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

with Internal Reference and Temperature Sensor

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EXTERNAL REFERENCE (Internal reference disabled, reference applied to REF)

Reference Input Voltage Range

(Note 7)

1

V

Input Resistance

1G

Ω

13

40

2.5

µA

Input Current

±3

BATTERY MONITOR (BAT)

Input Voltage Range

06

V

Input Resistance

During acquisition

10

k

Ω

±2

Accuracy

Internal reference

±3

%

TEMPERATURE MEASUREMENT

Differential method (Note 8)

1.6

°C

Resolution

Single-conversion method

0.3

°C

Differential method (Note 8)

±2°C

Accuracy

Single-conversion method

±3°C

DIGITAL INPUTS (DCLK, CS, DIN)

Input High Voltage

V

Input Low Voltage

0.8

V

Input Hysteresis

100

mV

Input Leakage Current

±1

µA

Input Capacitance

15

pF

DIGITAL OUTPUT (DOUT, BUSY)

Output Voltage Low

0.4

V

Output Voltage High

V

PENIRQ Output Low Voltage

50k

0.8

V

Three-State Leakage Current

1

±10

µA

Three-State Output Capacitance

15

pF

POWER REQUIREMENTS

External reference

2.375

5.250

Supply Voltage

Internal reference

2.70

5.25

V

270

650

220

External

reference

150

µA

780

950

720

Supply Current

Internal

reference

650

µA

Shutdown Supply Current

3µA

Power-Supply Rejection Ratio

70

dB