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| CAT5270 Datasheet, PDF (3/10 Pages) ON Semiconductor – Dual Digitally Programmable Potentiometers (DPP) with 256 Taps & I2C Compatible Interface | |||
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CAT5270
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
Temperature Under Bias
â55 to +125
°C
Storage Temperature
â65 to +150
°C
Voltage on Any Pin with Respect to VSS (Note 1)
VCC with Respect to Ground
Package Power Dissipation Capability (TA = 25°C)
Lead Soldering Temperature (10 sec)
â2.0 to +VCC + 2.0
V
â2.0 to +6.0
V
1.0
W
300
°C
Wiper Current
±6
mA
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The minimum DC input voltage is â0.5 V. During transitions, inputs may undershoot to â2.0 V for periods of less than 20 ns. Maximum DC
voltage on output pins is VCC +0.5 V, which may overshoot to VCC +2.0 V for periods of less than 20 ns.
Table 3. RECOMMENDED OPERATING CONDITIONS
Parameters
VCC
Industrial Temperature
Ratings
+2.5 to +5.5
â40 to +85
Units
V
°C
Table 4. POTENTIOMETER CHARACTERISTICS (VCC = +2.5 V to +5.5 V, unless otherwise specified.)
Limits
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
RPOT
RPOT
Potentiometer Resistance (100 kW)
Potentiometer Resistance (50 kW)
Potentiometer Resistance Tolerance
100
kW
50
kW
±20
%
RPOT Matching
Power Rating
25°C, each pot
1
%
50
mW
IW
RW
RW
VTERM
Wiper Current
Wiper Resistance
Wiper Resistance
Voltage on any RH or RL Pin
Resolution
IW = ±3 mA @ VCC = 3 V
IW = ±3 mA @ VCC = 5 V
VSS = 0 V
±3
mA
200
300
W
75
150
W
VSS
VCC
V
0.4
%
Absolute Linearity (Note 4)
Rw(n)(actual) â R(n)(expected) (Note 7)
±1
LSB
(Note 6)
Relative Linearity (Note 5)
Rw(n+1) â R[w(n)+LSB] (Note 7)
±0.2
LSB
(Note 6)
TCRPOT Temperature Coefficient of RPOT
(Note 3)
±100
ppm/°C
TCRATIO Ratiometric Temp. Coefficient
(Note 3)
20
ppm/°C
CH/CL/CW Potentiometer Capacitances
(Note 3)
10/10/25
pF
fc
Frequency Response
RPOT = 50 kW (Note 3)
0.4
MHz
2. Latchâup protection is provided for stresses up to 100 mA on address and data pins from â1 V to VCC +1 V.
3. This parameter is tested initially and after a design or process change that affects the parameter.
4. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
5. Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer.
It is a measure of the error in step size.
6. LSB = RTOT / 255 or (RH â RL) / 255, single pot
7. n = 0, 1, 2, ..., 255
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