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CAT5221 PDF даташит

Спецификация CAT5221 изготовлена ​​​​«Catalyst Semiconductor» и имеет функцию, называемую «Dual Digitally Programmable Potentiometers (DPP)».

Детали детали

Номер произв CAT5221
Описание Dual Digitally Programmable Potentiometers (DPP)
Производители Catalyst Semiconductor
логотип Catalyst Semiconductor логотип 

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CAT5221 Даташит, Описание, Даташиты
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CAT5221
Dual Digitally Programmable Potentiometers (DPP™)
with 64 Taps and 2-wire Interface
FEATURES
ALOGEN FR
LEA D F REETM
s Two linear-taper digitally programmable
potentiometers
s 64 resistor taps per potentiometer
s End to end resistance 2.5k, 10k, 50kor 100k
s Potentiometer control and memory access via
2-wire interface (I2C like)
s Low wiper resistance, typically 80
s Nonvolatile memory storage for up to four wiper
settings for each potentiometer
s Automatic recall of saved wiper settings at
power up
s 2.5 to 6.0 volt operation
s Standby current less than 1µA
s 1,000,000 nonvolatile WRITE cycles
s 100 year nonvolatile memory data retention
s 20-lead SOIC and TSSOP packages
s Industrial temperature ranges
DESCRIPTION
The CAT5221 is two Digitally Programmable
Potentiometers (DPPs™) integrated with control logic
and 16 bytes of NVRAM memory. Each DPP consists of
a series of 63 resistive elements connected between two
externally accessible end points. The tap points between
each resistive element are connected to the wiper outputs
with CMOS switches. A separate 6-bit control register
(WCR) independently controls the wiper tap switches for
each DPP. Associated with each wiper control register
are four 6-bit non-volatile memory data registers (DR)
used for storing up to four wiper settings. Writing to the
wiper control register or any of the non-volatile data
registers is via a 2-wire serial bus (I2C-like). On power-
up, the contents of the first data register (DR0) for each
of the four potentiometers is automatically loaded into its
respective wiper control register (WCR).
The CAT5221 can be used as a potentiometer or as a
two terminal, variable resistor. It is intended for circuit
level or system level adjustments in a wide variety of
applications.
PIN CONFIGURATION
SOIC Package (J, W)
TSSOP Package (U, Y)
RW0
RL0
RH0
A0
A2
RW1
RL1
RH1
SDA
GND
1 20
2 19
3 18
4 17
5 CAT 16
6 5221 15
7 14
8 13
9 12
10 11
VCC
NC
NC
NC
A1
A3
SCL
NC
NC
NC
FUNCTIONAL DIAGRAM
RH0 RH1
SCL
SDA
2-WIRE BUS
INTERFACE
WIPER
CONTROL
REGISTERS
A0
A1 CONTROL
A2 LOGIC
A3
NONVOLATILE
DATA
REGISTERS
RL0 RL1
R W0
R W1
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Document No. 2113, Rev. I









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CAT5221 Даташит, Описание, Даташиты
CAT5221
PIN DESCRIPTION
Pin
(SOIC) Name
Function
1 RW0 Wiper Terminal for Potentiometer 0
2 RL0 Low Reference Terminal for Potentiometer 0
3 RH0 High Reference Terminal for Potentiometer 0
4 A0 Device Address, LSB
5 A2 Device Address
6 RW1 Wiper Terminal for Potentiometer 1
7 RL1 Low Reference Terminal for Potentiometer 1
8 RH1 High Reference Terminal for Potentiometer 1
9
SDA
Serial Data Input/Output
10
GND
Ground
11 NC No Connect
12 NC No Connect
13 NC No Connect
14 SCL Bus Serial Clock
15 A3 Device Address
16 A1 Device Address
17 NC No Connect
18 NC No Connect
19 NC No Connect
20
VCC
Supply Voltage
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PIN DESCRIPTIONS
SCL: Serial Clock
The CAT5221 serial clock input pin is used to clock
all data transfers into or out of the device.
SDA: Serial Data
The CAT5221 bidirectional serial data pin is used
to transfer data into and out of the device. The
SDA pin is an open drain output and can be wire-
OR'd with the other open drain or open collector
outputs.
A0, A1, A2, A3: Device Address Inputs
These inputs set the device address when
addressing multiple devices. A total of sixteen
devices can be addressed on a single bus.
A match in the slave address must be made
with the address input in order to initiate
communication with the CAT5221.
RH, RL: Resistor End Points
The two sets of RH and RL pins are equivalent
to the terminal connections on a mechanical
potentiometer.
RW: Wiper
The two RW pins are equivalent to the wiper
terminal of a mechanical potentiometer.
DEVICE OPERATION
The CAT5221 is two resistor arrays integrated with 2-
wire serial interface logic, two 6-bit wiper control registers
and eight 6-bit, non-volatile memory data registers.
Each resistor array contains 63 separate resistive
elements connected in series. The physical ends of
each array are equivalent to the fixed terminals of a
mechanical potentiometer (RH and RL). RH and RL are
symmetrical and may be interchanged. The tap positions
between and at the ends of the series resistors are
connected to the output wiper terminals (RW) by a
CMOS transistor switch. Only one tap point for each
potentiometer is connected to its wiper terminal at a time
and is determined by the value of the wiper control
register. Data can be read or written to the wiper control
registers or the non-volatile memory data registers via
the 2-wire bus. Additional instructions allow data to be
transferred between the wiper control registers and
each respective potentiometer's non-volatile data
registers. Also, the device can be instructed to operate
in an "increment/decrement" mode.
Document No. 2113, Rev. I
2









