intersil X9015 DATA SHEET

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X9015

Low Noise, Low Power, Volatile

Data Sheet August 31, 2006

Single Digitally Controlled (XDCP™) Potentiometer

The Intersil X9015 is a 32 tap potentiometer that is volatile. The device consists of a string of 31 resistors that can be programmed to connect the R the nodes between the connecting resistors. The connection point of the wiper is determined by information communicated to the device on the 3-wire port. The 3-wire port changes the tap position by a falling edge on the increment pin. The direction the wiper moves is determined by the state of the up/down pin. The wiper positi on at power up is Tap #15.

The X9015 can be used in a wide variety of applications that require a digitally controlled variable resistor to set analog values.

wiper output with any of

W/VW

FN8157.5

Features

•32 taps

• Three-wire up/down serial interface

•VCC = 2.7V–5V

• Operating I

= 50µA max.

• Standby current = 1µA max.

•R

TOTAL

= 10kΩ, 50kΩ

• Packages 8 Ld SOIC, 8 Ld MSOP

• Pb-free plus anneal available (RoHS compliant)

Pinout

SOIC/MSOP

L/VL

RW/V

RH/V

INC U/D

1 2

X9015

3 4

Block Diagram

(Supply Voltage)

Up/Down

)

(U/D

Increment

(INC

Device Select

(CS

Control

)

(Ground)

General

H/VH

RW/V

RL/V

U/D INC

5-Bit

Up/Down

Counter

Control

Circuitry

One

Thirty

Two

Decoder

Detailed

Transfer

Gates

Resistor

Array

RH/V

RL/V RW/V

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Ordering Information

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X9015

TEMPERATURE

PART NUMBER PART MARKING VCC LIMITS (V) R

X9015WS8T1 X9015W 5 ±10% 10 0 to +70 8 Ld SOIC

X9015WS8ZT1 (Note) X9015W Z 0 to +70 8 Ld SOIC (Pb-free)

X9015UM8 ABB 50 0 to +70 8 Ld MSOP M8.118 X9015UM8Z (Note) DCF 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9015UM8I* ABD -40 to +85 8 Ld MSOP M8.118 X9015UM8IZ* (Note) DCD -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9015US8* X9015U 0 to +70 8 Ld SOIC M8.15 X9015US8Z* (Note) X9015U Z 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9015US8I* X9015U I -40 to +85 8 Ld SOIC M8.15 X9015US8IZ* (Note) X9015U Z I -40 to +85 8 Ld SOIC (Pb-free) M8.15 X9015WS8-2.7* X9015W F 2.7-5.5 10 0 to +70 8 Ld SOIC M8.15 X9015WS8Z-2.7* (Note) X9015W ZF 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9015UM8-2.7* ABC 50 0 to +70 8 Ld MSOP M8.118 X9015UM8Z-2.7* (Note) DCF 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9015UM8I-2.7* ABE -40 to +85 8 Ld MSOP M8.118 X9015UM8IZ-2.7* (Note) DCE -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9015US8-2.7* X9015U F 0 to +70 8 Ld SOIC M8.15 X9015US8Z-2.7* (Note) X9015U ZF 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9015US8I-2.7* X9015U G -40 to +85 8 Ld SOIC M8.15 X9015US8IZ-2.7* (Note) X9015U ZG -40 to +85 8 Ld SOIC (Pb-free) M8.15 * Add “T1” suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

TOTAL

(kΩ)

RANGE (°C) PACKAGE

Tape and Reel

PKG.

DWG. #

M8.15

FN8157.5

August 31, 2006

X9015

www.BDTIC.com/Intersil

Pin Descriptions

RH/VH and RL/V

The high (RH/VH) and low (RL/VL) terminals of the X9015 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum volt age is V maximum is V references the relative position of the terminal in relation to wiper movement direction selected by the U/D the voltage potential on the terminal.

RW/V

RW/Vw is the wiper terminal and is equivalent to the 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 is typically 200Ω at V

=5V. At power up the wiper position is at Tap #15.

=Tap #0).

L/RL

Up/Down (U/D)

The U/D input controls the direction of the wiper movement and whether the tap position is incremented or decremented.

Increment (INC)

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.

