2024年4月16日发(作者：苹果6s刚上市多少钱)

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19-1896; Rev 0; 1/01

256-Tap, µPoT, Low-Drift,

Digital Potentiometer

General DescriptionFeatures

The MAX5402 µPoT

™

digital potentiometer is a 256-tap

variable resistor with 10kΩtotal resistance in a tiny 8-

oSmall Footprint, 8-Pin µMAX Package

pin µMAX package. This device functions as a mechan-

oUltra-Low 100nA Supply Current

ical potentiometer, consisting of a fixed resistor string

with a digitally controlled wiper contact. It operates

o+2.7V to +5.5V Single-Supply Operation

from +2.7V to +5.5V single-supply voltages and uses

o256 Tap Positions

an ultra-low 0.1µA supply current. This device also pro-

vides glitchless switching between resistor taps, as well

oLow Ratiometric Temperature Coefficient

as a convenient power-on reset (POR) that sets the

5ppm/°C

wiper to the midscale position at power-up. A low

oLow End-to-End Resistor Temperature Coefficient

5ppm/°C ratiometric temperature coefficient makes it

ideal for applications requiring low drift.

35ppm/°C

The MAX5402 serves well in applications requiring digi-

oPower-On Reset: Wiper Goes to Midscale

tally controlled resistors, including adjustable voltage

(Position 128)

references and programmable gain amplifiers (PGAs).

oGlitchless Switching Between the Resistor Taps

A nominal end-to-end resistor temperature coefficient of

35ppm/°C makes this part suitable for use as a variable

o3-Wire SPI™-Interface Compatible

resistor in applications such as low-tempco adjustable

o10kΩResistor Value

gain and other circuit configurations. This device is

guaranteed over the extended industrial temperature

range (-40°C to +85°C).

________________________Applications

Ordering Information

Mechanical Potentiometer Replacement

Low-Drift PGAs

PART

-

RANGEPACKAGE

R (kΩ)

Adjustable Voltage References

MAX5402EUA-40°C to +85°C8 µMAX10

µPoT is a trademark of Maxim Integrated Products.

SPI is a trademark of Motorola, Inc.

Functional Diagram

Pin Configuration

V

DD

TOP VIEW

H

R

8

R

8-BIT

8

256

8-BIT

LATCH

DECODE

W

L18H

SHIFT

DIN

REGISTER

L

GND27W

MAX5402

CS36V

DD

MAX5402

SCLK

DIN45SCLK

CLOCK

POR

CS

LOGIC

µMAX

GND

________________________________________________________________Maxim Integrated Products1

For price, delivery, and to place orders,please contact Maxim Distributionat 1-888-629-4642,

or visit Maxim’s website at .

MAX5402

元器件交易网

256-Tap, µPoT, Low-Drift,

Digital Potentiometer

M

A

X

5

4

0

2

ABSOLUTE MAXIMUM RATINGS

V

DD

-0.3V to +6V

DIN, SCLK, .-0.3V to +6V

H, L, W -0.3V to (V

DD

+ 0.3)

Maximum Continuous Current into Pins H, L, and W ...........1mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin µMAX (derate 4.1mW/°C above +70°C)............330mW

Operating -40°C to +85°C

+150°C

Storage -65°C to +150°C

Lead Temperature (soldering, 10s).................................+300°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.

ELECTRICAL CHARACTERISTICS

(V

DD

= +5V, V

H

= V

DD

, V

L

= 0, T

A

= T

MIN

to T

MAX

. Typical values are at V

DD

= +5V, T

A

= +25°C, unless otherwise noted.)

PARAMETER

Resolution

Integral Nonlinearity (Notes 1, 2)

Differential Nonlinearity

(Notes 1, 2)

End-to-End Resistor Tempco

Ratiometric Resistor Tempco

Full-Scale Error

Zero-Scale Error

DC PERFORMANCE (Variable-Resistor Mode)

Resolution

Integral Nonlinearity

(Notes 1, 3)

Differential Nonlinearity

(Notes 1, 3)

N

INL

DNL

V

DD

= +5V

V

DD

= +3V

V

DD

= +5V

V

DD

= +3V

V

DD

= +5V

V

DD

= +3V

46

7.5

0.7

✕

V

DD

0.3

✕

V

DD

±1.0

5

t

S

t

CP

t

CH

To 50% of fi nal val ue fr om cod e 0 to cod e 128

100

40

100

1012.5

275

550

8

±1

±3

±1/2

±1/2

Bits

LSB

LSB

LSB

LSB

SYMBOL

N

INL

DNL

TC

R

35

5

-6

+6

CONDITIONSMIN

8

±1/2

±1

TYPMAXUNITS

Bits

LSB

LSB

ppm/°C

ppm/°C

LSB

LSB

DC PERFORMANCE (Voltage-Divider Mode)

DC PERFORMANCE (Resistor Characteristics)

Wiper Resistance (Note 4)

Wiper Capacitance

End-to-End Resistance

DIGITAL INPUTS

Input High Voltage

Input Low Voltage

Input Leakage Current

Input Capacitance

TIMING CHARACTERISTICS (ANALOG)

Wiper-Settling Time

SCLK Clock Period

SCLK Pulse Width High

ns

ns

ns

TIMING CHARACTERISTICS (DIGITAL) (Note 5) (Figure 2)

V

IH

V

IL

V

V

µA

pF

R

W

C

W

R

HL

Ω

pF

kΩ

2_______________________________________________________________________________________