DS1841T+TR datasheet(5/16 Pages) MAXIM

Part #	DS1841T+TR

Description	Temperature-Controlled, NV, I2C, Logarithmic Resistor

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Manufacturer	MAXIM [Maxim Integrated Products]

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Temperature-Controlled, NV, I2C,

Logarithmic Resistor

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

50

100

150

200

250

0

2.5

5.5

SDA = SCL = VCC

RH, RH, RW ARE FLOATING

SDA = SCL = VCC

RGND, RH, RW ARE FLOATING

UPDATE MODE BIT = 0

LUT MODE AND LUT ADDER MODE

UPDATE MODE BIT = 1

LUT MODE AND LUT ADDER MODE

UPDATE MODE BIT = 1

SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

80

60

40

20

0

-20

50

100

150

200

250

0

-40

100

SDA = SCL = VCC

RH, RH, RW ARE FLOATING

SDA = SCL = VCC = 5V

RGND, RH, RW ARE FLOATING

UPDATE MODE BIT = 0

LUT MODE AND LUT ADDER MODE

UPDATE MODE BIT = 1

LUT MODE AND LUT ADDER MODE

UPDATE MODE BIT = 1

SUPPLY CURRENT

vs. SCL FREQUENCY

SCL FREQUENCY (kHz)

300

200

100

50

100

150

200

250

0

400

SDA = SCL = VCC

RH, RH, RW ARE FLOATING

SDA = VCC = 5V

RGND, RH, RW ARE FLOATING

UPDATE MODE BIT = 0

LUT MODE AND LUT ADDER MODE

UPDATE MODE BIT = 1

LUT MODE AND LUT ADDER MODE

UPDATE MODE BIT = 1

WIPER RESISTANCE (RW)

vs. SETTING

SETTING (DEC)

125

100

75

50

25

5

10

15

20

25

0

SDA = SCL = VCC = 5V

WIPER CURRENT

vs. WIPER SETTING

WIPE SETTING (DEC)

100

75

50

25

0.4

0.8

1.2

1.6

0

125

RGND = 0V

RW OPEN

FORCE 1.25V ON RH AND

MEASURE CURRENT

RGND = 0V

RW OPEN

FORCE 1.25V ON RH AND

MEASURE CURRENT

VCC = 5V

SDA AND SCL REFERENCED TO 5V

VCC = 5V

SDA AND SCL REFERENCED TO 5V

RW TO RGND RESISTANCE

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

10

20

30

40

0

5.5

POR OCCURS

IVR IS LOADED

CONVERSIONS COMPLETE

LUT VALUE LOADED TO WR

CONVERSIONS COMPLETE

LUT VALUE LOADED TO WR

Typical Operating Characteristics

(VCC = +2.7V to +5.5V, TA = +25°C, unless otherwise noted.)

_______________________________________________________________________________________

5

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