MAX1233ETI+T Maxim Integrated Products, MAX1233ETI+T Datasheet - Page 11

• Manufacturer Part Number: MAX1233ETI+T
• Description: IC CNTRLR TOUCH 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Resistiver

Specifications of MAX1233ETI+T

• 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

(AV
10MHz (50% duty cycle), f
Controllers Include DAC and Keypad Controller
DD
PIN
10*
11*
12
13
14
15
16
17
18
3*
4*
5*
6*
8*
9*
1
2
7
= DV
DD
= 3V (MAX1233) or 5V (MAX1234), external V
DACOUT
NAME
DV
AV
AUX1
AUX2
BAT1
BAT2
750
700
650
600
550
GND
REF
______________________________________________________________________________________
X+
Y+
C1
R4
R3
R2
R1
X-
Y-
DD
DD
2.7
ADC REFERENCE SUPPLY CURRENT
SAMPLE
vs. ANALOG SUPPLY VOLTAGE
3.2
Positive Digital Supply Voltage, +2.7V to +3.6V for MAX1233, +4.75V to +5.25V for MAX1234. Bypass
with a 0.1µF capacitor. Must be within 300mV of AV
Positive Analog Supply Voltage, +2.7V to +3.6V for MAX1233, +4.75V to +5.25V for MAX1234.
Bypass with a 0.1µF capacitor. Must be within 300mV of DV
X+ Position Input
Y+ Position Input
X- Position Input
Y- Position Input
Analog and Digital Ground
Battery Monitoring Input 1. Measures battery voltages up to 6V.
Battery Monitoring Input 2. Measures battery voltages up to 6V.
Auxiliary Analog Input 1 to ADC. Measures analog voltages from zero to V
Auxiliary Analog Input 2 to ADC. Measures analog voltages from zero to V
Voltage Reference Output/Input. Reference voltage for analog-to-digital conversion. In internal
reference mode, the reference buffer provides a 2.5V or 1.0V nominal output. In external reference
mode, apply a reference voltage between 1.0V and AV
capacitor in the external reference mode only.
DAC Voltage Output; 0.9 × AV
Keypad Row 4. Can be reconfigured as GPIO3.
Keypad Row 3. Can be reconfigured as GPIO2.
Keypad Row 2. Can be reconfigured as GPIO1.
Keypad Row 1. Can be reconfigured as GPIO0.
Keypad Column 1. Can be reconfigured as GPIO4.
±15kV ESD-Protected Touch-Screen
= 20ksps, C
3.7
AV
DD
(V)
4.2
LOAD
4.7
Typical Operating Characteristics (continued)
= 50pF, 0.1µF capacitor at REF, T
5.2
DD
REF
Full Scale
= +2.5V (MAX1233), external V
FUNCTION
750
700
650
600
550
-40
DD
-25 -10
.
DD
REFERENCE SUPPLY CURRENT
A
. Bypass REF to GND with a 0.1µF
= +25°C, unless otherwise noted.)
DD
vs. TEMPERATURE
TEMPERATURE (°C)
.
5
20
REF
35
= +4.096V (MAX1234), f
REF
REF
50
Pin Description
.
.
65
80
SCLK
11
=