CAT5136 Datasheet, PDF(3/11 Page) ON Semiconductor – Digital Potentiometers (POTs) with 128 Taps and I2C Interface

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CAT5136 Datasheet, PDF (3/11 Pages) ON Semiconductor – Digital Potentiometers (POTs) with 128 Taps and I2C Interface

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CAT5136, CAT5137, CAT5138

Table 4. POTENTIOMETERS CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)

Limits

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Potentiometer Resistance (10 kW)

Potentiometer Resistance (50 kW)

Potentiometer Resistance (100 kW)

Potentiometer Resistance Tolerance

Power Rating

RPOT

RTOL

25ï°C

100

ï±20

Wiper Current

Wiper Resistance

Voltage on RW, RH or RL

Resolution

ï±3

VDD = 3.3 V

200

VTERM

GND = 0 V; VDD = 2.7 V to +5.5 V

GND

VDD

RES

0.78

Integral Non-Linearity (Note 3)

INL

VW(n)(actual) â VW(n)(expected)

(Notes 6, 7)

ï±1

LSB

(Note 5)

Differential Non-Linearity (Note 4)

DNL

VW(n+1) â [VW(n)+LSB] (Notes 6, 7)

LSB

(Note 5)

Resistor Integral Non-Linearity

RINL

Rn â n*LSB (Notes 6, 8)

ï±2

LSB

(Note 5)

Resistor Differential Non-Linearity

RDNL

Rn â [Rnâ1 + LSB] (Notes 6, 8)

ï±1

LSB

(Note 5)

Temperature Coefficient of RPOT

TCRPOT

(Note 2)

ï±300

ppm/ï°C

Ratiometric Temperature Coefficient

TCRatio

(Note 2)

ppm/ï°C

Potentiometer Capacitances

CH/CL/CW (Note 2)

10/10/25

Frequency Response

RPOT

0.4

MHz

2. This parameter is tested initially and after a design or process change that affects the parameter.

3. Integral Non-Linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as

a potentiometer.

4. Differential Non-Linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a

potentiometer.

5. LSB = (RHM â RLM)/127; where RHM and RLM are the highest and lowest measured values on the wiper terminal.

6. n = 1, 2, ..., 127

7. VDD @ RH; VW measured @ RW with no load.

8. Rw and RL in the range of 0 V and VDD.

Table 5. D.C. ELECTRICAL CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)

Parameter

Symbol

Test Conditions

Min

Max

Power Supply Current

IDD

FSCL = 400 kHz, SDA Open,

200

(Write/Read)

VDD = 5.5 V, Input = GND

Standby Current

Input Leakage Current

Output Leakage Current

Input Low Voltage

Input High Voltage

Output Low Voltage (VDD = 3.0 V)

ISB(VDD)

ILI

ILO

VIL

VIH

VOL

VIN = GND or VDD , SDA = VDD

VIN = GND to VDD

VOUT = GND to VDD

IOL = 3 mA

â1

â0.3

VDD x 0.7

0.5

VDD x 0.3

VDD + 0.3

0.4

Units

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