Chip Select (CS)

The device is selected when the CS input is LOW. When CS is returned HIGH while the INC will be placed in the low power standby mode until the device is selected once again.

and the

. The terminology of RL/VL and RH/VH

input, and not

input is also HIGH the X9015

Pin Names

SYMBOL DESCRIPTION

RH/V

RW/V

RL/V

U/D INC

H W L

High terminal Wiper terminal Low terminal Ground Supply voltage Up/Down control input Increment control input Chip select control input

The wiper, when at either fixed terminal, act s li ke it s mechanical equivalent and does not move beyond the last position. That is, the counter does not wrap around when clocked to either extreme.

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, multiple taps are connected to the wiper for t R significant amount if the wiper is moved several positi ons.

When the device is powered-down, the wiper position is lost. When power is restored, the wiper is set to Tap #15.

value for the device can temporarily be reduced by a

TOTAL

(INC to VW change). The

Instructions and Programming

The INC, U/D and CS inputs control the movement of the wiper along the resistor array. With CS selected and enabled to respond to the U/D HIGH to LOW transitions on INC (depending on the state of the U/D The output of this counter is decoded to select one of thirty two wiper positions along the resistive array.

The system may select the X9015, move the wiper and deselect the device. The new wiper position will be maintained until changed by the system or until a power-up/down cycle.

The state of U/D This allows the host system to enable the device and then move the wiper up and down until the proper trim is attained.

may be changed while CS remains LOW.

set LOW the device is

and INC inputs.

will increment or decrement

input) a five bit counter.

Mode Selection

CS INC U/D MODE

LH LL

HX HXX LLX

L H Wiper Up (not recommended)

Wiper up

Wiper down

Standby mode

Normal mode

Wiper Down (not recommended)

Principles Of Operation

There are two sections of the X9015: the input control, counter and decode section; 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 sin gle electronic switch connecting a point on the resistor array to the wiper output. The resistor array is comprised of 31 individual resistors connected in series.

FN8157.5

August 31, 2006

X9015

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Absolute Maximum Ratings Operating Conditions

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

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

Voltage on CS

V = |VH–VL| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V

Lead temperature (soldering 10s) . . . . . . . . . . . . . . . . . . . . .+300°C

(10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±7.5mA

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

)

Potentiometer Specifications Over recommended operating conditions unless otherwise stated

SYMBOL PARAMETER TEST CONDITIONS/NOTES MIN. TYP. MAX. UNIT

H/CL/CW

, INC, U/D, VH, VL and

with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . . -1V to +7V

TOTAL

End to End Resistance Variation –20 +20 % VH/RH Terminal Voltage 0 V VL/RL Terminal Voltage 0 V Power Rating R Wiper Resistance IW = 1mA, VCC = 5V 200 400 Ω Wiper Resistance IW = 1mA, VCC = 2.7V 400 1000 Ω Wiper Current -3.75 3.75 mA Noise Ref: 1kHz -120 dBV Resolution 3% Absolute Linearity (Note 1) V Relative Linearity (Note 2) V

Temperature Coefficient ±300 ppm/°C

TOTAL

Ratiometric Temperature Coefficient ±20 ppm/° C Potentiometer Capacitances See circuit #3 10/10/25 pF

TOTAL

w(n)(actual)–Vw(n)(expected) w(n+1)

≤1kΩ 10 mW

–[V

Temperature Range

Commercial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C

Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Supply Voltage (V

X9015. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ±10%

X9015-2.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V

] -0.2 +0.2 MI (Note 3)

w(n)+MI

)

CC CC

-1 +1 MI (Note 3)

V V

Power Up and Down Requirements

The are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potentiometer pins provided that V always in effect.

NOTES:

1. Absolute Linearity is utilized to determine actual wiper voltage versus expected voltage = (V

2. Relative Linearity is a measure of the error in step size between taps = V

3. 1 Ml = Minimum Increment = R

4. Typical values are for T

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

is always more positive than or equal to VH, VL, and VW, i.e., VCC ≥ VH, VL, VW. The VCC ramp rate spec is

(n+1)

– [V

+ Ml] = ±0.2 Ml.

w(n)

/31.

TOT

= +25°C and nominal supply voltage.

(actual)–V

w(n)

(expected)) = ±1 Ml Maximum.

w(n)

FN8157.5

August 31, 2006

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