CAT5271, CAT5273
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3
Table 3. ELECTRICAL CHARACTERISTICS: 50 kW and 100 kW Versions
VDD = 2.7 V to 5.5 V; VA = VDD; VB = 0 V; –40C < TA < +85C; unless otherwise noted. (Note 2) Parameter
Test Conditions
Symbol
Min
Typ
Max
Unit
DC CHARACTERISTICS RHEOSTAT MODE
Resistor Differential Nonlinearity (Note
4)RWB, VA = no connection (CAT5271)
RDNL
1
0.1
+1
LSB
Resistor Integral Nonlinearity (Note
4)RWB, VA = no connection (CAT5271)
RINL
2
0.4
+2
LSB
Nominal Resistor Tolerance (Note
5)TA = 25C
nRAB
20
+20
%
Resistance Temperature Coefficient
VAB = VDD, Wiper = no connection
nRAB/nT
100
ppm/C
Wiper Resistance
VDD = 5 V, IW = 3 mA
RW
50
120
W
VDD = 3 V, IW = 3 mA
100
250
DC CHARACTERISTICS POTENTIOMETER DIVIDER MODE
Resolution
N
8
Bits
Differential Nonlinearity (Note
6)DNL
1
0.1
+1
LSB
Integral Nonlinearity (Note
6)INL
1
0.4
+1
LSB
Voltage Divider Temperature Coefficient
Code = 0x80
nVW/nT
100
ppm/C
Full-scale Error
Code = 0xFF
VWFSE
3
1
0
LSB
Zero-scale Error
Code = 0x00
VWZSE
0
1
3
LSB
RESISTOR TERMINALS
VA,B,W
GND
VDD
V
Capacitance (Note
8) A, B
f = 1 MHz, measured to GND,
Code = 0 x 80
CA,B
45
pF
f = 1 MHz, measured to GND,
Code = 0 x 80
CW
60
pF
Common-mode Leakage (Note
8)VA = VB = VDD/2
ICM
1
nA
DIGITAL INPUTS
Input Logic High
VDD = 5 V
VIH
0.7 x VDD
V
Input Logic Low
VDD = 5 V
VIL
0.3VDD
V
Input Logic High
VDD = 3 V
VIH
0.7 x VDD
V
Input Logic Low
VDD = 3 V
VIL
0.3VDD
V
Input Current
VIN = 0 V or 5 V
IIL
1
mA
POWER SUPPLIES
Power Supply Range
VDD RANGE
2.7
5.5
V
Supply Current
VIH = 5 V or VIL = 0 V
IDD
0.3
2
mA
Power Dissipation (Note
8)VIH = 5 V or VIL = 0 V, VDD = 5 V
PDISS
0.2
mW
Power Supply Sensitivity
nVDD = +5 V 10%, Code = Midscale
PSS
0.05
%/%
DYNAMIC CHARACTERISTICS (Notes
8 and
10)
Bandwidth –3 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 +25C and VDD = 5 V.
4. Resistor position nonlinearity error RINL is the deviation from an ideal value measured between the maximum resistance and the
minimum resistance wiper positions. RDNL measures the relative step change from ideal between successive tap positions. Parts are
guaranteed monotonic.
5. CAT5271: VAB = VDD, Wiper (VW) = no connect. CAT5273: VWB = VDD.
6. INL and DNL are measured at VW with the digital potentiometer configured as a potentiometer divider similar to a voltage output D/A
converter. 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.