤ 10V

CONDITIONS

MAX6325E_A

MAX6325C_A

MAX6325

ppm/V

10 18+25°C

∆V

OUT

/

∆

V

IN

Line Regulation (Note 2)

ppm/°C0.75 1.5ETCV

OUT

Output Voltage Temperature
Coefficient (Note 1)

0.5 1.0C

Output Voltage V

OUT

2.499 2.500 2.501 V

T

A

C, E, M

PARAMETER SYMBOL MIN TYP MAX UNITS

Input Voltage Range V

IN

8 36 V

Sourcing: 0mA ≤ I

OUT

≤ 15mA

Sinking: -15mA ≤ I

OUT

≤ 0mA

MAX6325/MAX6341/MAX6350

1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V

Voltage References

_______________________________________________________________________________________ 3

(Note 4)

V4.095 4.096 4.097V

OUT

Output Voltage +25°C

20 ppmTemperature Hysteresis

C 0.5 1.0

MAX6341

Output Voltage Temperature
Coefficient (Note 1)

TCV

OUT

E 0.75 1.5

ppm/°C

+25°C

+25°C 10 18

MAX6341C_A
MAX6341E_A

CONDITIONS

30

ppm/

1000h

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

V8 36V

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—MAX6341

(VIN= 10V, I

OUT

= 0mA, TA= T

MIN

to T

MAX

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

M 1.0 2.5MAX6341MJA

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

ON

+25°C 8 µs

C 30
E 35
M 45

+25°C 2 5

10V ≤ VIN≤ 36V

C 7
E 8
M 10

Supply Current

C 1 6
E 1 7
M 3 9
C 1 6
E 1 7
M 7 18

+25°C

Sourcing: 0mA ≤ I

OUT

≤ 15mA

Sinking: -15mA ≤ I

OUT

≤ 0mA

∆V

OUT

/

∆I

OUT

Load Regulation (Note 2) ppm/mA

MAX6325/MAX6341/MAX6350

1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V
Voltage References

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX6350

(VIN= 10V, I

OUT

= 0mA, TA= T

MIN

to T

MAX

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

(Note 4)

V4.999 5.000 5.001V

OUT

Output Voltage +25°C

20 ppmTemperature Hysteresis

C 0.5 1.0

MAX6350

E 0.75 1.5

+25°C

+25°C 10 18

MAX6350C_A
MAX6350E_A

CONDITIONS

30

ppm/

1000h

8V ≤ VIN≤ 10V

Long-Term Stability ∆V

OUT

/ t +25°C

Line Regulation (Note 2)

∆V

OUT

/

∆V

IN

ppm/V

Figure 1
To ±0.01% of final value

V8 36V

IN

Input Voltage Range

+25°C 2.0 3.0

Supply Current I

IN

C, E, M 3.3

mA

Trim-Adjustment Range

UNITSMIN TYP MAXSYMBOLPARAMETER

∆V

OUT

C, E, M ±30 ±50 mV

10 µsTurn-On Settling Time t

on

+25°C

C, E, M

T

A

C 30

E 35

M 45

C 7

+25°C 2 5

E 8

10V ≤ VIN≤ 36V

M 10
C 1 6

C 1 6

E 1 7

E 1 7

M

M 2 9

6 15

0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz

3.0 µVp-p

Output Noise Voltage (Note 3) e

n

+25°C

2.5 5.0 µV

RMS

Output Voltage Temperature
Coefficient (Note 1)

TCV

OUT

ppm/°C

M 1.0 2.5MAX6350MJA

Note 1: Temperature coefficient is measured by the box method; i.e., the maximum ∆V

OUT

is divided by ∆T x V

OUT

.

Note 2: Line regulation (∆V

OUT

/ (V

OUT

x ∆

VIN

)) and load regulation (∆V

OUT

/ (V

OUT

x ∆I

OUT

)) are measured with pulses and do not

include output voltage changes due to die-temperature changes.

Note 3: Noise specifications are 100% tested for the 10Hz to 1kHz bandwidth. Production testing in the 0.1Hz to 10Hz bandwidth is

available upon request.

Note 4: Temperature hysteresis is specified at T

A

= +25°C by measuring V

OUT

before and after changing temperature by +25°C

using the plastic DIP package.

+25°C

Sourcing: 0mA ≤ I

OUT

≤ 15mA

Sinking: -15mA ≤ I

OUT

≤ 0mA

ppm/mA

∆V

OUT

/

∆I

OUT

Load Regulation (Note 2)