ISL22313TFU10Z View Datasheet(PDF) - Intersil

Part Name

Description

View to exact match

ISL22313TFU10Z

Single Digitally Controlled Potentiometer (XDCP™)

Intersil 

ISL22313

Typical Performance Curves (Continued)

500

400

10k

INPUT

OUTPUT

300

200

50k

100

0

16

66

116

166

216

TAP POSITION (DECIMAL)

FIGURE 11. TC FOR RHEOSTAT MODE IN ppm

WIPER AT MID POINT (POSITION 80h)

RTOTAL = 10kΩ

FIGURE 12. FREQUENCY RESPONSE (1MHz)

SCL

WIPER

CS

WIPER UNLOADED,

MOVEMENT FROM 0h to FFh

FIGURE 13. MIDSCALE GLITCH, CODE 7Fh TO 80h

Pin Description

Potentiometers Pins

RH and RL

The high (RH) and low (RL) terminals of the ISL22313 are

equivalent to the fixed terminals of a mechanical

potentiometer. RH and RL are referenced to the relative

position of the wiper and not the voltage potential on the

terminals. With WR set to 255 decimal, the wiper will be

closest to RH, and with the WR set to 0, the wiper is closest

to RL.

RW

RW is the wiper terminal, and it is equivalent to the movable

terminal of a mechanical potentiometer. The position of the

wiper within the array is determined by the WR register.

FIGURE 14. LARGE SIGNAL SETTLING TIME

Bus Interface Pins

Serial Data Input/Output (SDA)

The SDA is a bidirectional serial data input/output pin for I2C

interface. It receives device address, operation code, wiper

address and data from an I2C external master device at the

rising edge of the serial clock SCL, and it shifts out data after

each falling edge of the serial clock.

SDA requires an external pull-up resistor, since it is an open

drain input/output.

Serial Clock (SCL)

This input is the serial clock of the I2C serial interface. SCL

requires an external pull-up resistor, since it is an open drain

input.

10

FN6421.0

July 17, 2007

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