cat5172 ON Semiconductor, cat5172 Datasheet

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cat5172

Manufacturer Part Number
cat5172
Description
256-position Spi Compatible Digital Potentiometer
Manufacturer
ON Semiconductor
Datasheet

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CAT5172
256-Position SPI
Compatible Digital
Potentiometer
potentiometer ideally suited for replacing mechanical potentiometers
and variable resistors. Like mechanical potentiometers, the CAT5172
has a resistive element, which can span V
anywhere between the power supply rails.
interface. Upon power−up, the wiper assumes a mid−span position and
may be repositioned anytime after the power is stable.
than 2 mA. This low operating current, combined with a small package
footprint, make the CAT5172 ideal for battery−powered portable
appliance.
Features
Typical Applications
© Semiconductor Components Industries, LLC, 2009
May, 2009 − Rev. 0
The CAT5172 is a 256−position digitally programmable linear taper
Wiper settings are controlled through an SPI−compatible digital
The CAT5172 operates from 2.7 V to 5.5 V, while consuming less
Chemical, and Optical Sensors
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, I
Wide Operating Temperature −40°C to +85°C
RoHS−compliant SOT−23 8−Lead (2.9 mm x 3 mm) Package
This is a Pb−Free Device
Potentiometer Replacement
Transducer Adjustment of Pressure, Temperature, Position,
RF Amplifier Biasing
Gain Control and Offset Adjustment
DD
2 mA max
CC
to Ground or float
1
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
1
GND
CLK
ADYM
V
ORDERING INFORMATION
DD
W
MARKING DIAGRAM
PIN CONNECTIONS
http://onsemi.com
AD = 50 kW
AE = 100 kW
Y = Production Year
Y =
M = Production Month
M =
CASE 527AK
(Last Digit)
TB SUFFIX
(1 − 9, A, B, C)
SOT23−8
(Top View)
1
Publication Order Number:
1
AEYM
A
B
CS
SDI
CAT5172/D

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cat5172 Summary of contents

Page 1

... 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 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 ...

Page 2

... Table 1. ORDERING INFORMATION Part Number Resistance CAT5172TBI−50GT3 50 kW CAT5172TBI−00GT3 100 kW †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Table 2. PIN FUNCTION DESCRIPTION Pin No. Pin Name ...

Page 3

Table 4. ELECTRICAL CHARACTERISTICS and 100 kW Versions ±10 ±10 Parameter DC CHARACTERISTICS — RHEOSTAT MODE Resistor Differential Nonlinearity (Note 3) Resistor Integral ...

Page 4

Table 4. ELECTRICAL CHARACTERISTICS and 100 kW Versions ±10 ±10 Parameter DYNAMIC CHARACTERISTICS (Notes 7 and 9) Bandwidth –3 dB Total Harmonic Distortion V Settling ...

Page 5

... SPI Interface Table 6. CAT5172 SERIAL DATA−WORD FORMAT MSB CS CLK SDI V1 V OUT V2 Figure 2. CAT5172 SPI Interface Timing Diagram (V 1 SDI (DATA IN CLK 0 t CSHO VOUT V W0 Figure 3. SPI Interface Detailed Timing Diagram ( ...

Page 6

DNL 0.01 0 −0.01 −0.02 −0.03 −0.04 −0. 128 160 TAP Figure 4. Differential Non−Linearity 5 120 100 5.6 V ...

Page 7

Figure 10. Wiper’s Transition from Position 0xFF to Position 0x00 Relative to the CS Disable − − −18 −24 −30 − 100 f (KHz) Figure ...

Page 8

... Decimal) which moves the wiper to its midscale position toggled CAT5172 transfers the contents of the input data register (0x00) to the wiper register moving the wiper to the bottom−most position (W = terminal B). ...

Page 9

... Each 8−bit serial word must be loaded starting with the MSB. The format of the word is shown in Table 6. Data loaded into CAT5172’s 8−bit serial input register is transferred to the internal Wiper register when the CS line returns to logic high. Extra MSB bits are ignored. ...

Page 10

... Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 10 MIN NOM MAX 0.90 1.45 0.00 0.15 0.90 1.10 1.30 0.60 0.80 0.28 0.38 0.08 0.22 2.90 BSC 2.80 BSC 1.60 BSC 0.65 BSC 0.30 0.45 0.60 0.60 REF 0.25 REF 0° 8° END VIEW ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative CAT5172/D ...

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