CAT5116 PDF даташит
Спецификация CAT5116 изготовлена «Catalyst Semiconductor» и имеет функцию, называемую «100-Tap Digitally Programmable Potentiometer (DPP)». |
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Детали детали
Номер произв | CAT5116 |
Описание | 100-Tap Digitally Programmable Potentiometer (DPP) |
Производители | Catalyst Semiconductor |
логотип |
12 Pages
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CAT5116
Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
100-position, log-taper potentiometer
Non-volatile EEPROM wiper storage
10nA ultra-low standby current
Single-supply operation: 2.5V – 5.5V
Increment Up/Down serial interface
Resistance value: 32kΩ
Available in 8-pin MSOP, TSSOP, SOIC and DIP
packages
APPLICATIONS
Automated product calibration
Remote control adjustments
Offset, gain and zero control
Audio volume control
Sensor adjustment
Motor controls and feedback systems
Programmable analog functions
For Ordering Information details, see page 11.
DESCRIPTION
The CAT5116 is a log-taper single digitally program-
mable potentiometer (DPP™) designed as a electro-
nic replacement for mechanical potentiometers.
Ideal for automated adjustments on high volume
production lines, DPP ICs are well suited for applica-
tions where equipment requiring periodic adjustment
is either difficult to access or located in a hazardous or
remote environment.
The CAT5116 contains a 100-tap series resistor array
connected between two terminals RH and RL. An
up/down counter and decoder that are controlled by
three input pins, determines which tap is connected to
the wiper, RW.
The wiper setting, stored in nonvolatile memory, is not
lost when the device is powered down and is
automatically reinstated when power is returned. The
wiper can be adjusted to test new system values
without effecting the stored setting.
Wiper-control of the CAT5116 is accomplished with
three input control pins, C¯¯S, U/D¯, and I¯N¯C¯. The I¯N¯C¯
input increments the wiper in the direction which is
determined by the logic state of the U/D¯ input. The C¯¯S
input is used to select the device and also store the
wiper position prior to power down.
FUNCTIONAL DIAGRAM
The digitally programmable potentiometer can be used
as a three-terminal resistive divider or as a two-terminal
variable resistor.
VCC
U/D
Control
INC and
Memory
CS
Power On Recall
GND
General
RH U/D
INC
CS
RW
RL
GND
VCC
RH
INTERFACE
&
WIPER
CONTROL
Potentiometer
R = 32kΩ
EEPROM
RL
Block Diagram
165Ω
LOG
TAPER
RTOT= 32kΩ
RW
RH
RW
11Ω
10.4Ω
RL
Potentiometer Schematic
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-2118 Rev. K
No Preview Available ! |
CAT5116
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PIN CONFIGURATION
PDIP 8-Lead (L)
SOIC 8 Lead (V)
MSOP 8 Lead (Z)
I¯N¯C¯ 1
8 VCC
U/D¯ 2 CAT 7 C¯¯S
RH 3
6 RL
GND 4
5 RWB
TSSOP 8 Lead (Y)
C¯¯S 1
8 RL
VCC
27
CAT
RW
I¯N¯C¯ 3
6 GND
U/D¯ 4
5 RH
PIN DESCRIPTION
I¯N¯C¯: Increment Control Input
The I¯N¯C¯ input moves the wiper in the up or down
direction determined by the condition of the U/D¯ input.
U/D¯: Up/Down Control Input
The U/D¯ input controls the direction of the wiper
movement. When in a high state and C¯¯S is low, any
high-to-low transition on I¯N¯C¯ will cause the wiper to
move one increment toward the RH terminal. When in
a low state and C¯¯S is low, any high-to-low transition
on I¯N¯C¯ will cause the wiper to move one increment
towards the RL terminal.
RH: High End Potentiometer Terminal
RH is the high end terminal of the potentiometer. It is
not required that this terminal be connected to a
potential greater than the RL terminal. Voltage applied
to the RH terminal cannot exceed the supply voltage,
VCC or go below ground, GND.
RW: Wiper Potentiometer Terminal
RW is the wiper terminal of the potentiometer. Its
position on the resistor array is controlled by the
control inputs, I¯N¯C¯, U/D¯ and C¯¯S. Voltage applied to
the RW terminal cannot exceed the supply voltage,
VCC or go below ground, GND.
RL: Low End Potentiometer Terminal
RL is the low end terminal of the potentiometer. It is
not required that this terminal be connected to a
potential less than the RH terminal. Voltage applied to
the RL terminal cannot exceed the supply voltage, VCC
or go below ground, GND. RL and RH are electrically
interchangeable.
