MXB7846EUE datasheet(6/23 Pages) MAXIM

Part #	MXB7846EUE

Description	2.375V to 5.25V, 4-Wire Touch-Screen Controller with Internal Reference and Temperature Sensor

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Manufacturer	MAXIM [Maxim Integrated Products]

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Typical Operating Characteristics (continued)

(VDD = 2.7V, VREF = 2.5VEXTERNAL, fDCLK = 2MHz, fSAMPLE = 125kHz, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless

otherwise noted.)

2.375V to 5.25V, 4-Wire Touch-Screen Controller

with Internal Reference and Temperature Sensor

6

_______________________________________________________________________________________

INTERNAL REFERENCE VOLTAGE

vs. TEMPERATURE

TEMPERATURE (°C)

80

65

50

35

20

5

-10

-25

2.1

2.2

2.3

2.4

2.5

2.6

2.0

-40

VDD = 2.7V

CL = 0.1µF

INTERNAL VOLTAGE REFERENCE

vs. TURN-ON TIME

TURN-ON TIME (µs)

1200

1000

800

600

400

200

0.5

1.0

1.5

2.0

2.5

0

CL = 1µF

(1060µs) 12-BIT SETTLING

INTERNAL VOLTAGE REFERENCE

vs. TURN-ON TIME

TURN-ON TIME (µs)

35

30

25

20

15

10

5

0.5

1.0

1.5

2.0

2.5

3.0

0

040

NO CAPACITOR

(30µs) 12-BIT SETTLING

REFERENCE CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

7.8

7.9

8.0

8.1

8.2

8.3

7.7

2.5

5.5

CL = 0.1µF

fSAMPLE = 125kHz

EXTERNAL REFERENCE

REFERENCE CURRENT vs. TEMPERATURE

TEMPERATURE (°C)

65

50

35

20

5

-10

-25

7.8

7.9

8.0

8.1

8.2

8.3

7.7

-40

80

VDD = 2.7V

CL = 0.1µF

fSAMPLE = 125kHz

EXTERNAL REFERENCE

REFERENCE CURRENT vs. SAMPLE RATE

SAMPLE RATE (kHz)

100

75

50

25

1

2

3

4

5

6

7

8

9

10

0

125

EXTERNAL REFERENCE

TEMP DIODE VOLTAGE

vs. TEMPERATURE

TEMPERATURE (°C)

80

65

35

50

-10

5

20

-25

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0

-40

TEMP1

TEMP2

TEMP0 DIODE VOLTAGE

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.2

4.7

4.2

3.7

3.2

586

587

588

589

590

585

2.7

TEMP0

TEMP1 DIODE VOLTAGE

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.2

4.7

4.2

3.7

3.2

699

700

701

702

703

704

705

698

2.7

TEMP1

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