intersil ISL22414 DATA SHEET

ISL22414

Single Digitally Controlled Potentiometer (XDCP™)

Data Sheet July 17, 2007

Low Noise, Low Power, SPI® Bus, 256 Taps

The ISL22414 integrates a single digitally controlled potentiometer (DCP), control logic and non-volatile memory on a monolithic CMOS integrated circuit.

The digitally controlled potentiometer is implemented with a combination of resistor elements and CMOS switches. The position of the wiper is controlled by the user through the SPI serial interface. The potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR control the position of the wiper. At power-up the device recalls the contents of the DCP’s IVR to the WR.

The ISL22414 also has 14 General Purpose non-volatile registers that can be used as storage of lookup table for multiple wiper position or any other valuable information.

The ISL22414 features a dual supply, that is beneficial for applications requiring a bipolar range for DCP terminals between V- and VCC.

The DCP can be used as three-terminal potentiometer or as two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.

Pinout

ISL22414

(10 LD MSOP)

TOP VIEW

SDO

SDI

1 2 3 4

V-

VccSCK RH

8 7

RL GND

FN6424.0

Features

• 256 resistor taps

• SPI serial interface with write/read capability

• Daisy Chain Configuration

• Shutdown mode

• Non-volatile EEPROM storage of wiper position

• 14 General Purpose non-volatile registers

• High reliability

- Endurance: 1,000,000 data changes per bit per register

- Register data retention: 50 years @ T ≤ +55°C

• Wiper resistance: 70Ω typical @ 1mA

• Standby current <2.5µA max

• Shutdown current <2.5µA max

• Dual power supply

- VCC = 2.25V to 5.5V

- V- = -2.25V to -5.5V

•10kΩ, 50kΩ or 100kΩ total resistance

• Extended industrial temperature range: -40 to +125°C

• 10 Lead MSOP

• Pb-free plus anneal product (RoHS compliant)

Ordering Information

PART

NUMBER

(NOTES 1, 2)

ISL22414TFU10Z 414TZ 100 -40 to +125 10 Ld MSOP M10.118 ISL22414UFU10Z 414UZ 50 -40 to +125 10 Ld MSOP M10.118 ISL22414WFU10Z 414WZ 10 -40 to +125 10 Ld MSOP M10.118

NOTES:

1. 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.

2. Add “-TK” suffix for 1,000 Tape and Reel option

PART

MARKING

1-888-INTERSIL or 1-888-468-3774

RESISTANCE

OPTION

(kΩ)

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

| Intersil (and design) and XDCP are registered trademarks of Intersil Americas Inc.

TEMP.

RANGE

(°C)

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

PACKAGE

(Pb-Free)

PKG.

DWG. #

Block Diagram

ISL22414

VCC

SCK SDO

SDI

SPI

INTERFACE

POWER UP INTERFACE, CONTROL AND STATUS LOGIC

NON-VOLATILE

REGISTERS

GND

WR VOLATILE REGISTER AND WIPER

CONTROL

CIRCUITRY

Pin Descriptions

MSOP PIN SYMBOL DESCRIPTION

1 SCK SPI interface clock input 2 SDO Data Output of the SPI serial interface 3 SDI Data Input of the SPI serial interface 4CS 5 V- Negative power supply pin 6 GND Device ground pin 7 RL “Low” terminal of DCP 8 RW “Wiper” terminal of DCP 9 RH “High” terminal of DCP

10 VCC Power supply pin

Chip Select active low input

V-

RL RW

FN6424.0

July 17, 2007

ISL22414

Absolute Maximum Ratings Thermal Information

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

Voltage at any Digital Interface Pin

with Respect to GND . . . . . . . . . . . . . . . . . . . . . -0.3V to V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +6V

V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-6V to 0.3V

Voltage at any DCP pin with Respect to GND. . . . . . . . . . V- to V

+0.3

IW (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA

Latchup . . . . . . . . . . . . . . . . . . . . . . . . . Class II, Level A @ +125°C

ESD

Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV

Machine Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400V

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.

NOTES:

is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

3. θ

Analog Specifications Over recommended operating conditions unless otherwise stated. Limits are established by characterization.

