X9268 Datasheet, PDF (15/24 Pages) Intersil Corporation – Dual Supply/Low Power/256-Tap/2-Wire Bus

X9268
POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol
Parameter
R_TOTAL
R_TOTAL
End to End Resistance
End to EndResistance
End to end resistance tolerance
Power rating
I_W
Wiper current
R_W
Wiper resistance
R_W
Wiper resistance
V+
Voltage on V+ Pin
X9268
X9268-2.7
V-
Voltage on V- Pin
X9268
X9268 -2.7
V_TERM
Voltage on any V_H/R_H or V_L/R_L pin
Noise
Resolution ⁽⁴⁾
Absolute linearity ⁽¹⁾
Relative linearity ⁽²⁾
Temperature coefficient of resistance
Ratiometric Temperature Coefficient
C_H/C_L/C_W Potentiometer Capacitance
Limits
Min. Typ. Max.
100
50
±20
50
±3
250
150
+4.5
+5.5
+2.7
+5.5
-5.5
-4.5
-5.5
-2.7
V-
V+
-120
0.4
±1
±0.6
±300
±20
10/10/25
Unit
kΩ
kΩ
%
mW
mA
Ω
Ω
V
V
V
dBV
%
MI⁽³⁾
MI⁽³⁾
ppm/°C
ppm/°C
pF
Test Conditions
T version
U version
25°C, each pot
I_W = ± 1mA, V+ = 3V; V- = -3V
I_W = ± 1mA, V+ = 5V; V- = -5V
Ref: 1kHz
V_w(n)(actual) - V_{w(n)(expected)}
V_{w(n + 1)} - [V_{w(n) + MI}]
See Circuit #3
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
(2) 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.
(3) MI = RTOT / 255 or (R_H - R_L) / 255, single pot
(4) During power-up V_CC > V_H, V_L, and V_W.
(5) n = 0, 1, 2, …,255; m =0, 1, 2, …, 254.
15
FN8172.1
June 21, 2005