MAX1234ETI+T Maxim Integrated Products, MAX1234ETI+T Datasheet - Page 4

• Manufacturer Part Number: MAX1234ETI+T
• Description: IC CNTRLR TOUCH 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Resistiver

Specifications of MAX1234ETI+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: Internal
• Voltage - Supply: 4.75 V ~ 5.25 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
ELECTRICAL CHARACTERISTICS (continued)
(DV
(MAX1233), V
+85°C, unless otherwise noted. Typical values are at T
4
DC ACCURACY
Resolution
Integral Linearity Error
Differential Linearity Error
Offset Error
Offset Error Temperature
Coefficient
Full-Scale Error
Full-Scale Error Temperature
Coefficient
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Output Settling Time
Glitch Impulse
Wake-Up Time
DAC OUTPUT
Internal DAC Reference
Output Load Regulation
Output Resistance
On-Resistance
Touch-Detection Internal Pullup
Resistance
Pullup Resistance
Pulldown Resistance
DIGITAL INPUTS (SCLK, CS, DIN, R_, C_)
Input Voltage Low
Input Voltage High
Input Leakage Current
DD
_______________________________________________________________________________________
= AV
PARAMETER
DD
REF
= +2.7V to +3.6V (MAX1233), DV
= 4.096V (MAX1234); f
SYMBOL
V
REFDAC
DNL
V
INL
V
V
I
OS
IH
L
IL
SCLK
DIGITAL-TO-ANALOG CONVERTER
= 10MHz, f
(Note 7)
No missing codes
(Note 8)
Code = 255, no load
Code = 255, no load
Positive and negative
0.5LSB; 50kΩ and 50pF load (Note 9)
Code 127 to 128
From shutdown
(Note 10)
Code = 255; 0 to 100µA
Code = 0; 0 to 100µA
Power-down mode
Y+, X+
Y-, X-
X+ to AV
C4, C3, C2, C1 (Note 11)
R4, R3, R2, R1 (Note 11)
TOUCH-SCREEN CONTROLLER
DD
KEYPAD CONTROLLER
A
DIGITAL INTERFACE
= AV
= +25°C.)
DD
SAMPLE
DD
CONDITIONS
= +4.75V to +5.25V (MAX1234), external reference V
= 50ksps, 12-bit mode, 0.1µF capacitor at REF, T
0.85
DV
AV
0.7
MIN
DD
DD
✕
✕
AV
0.9
TYP
±0.1
±10
0.4
0.5
0.5
1.0
0.5
±1
20
40
50
16
1
7
9
1
DD
✕
0.95
AV
DV
MAX
0.3
±1.0
±1.0
±25
±1
8
5
DD
DD
✕
A
✕
REF
= -40°C to
ppm/°C
ppm/°C
UNITS
V/µs
nV/s
= 2.5V
LSB
LSB
LSB
Bits
MΩ
MΩ
mV
kΩ
kΩ
µA
µs
µs
%
Ω
V
V
V