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CAT5271 Datasheet, PDF (3/13 Pages) ON Semiconductor – Dual 256-Position I2C Compatible Digital Potentiometer | |||
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CAT5271
Table 4. ELECTRICAL CHARACTERISTICS: 50 kW and 100 kW Versions
VDD = 2.7 V to 5.5 V; VA = VDD; VB = 0 V; â40°C < TA < +85°C; unless otherwise noted. (Note 2)
Parameter
Test Conditions
Symbol
Typ
Min
(Note 3) Max
Unit
DC CHARACTERISTICS â RHEOSTAT MODE
Resistor Differential Nonlinearity (Note 4)
RWB, VA = no connection
RâDNL
â1
Resistor Integral Nonlinearity (Note 4)
RWB, VA = no connection
RâINL
â2
Nominal Resistor Tolerance (Note 5)
TA = 25°C
nRAB
â20
Resistance Temperature Coefficient
VAB = VDD, Wiper = no connection nRAB/nT
Wiper Resistance
VDD = 5 V, IW = ±3 mA
RW
VDD = 3 V, IW = ±3 mA
DC CHARACTERISTICS â POTENTIOMETER DIVIDER MODE
±0.1
+1
LSB
±0.4
+2
LSB
+20
%
100
ppm/°C
50
120
W
100
250
Resolution
Differential Nonlinearity (Note 6)
Integral Nonlinearity (Note 6)
Voltage Divider Temperature Coefficient
FullâScale Error
ZeroâScale Error
RESISTOR TERMINALS
Code = 0x80
Code = 0xFF
Code = 0x00
N
DNL
â1
INL
â1
nVW/nT
VWFSE
â3
VWZSE
0
8
Bits
±0.1
+1
LSB
±0.4
+1
LSB
100
ppm/°C
â1
0
LSB
1
3
LSB
Voltage Range (Note 7)
Capacitance (Note 8) A, B
f = 1 MHz, measured to GND,
Code = 0 x 80
VA,B,W
CA,B
GND
VDD
V
45
pF
Capacitance (Note 8) W
f = 1 MHz, measured to GND,
CW
Code = 0 x 80
60
pF
CommonâMode Leakage (Note 8)
DIGITAL INPUTS
VA = VB = VDD/2
ICM
1
nA
Input Logic High
Input Logic Low
Input Logic High
Input Logic Low
Input Current
POWER SUPPLIES
VDD = 5 V
VDD = 5 V
VDD = 3 V
VDD = 3 V
VIN = 0 V or 5 V
VIH
0.7 x VDD
VIL
VIH
0.7 x VDD
VIL
IIL
V
0.3VDD
V
V
0.3VDD
V
±1
mA
Power Supply Range
VDD RANGE
2.7
Supply Current
VIH = 5 V or VIL = 0 V
IDD
Power Dissipation (Note 8)
VIH = 5 V or VIL = 0 V, VDD = 5 V
PDISS
Power Supply Sensitivity
nVDD = +5 V ±10%, Code = Midscale PSS
DYNAMIC CHARACTERISTICS (Notes 8 and 10)
5.5
V
0.3
2
mA
0.2
mW
±0.05 %/%
Bandwidth â3 dB
RAB = 50 kW / 100 kW, Code = 0x80
BW
100/40
kHz
Total Harmonic Distortion
VA =1 V rms, VB = 0 V,
f = 1 kHz, RAB = 10 kW
THDW
0.05
%
VW Settling Time (50 kW/100 kW)
VA = 5 V, VB = 0 V, ±1 LSB error band
tS
2
ms
2. VA applies to both A1 and A2, VB applies to both B1 and B2.
3. Typical specifications represent average readings at +25°C and VDD = 5 V.
4. Resistor position nonlinearity error RâINL is the deviation from an ideal value measured between the maximum resistance and the minim-
um resistance wiper positions. RâDNL measures the relative step change from ideal between successive tap positions. Parts are guaran-
teed monotonic.
5. VAB = VDD, Wiper (VW) = no connect.
6. INL and DNL are measured at VW with the digital potentiometer configured as a potentiometer divider similar to a voltage output D/A con-
verter. VA = VDD and VB = 0 V. DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions.
7. Resistor terminals A, B, W have no limitations on polarity with respect to each other.
8. Guaranteed by design and not subject to production test.
9. Maximum terminal current is bounded by the maximum current handling of the switches, maximum power dissipation of the package, and
maximum applied voltage across any two of the A, B, and W terminals at a given resistance.
10. All dynamic characteristics use VDD = 5 V.
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