PIN DESCRIPTIONS
Name
I¯N¯C¯
U/D¯
RH
GND
RW
RL
C¯¯S
VCC
Function
Increment Control
Up/Down Control
Potentiometer High Terminal
Ground
Buffered Wiper Terminal
Potentiometer Low Terminal
Chip Select
Supply Voltage
C¯¯S: Chip Select
The chip select input is used to activate the control
input of the CAT5116 and is active low. When in a
high state, activity on the I¯N¯C¯ and U/D¯ inputs will not
affect or change the position of the wiper.
DEVICE OPERATION
The CAT5116 operates like a digitally controlled
potentiometer with RH and RL equivalent to the high
and low terminals and RW equivalent to the
mechanical potentiometer's wiper. There are 100 tap
positions including the resistor end points, RH and RL.
There are 99 resistor elements connected in series
between the RH and RL terminals. The wiper terminal
is connected to one of the 100 taps and controlled by
three inputs, I¯N¯C¯, U/D¯ and C¯¯S. These inputs control a
seven-bit up/down counter whose output is decoded
to select the wiper position. The selected wiper
position can be stored in nonvolatile memory using
the I¯N¯C¯ and C¯¯S inputs.
With C¯¯S set LOW the CAT5116 is selected and will
respond to the U/D¯ and INC inputs. HIGH to LOW
transitions on INC wil increment or decrement the wiper
(depending on the state of the U/D¯ input and seven-bit
counter). The wiper, when at either fixed terminal, acts
like its mechanical equivalent and does not move
beyond the last position. The value of the counter is
stored in nonvolatile memory whenever C¯¯S transitions
HIGH while the I¯N¯C¯ input is also HIGH. When the
CAT5116 is powered-down, the last stored wiper counter
position is maintained in the nonvolatile memory. When
power is restored, the contents of the memory are
recalled and the counter is set to the value stored.
With I¯N¯C¯ set low, the CAT5116 may be deselected
and powered down without storing the current wiper
position in nonvolatile memory. This allows the system
to always power up to a preset value stored in
nonvolatile memory.
Doc. No. MD-2118 Rev. K
2 © 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
No Preview Available ! |
OPERATING MODES
I¯N¯C¯ C¯¯S
High to Low
Low
High to Low
Low
High
Low to High
Low Low to High
X High
U/D¯
High
Low
X
X
X
Operation
Wiper toward H
Wiper toward L
Store Wiper Position
No Store, Return to Standby
Standby
www.DataSCheAet4TU5.c1om16
RH
CH
RWI
RW
CW
CL Potentiometer
RL Equivalent Circuit
ABSOLUTE MAXIMUM RATINGS(1)
Parameters
Supply Voltage
VCC to GND
Inputs
C¯¯S to GND
I¯N¯C¯ to GND
U/D¯ to GND
RH to GND
RL to GND
RW to GND
Ratings
Units
-0.5 to +7V
V
-0.5 to VCC +0.5
-0.5 to VCC +0.5
-0.5 to VCC +0.5
-0.5 to VCC +0.5
-0.5 to VCC +0.5
-0.5 to VCC +0.5
V
V
V
V
V
V
Parameters
Operating Ambient Temperature
Industrial (‘I’ suffix)
Junction Temperature (10s)
Storage Temperature
Lead Soldering (10s max)
RELIABILITY CHARACTERISTICS
Symbol
VZAP(2)
ILTH(2) (3)
TDR
NEND
Parameter
ESD Susceptibility
Latch-Up
Data Retention
Endurance
Test Method
MIL-STD-883, Test Method 3015
JEDEC Standard 17
MIL-STD-883, Test Method 1008
MIL-STD-883, Test Method 1003
Min
2000
100
100
1,000,000
Typ
Ratings
-40 to +85
+150
+150
+300
Max
Units
ºC
ºC
ºC
ºC
Units
V
mA
Years
Stores
DC ELECTRICAL CHARACTERISTICS
VCC = +2.5V to +5.5V unless otherwise specified
Power Supply
Symbol Parameter
Conditions
Min Typ
Max
Units
VCC Operating Voltage Range
2.5 –
ICC1(4)
Supply Current (Increment) VCC = 5.5V, f = 1MHz, IW = 0
VCC = 5.5V, f = 250kHz, IW = 0
–
–
–
–
ICC2 Supply Current (Write)
Programming, VCC = 5.5V
VCC = 3V
ISB1
Supply Current (Standby)
C¯¯S = VCC - 0.3V
U/D¯, I¯N¯C¯ = VCC - 0.3V or GND
–
0.01
5.5
100
50
1
500
1
V
µA
µA
mA
µA
µA
Notes:
(1) 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 performance and reliability.
(2) This parameter is tested initially and after a design or process change that affects the parameter.
(3) Latch-up protection is provided for stresses up to 100mA on address and data pins from -1V to VCC + 1V
(4) IW = source or sink
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
3
Doc. No. MD-2118 Rev. K
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