X9313WP-3应用文章市场行情现货热卖使用介绍供应商报价-中国IC网-芯三七

APPLICATION NOTE

A V A I L A B L E

AN20 • AN42–53 • AN71 • AN73 • AN88 • AN91–92 • AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135

Terminal Voltages ±5V, 32 Taps

X9313

Digitally Controlled Potentiometer (XDCP^™)

FEATURES

DESCRIPTION

• Solid-state potentiometer

• 3-wire serial interface

• 32 wiper tap points

—Wiper position stored in nonvolatile memory

and recalled on power-up

The Xicor X9313 is a digitally controlled potentiometer

(XDCP). The device consists of a resistor array, wiper

switches, a control section, and nonvolatile memory.

The wiper position is controlled by a 3-wire interface.

The potentiometer is implemented by a resistor array

composed of 31 resistive elements and a wiper

switching network. Between each element and at

either end are tap points accessible to the wiper

terminal. The position of the wiper element is

controlled by the CS, U/D, and INC inputs. The

position of the wiper can be stored in nonvolatile

memory and then be recalled upon a subsequent

power-up operation.

• 31 resistive elements

—Temperature compensated

—End to end resistance range ± 20%

—Terminal voltages, –5V to +5V

• Low power CMOS

—V = 3V or 5V

CC

—Active current, 3mA max.

—Standby current, 500µA max.

• High reliability

—Endurance, 100,000 data changes per bit

—Register data retention, 100 years

The device can be used as a three-terminal

potentiometer or as a two-terminal variable resistor in

a wide variety of applications including:

• R

values = 1KΩ, 10KΩ, 50KΩ, 100KΩ

TOTAL

• Packages

—8-lead SOIC, MSOP and DIP

– control

– parameter adjustments

– signal processing

BLOCK DIAGRAMS

5-Bit

U/D

INC

CS

R /V

31

H

Up/Down

Counter

V

(Supply Voltage)

CC

30

29

28

R /V

Up/Down

(U/D)

H

5-Bit

Nonvolatile

Memory

One

of

Thirty

Two

Control

Increment

(INC)

R

/V

W

and

W

Memory

Transfer

Gates

Resistor

Array

Device Select

(CS)

Decoder

R /V

L

2

Store and

Recall

Control

Circuitry

V

(Ground)

SS

1

0

V

CC

SS

General

R /V

L

R

/V

W

Detailed

Characteristics subject to change without notice. 1 of 10

REV 1.1 10/23/00

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This Material Copyrighted by Its Respective Manufacturer

X9313

PIN DESCRIPTIONS

PIN CONFIGURATION

R /V and R /V

H

L

H

L

8-Lead DIP/SOIC

The high (R /V ) and low (R /V ) terminals of the

H

L

H

L

INC

U/D

1

2

3

4

8

7

6

5

V

CC

X9313 are equivalent to the ﬁxed terminals of a

mechanical potentiometer. The minimum voltage is

CS

X9313

V

and the maximum is V . The terminology of R /

CC

L

R /V

L

SS

R /V

L

H

V

H

V and R /V references the relative position of the

L

H

R

/V

W

SS

W

terminal in relation to wiper movement direction

selected by the U/D input and not the voltage potential

on the terminal.

8-Lead MSOP

R /V

H

R_W/V_W

U/D

INC

1

2

3

4

8

V

SS

R /V is the wiper terminal and is equivalent to the

7

X9313

6

W

w

R

/V

W

movable terminal of a mechanical potentiometer. The

position of the wiper within the array is determined by

the control inputs. The wiper terminal series resistance

W

V

CC

R /V

L

CS

5

is typically 40Ω at V = 5V.

CC

PIN NAMES

Up/Down (U/D)

Symbol

Description

The U/D input controls the direction of the wiper

movement and whether the counter is incremented or

decremented.

R /V

High terminal

Wiper terminal

Low terminal

Ground

H

W

L

R /V

W

Increment (INC)

R /V

L

The INC input is negative-edge triggered. Toggling

INC will move the wiper and either increment or

decrement the counter in the direction indicated by the

logic level on the U/D input.

V

SS

CC

V

Supply voltage

U/D

INC

CS

Up/Down control input

Increment control input

Chip Select control input

Chip Select (CS)

The device is selected when the CS input is LOW. The

current counter value is stored in nonvolatile memory

when CS is returned HIGH while the INC input is also

HIGH. After the store operation is complete the X9313

will be placed in the low power standby mode until the

device is selected once again.

Characteristics subject to change without notice. 2 of 10

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X9313

PRINCIPLES OF OPERATION

The system may select the X9313, move the wiper

and deselect the device without having to store the

latest wiper position in nonvolatile memory. After the

wiper movement is performed as described above and

once the new position is reached, the system must

keep INC LOW while taking CS HIGH. The new wiper

position will be maintained until changed by the

system or until a power-up/down cycle recalled the

previously stored data.

