MAX1233ETI+ Maxim Integrated Products, MAX1233ETI+ Datasheet - Page 14
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MAX1233ETI+
Manufacturer Part Number
MAX1233ETI+
Description
IC CNTRLR TOUCH 28-TQFN
Manufacturer
Maxim Integrated Products
Type
Resistiver
Datasheet
1.MAX1234ETIT.pdf
(44 pages)
Specifications of MAX1233ETI+
Touch Panel Interface
4-Wire
Number Of Inputs/keys
1, 4 x 4 Keypad
Resolution (bits)
8, 10, 12 b
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Data Rate/sampling Rate (sps, Bps)
50k
Voltage Reference
External, Internal
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-TQFN Exposed Pad
Applications
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
Internal protection diodes that clamp the analog input
to AV
from GND - 0.3V to AV
Analog inputs must not exceed AV
50mV or be lower than GND by more than 50mV for
accurate conversions. If an off-channel analog input
voltage exceeds the supplies, limit the input current to
50mA. All analog inputs are also fully ESD protected
Figure 3. Simplified Diagram of Analog Input Section
14
______________________________________________________________________________________
DD
and GND allow the analog input pins to swing
V
V
AUX1
AUX2
GND
BAT1
BAT2
X+
Y+
X-
Y-
7.5kΩ
7.5kΩ
TEMP2
2.5kΩ
BATTERY
DD
TEMP1
ON
+ 0.3V without damage.
Analog Input Protection
DD
2.5kΩ
BATTERY
by more than
ON
+AV
DD
V
REF
to ±8kV, using the Contact-Discharge method and
±15kV using the Air-Gap method specified in IEC-
1000-4-2.
The MAX1233/MAX1234 offer an internal voltage refer-
ence for the ADC that can be set to +1.0V or +2.5V. The
MAX1233/MAX1234 typically use the internal reference
for battery monitoring, temperature measurement, and for
REFERENCE
2.5V/1.0V
REF ON/OFF
MAX1233
MAX1234
+IN
-IN
Reference for ADC
CONVERTER
Internal Reference
+REF
-REF