MAX1233-MAX1234 datasheet(3/44 Pages) MAXIM

Part #	MAX1233-MAX1234

Description	짹15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller

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Manufacturer	MAXIM [Maxim Integrated Products]

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3 / 44 page

±15kV ESD-Protected Touch-Screen

Controllers Include DAC and Keypad Controller

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(DVDD = AVDD = +2.7V to +3.6V (MAX1233), DVDD = AVDD = +4.75V to +5.25V (MAX1234), external reference VREF = 2.5V

(MAX1233), VREF = 4.096V (MAX1234); fSCLK = 10MHz, fSAMPLE = 50ksps, 12-bit mode, 0.1µF capacitor at REF, TA = -40

°C to

+85

°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Total Harmonic Distortion

THD

-84

dB

Spurious-Free Dynamic Range

SFDR

84

dB

Full-Power Bandwidth

-3dB point

0.5

MHz

Full-Linear Bandwidth

SINAD > 67dB

50

kHz

CONVERSION RATE

Internal Oscillator Frequency

8

11.5

MHz

Aperture Delay

30

ns

Aperture Jitter

<50

ps

Maximum Serial Clock Frequency

fSCLK

10

MHz

Duty Cycle

30

70

%

AUXILIARY ANALOG INPUTS (AUX1, AUX2)

Input Voltage Range

0VREF

V

Input Leakage Current

Channel not selected or conversion

stopped

±0.1

±1µA

Input Capacitance

34

pF

BATTERY MONITOR INPUTS (BAT1, BAT2)

Input Voltage Range

0.5

6.0

V

Sampling battery

10

k

Ω

Input Impedance

Battery monitor OFF

1

G

Ω

Accuracy

Internal reference

-3

+3

%

TEMPERATURE MEASUREMENT

Temperature Range

-40

+85

°C

Differential method (Note 4)

1.6

Resolution

Single measurement method (Note 5)

0.3

°C

Differential method (Note 4)

±3

Accuracy

Single measurement method (Note 5)

±2

°C

INTERNAL ADC REFERENCE

2.5V mode, TA = +25

°C

2.470

2.500

2.530

Reference Output Voltage

VREF

1.0V mode, TA = +25

°C

0.980

1.000

1.020

V

Output Tempco

TCVREF

60

ppm/

°C

Reference Output Impedance

Normal operation

250

Ω

Reference Short-Circuit Current

18

mA

EXTERNAL ADC REFERENCE (INTERNAL REFERENCE DISABLED, REFERENCE APPLIED TO REF)

Reference Input Voltage Range

(Note 6)

1.0

VDD

V

Input Impedance

CS = GND or VDD

1G

Ω

VREF = +2.5V at 50ksps (MAX1233)

5

10

VREF = +4.096V at 50ksps (MAX1234)

8

15

Input Current

Shutdown/between conversions

±0.1

µA

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MAX1233-MAX1234 Datasheet(PDF) 3 Page - Maxim Integrated Products

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