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PDF CAT5172 Data sheet ( Hoja de datos )

Número de pieza CAT5172
Descripción 256-position SPI Compatible Digital Potentiometer
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CAT5172
256‐position SPI
Compatible Digital
Potentiometer (POT)
The CAT5172 is a 256-position digital linear taper potentiometer
ideally suited for replacing mechanical potentiometers and variable
resistors. Like mechanical potentiometers, the CAT5172 has a
resistive element, which can span VCC to Ground or float anywhere
between the power supply rails.
Wiper settings are controlled through an SPI-compatible digital
interface. Upon power-up, the wiper assumes a mid-span position and
may be repositioned anytime after the power is stable.
The CAT5172 operates from 2.7 V to 5.5 V, while consuming less
than 2 mA. This low operating current, combined with a small package
footprint, make the CAT5172 ideal for battery-powered portable
appliance.
Features
256-position
End-to-End Resistance: 50 kW, 100 kW
SPI Compatible Interface
Power-on Preset to Midscale
Single Supply 2.7 V to 5.5 V
Low Temperature Coefficient 100 ppm/C
Low Power, IDD 2 mA max
Wide Operating Temperature 40C to +85C
SOT23 8-lead (2.9 mm 3 mm) Package
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
Potentiometer Replacement
Transducer Adjustment of Pressure, Temperature, Position,
Chemical, and Optical Sensors
RF Amplifier Biasing
Gain Control and Offset Adjustment
http://onsemi.com
SOT238
TB SUFFIX
CASE 527AK
MARKING DIAGRAM
ADYM
AEYM
11
AD = 50 kW
AE = 100 kW
Y = Production Year
Y = (Last Digit)
M = Production Month
M = (1 9, A, B, C)
PIN CONNECTIONS
W
VDD
GND
CLK
1
(Top View)
A
B
CS
SDI
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
Semiconductor Components Industries, LLC, 2013
July, 2013 Rev. 1
1
Publication Order Number:
CAT5172/D

1 page




CAT5172 pdf
CAT5172
SPI INTERFACE
Table 6. CAT5172 SERIAL DATAWORD FORMAT
B7 B6 B5 B4 B3 B2 B1 B0
D7
MSB
27
D6 D5 D4 D3 D2 D1
D0
LSB
20
CS
CLK
SDI
VOUT
V1
V2
1 234 5 678
DATA IN
D7 D6 D5 D4 D3 D2 D1 D0
Figure 2. CAT5172 SPI Interface Timing Diagram (VA = 5 V, VB = 0 V, VW = VOUT)
SDI 1
(DATA IN) 0
1
CLK
0
tCSHO
1
CS
0
VOUT
VW
VW0
Dx
tCH
Dx
tDS
tCSS
tCL
tDH tCS1
tCSH1
tCSW
tS
1 LSB
Figure 3. SPI Interface Detailed Timing Diagram (VA = 5 V, VB = 0 V, VW = VOUT)
http://onsemi.com
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