intersil X9116 DATA SHEET

www.BDTIC.com/Intersil

X9116

Low Noise, Low Power, Low Cost

Data Sheet September 26, 2006

Digitally Controlled Potentiometer (XDCP™)

The Intersil X9116 is a digitally controlled nonvolatile potentiometer designed to be used in trimmer applications. The pot consists of 15 equal resistor segments that connect to the wiper pin through programmable CMOS switches. The tap position is programmed through a 3-wire up/down serial port. The last position of the wiper is stored in a nonvolatile memory location which is recalled at the time of pow er up of the device.

The wiper moves through sequential tap positions with inputs on the serial port. A falling edge on INC (bar) causes the tap position to increment one position up or down based on whether the U/D (bar) pin is held high or low.

The X9116 can be used in many applications requiring a variable resistance. In many cases it can replace a mechanical trimmer and offers many advantages such as temperature and time stability as well as the reliability of a solid state solution.

FN8160.2

Features

• Solid-state nonvolatile

• 16 wiper taps

• 3-wire up/down serial interface = 2.7V and 5V

•V

• Active current < 50µA max.

• Standby current < 1µA max.

TOTAL

= 10kΩ

•R

• Packages: 8LdMSOP, 8LdSOIC

• Pb-free plus anneal available (RoHS compliant)

Pinout

SOIC/MSOP

INC

U/D

VH/R

X9116

VL/R

VW/R

Block Diagram

Up/Down

(U/D

)

Increment

(INC

)

Device Select

(CS)

(Supply Voltage)

Control

and

Memory

(Ground)

General

H/VH

RW/V

RL/V

RW-RL Resistance

10kΩ

9.34kΩ

8.68kΩ * kΩ

2.08kΩ

1.42kΩ

760Ω 100Ω

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

1-888-INTERSIL or1-888-468-3774

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

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

Ordering Information

www.BDTIC.com/Intersil

X9116

PART NUMBER

(BRAND) PART MARKING

X9116WM8T1 AAZ 5V ±10% 10 0 to +70 8 Ld MSOP Tape and Reel M8.118 X9116WM8ZT1 (Note) AKY 0 to +70 8 Ld MSOP (Pb-free)

X9116WM8I* AFL -40 to +85 8 Ld MSOP M8.118 X9116WM8IZ* (Note) DCG -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9116WS8* X9116W 0 to +70 8 Ld SOIC M8.15 X9116WS8Z* (Note) X9116W Z 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9116WS8I* X9116W I -40 to +85 8 Ld SOIC M8.15 X9116WS8IZ* (Note) X9116W ZI -40 to +85 8 Ld SOIC (Pb-free) M8.15 X9116WM8-2.7** AFK -2.7-5.5 0 to +70 8 Ld MSOP M8.118 X9116WM8Z-2.7* (Note) AOJ 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9116WM8I-2.7* ABA -40 to +85 8 Ld MSOP M8.118 X9116WM8IZ-2.7* (Note) AKS -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9116WS8-2.7* X9116W F 0 to +70 8 Ld SOIC M8.15 X9116WS8Z-2.7* (Note) X9116W ZF 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9116WS8I-2.7* X9116W G -40 to +85 8 Ld SOIC M8.15 X9116WS8IZ-2.7* (Note) X9116W ZG -40 to +85 8 Ld SOIC (Pb-free) M8.15

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.

*Add "T1" suffix for tape and reel. **Add “T2” suffix for tape and reel.

VCC LIMITS

(V)

TOTAL

(kΩ)

TEMP. RANGE

(°C) PACKAGE

M8.118

Tape and Reel

PKG.

DWG. #

Pin Descriptions

VH /RH and VL /RL

The high (VH/RH) and low (VL/RL) terminals of the X9116 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is V maximum is V

VW/R

Rw/Rw 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 to 400Ω depending upon V

Up/Down (U/D)

The U/D input controls the direction of the wiper movement and whether the counter is incremented (up) or decremented (down).

Increment (INC)

The INC input is negative-edge triggered. Toggl ing 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.

and the

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 X9116 will be placed in the low power standby mode until the device is selected once again.

Pin Descriptions

SYMBOL DESCRIPTION

VH/R

VW/R

VL/R

U/D INC

H W L

High Terminal Wiper Terminal Low Terminal Ground Supply Voltage Up/Down Control Input Increment Control Input Chip Select Input

FN8160.2

September 26, 2006

X9116

www.BDTIC.com/Intersil

Principles of Operation

There are three sections of the X9116: 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 15 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 pin.

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 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 a significant amount if the wiper is moved several positions.

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.

value for the device can temporarily be reduced by

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 is selected and enabled to respond to the U/D inputs. HIGH to LOW transitions on INC decrement (depending on the state of the U/D bit counter. The output of this counter is decoded to select one of 16 wiper positions along the resistive array.

set LOW, the device

and INC

will increment or

input) a four

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 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.

Mode Selection

CS INC U/D MODE

L H Wiper Up L L Wiper Down

H X Store Wiper Position

H X X Standby Current

L X No Store, Return to Standby

Symbol Table

WAVEFORM INPUTS OUTPUTS

Must be steady

May change from Low to High

May change from High to Low

Don’t Care: Changes Allowed

N/A Center Line

Will be steady

Will change from Low to High

Will change from High to Low

Changing: State Not Known

is High Impedance

The value of the counter is stored in nonvolatile memory whenever CS HIGH.

The system may select the X9116, 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 HIGH. The new wiper position will be maintained until changed by the system or until a power-up/down cycle recalls the previously stored data.

transitions HIGH while the INC input is also

LOW while taking CS

FN8160.2

September 26, 2006

+ 6 hidden pages