CAT5261_13 Datasheet, PDF (5/14 Pages) ON Semiconductor – Dual Digital Potentiometer (POT)

CAT5261
Table 4. POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Limits
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
R_POT
R_POT
Potentiometer Resistance (−00)
Potentiometer Resistance (−50)
Potentiometer Resistance Tolerance
100
kW
50
kW
20
%
R_POT Matching
Power Rating
25C, each pot
1
%
50
mW
I_W
R_W
R_W
V_TERM
VN
Wiper Current
Wiper Resistance
Wiper Resistance
Voltage on any R_H or R_L Pin
Noise
I_W = 3 mA @ V_CC = 3 V
I_W = 3 mA @ V_CC = 5 V
(Note 3)
3
mA
200
300
W
100
150
W
0
V_CC
V
nVHz
Resolution
0.4
%
Absolute Linearity (Note 4)
Rw(n)(actual)−R(n)(expected)
(Note 7)
1
LSB
(Note 6)
Relative Linearity (Note 5)
Rw(n+1)−[Rw(n)+LSB]
(Note 7)
0.2
LSB
(Note 6)
TC_RPOT
Temperature Coefficient of R_POT
(Note 3)
300
ppm/C
TC_RATIO
Ratiometric Temp. Coefficient
(Note 3)
20
ppm/C
C_H/C_L/C_W Potentiometer Capacitances
(Note 3)
10/10/25
pF
fc
Frequency Response
R_POT = 50 kW (Note 3)
0.4
MHz
1. The minimum DC input voltage is –0.5 V. During transitions, inputs may undershoot to –2.0 V for periods of less than 20 ns. Maximum DC
voltage on output pins is V_CC +0.5 V, which may overshoot to V_CC +2.0 V 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 –1 V to V_CC +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 = R_TOT / 255 or (R_H − R_L) / 255, single pot
7. n = 0, 1, 2, ..., 255
Table 5. D.C. OPERATING CHARACTERISTICS (V_CC = +2.5 V to +6.0 V, unless otherwise specified.)
Symbol
Parameter
Test Conditions
Min
I_CC1
I_CC2
I_SB
I_LI
I_LO
V_IL
V_IH
V_OL1
V_OH1
Power Supply Current
Power Supply Current
Non-volatile WRITE
Standby Current (V_CC = 5 V)
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage (V_CC = 3 V)
Output High Voltage
f_SCL = 400 kHz, SDA = Open
V_CC = 6 V, Inputs = GNDs
f_SCK = 400 kHz, SDA Open
V_CC = 6 V, Input = GND
V_IN = GND or V_CC, SDA = Open
V_IN = GND to V_CC
V_OUT = GND to V_CC
I_OL = 3 mA
I_OH = −1.6 mA
−1
V_CC x 0.7
V_CC – 0.8
Max
1
5
1
10
10
V_CC x 0.3
V_CC + 1.0
0.4
Units
mA
mA
mA
mA
mA
V
V
V
V
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