CAT5171
www.onsemi.com
3
Table 4. ELECTRICAL CHARACTERISTICS: 50 kW and 100 kW Versions
V
DD
= 2.7 V to 5.5 V; V
A
= V
DD
; V
B
= 0 V; –40°C < T
A
< +85°C; unless otherwise noted.
Parameter
Test Conditions Symbol Min
Typ
(Note 3)
Max Unit
DC CHARACTERISTICS — RHEOSTAT MODE
Resistor Differential Nonlinearity (Note 4) R
WB
, V
A
= no connection R−DNL −1 ±0.1 +1 LSB
Resistor Integral Nonlinearity (Note 4) R
WB
, V
A
= no connection R−INL −2 ±0.4 +2 LSB
Nominal Resistor Tolerance (Note 5) T
A
= 25°C nR
AB
−20 +20 %
Resistance Temperature Coefficient V
AB
= V
DD
, Wiper = no connection nR
AB
/nT 100 ppm/°C
Wiper Resistance
V
DD
= 5 V, I
W
= ±3 mA
R
W
50 120
W
V
DD
= 3 V, I
W
= ±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 nV
W
/nT 100 ppm/°C
Full-Scale Error Code = 0xFF V
WFSE
−3 −1 0 LSB
Zero-Scale Error Code = 0x00 V
WZSE
0 1 3 LSB
RESISTOR TERMINALS
Voltage Range (Note 7)
V
A,B,W
GND V
DD
V
Capacitance (Note 8) A, B f = 1 MHz, measured to GND,
Code = 0 x 80
C
A,B
45 pF
Capacitance (Note 8) W f = 1 MHz, measured to GND,
Code = 0 x 80
C
W
60 pF
Common-Mode Leakage (Note 8) V
A
= V
B
= V
DD
/2 I
CM
1 nA
DIGITAL INPUTS
Input Logic High V
DD
= 5 V V
IH
0.7 x V
DD
V
Input Logic Low V
DD
= 5 V V
IL
0.3V
DD
V
Input Logic High V
DD
= 3 V V
IH
0.7 x V
DD
V
Input Logic Low V
DD
= 3 V V
IL
0.3V
DD
V
Input Current V
IN
= 0 V or 5 V I
IL
±1
mA
POWER SUPPLIES
Power Supply Range
V
DD
RANGE
2.7 5.5 V
Supply Current V
IH
= 5 V or V
IL
= 0 V I
DD
0.3 2
mA
Power Dissipation (Note 8) V
IH
= 5 V or V
IL
= 0 V, V
DD
= 5 V P
DISS
0.2 mW
Power Supply Sensitivity nV
DD
= +5 V ±10%, Code = Midscale PSS ±0.05 %/%
DYNAMIC CHARACTERISTICS (Notes 8 and 10)
Bandwidth –3 dB
R
AB
= 50 kW / 100 kW, Code = 0x80
BW 100/40 kHz
Total Harmonic Distortion V
A
=1 V rms, V
B
= 0 V,
f = 1 kHz, R
AB
= 10 kW
THD
W
0.05 %
V
W
Settling Time (50 kW/100 kW)
V
A
= 5 V, V
B
= 0 V, ±1 LSB error band t
S
2
ms
3. Typical specifications represent average readings at +25°C and V
DD
= 5 V.
4. Resistor position nonlinearity error R−INL is the deviation from an ideal value measured between the maximum resistance and the mini-
mum resistance wiper positions. R−DNL measures the relative step change from ideal between successive tap positions. Parts are guar-
anteed monotonic.
5. V
AB
= V
DD
, Wiper (V
W
) = 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. V
A
= V
DD
and V
B
= 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 V
DD
= 5 V.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
