CAT5271ZI-50-GT3 datasheet(3/14 Pages) ONSEMI

Part #	CAT5271ZI-50-GT3

Description	Dual 256?릔osition I2C Compatible Digital Potentiometers (POTs)

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CAT5271, CAT5273

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Table 3. ELECTRICAL CHARACTERISTICS: 50 kW and 100 kW Versions

VDD = 2.7 V to 5.5 V; VA = VDD; VB = 0 V; –40C < TA < +85C; unless otherwise noted. (Note 2)

Parameter

Test Conditions

Symbol

Min

Typ

(Note 3)

Max

Unit

DC CHARACTERISTICS − RHEOSTAT MODE

Resistor Differential Nonlinearity (Note 4)

RWB, VA = no connection (CAT5271)

R−DNL

−1

0.1

+1

LSB

Resistor Integral Nonlinearity (Note 4)

RWB, VA = no connection (CAT5271)

R−INL

−2

0.4

+2

LSB

Nominal Resistor Tolerance (Note 5)

TA = 25C

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

Voltage Range (Note 7)

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

Capacitance (Note 8) W

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 +25C and VDD = 5 V.

4. Resistor position nonlinearity error R−INL is the deviation from an ideal value measured between the maximum resistance and the

minimum resistance wiper positions. R−DNL 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.

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