There are three sections of the X9313: the input

control, counter and decode section; the nonvolatile

memory; and the resistor array. The input control

section operates just like an up/down counter. The

output of this counter is decoded to turn on a single

electronic switch connecting a point on the resistor

array to the wiper output. Under the proper conditions

the contents of the counter can be stored in nonvolatile

memory and retained for future use. The resistor array

is comprised of 31 individual resistors connected in

series. At either end of the array and between each

resistor is an electronic switch that transfers the

potential at that point to the wiper.

This procedure allows the system to always power-up

to a preset value stored in nonvolatile memory; then

during system operation minor adjustments could be

made. The adjustments might be based on user

preference, system parameter changes due to

temperature drift, etc...

The wiper, when at either ﬁxed terminal, acts like its

mechanical equivalent and does not move beyond the

last position. That is, the counter does not wrap

around when clocked to either extreme.

The state of U/D may be changed while CS remains

LOW. This allows the host system to enable the device

and then move the wiper up and down until the proper

trim is attained.

The electronic switches on the device operate in a

“make before break” mode when the wiper changes

tap positions. If the wiper is moved several positions,

MODE SELECTION

multiple taps are connected to the wiper for t (INC to

CS

L

INC

U/D

H

Mode

IW

V

change). The R

value for the device can

W

TOTAL

Wiper Up

temporarily be reduced by a signiﬁcant amount if the

wiper is moved several positions.

L

Wiper Down

H

X

L

X

Store Wiper Position

Standby Current

When the device is powered-down, the last wiper

position stored will be maintained in the nonvolatile

memory. When power is restored, the contents of the

memory are recalled and the wiper is set to the value

last stored.

H

X

No Store, Return to Standby

SYMBOL TABLE

INSTRUCTIONS AND PROGRAMMING

WAVEFORM

INPUTS

OUTPUTS

The INC, U/D and CS inputs control the movement of

the wiper along the resistor array. With CS set LOW

the device is selected and enabled to respond to the

U/D and INC inputs. HIGH to LOW transitions on INC

will increment or decrement (depending on the state of

the U/D input) a seven bit counter. The output of this

counter is decoded to select one of thirty two wiper

positions along the resistive array.

Must be

steady

Will be

steady

May change

from Low to

High

Will change

from Low to

High

May change

from High to

Low

Will change

from High to

Low

Don’t Care:

Changes

Allowed

Changing:

State Not

Known

The value of the counter is stored in nonvolatile

memory whenever CS transitions HIGH while the INC

input is also HIGH.

N/A

Center Line

is High

Impedance

Characteristics subject to change without notice. 3 of 10

REV 1.1 10/23/00

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This Material Copyrighted by Its Respective Manufacturer

X9313

ABSOLUTE MAXIMUM RATINGS

COMMENT

Temperature under bias ....................–65°C to +135°C

Storage temperature .........................–65°C to +150°C

Stresses above those listed under “Absolute Maximum

Ratings” may cause permanent damage to the device.

This is a stress rating only; functional operation of the

device (at these or any other conditions above those

listed in the operational sections of this speciﬁcation)

is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device

reliability.

Voltage on CS, INC, U/D, V , V and

H

L

V

with respect to V .........................–1V to +7V

CC

SS

∆V = |V –V |

H

L

X9313Z ................................................................... 4V

X9313W, X9313U, X9313T ................................... 10V

Lead temperature (soldering 10 seconds)..........300°C

I

(10 seconds) .............................................. ±8.8mA

W

RECOMMENDED OPERATING CONDITIONS

Temperature

Commercial

Industrial

Min.

0°C

Max.

+70°C

+85°C

Supply Voltage (V

X9313

)

Limits

5V ±10%

3V to 5.5V

CC

–40°C

X9313-3

POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)

Limits

Symbol

Parameter

Min.

Typ.

Max.

±20

+5V

10

Unit

%

Test Conditions/Notes

End to end resistance tolerance

V

V terminal voltage

–5V

V

VH

H

V

V terminal voltage

L

V

VL

Power rating

Wiper resistance

Wiper current

Noise

mW

Ω

R

≥ 10 KΩ

= 1 KΩ

TOTAL

16

TOTAL

R

40

100

±4.4

I

= 1mA, V = 5V

W

W CC

I

mA

W

-120

3

dBV

%

Ref: 1kHz

R –R

Resolution

Absolute linearity⁽¹⁾

Relative linearity⁽²⁾

±1

MI⁽³⁾

ppm/°C

pF;

w(n)(actual) w(n)(expected)

±0.2

R

–[R

]

w(n+1)

w(n)+MI

R

temperature coefficient

±300

TOTAL

Ratiometric temperature coefficient

Potentiometer capacitances

±20

C /C /C

W

10/10/25

See Circuit #3

H

L

Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (V

(actual)–V

(expected)) = ±1 Ml

w(n)

Maximum.

