TSC2004 datasheet(3/54 Pages) BURR-BROWN

Numer części	TSC2004

Szczegółowy opis	1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with I2C??Interface

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Producent	BURR-BROWN [Burr-Brown (TI)]

Strona internetowa	http://www.burr-brown.com

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ELECTRICAL CHARACTERISTICS

TSC2004

SBAS408A – JUNE 2007 – REVISED AUGUST 2007

At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD

(1) = +1.2V to +3.6V, unless otherwise noted.

TSC2004

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

AUXILIARY ANALOG INPUT

Input voltage range

0

VREF

V

Input capacitance

12

pF

Input leakage current

–1

+1

μA

A/D CONVERTER

Resolution

Programmable: 10 or 12 bits

12

Bits

No missing codes

12-bit resolution

11

Bits

Integral linearity

–4

–0.8 to +1.4

+4

LSB(2)

Differential linearity

–2

–0.6 to +0.7

+4

LSB

TSC2004IRTJ

0

2.2

5

LSB

SNSVDD = 1.6V, VREF = 1.6V,

Offset error

High-Speed mode, filter off

TSC2004IYZK

2.2

LSB

TSC2004IRTJ

–3

0.1

+3

SNSVDD = 1.6V, VREF = 1.6V,

Gain error

LSB

High-Speed mode, filter off

TSC2004IYZK

0.1

REFERENCE INPUT

VREF range

1.2

SNSVDD

V

Non-cont. AUX mode, SNSVDD = VREF = 1.6V,

VREF input current drain

1.2

μA

TA = +25°C, fADC = 2MHz, High-Speed mode

Input impedance

A/D converter not converting

1

G

Ω

TOUCH SENSORS

PENIRQ Pull-Up Resistor,

TA = +25°C, SNSVDD = VREF = 1.6V

47

k

Ω

RIRQ

Switch

Y+, X+

TA = +25°C, SNSVDD = VREF = 1.6V

6

Ω

On-

Y–, X–

TA = +25°C, SNSVDD = VREF = 1.6V

5

Ω

Resistance

Switch drivers drive current(3)

100ms duration

50

mA

INTERNAL TEMPERATURE SENSOR

Temperature range

–40

+85

°C

SNSVDD = 1.6V

0.3

°C/LSB

Differential method(4)

SNSVDD = 3V

1.6

°C/LSB

Resolution

SNSVDD = 1.6V

0.3

°C/LSB

TEMP1(5)

SNSVDD = 3V

1.6

°C/LSB

SNSVDD = 1.6V

±3

°C/LSB

Differential method(4)

SNSVDD = 3V

±2

°C/LSB

Accuracy

SNSVDD = 1.6V

±3

°C/LSB

TEMP1(5)

SNSVDD = 3V

±2

°C/LSB

INTERNAL OSCILLATOR

SNSVDD = 1.2V, TA = +25°C

3.3

MHz

Clock frequency, fOSC

SNSVDD = 1.6V

3.6

3.9

4.3

MHz

SNSVDD = 3.0V, TA = +25°C

4.1

MHz

SNSVDD = 1.2V

0.118

%/

°C

Frequency drift

SNSVDD = 1.6V

–0.018

%/

°C

SNSVDD = 3.0V

–0.032

%/

°C

(1)

I/OVDD must be

≤ SNSVDD.

(2)

LSB means Least Significant Bit. With VREF = +2.5V, one LSB is 610μV.

(3)

Assured by design, but not tested. Exceeding 50mA source current may result in device degradation.

(4)

Difference between TEMP1 and TEMP2 measurement; no calibration necessary.

(5)

Temperature drift is –2.1mV/

°C.

3

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