CAT5251WI-00 datasheet(4/15 Pages) CATALYST

Part #	CAT5251WI-00

Description	Quad Digitally Programmable Potentiometer (DPP?? with 256 Taps and SPI Interface

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Manufacturer	CATALYST [Catalyst Semiconductor]

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CAT5251

4

Doc. No. MD-2017 Rev. F

Characteristics subject to change without notice

POTENTIOMETER CHARACTERISTICS

Over recommended operating conditions unless otherwise stated.

Symbol Parameter

Test Conditions

Min

Typ

Max

Units

RPOT

Potentiometer Resistance (-00)

100

kΩ

RPOT

Potentiometer Resistance (-50)

50

kΩ

Potentiometer Resistance Tolerance

±20

%

RPOT Matching

1

%

Power Rating

25°C, each pot

50

mW

IW

Wiper Current

±3

mA

IW = ±3mA @ VCC = 3V

200

300

Ω

RW

Wiper Resistance

IW = ±3mA @ VCC = 5V

100

150

Ω

VTERM

Voltage on any RH or RL Pin

VSS = 0V

GND

VCC

V

VN

Noise

(1)

nV/√Hz

Resolution

0.4

%

Absolute Linearity

(2)

RW(n)(actual) - R(n)(expected)

(5)

±1

LSB

(4)

Relative Linearity

(3)

RW(n+1) - [RW(n)+LSB]

(5)

±0.5

LSB

(4)

TCRPOT Temperature Coefficient of RPOT

(1)

±300

ppm/°C

TCRATIO Ratiometric Temp. Coefficient

(1)

20

ppm/°C

CH/CL/CW Potentiometer Capacitances

(1)

10/10/25

pF

fc

Frequency Response

RPOT = 50kΩ

(1)

0.4

MHz

Symbol Parameter

Test Conditions

Min

Typ

Max

Units

ICC1

Power Supply Current

fSCK = 2.5MHz, SO Open

VCC = 6V Inputs = GND

1

mA

ICC2

Power Supply Current

Non-volatile Write

fSCK = 2.5MHz, SO = Open

VCC = 6V Inputs = GND

5

mA

ISB

Standby Current (VCC = 5.0V)

VIN = GND or VCC; SO Open

1

µA

ILI

Input Leakage Current

VIN = GND to VCC

10

µA

ILO

Output Leakage Current

VOUT = GND to VCC

10

µA

VIL

Input Low Voltage

-1

VCC x 0.3

V

VIH

Input High Voltage

VCC x 0.7

VCC + 1.0

V

VOL1

Output Low Voltage (VCC = 3V)

IOL = 3mA

0.4

V

VOH1

Output High Voltage (VCC = 6V)

IOH = -1.6mA

VCC - 0.8

V

Notes:

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

(2) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a

potentiometer.

(3) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potenti-

ometer. It is a measure of the error in step size.

(4) LSB = RTOT / 255 or (RH - RL) / 255, single pot

(5) n = 0, 1, 2, ..., 255.

D.C. OPERATING CHARACTERISTICS

Over recommended operating conditions unless otherwise stated.

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