(2) Relative linearity is a measure of the error in step size between taps = R

–[R

+ Ml] = ±0.2 Ml.

w(n)

W(n+1)

(3) 1 Ml = Minimum Increment = R

/31.

TOT

Characteristics subject to change without notice. 4 of 10

REV 1.1 10/23/00

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This Material Copyrighted by Its Respective Manufacturer

X9313

D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)

Limits

(4)

Symbol

Parameter

active current

Min. Typ.

Max.

Unit

Test Conditions

I

V

CC

1

3

mA

CS = V , U/D = V or V and

CC

IL

IH

INC = 0.4V/2.4V @ max. t

CYC

I

Standby supply current

200

500

±10

µA

CS = V – 0.3V, U/D and

CC

SB

INC = V or V – 0.3V

SS

CC

I

CS, INC, U/D input leakage current

CS, INC, U/D input HIGH voltage

CS, INC, U/D input LOW voltage

CS, INC, U/D input capacitance

µA

V

= V to V

SS

LI

IN

CC

V

2

V

+ 1

CC

IH

V

–1

0.8

10

V

IL

(5)

C

pF

V

= 5V, V = V , T = 25°C,

CC IN SS A

IN

f = 1MHz

ENDURANCE AND DATA RETENTION

Parameter

Minimum endurance

Data retention

Min.

100,000

100

Unit

Data changes per bit per register

Years

Notes: (4) Typical values are for T = 25°C and nominal supply voltage.

A

(5) This parameter is periodically sampled and not 100% tested.

Test Circuit #1

Test Circuit #2

Circuit #3 SPICE Macro Model

R

V /R

H

TOTAL

H

V /R

H

R

L

H

Test Point

C

L

C

W

C

H

10pF

V

S

Test Point

/R

V

/R

Force

Current

VW

W

25pF

V

W

10pF

V /R

L

V /R

R

L

W

A.C. CONDITIONS OF TEST

A.C. OPERATING CHARACTERISTICS (Over recom-

mended operating conditions unless otherwise speci-

fied)

Input pulse levels

0V to 3V

10ns

Input rise and fall times

Input reference levels

1.5V

Characteristics subject to change without notice. 5 of 10

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X9313

Limits

(6)

Symbol

Parameter

Min.

100

2.9

1

Typ.

Max.

Unit

ns

t

CS to INC setup

Cl

lD

DI

INC HIGH to U/D change

U/D to INC setup

ns

t

µs

t

INC LOW period

µs

lL

lH

lC

t

INC HIGH period

1

µs

INC Inactive to CS inactive

CS deselect time (STORE)

CS deselect time (NO STORE)

INC to Vw change

1

µs

t

20

ms

ns

CPH

100

CPH

t

1

5

µs

IW

t

INC cycle time

4

µs

CYC

(7)

t

INC input rise and fall time

Power up to wiper stable

500

5

µs

,

R

F

(7)

t

PU

µs

(7)

t V

V

CC

power-up rate

0.2

50

10

V/ms

ms

R

CC

t

Store cycle

WR

POWER UP AND DOWN REQUIREMENTS

There are no restrictions on the sequencing of V

and the voltages applied to the potentiometer pins during

CC

power-up or power-down conditions. During power-up, the data sheet parameters for the DCP do not fully apply

until 1 millisecond after V reaches is ﬁnal value.The V ramp spec is always in effect.

CC

A.C. TIMING

CS

t

CYC

t

CPH

CI

IL

IH

IC

90% 90%

10%

INC

U/D

t

R

ID

DI

F

t

IW

(8)

MI

V

W

Notes: (6) Typical values are for T = 25°C and nominal supply voltage.

A

(7) This parameter is not 100% tested.

(8) MI in the A.C. timing diagram refers to the minimum incremental change in the V output due to a change in the wiper position.

W

Characteristics subject to change without notice. 6 of 10

REV 1.1 10/23/00

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X9313

APPLICATIONS INFORMATION

Electronic digitally controlled (XDCP) potentiometers provide three powerful application advantages; (1) the

variability and reliability of a solid-state potentiometer, (2) the ﬂexibility of computer-based digital controls, and (3)

the retentivity of nonvolatile memory used for the storage of multiple potentiometer settings or data.