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CAT5221 Даташит, Описание, Даташиты
CAT5221
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ABSOLUTE MAXIMUM RATINGS*
Temperature Under Bias .................. -55°C to +125°C
Storage Temperature ........................ -65°C to +150°C
Voltage on any Pin with
Respect toVSS(1)(2) ................. -2.0V to +VCC +2.0V
VCC with Respect to Ground ................ -2.0V to +7.0V
Package Power Dissipation
Capability (TA = 25°C) ................................... 1.0W
Lead Soldering Temperature (10 secs) ............ 300°C
Wiper Current .................................................. +12mA
*COMMENT
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. These are stress
ratings only, and functional operation of the device at these or any
other conditions outside of those listed in the operational sections
of this specification is not implied. Exposure to any absolute
maximum rating for extended periods may affect device perfor-
mance and reliability.
Recommended Operating Conditions:
VCC = +2.5V to +6.0V
Temperature
Min
Industrial
-40°C
Max
85°C
Note:
(1) The minimum DC input voltage is 0.5V. During transitions, inputs may undershoot to 2.0V for periods of less than 20 ns.
Maximum DC voltage on output pins is VCC +0.5V, which may overshoot to VCC +2.0V for periods of less than 20 ns.
(2) Latch-up protection is provided for stresses up to 100 mA on address and data pins from 1V to VCC +1V.
POTENTIOMETER CHARACTERISTICS
Over recommended operating conditions unless otherwise stated.
Symbol
Parameter
Test Conditions
RPOT
Potentiometer Resistance (-00)
RPOT
Potentiometer Resistance (-50)
RPOT
Potentiometer Resistance (-10)
RPOT
Potentiometer Resistance (-2.5)
Potentiometer Resistance
Tolerance
Min Typ Max Units
100 k
50 k
10 k
2.5 k
+20 %
RPOT Matching
Power Rating
25°C, each pot
1%
50 mW
IW
RW
RW
VTERM
VN
TCRPOT
TCRATIO
CH/CL/CW
fc
Wiper Current
Wiper Resistance
Wiper Resistance
Voltage on any RH or RL Pin
Noise
Resolution
Absolute Linearity (2)
Relative Linearity (3)
Temperature Coefficient of
RPOT
Ratiometric Temp. Coefficient
Potentiometer Capacitances
Frequency Response
IW = +3mA @ VCC =3V
IW = +3mA @ VCC = 5V
VSS = 0V
(1)
Rw(n)(actual)-R(n)(expected)(5)
Rw(n+1)-[Rw(n)+LSB](5)
(1)
(1)
(1)
RPOT = 50k(1)
GND
80
TBD
1.6
+300
+6
300
150
VCC
+1
+0.2
10/10/25
0.4
20
mA
V
nV/ Hz
%
LSB (4)
LSB (4)
ppm/°C
ppm/°C
pF
MHz
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Absolute linearity is utilitzed to determine actual wiper voltage versus expected voltage as determined by wiper position when used
as a potentiometer.
(3) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a
potentiometer. It is a measure of the error in step size.
(4) LSB = RTOT / 63 or (RH - RL) / 63, single pot
(5) n = 0, 1, 2, ..., 63
3 Document No. 2113, Rev. I










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