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CAT5127 Datasheet(Folha de dados) 1 Page - Catalyst Semiconductor

Nome de Peças. CAT5127
descrição  32-Tap Digitally Programmable Potentiometer (DPP TM)
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Fbricantes  CATALYST [Catalyst Semiconductor]
Página de início  http://www.catalyst-semiconductor.com
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CAT5127, CAT5129
© 2006 Catalyst Semiconductor, Inc.
1
Doc. No. 2127 Rev. A
Characteristics subject to change without notice
32-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
32-position linear taper potentiometer
Non-volatile EEPROM wiper storage
Low standby current
Single supply operation: 2.5V – 5.5V
Increment Up/Down serial interface
Resistance values: 10kΩ, 50kΩ and 100kΩ
CAT5127 in tiny 8 lead 2mmx2.5mm TDFN and
MSOP packages
CAT5129 in the 6 lead TSOT23 package
APPLICATION
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 11.
DESCRIPTION
The CAT5127/CAT5129 are single digitally program–
mable potentiometers (DPP™) designed as a electro–
nic 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 CAT5127 contains a 32-tap series resistor array
connected between two terminals RH and RL. The
CAT5129 contains a 32-tap series resistor array
connected between two terminals RH and GND. An
up/down counter and decoder that are controlled by
three input pins, determines which tap is connected to
the wiper. The wiper setting, stored in nonvolatile me–
mory, 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
CAT5127/CAT5129
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 devices are used as two-terminal variable
resistors. DPPs bring variability and programmability
to a wide variety of applications including control,
parameter adjustments, and signal processing.
FUNCTIONAL DIAGRAM
(CS)
(INC)
(U/D)
Control
and
Memory
VCC
RH
RL
POR
CAT5127
GND
(CS)
(INC)
(U/D)
Control
and
Memory
VCC
RH
POR
CAT5129
GND




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