Basic Configurations of Electronic Potentiometers

V

R

V

R

V

H

V

/R

W

L

I

Three terminal potentiometer;

variable voltage divider

Two terminal variable resistor;

variable current

Basic Circuits

Noninverting Amplifier

Buffered Reference Voltage

Cascading Techniques

R

+5V

1

+V

LM308A

+V

V

+

–

S

+5V

V

O

V

OP-07

W

+

–

V

REF

–5V

X

V

OUT

V

/R

W

R

2

+V

–5V

= V /R

R

1

V

W

OUT

W

(a)

(b)

V

= (1+R /R )V

2 1 S

O

Voltage Regulator

Offset Voltage Adjustment

Comparator with Hysteresis

R

2

1

V

V (REG)

O

317

IN

LT311A

V

S

V

–

+

S

V

O

R

1

100KΩ

–

+

V

O

I

adj

TL072

R

2

10KΩ

+12V

R

1

2

V

= {R /(R +R )} V (max)

1 1 2 O

UL

LL

10KΩ

-12V

= {R /(R +R )} V (min)

1 1 2 O

V

(REG) = 1.25V (1+R /R )+I

R

adj 2

O

2

1

(for additional circuits see AN115)

Characteristics subject to change without notice. 7 of 10

REV 1.1 10/23/00

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X9313

PACKAGING INFORMATION

8-Lead Miniature Small Outline Gull Wing Package Type M

0.118 ± 0.002

(3.00 ± 0.05)

0.012 + 0.006 / -0.002

(0.30 + 0.15 / -0.05)

0.0256 (0.65) Typ.

R 0.014 (0.36)

0.118 ± 0.002

(3.00 ± 0.05)

0.030 (0.76)

0.0216 (0.55)

7° Typ.

0.036 (0.91)

0.032 (0.81)

0.040 ± 0.002

(1.02 ± 0.05)

0.008 (0.20)

0.004 (0.10)

0.0256" Typical

0.025"

Typical

0.150 (3.81)

0.007 (0.18)

0.005 (0.13)

Ref.

0.193 (4.90)

Ref.

0.220"

0.020"

Typical

8 Places

FOOTPRINT

NOTE:

1. ALL DIMENSIONS IN INCHES AND (MILLIMETERS)

Characteristics subject to change without notice. 8 of 10

REV 1.1 10/23/00

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X9313

PACKAGING INFORMATION

8-Lead Plastic Small Outline Gull Wing Package Type S

0.150 (3.80) 0.228 (5.80)

0.158 (4.00) 0.244 (6.20)

Pin 1 Index

Pin 1

0.014 (0.35)

0.019 (0.49)

0.188 (4.78)

0.197 (5.00)

(4X) 7°

0.053 (1.35)

0.069 (1.75)

0.004 (0.19)

0.010 (0.25)

0.050 (1.27)

0.010 (0.25)

0.050"Typical

X 45°

0.020 (0.50)

0.050"

Typical

0° - 8°

0.0075 (0.19)

0.010 (0.25)

0.250"

0.016 (0.410)

0.037 (0.937)

0.030"

Typical

8 Places

FOOTPRINT

NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)

Characteristics subject to change without notice. 9 of 10

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X9313

ORDERING INFORMATION

X9313X

X

V

Limits

CC

Blank = 4.5V to 5.5V

3 = 3V to 5.5V

Temperature Range

Blank = Commercial = 0°C to +70°C

I = Industrial = –40°C to +85°C

Package

M = 8-Lead MSOP

P = 8-Lead Plastic DIP

S = 8-Lead SOIC

End to End Resistance

Z =

W =

U =

T =

1KΩ

10KΩ

50KΩ

100KΩ

Physical Characteristics

Marking Includes

Manufacturer’s Trademark

Resistance Value or Code

Date Code

LIMITED WARRANTY

Devices sold by Xicor, Inc. are covered by the warranty and patent indemniﬁcation provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty,

express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement.

Xicor, Inc. makes no warranty of merchantability or ﬁtness for any purpose. Xicor, Inc. reserves the right to discontinue production and change speciﬁcations and prices

at any time and without notice.

Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, or licenses are implied.

TRADEMARK DISCLAIMER:

Xicor and the Xicor logo are registered trademarks of Xicor, Inc. AutoStore, Direct Write, Block Lock, SerialFlash, MPS, and XDCP are also trademarks of Xicor, Inc. All

others belong to their respective owners.

U.S. PATENTS

Xicor products are covered by one or more of the following U.S. Patents: 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846;

4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967; 4,883,976; 4,980,859; 5,012,132; 5,003,197; 5,023,694; 5,084,667; 5,153,880; 5,153,691;

5,161,137; 5,219,774; 5,270,927; 5,324,676; 5,434,396; 5,544,103; 5,587,573; 5,835,409; 5,977,585. Foreign patents and additional patents pending.

LIFE RELATED POLICY

In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection

and correction, redundancy and back-up features to prevent such an occurrence.

Xicor’s products are not authorized for use in critical components in life support devices or systems.

1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to

perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a signiﬁcant injury to the user.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life

support device or system, or to affect its safety or effectiveness.

Characteristics subject to change without notice. 10 of 10

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