Thermal Resistance (Typical, Note 3) θ

(°C/W)

10 Lead MSOP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Maximum Junction Temperature (Plastic Package). . . . . . . .+150°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

Recommended Operating Conditions

Temperature Range (Full Industrial) . . . . . . . . . . . .-40°C to +125°C

Power Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15mW

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.25V to 5.5V

V-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-2.25V to -5.5V

Max Wiper Current Iw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±3.0mA

SYMBOL PARAMETER TEST CONDITIONS

TOTAL

RH to RL resistance W option 10 kΩ

U option 50 kΩ

T option 100 kΩ RH to RL resistance tolerance -20 +20 % End-to-End Temperature

Coefficient

, V

H/CL/CW

(Note 18)

LkgDCP

DCP terminal voltage VRH and VRL to GND V- V

Wiper resistance RH - floating, VRL = V-, force Iw current to the

Potentiometer capacitance

Leakage on DCP pins

VOLTAGE DIVIDER MODE (V- @ RL; V

INL

(Note 9)

Integral non-linearity Monotonic over all tap positions

@ RH; measured at RW, unloaded)

W option ±150 ppm/°C

U, T option ±50 ppm/°C

wiper, I

= (VCC - VRL)/R

See Macro Model below. 10/10/25 pF

Voltage at pin from V- to V

W option -1.5 ±0.5 1.5 LSB

U, T option -1.0 ±0.2 1.0 LSB

DNL

(Note 8)

Differential non-linearity Monotonic over all tap positions

W option -1.0 ±0.4 1.0 LSB

U, T option -0.5 ±0.15 0.5 LSB

ZSerror (Note 6)

FSerror (Note 7)

(Notes 10, 18)

cutoff

(Note 18)

Zero-scale error W option 0 1 5 LSB

U, T option 0 0.5 2 Full-scale error W option -5 -1 0 LSB

U, T option -2 -1 0 Ratiometric temperature coefficient DCP register set to 80 hex ±4 ppm/°C

-3dB cut off frequency Wiper at midpoint (80hex) W option (10k) 1000 kHz

Wiper at midpoint (80hex) U option (50k) 250 kHz

Wiper at midpoint (80hex) T option (100k) 120 kHz

TOTAL

MIN

(Note 19)

TYP

(Note 4)

MAX

(Note 19) UNIT

70 250 Ω

-1 0.1 1 µA

(Note 5)

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July 17, 2007

ISL22414

Analog Specifications Over recommended operating conditions unless otherwise stated. Limits are established by characterization.

(Continued)

MIN

SYMBOL PARAMETER TEST CONDITIONS

(Note 19)

RESISTOR MODE (Measurements between RW and RL with RH not connected, or between RW and RH with RL not connected)

RINL

Integral non-linearity W option -3 ±1.5 3 MI

(Note 14)

U, T option -1 ±0.3 1 MI

RDNL

Differential non-linearity W option -1.5 ±0.4 1.5 MI

(Note 13)

U, T option -0.5 ±0.15 0.5 MI

Roffset

Offset W option 0 1 5 MI

(Note 12)

U, T option 0 0.5 2 MI

(Notes 15, 18)

Resistance temperature coefficient DCP register set between 32 hex and FF hex ±50 ppm/°C

Operating Specifications Over the recommended operating conditions unless otherwise specified. Limits are established by

characterization.

MIN

SYMBOL PARAMETER TEST CONDITIONS

CC1

VCC Supply Current (volatile write/read)

V- Supply Current

V-1

(volatile write/read)

= 5.5V, V- = 5.5V, f

= 5MHz; (for SPI

SCK

Active, Read and Volatile Write states only) V

= 2.25V , V- = -2.25V , f

Active, Read and Volatile Write states only) V- = -5.5V, V

Active, Read and Volatile Write states only) V- = -2.25V , V

= 5.5V, f

= 2.25V , f

= 5MHz; (for SPI

SCK

= 5MHz; (for SPI

SCK

= 5MHz; (for SPI

SCK

Active, Read and Volatile Write states only)

CC2

VCC Supply Current (non-volatile write/read)

V- Supply Current

V-2

(non-volatile write/read) V- Supply Current

(non-volatile write/read) VCC Current (standby) V

= 5.5V, V- = 5.5V, f

Active, Read and Non-volatile Write states only) V

= 2.25V , V- = -2.25V , f

Active, Read and Non-volatile Write states only) V- = -5.5V, V

= 5.5V, f

= 5MHz; (for SPI

SCK

= 5MHz; (for SPI

SCK

= 5MHz; (for SPI

SCK

Active, Read and Non-volatile Write states only) V- = -2.25V , V

Active, Read and Non-volatile Write states only)

