CAT5111 PDF даташит
Спецификация CAT5111 изготовлена «ON Semiconductor» и имеет функцию, называемую «100-Tap Digitally Programmable Potentiometer». |
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Детали детали
Номер произв | CAT5111 |
Описание | 100-Tap Digitally Programmable Potentiometer |
Производители | ON Semiconductor |
логотип |
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CAT5111
100‐tap Digital
Potentiometer (POT)
with Buffered Wiper
Description
The CAT5111 is a single digital POT designed as an electronic
replacement for mechanical potentiometers. 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 CAT5111 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, RWB. The CAT5111 wiper is buffered by an op
amp that operates rail to rail. The wiper setting, stored in non-volatile
memory, is not lost when the device is powered down and is
automatically recalled when power is returned. The wiper can be
adjusted to test new system values without effecting the stored setting.
Wiper-control of the CAT5111 is accomplished with three input
control pins, CS, U/D, and INC. The INC input increments the wiper
in the direction which is determined by the logic state of the U/D input.
The CS input is used to select the device and also store the wiper
position prior to power down.
The digital POT can be used as a buffered voltage divider. For
applications where the potentiometer is used as a 2-terminal variable
resistor, please refer to the CAT5113. The buffered wiper of the
CAT5111 is not compatible with that application.
Features
100-position Linear Taper Potentiometer
Non-volatile EEPROM Wiper Storage; Buffered Wiper
Low Power CMOS Technology
Single Supply Operation: 2.5 V − 6.0 V
Increment Up/Down Serial Interface
Resistance Values: 10 kW, 50 kW and 100 kW
Available in PDIP, SOIC, TSSOP and MSOP Packages
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
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
Semiconductor Components Industries, LLC, 2013
June, 2013 − Rev. 20
1
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SOIC−8
V SUFFIX
CASE 751BD
MSOP−8
Z SUFFIX
CASE 846AD
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
PIN CONFIGURATIONS
INC
U/D
RH
GND
1
VCC
CS
RL
RWB
PDIP (L), SOIC (V), MSOP (Z)
1
CS
VINCCC
U/D
TSSOP (Y)
(Top Views)
RL
RGWNBD
RH
Pin Name
INC
U/D
RH
GND
RWB
RL
CS
VCC
PIN FUNCTION
Function
Increment Control
Up/Down Control
Potentiometer High Terminal
Ground
Buffered Wiper Terminal
Potentiometer Low Terminal
Chip Select
Supply Voltage
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
Publication Order Number:
CAT5111/D
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PDIP
RL4A
CAT5111LT
YMXXXX
CAT5111
SOIC
DEVICE MARKING INFORMATION
MSOP
RL4A
CAT5111VT
YMXXXX
AARL
YMP
TSSOP
A1RL
4YMXXX
R = Resistance:
AARL = CAT5111ZI−10−T3
2 = 10 kW
AAPT = CAT5111ZI−50−T3
4 = 50 kW
AAPX = CAT5111ZI−00−T3
5 = 100 kW
Y = Production Year (Last Digit)
L = Assembly Location
M = Production Month (1−9, A, B, C)
4 = Lead Finish − NiPdAu
P = Product Revision
A = Product Revision (Fixed as “A”)
CAT5111L = Device Code (PDIP)
CAT5111V = Device Code (SOIC)
T = Temperature Range (Industrial)
Y = Production Year (Last Digit)
M = Production Month (1−9, A, B, C)
XXXX = Last Four Digits of Assembly Lot Number
A1 = Device Code
R = Resistance:
2 = 10 kW
4 = 50 kW
5 = 100 kW
L = Assembly Location
4 = Lead Finish − NiPdAu
Y = Production Year (Last Digit)
M = Production Month (1−9, A, B, C)
XXX = Last Three Digits of
XXX = Assembly Lot Number
VCC
U/D
Control
INC and
Memory
CS
Power On Recall
+
–
GND
Figure 1. Functional Diagram
RH
RH
RWB
+
RWB
–
RL
RL
Figure 2. Electronic Potentiometer Implementation
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CAT5111
Pin Description
INC: Increment Control Input
The INC input (on the falling edge) 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 CS is low, any high-to-low
transition on INC will cause the wiper to move one
increment toward the RH terminal. When in a low state and
CS is low, any high-to-low transition on INC 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.
RWB: Wiper Potentiometer Terminal (Buffered)
RWB is the buffered wiper terminal of the potentiometer. Its
position on the resistor array is controlled by the control
inputs, INC, U/D and CS.
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.
CS: Chip Select
The chip select input is used to activate the control input of
the CAT5111 and is active low. When in a high state, activity
on the INC and U/D inputs will not affect or change the
position of the wiper.
Device Operation
The CAT5111 operates like a digitally controlled
potentiometer with RH and RL equivalent to the high and low
terminals and RWB equivalent to the mechanical
potentiometer’s wiper. There are 100 available 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, INC, U/D and CS. 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 INC
and CS inputs.
With CS set LOW the CAT5111 is selected and will
respond to the U/D and INC inputs. HIGH to LOW
transitions on INC will 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 CS transitions HIGH while the INC input
is also HIGH. When the CAT5111 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 INC set low, the CAT5111 may be de-selected 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.
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