CAT5115 PDF даташит
Спецификация CAT5115 изготовлена «Catalyst Semiconductor» и имеет функцию, называемую «32-Tap Digitally Programmable Potentiometer (DPP)». |
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Детали детали
Номер произв | CAT5115 |
Описание | 32-Tap Digitally Programmable Potentiometer (DPP) |
Производители | Catalyst Semiconductor |
логотип |
14 Pages
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CAT5115
32-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
32-position linear taper potentiometer
Low power CMOS technology
Single supply operation: 2.5V – 6V
Increment up/down serial interface
Resistance values: 10kΩ, 50kΩ and 100kΩ
Available in PDIP, SOIC, TSSOP, MSOP and
space saving 2 x 2.5mm TDFN packages
APPLICATIONS
Automated product calibration
Remote control adjustments
Offset, gain and zero control
Tamper-proof calibrations
Contrast, brightness and volume controls
Motor controls and feedback systems
Programmable analog functions
For Ordering Information details, see page 13.
FUNCTIONAL DIAGRAM
VCC
U/D
Control
INC and
Power-On
CS Recall
GND
RH
RW
RL
General
VDD
GND
CS
INC
U/D
DESCRIPTION
The CAT5115 is a single digitally programmable
potentiometer (DPP™) designed as a electronic
replacement for mechanical potentiometers and trim
pots. Ideal for automated adjustments on high volume
production lines, they are also well suited for
applications where equipment requiring periodic
adjustment is either difficult to access or located in a
hazardous or remote environment.
The CAT5115 contains a 32-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 is always set to the mid
point, tap 15 at power up. The tap position is not
stored in memory. Wiper-control of the CAT5115 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.
The digitally programmable potentiometer can be used
as a three-terminal resistive divider or as a two-terminal
variable resistor. DPPs bring variability and program-
mability to a wide variety of applications including
control, parameter adjustments, and signal processing.
For a pin-compatible device that recalls a stored tap
position on power-up refer to the CAT5114 data sheet.
RH/VH
RH
RW/VW
RW
RL/VL
Detailed
RL
Electronic Potentiometer
Implementation
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-2117 Rev. H
No Preview Available ! |
CAT5115
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
RWB
I¯N¯C¯ 3
6 GND
U/D¯ 4
5 RH
TDFN 8-Pad
(ZD7) Top View
I¯N¯C¯ 1
U/D¯ 2
RH 3
GND 4
8 VCC
7 C¯¯S
6 RL
5 RWB
PIN FUNCTION
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.
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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 CAT5115 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 CAT5115 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 32
available tap positions including the resistor end
points, RH and RL. There are 31 resistor elements
connected in series between the RH and RL terminals.
The wiper terminal is connected to one of the 32 taps
and controlled by three inputs, I¯N¯C¯, U/D¯ and C¯¯S.
These inputs control a five-bit up/down counter whose
output is decoded to select the wiper position.
With C¯¯S set LOW the CAT5115 is selected and will
respond to the U/D¯ and I¯N¯C¯ inputs. HIGH to LOW
transitions on I¯N¯C¯ will increment or decrement the
wiper (depending on the state of the U/D¯ input and
five-bit counter). The wiper, when at either fixed
terminal, acts like its mechanical equivalent and does
not move beyond the last position. When the
CAT5115 is powered-down, the wiper position is
reset. When power is restored, the counter is set to
the mid point, tap 15.
Doc. No. MD-2117 Rev. H
2 © Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
No Preview Available ! |
OPERATION 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
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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
H to GND
L to GND
W to GND
Ratings
-0.5 to +7V
-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
Units
V
V
V
V
V
V
V
Parameters
Operating Ambient Temperature
Industrial (‘I’ suffix)
Junction Temperature
Storage Temperature
Lead Soldering (10s max)
Ratings Units
-40 to +85
+150
-65 to 150
+300
ºC
ºC
ºC
ºC
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
Max Units
V
mA
Years
Stores
DC ELECTRICAL CHARACTERISTICS
VCC = +2.5V to +6V unless otherwise specified
Power Supply
Symbol Parameter
Conditions
Min Typ
VCC Operating Voltage Range
2.5 –
ICC1
Supply Current (Increment) VCC = 6V, f = 1MHz, IW = 0
VCC = 6V, f = 250kHz, IW = 0
––
––
ISB1(3)
Supply Current (Standby)
C¯¯S = VCC - 0.3V
U/D¯, I¯N¯C¯ = VCC - 0.3V or GND
–
0.01
Max
6
100
50
1
Units
V
µA
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.
(5) These parameters are periodically sampled and are not 100% tested.
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
3
Doc. No. MD-2117 Rev. H
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