CAT522WI-T2 ON Semiconductor, CAT522WI-T2 Datasheet

Digital Potentiometer ICs DPP,NV,256 taps Dual 3 wire,w/Buf

CAT522WI-T2

Manufacturer Part Number

CAT522WI-T2

Description

Digital Potentiometer ICs DPP,NV,256 taps Dual 3 wire,w/Buf

Manufacturer

ON Semiconductor

Datasheet

1.CAT522WI-T2.pdf (15 pages)

Specifications of CAT522WI-T2

Number Of Pots

Dual

Taps Per Pot

256

Resistance

24 KOhms

Wiper Memory

Non Volatile

Digital Interface

Serial (3-Wire, Microwire)

Operating Supply Voltage

3.3 V, 5 V

Supply Current

600 uA

Mounting Style

SMD/SMT

Supply Voltage (max)

5.5 V

Supply Voltage (min)

2.7 V

Package / Case

SOIC-14

Number Of Elements

# Of Taps

256

Power Supply Requirement

Single

Single Supply Voltage (typ)

3.3/5V

Dual Supply Voltage (typ)

Not RequiredV

Single Supply Voltage (min)

2.7V

Single Supply Voltage (max)

5.5V

Dual Supply Voltage (min)

Not RequiredV

Dual Supply Voltage (max)

Not RequiredV

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Mounting

Surface Mount

Pin Count

Package Type

SOIC

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Configured Digitally Programmable Potentiometer (DPP™):

Programmable Voltage Applications

FEATURES

APPLICATIONS

PIN CONFIGURATION

Characteristics subject to change without notice

For Ordering Information details, see page 14.

Two 8-bit DPPs configured as programmable

voltage sources in DAC-like applications

Independent reference inputs

Non-volatile NVRAM memory wiper storage

Output voltage range includes both supply rails

2 independently addressable buffered

output wipers

1 LSB accuracy, high resolution

Serial Microwire-like interface

Single supply operation: 2.7V - 5.5V

Setting read-back without effecting outputs

Automated product calibration.

Remote control adjustment of equipment

Offset, gain and zero adjustments in self-

calibrating and adaptive control systems.

Tamper-proof calibrations.

DAC (with memory) substitute.

RDY/ BSY

PROG 7

¯¯¯¯ 3

CLK 2

DO 6

CS 4

SOIC 14-Lead (W)

DI 5

PDIP 14-Lead (L)

CAT522

14 V

13 V

12 V

11 V

10 V

GND

REFH1

OUT1

OUT2

REFL2

REFL1

Not Recommended for New Design

DESCRIPTION

The CAT522 is a dual, 8-bit digitally-programmable

potentiometer (DPP™) configured for programmable

voltage and DAC-like applications. Intended for final

calibration of products such as camcorders, fax

machines and cellular telephones on automated high

volume production lines, it is also well suited for self-

calibrating

equipment which requires periodic adjustment is either

difficult to access or in a hazardous environment.

The CAT522 offers two independently programmable

DPPs each having its own reference inputs and each

capable of rail to rail output swing. The wipers are

buffered by rail to rail opamps. Wiper settings, stored

in non-volatile NVRAM memory, are not lost when the

device is powered down and are automatically

reinstated when power is returned. Each wiper can

be dithered to test new output values without effecting

the stored settings and stored settings can be read

back without disturbing the DPP's output.

The CAT522 is controlled with a simple 3-wire,

microwire-like serial interface. A Chip Select pin

allows several devices to share a common serial

interface. Communication back to the host controller is

via a single serial data line thanks to the CAT522 Tri-

Stated Data Output pin. A RDY/BSY

in concert with an internal low voltage detector signals

proper operation of the non-volatile NVRAM memory

Erase/Write cycle.

The CAT522 is available in the 0°C to 70°C

commercial and -40°C to 85°C industrial operating

temperature ranges. Both 14-pin plastic DIP and

surface mount packages are available.

systems

and

for

¯¯¯¯ output working

applications

Doc. No. MD-2004 Rev. I

CAT522

where

Related parts for CAT522WI-T2

CAT522WI-T2 Summary of contents

Page 1

Configured Digitally Programmable Potentiometer (DPP™): Programmable Voltage Applications FEATURES Two 8-bit DPPs configured as programmable voltage sources in DAC-like applications Independent reference inputs Non-volatile NVRAM memory wiper storage Output voltage range includes both supply rails 2 independently addressable buffered output ...

Page 2

CAT522 FUNCTIONAL DIAGRAM 3 RDY/BSY 7 PROGRAM PROG CONTROL SERIAL CLK CONTROL 4 CS CAT522 8 GND Doc. No. MD-2004 Rev. I Not Recommended for New Design REFH1 REFH2 24kΩ ...

Page 3

Not Recommended for New Design ABSOLUTE MAXIMUM RATINGS Parameters Ratings Supply Voltage V to GND -0 Inputs CLK to GND -0 GND -0 GND -0 ...

Page 4

CAT522 POTENTIOMETER CHARACTERISTICS V = +2.7V to +5.5V REFH DD Symbol Parameter R Potentiometer Resistance POT R to RPOT Match POT Pot Resistance Tolerance Voltage on V pin REFH Voltage on V pin REFL Resolution INL ...

Page 5

Page 6

CAT522 PIN DESCRIPTION Pin Name Function 1 V Power supply positive DD 2 CLK Clock input pin ¯¯¯¯ 3 Ready/Busy output RDY/BSY 4 CS Chip select 5 DI Serial data input pin 6 DO Serial data output pin EEPROM Programming ...

Page 7

Not Recommended for New Design No clock is necessary upon system power-up. The CAT522’s internal power-on reset circuitry loads data from non-volatile memory to the DPPs without using the external clock. As data transfers are edge triggered clean clock transitions ...

Page 8

CAT522 READING DATA Each time data is transferred into a DPP control register currently held data is shifted out via the D0 pin, thus in every data transaction a read cycle occurs. Note, however, that the reading process is destructive. ...

Page 9

Not Recommended for New Design APPLICATION CIRCUITS + REFH V DPP CONTROL CAT522 & DATA V GND REFL V OUT For OUT + REFH CONTROL CAT522 & ...

Page 10

CAT522 +5V V REF REFH 127R C FINE ADJUST DPP CAT522 OFFSET COARSE ADJUST DPP GND V REFL V REF 256 x 1µA Fine adjust gives ±1 LSB change in V ...

Page 11

Not Recommended for New Design + DPP1 CONTROL CAT522 & DATA DPP2 GND Current Source with 4 Decades of Resolution © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice 51kΩ 10kΩ V REFH 5MΩ 5MΩ ...

Page 12

CAT522 PACKAGE OUTLINE DRAWINGS (1)(2) PDIP 14-LEAD (L) D TOP VIEW e b1 SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-001. Doc. No. MD-2004 Rev. I Not Recommended for New Design ...

Page 13

Not Recommended for New Design (1)(2) SOIC 14-LEAD (W) PIN#1 IDENTIFICATION TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. © 2008 SCILLC. All rights reserved. ...

Page 14

... ORDERING PART NUMBER CAT522LI CAT522WI Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is Matte-Tin. (3) The device used in the above example is a CAT522WI-T2 (SOIC, Industrial Temperature, Tape & Reel, 2000). Doc. No. MD-2004 Rev. I Not Recommended for New Design ( Temperature Range ...

Page 15

... Add “Not Recommended for New Design” to the top of all pages. 24-Nov-08 I Change logo and fine print to ON Semiconductor ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...

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