= +5.5V , V- = -5.5V @ +85°C, SPI interface

in standby state V

= +5.5V, V- = -5.5V @ +125°C, SPI

= 2.25V , f

= 5MHz; (for SPI

SCK

interface in standby state V

= +2.25V, V- = -2.25V @ +85°C, SPI

interface in standby state V

= +2.25V, V- = -2.25V @ +125°C, SPI

interface in standby state

(Note 19)

-1 -0.18 mA

-0.4 -0.06 mA

-2 -1.2 mA

-0.7 -0.4 mA

TYP

(Note 4)

MAX

(Note 19) UNIT

(Note 11)

TYP

(Note 4)

MAX

(Note 19) UNIT

0.36 1 mA

0.13 0.4 mA

12mA

0.3 0.7 mA

0.2 1.5 µA

12.5µA

0.1 1 µA

0.5 2 µA

FN6424.0

July 17, 2007

ISL22414

Operating Specifications Over the recommended operating conditions unless otherwise specified. Limits are established by

characterization. (Continued)

MIN

SYMBOL PARAMETER TEST CONDITIONS

V-SB

V- Current (standby) V- = -5.5V , V

in standby state V-

= -5.5V, V

interface in standby state V-

= -2.25V, V

= +5.5V @ +85°C, SPI interface

= +5.5V @ +125°C, SPI

= +2.25V @ +85°C, SPI

(Note 19)

-2.5 -0.7 µA

-4 -3 µA

-1.5 -0.3 µA

interface in standby state V-

= -2.25V, V

interface in standby state

VCC Current (shutdown) V

= +5.5V , V- = -5.5V @ +85°C, SPI interface

in standby state V

= +5.5V, V- = -5.5V @ +125°C, SPI

= +2.25V @ +125°C, SPI

-3 -1 µA

interface in standby state V

= +2.25V, V- = -2.25V @ +85°C, SPI

interface in standby state V

= +2.25V, V- = -2.25V @ +125°C, SPI

interface in standby state

V-SD

V- Current (shutdown) V- = -5.5V , V

= +5.5V @ +85°C, SPI interface

-2.5 -0.7 µA

in standby state V-

= -5.5V, V

= +5.5V @ +125°C, SPI

-4 -3 µA

interface in standby state V-

LkgDig

WRT

(Note 18)

ShdnRec

(Note 18)

interface in standby state V-

interface in standby state

Leakage current, at pins SCK, SDI, SDO and CS

Voltage at pin from GND to V

DCP wiper response time CS

DCP recall time from shutdown mode CS

connection

= -2.25V, V

rising edge to wiper new position 1.5 µs

rising edge to wiper stored position and RH

= +2.25V @ +85°C, SPI

= +2.25V @ +125°C, SPI

-1.5 -0.3 µA

-3 -1 µA

-0.5 0.5 µA

Vpor Power-on recall voltage Minimum Vcc at which memory recall occurs 1.9 2.1 V

VccRamp V

ramp rate 0.2 V/ms

Power-up delay VCC above Vpor, to DCP Initial Value Register

recall completed, and SPI Interface in standby state

EEPROM SPECIFICATION

EEPROM Endurance 1,000,000 Cycles EEPROM Retention Temperature T ≤ +55ºC 50 Years

(Note 16)

Non-volatile Write Cycle time 12 20 ms

SERIAL INTERFACE SPECIFICATIONS

SCK, SDI, and CS input buffer LOW

-0.3 0.3*V

voltage

Hysteresis

SCK, SDI, and CS input buffer HIGH

voltage SCK, SDI, and CS input buffer

0.7*V

0.05*V

hysteresis

SDO output buffer LOW voltage IOL = 4mA for Open Drain output, pull-up

voltage Vpu = V

00.4V

TYP

(Note 4)

0.2 1.5 µA

12.5µA

0.1 1 µA

0.5 2 µA

1.5 µs

MAX

(Note 19) UNIT

5ms

VCC+0.3 V

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July 17, 2007

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