CAT521WI-T3 ON Semiconductor, CAT521WI-T3 Datasheet

IC POT DGTL PROG V OUT 14SOIC

CAT521WI-T3

Manufacturer Part Number
CAT521WI-T3
Description
IC POT DGTL PROG V OUT 14SOIC
Manufacturer
ON Semiconductor
Series
DPPr
Datasheet

Specifications of CAT521WI-T3

Resistance (ohms)
24K
Number Of Circuits
1
Temperature Coefficient
300 ppm/°C Typical
Memory Type
Non-Volatile
Interface
Microwire, 3-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Resistance In Ohms
24K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Taps
-
Configured Digitally Programmable Potentiometer (DPP™):
Programmable Voltage Applications
FEATURES
APPLICATIONS
PIN CONFIGURATION
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
For Ordering Information details, see page 12.
8-bit DPP configured as a programmable
voltage source in DAC-like applications
Buffered wiper output
Non-volatile NVRAM memory wiper storage
Output voltage range includes both supply rails
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
V
DO 6
CS 4
SOIC 14-Lead (W)
PDIP 14-Lead (L)
DI 5
DD
1
CAT521
14 V
13 NC
12 V
11 NC
10 NC
8
8
V
GND
REFH
OUT
REFL
Not Recommended for New Design
1
DESCRIPTION
The CAT521 is a 8-bit digitally-programmable poten-
tiometer (DPP™) configured for programmable voltage
and DAC-like applications. Intended for final calibration
of products such as camcorders, fax machines and
cellular
production lines, it is also well suited for self-calibrating
systems and for applications where equipment which
requires periodic adjustment is either difficult to access
or in a hazardous environment.
The programmable DPP has an output voltage range
which includes both supply rails. The wiper is buffered
by a rail to rail op amp. The wiper setting, stored in
non-volatile NVRAM memory, is not lost when the
device is powered down and is automatically
reinstated when power is returned. The 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 CAT521 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 CAT521 Tri-
Stated Data Output pin. A RDY/BSY
concert with an internal low voltage detector signals
proper operation of the non-volatile NVRAM memory
Erase/Write cycle.
The CAT521 is available in 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.
telephones
on
automated
¯¯¯¯ output working in
Doc. No. MD-2003 Rev. I
CAT521
high
volume

Related parts for CAT521WI-T3

CAT521WI-T3 Summary of contents

Page 1

Configured Digitally Programmable Potentiometer (DPP™): Programmable Voltage Applications FEATURES 8-bit DPP configured as a programmable voltage source in DAC-like applications Buffered wiper output Non-volatile NVRAM memory wiper storage Output voltage range includes both supply rails 1 LSB accuracy, high resolution ...

Page 2

CAT521 FUNCTIONAL DIAGRAM 3 RDY/BSY 7 PROGRAM PROG CONTROL SERIAL CLK CONTROL 4 CS CAT521 8 GND Doc. No. MD-2003 Rev. I Not Recommended for New Design 24kΩ 24kΩ 24kΩ 24kΩ SERIAL DATA OUTPUT ...

Page 3

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

Page 4

CAT521 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

Not Recommended for New Design A.C. TIMING DIAGRAM t o CLK t CSS CS t DIS PROG RDY/BSY t o © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice ...

Page 6

CAT521 PIN DESCRIPTION Pin Name Function 1 V Power supply positive DD 2 CLK Clock input pin ¯¯¯¯ 3 RDY/BSY Ready/Busy output 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 CAT521 internal power-on reset circuitry loads data from non-volatile memory to the DPP without using the external clock. As data transfers are edge triggered clean clock transitions ...

Page 8

CAT521 READING DATA Each time data is transferred into the DPP wiper 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 ...

Page 9

Not Recommended for New Design APPLICATION CIRCUITS + DPP CONTROL CAT521 & DATA V GND REFL V OUT For OUT + REFH CONTROL CAT521 & DATA ...

Page 10

CAT521 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-2003 Rev. I Not Recommended for New Design ...

Page 11

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 12

... Product Number 521 Notes: (1) All packages are RoHS compliant (Lead-free, Halogen-free). (2) Standard lead finish is Matte-Tin. (3) The device used in the above example is a CAT521WI-T2 (SOIC, Industrial Temperature, Tape & Reel). ORDERING INFORMATION CAT521WI CAT521LI Doc. No. MD-2003 Rev. I Not Recommended for New Design ...

Page 13

... Add “Not Recommended for New Design” to the top of all pages 21-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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