cat522 Catalyst Semiconductor, cat522 Datasheet

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cat522

Manufacturer Part Number
cat522
Description
Configured Digitally Programmable Potentiometer Dpp? Programmable Voltage Applications
Manufacturer
Catalyst Semiconductor
Datasheet
Configured Digitally Programmable Potentiometer (DPP™):
Programmable Voltage Applications
FEATURES
APPLICATIONS
PIN CONFIGURATION
© Catalyst Semiconductor, Inc.
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
V
DO 6
CS 4
SOIC 14-Lead (W)
DI 5
DD
PDIP 14-Lead (L)
1
CAT522
14 V
13 V
12 V
11 V
10 V
8
8
V
GND
REFH1
REFH1
OUT1
OUT2
REFL2
REFL1
1
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. G
CAT522
where

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cat522 Summary of contents

Page 1

... 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° ...

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 REFH1 REFH2 24kΩ + – 24kΩ + – SERIAL DATA OUTPUT REGISTER REFL1 REFL2 OUT2 12 V OUT1 6 DO © ...

Page 3

... Conditions Conditions I = -40µ 1mA + 0.4mA + CAT522 Ratings Units - +70 °C -40 to +85 °C +150 °C -65 to +150 °C +300 °C Min Max Units 2000 V 100 mA Min ...

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 Integral Linearity Error DNL Differential Linearity Error R Buffer Output Resistance OUT I Buffer Output Current ...

Page 5

... CLK t CSS CS t DIS PROG RDY/BSY t o © Catalyst Semiconductor, Inc. Characteristics subject to change without notice CLK t L CLK t DIH t DO0 t DO1 PROG CAT522 CSH t CSMIN BUSY 4 5 Doc. No. MD-2004 Rev. G ...

Page 6

... For all CLOCK The CAT522’s clock controls both data flow in and out of the IC and non-volatile memory cell programming. Serial data is shifted into the DI pin and out of the DO pin on the clock’s rising edge. While it is not neces– ...

Page 7

... DATA OUTPUT Data is output serially by the CAT522, LSB first, via the Data Out (DO) pin following the reception of a start bit and two address bits by the Data Input (DI). DO becomes active whenever CS goes high and resumes its high impedance Tri-State mode when CS returns low ...

Page 8

... When it is desired to save a new setting acquired using this feature, the new value must be reloaded into the programming. This is because the CAT522’s internal control circuitry discards from the programming register the new data two clock cycles after receiving PROG signal is received. ...

Page 9

... 010 REF REF REF OUT 255 V+ I > 2mA REFH LT 1029 CAT522 V GND REFL 28 - 32V 10kΩ MPT3055EL OUTPUT 0 - 25V 10µ 35V Doc. No. MD-2004 Rev 5.00V ...

Page 10

... Outputs for Single Power Supply Systems +5V 2.2kΩ DPP1 CONTROL CAT522 & DATA DPP2 GND Doc. No. MD-2004 Rev FINE ADJUST DPP CAT522 +V COARSE ADJUST + DPP – GND Coarse-Fine Offset Control by Averaging DPP Outputs for Dual Power Supply Systems 4.7µF V LM385-2.5 REFH +15V + – +5V 10kΩ ...

Page 11

... Characteristics subject to change without notice 51kΩ 10kΩ V REFH 5MΩ 5MΩ – + 5MΩ 5MΩ – V REFL + LM385-2.5 -15V 11 CAT522 +15V + TIP29 – 10kΩ 39Ω 1W 39Ω 1W BS170P 1mA steps 3.9kΩ BS170P 5µA steps ÷ 255mA SOURCE Doc. No. MD-2004 Rev. G ...

Page 12

... CAT522 PACKAGE OUTLINE DRAWING (1)(2) PDIP 14-LEAD (L) D TOP VIEW e b1 SIDE VIEW For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-001. Doc. No. MD-2004 Rev. G SYMBOL A1 A2 ...

Page 13

... All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. © Catalyst Semiconductor, Inc. Characteristics subject to change without notice SYMBOL MIN A 1.35 A1 0.10 b 0.33 c 0. 5.80 E1 3.80 e 1.27 BSC h 0.25 L 0.40 θ 0º h θ END VIEW 13 CAT522 NOM MAX 1.75 0.25 0.51 0.25 8.65 8.75 6.00 6.20 3.90 4.00 0.50 1.27 8º c Doc. No. MD-2004 Rev. G ...

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 Temperature Range dustrial (- 40º ...

Page 15

... Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. ...

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