CAT5251 Datasheet, PDF (4/15 Pages) Catalyst Semiconductor – Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface

CAT5251
ABSOLUTE MAXIMUM RATINGS*
Temperature Under Bias .................. -55°C to +125°C
Storage Temperature ........................ -65°C to +150°C
Voltage on any Pin with
Respect to V_SS(1)(2) ................ -2.0V to +V_CC +2.0V
V_CC with Respect to Ground ................ -2.0V to +7.0V
Package Power Dissipation
Capability (T_A = 25°C) ................................... 1.0W
Lead Soldering Temperature (10 secs) ............ 300°C
*COMMENT
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. These are stress ratings only, and functional operation of the
device at these or any other conditions outside of those listed in the operational sections
of this specification is not implied. Exposure to any absolute maximum rating for extended
periods may affect device performance and reliability.
Recommended Operating Conditions:
V_CC = +2.5V to +6.0V
Temperature
Industrial
Min
-40°C
Max
85°C
Wiper Current .................................................... +6mA
Note:
(1) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns. Maximum DC voltage on output
pins is V_CC +0.5V, which may overshoot to V_CC +2.0V for periods of less than 20 ns.
(2) Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1V to V_CC +1V.
POTENTIOMETER CHARACTERISTICS
Over recommended operating conditions unless otherwise stated.
Symbol
RPOT
RPOT
IW
RW
RW
VTERM
VN
TCRPOT
TCRATIO
CH/CL/CW
fc
Parameter
Potentiometer Resistance (-00)
Potentiometer Resistance (-50)
Potentiometer Resistance
Tolerance
RPOT Matching
Power Rating
Wiper Current
Wiper Resistance
Wiper Resistance
Voltage on any RH or RL Pin
Noise
Resolution
Absolute Linearity ⁽²⁾
Relative Linearity ⁽³⁾
Temperature Coefficient of RPOT
Ratiometric Temp. Coefficient
Potentiometer Capacitances
Frequency Response
Test Conditions
25°C, each pot
IW = +3mA @ VCC =3V
IW = +3mA @ VCC = 5V
VSS = 0V
(1)
Rw(n)(actual)-R(n)(expected)(5)
Rw(n+1)-[Rw(n)+LSB]⁽⁵⁾
(1)
(1)
(1)
RPOT = 50kΩ⁽¹⁾
Min
Typ
Max
100
50
+20
1
50
+3
200
300
100
150
GND
VCC
0.4
+300
10/10/25
0.4
+1
+0.5
20
Units
kΩ
kΩ
%
%
mW
mA
Ω
Ω
V
nV/ Hz
%
LSB ⁽⁴⁾
LSB ⁽⁴⁾
ppm/°C
ppm/°C
pF
MHz
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Absolute linearity is utilitzed to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a potentiometer.
(3) 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.
(4) LSB = R_TOT / 255 or (R_H - R_L) / 255, single pot
(5) n = 0, 1, 2, ..., 255
Document No. 2017, Rev. D
4