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MAX1233ETI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD
= AV
DD
= +2.7V to +3.6V (MAX1233), DV
DD
= AV
DD
= +4.75V to +5.25V (MAX1234), external reference V
REF
= 2.5V
(MAX1233), V
REF
= 4.096V (MAX1234); f
SCLK
= 10MHz, f
SAMPLE
= 50ksps, 12-bit mode, 0.1µF capacitor at REF, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL-TO-ANALOG CONVERTER
DC ACCURACY
Resolution 8Bits
Integral Linearity Error INL (Note 7) ±1.0 LSB
Differential Linearity Error DNL No missing codes ±1.0 LSB
Offset Error V
OS
(Note 8) ±1 ±25 mV
Offset Error Temperature
Coefficient
1 ppm/°C
Full-Scale Error Code = 255, no load 5 %
Full-Scale Error Temperature
Coefficient
Code = 255, no load ±10 ppm/°C
DYNAMIC PERFORMANCE
Voltage Output Slew Rate Positive and negative 0.4 V/µs
Output Settling Time 0.5LSB; 50kΩ and 50pF load (Note 9) 20 µs
Glitch Impulse Code 127 to 128 40 nV/s
Wake-Up Time From shutdown 50 µs
DAC OUTPUT
Internal DAC Reference V
REFDAC
(Note 10)
0.85
✕
AV
DD
0.9
✕
AV
DD
0.95
✕
AV
DD
V
Code = 255; 0 to 100µA 0.5
Output Load Regulation
Code = 0; 0 to 100µA 0.5
LSB
Output Resistance Power-down mode 1.0 MΩ
TOUCH-SCREEN CONTROLLER
Y+, X+ 7
On-Resistance
Y-, X- 9
Ω
Touch-Detection Internal Pullup
Resistance
X+ to AV
DD
1MΩ
KEYPAD CONTROLLER
Pullup Resistance C4, C3, C2, C1 (Note 11) 0.5 kΩ
Pulldown Resistance R4, R3, R2, R1 (Note 11) 16 kΩ
DIGITAL INTERFACE
DIGITAL INPUTS (SCLK, CS, DIN, R_, C_)
Input Voltage Low V
IL
0.3
✕
DV
DD
V
Input Voltage High V
IH
0.7
✕
DV
DD
V
Input Leakage Current I
L
±0.1 ±1µA
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD
= AV
DD
= +2.7V to +3.6V (MAX1233), DV
DD
= AV
DD
= +4.75V to +5.25V (MAX1234), external reference V
REF
= 2.5V
(MAX1233), V
REF
= 4.096V (MAX1234); f
SCLK
= 10MHz, f
SAMPLE
= 50ksps, 12-bit mode, 0.1µF capacitor at REF, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Capacitance C
IN
15 pF
DIGITAL OUTPUT (DOUT)
I
SINK
= 2mA 0.4
Output Voltage Low V
OL
I
SINK
= 4mA 0.8
V
Output Voltage High V
OH
I
SOURCE
= 1.5mA
DV
DD
-
0.5
V
DIGITAL OUTPUT (BUSY, PENIRQ, KEYIRQ, R_, C_)
Output Voltage Low V
OL
I
SINK
= 0.2mA 0.4 V
Output Voltage High V
OH
I
SOURCE
= 0.2mA
DV
DD
-
0.5
V
POWER REQUIREMENTS
MAX1233 2.7 3 3.6
Supply Voltage (Note 12)
AV
DD
/
DV
DD MAX1234 4.75 5 5.25
V
Idle; all blocks shut down 0.5 5
Only ADC on; f
SAMPLE
= 20ksps 150 500
Only DAC on; no load 150 230
Analog and Digital Supply
Current
I
AVDD
+
I
DVDD
Only internal reference on 670 900
µA
TIMING CHARACTERISTICS
SCLK Clock Period t
CP
100 ns
SCLK Pulse Width High t
CH
40 ns
SCLK Pulse Width Low t
CL
40 ns
DIN to SCLK Rise Setup t
DS
40 ns
SCLK Rise to DIN Hold t
DH
0ns
SCLK Fall to DOUT Valid t
DOV
C
LOAD
= 50pF 40 ns
CS Fall to DOUT Enabled t
DV
C
LOAD
= 50pF 45 ns
CS Rise to DOUT Disabled t
DOD
C
LOAD
= 50pF 40 ns
CS Fall to SCLK Rise t
CSS
40 ns
CS Fall to SCLK Ignored t
CSH
0ns
SCLK Rise to R_/C_ Data Valid t
GPO
C
LOAD
= 50pF (Note 13) 230 ns
CS Pulse Width High t
CSW
40 ns
Note 1: Tested at DV
DD
= AV
DD
= +2.7V (MAX1233), DV
DD
= AV
DD
= +5V (MAX1234).
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the offset and gain errors
have been removed.
Note 3: Offset nulled.
Note 4: Difference between TEMP1 and TEMP2; temperature in °K = (V
TEMP2
- V
TEMP1
) × 2680°K/V. No calibration is necessary.
Note 5: Temperature coefficient is -2.1mV/°C. Determine absolute temperature by extrapolating from a calibrated value.
Note 6: ADC performance is limited by the conversion noise floor, typically 300µV
P-P
. An external reference below 2.5V can
compromise the ADC performance.
Note 7: Guaranteed from code 5 to 255.
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD
= AV
DD
= +2.7V to +3.6V (MAX1233), DV
DD
= AV
DD
= +4.75V to +5.25V (MAX1234), external reference V
REF
= 2.5V
(MAX1233), V
REF
= 4.096V (MAX1234); f
SCLK
= 10MHz, f
SAMPLE
= 50ksps, 12-bit mode, 0.1µF capacitor at REF, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
Note 8: The offset value extrapolated from the range over which the INL is guaranteed.
Note 9: Output settling time is measured by stepping from code 5 to 255, and from code 255 to 5.
Note 10: Actual output voltage at full scale is 255/256 × V
REFDAC
.
Note 11: Resistance is open when configured as GPIO or in shutdown.
Note 12: AV
DD
and DV
DD
should not differ by more than 300mV.
Note 13: When configured as GPIO.
SCLK
DIN
DOUT
NOTE: TIMING NOT TO SCALE.
R_/C_
CS
t
CL
t
DH
t
DV
t
DS
t
CH
t
CSS
t
CP
t
CSH
t
CSW
t
CSH
t
CSS
t
DOD
t
DOV
t
GPO
Timing Diagram
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44

MAX1233ETI+T

Mfr. #:
Buy MAX1233ETI+T
Manufacturer:
Maxim Integrated
Description:
Touch Screen Controllers 4Ch uWire QSPI/SPI Touch Interface
Lifecycle:
New from this manufacturer.
Delivery:
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