OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX1233ETI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44
General Description
The MAX1233/MAX1234 are complete PDA controllers in
5mm × 5mm, 28-pin QFN and TQFN packages. They fea-
ture a 12-bit analog-to-digital converter (ADC), low on-
resistance switches for driving resistive touch screens, an
internal +1.0V/+2.5V or external reference, ±2°C accu-
rate, on-chip temperature sensor, direct +6V battery mon-
itor, keypad controller, 8-bit digital-to-analog converter
(DAC), and a synchronous serial interface. Each of the
keypad controllers’ eight row and column inputs can be
reconfigured as general-purpose parallel I/O pins (GPIO).
All analog inputs are fully ESD protected, eliminating the
need for external TransZorb
™
devices.
The MAX1233/MAX1234 offer programmable resolution
and sampling rates. Interrupts from the devices alert the
host processor when data is ready, when the screen is
touched, or a key press is detected. Software-
configurable scan control and internal timers give the user
flexibility without burdening the host processor. These
devices consume only 260µA at the maximum sampling
rate of 50ksps. Supply current falls to below 50µA for
sampling rates of 10ksps. The MAX1233/MAX1234 are
guaranteed over the -40°C to +85°C temperature range.
Applications
Personal Digital Assistants
Pagers
Touch-Screen Monitors
Cellular Phones
MP3 Players
Portable Instruments
Point-of-Sale Terminals
Features
♦ ESD-Protected Analog Inputs
±15kV IEC 1000-4-2 Air-Gap Discharge
±8kV IEC 1000-4-2 Contact Discharge
♦ Single-Supply Operation
+2.7V to +3.6V (MAX1233)
+4.75V to +5.25V (MAX1234)
♦ 4-Wire Touch-Screen Interface
♦ Internal +1.0V/+2.5V Reference or External
Reference (+1.0V to AV
DD
)
♦ SPI
™
/QSPI
™
/MICROWIRE
™
-Compatible 10MHz
Serial Interface
♦ 12-Bit, 50ksps ADC Measures
Resistive Touch-Screen Position and Pressure
Two Auxiliary Analog Inputs
Two Battery Voltages (0.5V to 6V)
On-Chip Temperature
♦ 8-Bit DAC for LCD Bias Control
♦ 4 × 4 Keypad Programmable Controller Offers Up
to Eight GPIO Pins
♦ Automatic Detection of Screen Touch, Key Press,
and End of Conversion
♦ Programmable 8-, 10-, 12-Bit Resolution
♦ Programmable Conversion Rates
♦ AutoShutdown
™
Between Conversions
♦ Low Power
260µA at 50ksps
50µA at 10ksps
6µA at 1ksps
0.3µA Shutdown Current
♦ 28-Pin 5mm × 5mm QFN and TQFN Packages
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
________________________________________________________________
Maxim Integrated Products
1
28
27
26
25
24
23
22
SCLK
CS
DIN
DOUT
PENIRQ
8
9
10
11
12
13
14
*BAT1
*BAT2
*AUX1
*AUX2
REF
DACOUT
R4
15
16
17
18
19
20
21
R3
*PIN INCLUDES 8kV/15kV ESD PROTECTION.
R2
R1
C1
C2
C3
C4
7
6
5
4
3
2
1
GND
*Y-
*X-
*Y+
*X+
AV
DD
DV
DD
MAX1233
MAX1234
QFN/TQFN
TOP VIEW
KEYIRQ
BUSY
Pin Configuration
Ordering Information
19-2512; Rev 4; 3/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX1233EGI -40°C to +85°C 28 QFN (5mm x 5mm)
MAX1233ETI -40°C to +85°C 28 TQFN (5mm x 5mm)
MAX1234EGI -40°C to +85°C 28 QFN (5mm x 5mm)
MAX1234ETI -40°C to +85°C 28 TQFN (5mm x 5mm)
TransZorb is a trademark of General Semiconductor Industries, Inc.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
AV
DD
to GND............................................................-0.3V to +6V
DV
DD
to AV
DD
.......................................................-0.3V to +0.3V
Digital Inputs/Outputs to GND .................-0.3V to (DV
DD
+ 0.3V)
X+, Y+, X-, Y-, AUX1, AUX2,
and REF to GND ..................................-0.3V to (AV
DD
+ 0.3V)
BAT1, BAT2 to GND .................................................-0.3V to +6V
Maximum ESD per IEC 1000-4-2 (per MIL STD-883 HBM)
X+, X-, Y+, Y-, AUX1, AUX2, BAT1, BAT2......................±15kV
All Other Pins.....................................................................±2.5kV
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QFN (derate 28.5mW/°C above +70°C) .................2W
28-Pin TQFN (derate 28.5mW/°C above +70°C) ...............2W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG-TO-DIGITAL CONVERTER
DC ACCURACY (Note 1)
Resolution Software-programmable 8/10/12 bit 12 Bits
No Missing Codes 11 Bits
12-bit mode ±0.8 ±2
Relative Accuracy (Note 2) INL
10-bit and 8-bit modes ±0.5
LSB
12-bit mode ±0.8 ±2
Differential Nonlinearity DNL
10-bit and 8-bit modes ±0.5
LSB
12-bit mode ±0.5 ±4
Offset Error
10-bit and 8-bit modes ±0.5
LSB
12-bit mode ±0.5 ±4
10-bit mode ±0.5Gain Error (Note 3)
8-bit mode ±0.5
LSB
12-bit mode ±2
Total Unadjusted Error TUE
10-bit and 8-bit modes ±1
LSB
Offset Temperature Coefficient ±0.4 ppm/°C
Gain Temperature Coefficient ±0.4 ppm/°C
Channel-to-Channel Offset ±0.1 LSB
Channel-to-Channel Gain
Matching
±0.1 LSB
Noise Including internal V
REF
50 µV
RMS
MAX1233
AV
DD
= DV
DD
= +2.7V to +3.6V
±0.4
Power-Supply Rejection PSR
Full-scale
input
MAX1234
AV
DD
= DV
DD
= +5V ±5%
±0.3
mV
DYNAMIC SPECIFICATIONS (1kHz SINE WAVE, V
IN
= 2.5V
P-P
FOR MAX1233, V
IN
= 4.096V
P-P
FOR MAX1234,
50ksps,
f
SCLK
= 10MHz)
Signal-to-Noise Plus Distortion SINAD 69 dB
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
_______________________________________________________________________________________ 3
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
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 f
SCLK
10 MHz
Duty Cycle 30 70 %
AUXILIARY ANALOG INPUTS (AUX1, AUX2)
Input Voltage Range 0V
REF
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 kΩ
Input Impedance
Battery monitor OFF 1 GΩ
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, T
A
= +25°C 2.470 2.500 2.530
Reference Output Voltage V
REF
1.0V mode, T
A
= +25°C 0.980 1.000 1.020
V
Output Tempco TCV
REF
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 V
DD
V
Input Impedance CS = GND or V
DD
1GΩ
V
REF
= +2.5V at 50ksps (MAX1233) 5 10
V
REF
= +4.096V at 50ksps (MAX1234) 8 15
Input Current
Shutdown/between conversions ±0.1
µA
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:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet