MAX1233_05 Datasheet, PDF (4/45 Pages) Maxim Integrated Products – ±15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller

±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
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
DC ACCURACY
Resolution
Integral Linearity Error
Differential Linearity Error
Offset Error
Offset Error Temperature
Coefficient
SYMBOL
CONDITIONS
DIGITAL-TO-ANALOG CONVERTER
INL
DNL
V_OS
(Note 7)
No missing codes
(Note 8)
MIN TYP MAX UNITS
8
Bits
±1.0
LSB
±1.0
LSB
±1
±25
mV
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
Output Settling Time
Glitch Impulse
Wake-Up Time
DAC OUTPUT
Positive and negative
0.5LSB; 50kΩ and 50pF load (Note 9)
Code 127 to 128
From shutdown
0.4
V/µs
20
µs
40
nV/s
50
µs
Internal DAC Reference
Output Load Regulation
Output Resistance
On-Resistance
V_REFDAC (Note 10)
Code = 255; 0 to 100µA
Code = 0; 0 to 100µA
Power-down mode
TOUCH-SCREEN CONTROLLER
Y+, X+
Y-, X-
0.85 ✕ 0.9 ✕ 0.95 ✕
V
AV_DD AV_DD AV_DD
0.5
LSB
0.5
1.0
MΩ
7
Ω
9
Touch-Detection Internal Pullup
Resistance
X+ to AV_DD
1
MΩ
Pullup Resistance
Pulldown Resistance
DIGITAL INPUTS (SCLK, CS, DIN, R_, C_)
KEYPAD CONTROLLER
C4, C3, C2, C1 (Note 11)
R4, R3, R2, R1 (Note 11)
DIGITAL INTERFACE
0.5
kΩ
16
kΩ
Input Voltage Low
V_IL
0.3 ✕
V
DV_DD
Input Voltage High
V_IH
Input Leakage Current
I_L
0.7 ✕
V
DV_DD
±0.1
±1
µA
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