DP7172

3

Table 4. ELECTRICAL CHARACTERISTICS: 50 k

and 100 k

Versions

Parameter

Test Conditions

Symbol

Min

Typ

(Note 2)

Max

Unit

DC CHARACTERISTICS — RHEOSTAT MODE

Resistor Differential Nonlinearity (Note 3)

R DNL

1

0.1

+1

LSB

Resistor Integral Nonlinearity (Note 3)

R INL

2

0.4

+2

LSB

Nominal Resistor Tolerance (Note 4)

20

+20

%

Resistance Temperature Coefficient

100

ppm/ C

Wiper Resistance

50

120

100

250

DC CHARACTERISTICS — POTENTIOMETER DIVIDER MODE

Resolution

N

8

Bits

Differential Nonlinearity (Note 5)

DNL

1

0.1

+1

LSB

Integral Nonlinearity (Note 5)

INL

1

0.4

+1

LSB

Voltage Divider Temperature Coefficient

Code = 0x80

100

ppm/ C

Full Scale Error

Code = 0xFF

3

1

0

LSB

Zero Scale Error

Code = 0x00

0

1

3

LSB

RESISTOR TERMINALS

Voltage Range (Note 6)

GND

V

Capacitance (Note 7) A, B

f = 1 MHz, measured to GND,

Code = 0 x 80

45

pF

Capacitance (Note 7) W

f = 1 MHz, measured to GND,

Code = 0 x 80

60

pF

Common Mode Leakage (Note 7)

1

nA

DIGITAL INPUTS

Input Logic High

V

Input Logic Low

V

Input Logic High

V

Input Logic Low

V

Input Current

1

A

Input Capacitance (Note 7)

5

pF

POWER SUPPLIES

Power Supply Range

2.7

5.5

V

Supply Current

0.3

2

A

Power Dissipation (Note 8)

0.2

mW

Power Supply Sensitivity

PSS

0.05

%/%

3. Resistor position nonlinearity error R INL is the deviation from an ideal value measured between the maximum resistance and the minim-

um resistance wiper positions. R DNL measures the relative step change from ideal between successive tap positions. Parts are guaran-

teed monotonic.

6. Resistor terminals A, B, W have no limitations on polarity with respect to each other.

7. Guaranteed by design and not subject to production test.