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PDF CAT5120 Data sheet ( Hoja de datos )
| Número de pieza | CAT5120 | |
| Descripción | 16-Tap MiniPot Digitally Programmable Potentiometers | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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CAT5120, CAT5121,
CAT5122
16‐tap Digital
Potentiometers (POTs)
with 2‐wire Interface
Description
CAT5120/5121/5122 linear-taper digital POTs perform the same
function as a mechanical potentiometer or a variable resistor. These
devices consist of a fixed resistor and a wiper contact with 16-tap
points that are digitally controlled through a 2-wire up/down serial
interface.
The CAT5120 is configured as a potentiometer. The CAT5121 and
CAT5122 are configured as variable resistors. See Pin Configurations
for part functionality.
Two resistance values are available: 10 kW and 50 kW. These are
available in space-saving 5-pin and 6-pin SC−70 and SOT−23
packages.
Features
0.3 mA Ultra-low Standby Current
Single-supply Operation: 2.7 V to 5.5 V
Glitchless Switching between Resistor Taps
Power-on Reset to Midscale
2-wire Up/Down Serial Interface
Resistance Values: 10 kW, 50 kW
Available in SC−70 and SOT−23 Packages
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
LCD Screen Adjustment
Volume Control
Mechanical Potentiometer Replacement
Gain Adjustment
Line Impedance Matching
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SC−70
SD SUFFIX
CASE 419AD
SOT−23
TB SUFFIX
CASE 527AJ
SC−70
SD SUFFIX
CASE 419AC
SOT−23
TB SUFFIX
CASE 527AH
PIN CONFIGURATIONS
SC−70
SOT−23
VDD 1
6H
GND 2
5W
CAT5120
U/D 3
4 CS
SC−70
SOT−23
VDD 1
6H
GND 2
5L
CAT5121
U/D 3
4 CS
SC−70
SOT−23
VDD 1
5H
GND 2
CAT5122
U/D 3
4 CS
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
Semiconductor Components Industries, LLC, 2013
July, 2013 − Rev. 8
1
Publication Order Number:
CAT5120/D
1 page  
CAT5120, CAT5121, CAT5122
FUNCTIONAL DESCRIPTION
The CAT5120/5121/5122 consist of a fixed resistor and a
wiper contact with 16-tap points that are digitally controlled
through a 2-wire up/down serial interface. Two end-to-end
resistance values are available: 10 kW and 50 kW.
The CAT5120 is designed to operate as a potentiometer.
In this configuration, the low terminal of the resistor array
is connected to ground (pin 2).
The CAT5122 performs as a variable resistor. In this
device, the wiper terminal and high terminal of the resistor
array is connected at pin 5. The CAT5121 is a similar
variable resistor, except the low terminal is connected to
pin 5.
low, the part will go into increment mode if U/D input is
high, and into decrement mode when U/D input is low. Once
the mode is set, the device will remain in that mode until CS
goes high again. A low-to-high transition at the U/D pin will
increment or decrement the wiper position depending on the
current mode (Figures 7 and 8).
When the CS input transitions to high (serial interface
inactive), the value of the counter is stored and the wiper
position is maintained.
Note that when the wiper reaches the maximum (or
minimum) tap position, the wiper will not wrap around to the
minimum (or maximum) position.
Digital Interface Operation
The devices have two modes of operation when the serial
interface is active: increment and decrement mode. The
serial interface is only active when CS is low.
The CS and U/D inputs control the position of the wiper
along the resistor array. When CS transitions from high to
Power-on Reset
All parts in this family feature power-on reset (POR)
circuitry that sets the wiper position to midscale at
power-up. By default, the chip is in the increment mode.
CS
tCU
tIL
U/D
tCI tIH
tSETTLE
W
Note: “W” is not a digital signal. It represents wiper transitions.
Figure 7. Serial Interface Timing Diagram, Increment Mode
tIC
tSETTLE
CS
tCU
U/D
tIH
tIC
tIL
W tCI
tSETTLE
tSETTLE
Note: “W” is not a digital signal. It represents wiper transitions.
Figure 8. Serial Interface Timing Diagram, Decrement Mode
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5
5 Page 
D
e
PIN #1 IDENTIFICATION
TOP VIEW
θ1
CAT5120, CAT5121, CAT5122
PACKAGE DIMENSIONS
SOT−23, 5 Lead
CASE 527AH
ISSUE O
E1 E
SYMBOL
A
A1
A2
b
c
D
E
E1
e
L
L1
L2
θ
θ1
θ2
MIN
0.90
0.00
0.90
0.30
0.08
0.30
0°
5°
5°
NOM
1.15
2.90 BSC
2.80 BSC
1.60 BSC
0.95 BSC
0.45
0.60 REF
0.25 REF
4°
10°
10°
MAX
1.45
0.15
1.30
0.50
0.22
0.60
8°
15°
15°
A2 A
b
θ2 A1
SIDE VIEW
Notes:
(1) All dimensions in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MO-178.
θ
L1 L
L2
END VIEW
c
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,
copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC
reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without
limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC
does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for
surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where
personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and
its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly,
any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture
of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
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11
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
CAT5120/D
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CAT5120.PDF ] | |
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