CAT511 Catalyst Semiconductor, CAT511 Datasheet

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CAT511

Manufacturer Part Number
CAT511
Description
8-Bit Digital POT with Independent Reference Inputs
Manufacturer
Catalyst Semiconductor
Datasheet

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© 2001 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT511
8-Bit Digital POT with Independent Reference Inputs
FEATURES
DESCRIPTION
The CAT511 is an 8-Bit Memory DAC designed as an
electronic replacement for mechanical potentiometers
and trim pots. Intended for final calibration of products
such as camcorders, fax machines and cellular tele-
phones on automated high volume production lines and
systems capable of self calibration, it is also well suited
for applications were equipment requiring periodic ad-
justment is either difficult to access or located in a
hazardous environment.
The CAT511 consists of a programmable DAC with
independent high and low reference inputs and is ca-
pable of a rail to rail output swing. Output settings, stored
non-volatile EEPROM memory, are not lost when the
device is powered down and are automatically rein-
stated when power is returned. The output can be
dithered to test new output values without effecting the
stored setting and can be read back without disturbing
the DAC’s output.
FUNCTIONAL DIAGRAM
Advanced Information
RDY/BSY
PROG
Output settings retained without power
Output range includes both supply rails
Programming voltage generated on-chip
Serial P interface
Single supply operation: 2.7V-5.5V
CLK
CS
DI
3
7
2
4
5
CONTROLLER
PROGRAM
CONTROL
CHARGE
PUMP
DATA
H.V.
SERIAL DATA OUTPUT
CAT511
EEPROM
LATCH
GND
V
DD
8
1
DAC 1
14
12
6
9
DO
V
V
V
REF
OUT
REF
1
H1
L1
1
APPLICATIONS
Control of the CAT511 is accomplished with a simple 3
wire serial interface. A Chip Select pin allows several
CAT511's to share a common serial interface and com-
munications back to the host controller is via a single
serial data line thanks to the CAT511’s Tri-Stated Data
Output pin. A RDY/BSYoutput working in concert with
an internal low voltage detector signals proper operation
of EEPROM Erase/Write cycle.
The CAT511 operates from a single 3–5 volt power
supply. The high voltage required for EEPROM Erase/
Write operations is generated on-chip.
The CAT511 is available in the 0 C to 70 C Commercial
and –40 C to +85 C Industrial operating temperature
ranges and offered in 14-pin plastic DIP and Surface
mount packages.
PIN CONFIGURATION
RDY/BSY
Automated product calibration.
Remote control adjustment of equipment
Offset, gain and zero adjustments in Self-
Calibrating and Adaptive Control systems.
Tamper-proof calibrations.
PROG
V DD
CLK
DO
CS
DI
DIP Package (P)
1
2
3
4
5
6
7
CAT511
14
13
12
11
10
9
8
V REF H1
NC
V OUT 1
NC
NC
V REF L1
GND
RDY/BSY
PROG
V DD
CLK
DO
CS
SOIC Package (J)
DI
1
2
3
4
5
6
7
CAT511
14
13
12
11
10
9
8
V REF L1
V REF H1
V OUT 1
GND
NC
NC
NC

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CAT511 Summary of contents

Page 1

... The CAT511 operates from a single 3–5 volt power supply. The high voltage required for EEPROM Erase/ Write operations is generated on-chip. The CAT511 is available in the Commercial and – +85 C Industrial operating temperature ranges and offered in 14-pin plastic DIP and Surface mount packages ...

Page 2

... CAT511 ABSOLUTE MAXIMUM RATINGS Supply Voltage GND ...................................... –0.5V to +7V DD Inputs CLK to GND ............................ –0. GND .............................. –0. GND ............................... –0. RDY/BSY to GND ................... –0. PROG to GND ........................ –0. GND ........................ –0. REF GND ......................... –0. REF ...

Page 3

... L see note pF +5V LOAD pF +3V LOAD MHz 0V MHz OUT / CAT511 Min Typ Max Units 0.99 V 0.995 V — — 0.005 V 0. — — 1 — — 100K — — 150K — ...

Page 4

... CAT511 A. C. TIMING DIAGRAM CLK t CSS CS t DIS PROG RDY/BSY CLK t L CLK t DIH t DO0 t DO1 PROG Advanced Information CSH t CSMIN BUSY 4 5 ...

Page 5

... CLOCK The CAT511’s clock controls both data flow in and out of the device and EEPROM 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 necessary for ...

Page 6

... DATA OUTPUT Data is output serially by the CAT511, LSB first, via the Data Out (DO) pin following the reception of a start bit and two address bits by the Data Input (DI). becomes active whenever CS goes high and resumes Figure 1 ...

Page 7

... EEPROM then a change would occur at the read cycle’s conclusion. TEMPORARILY CHANGE OUTPUT The CAT511 allows temporary changes in the DAC’s output to be made without disturbing the setting retained in EEPROM memory. This feature is particularly useful when testing for a new output setting and allows for user adjustment of preset or default values without losing the original factory settings ...

Page 8

... V L REF Digitally Trimmed Voltage Reference 5.000V REF LT 1029 CONTROL & DATA Digitally Controlled Voltage Reference 8 Advanced Information 28 - 32V 15K 10 µF 1N5231B 5. REF 10K CAT511 + OPT 505 – LM 324 GND V L REF 4.02 K 1.00K MPT3055EL OUTPUT 10 µ 25V 35V @ 1A ...

Page 9

... ORDERING INFORMATION Prefix Device # CAT 511 Optional Product Company ID Number Notes: (1) The device used in the above example is a CAT511JI-TE13 (SOIC, Industrial Temperature, Tape & Reel) Suffix J I Package 2000/Reel P: PDIP J: SOIC Temperature Range Blank = Commercial (0˚C to +70˚ Industrial (-40˚C to +85˚C) ...

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