MAX1233_05 Datasheet, PDF (3/45 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
Total Harmonic Distortion
SYMBOL
THD
CONDITIONS
MIN TYP MAX UNITS
-84
dB
Spurious-Free Dynamic Range
Full-Power Bandwidth
Full-Linear Bandwidth
CONVERSION RATE
Internal Oscillator Frequency
SFDR
-3dB point
SINAD > 67dB
84
dB
0.5
MHz
50
kHz
8
11.5 MHz
Aperture Delay
Aperture Jitter
30
ns
<50
ps
Maximum Serial Clock Frequency f_SCLK
Duty Cycle
AUXILIARY ANALOG INPUTS (AUX1, AUX2)
Input Voltage Range
10
MHz
30
70
%
0
V_REF
V
Input Leakage Current
Channel not selected or conversion
stopped
±0.1
±1
µA
Input Capacitance
BATTERY MONITOR INPUTS (BAT1, BAT2)
Input Voltage Range
Input Impedance
Sampling battery
Battery monitor OFF
34
pF
0.5
6.0
V
10
kΩ
1
GΩ
Accuracy
TEMPERATURE MEASUREMENT
Temperature Range
Resolution
Accuracy
INTERNAL ADC REFERENCE
Reference Output Voltage
Output Tempco
Reference Output Impedance
Reference Short-Circuit Current
V_REF
TCV_REF
Internal reference
Differential method (Note 4)
Single measurement method (Note 5)
Differential method (Note 4)
Single measurement method (Note 5)
2.5V mode, T_A = +25°C
1.0V mode, T_A = +25°C
Normal operation
-3
+3
%
-40
+85
°C
1.6
°C
0.3
±3
°C
±2
2.470
0.980
2.500
1.000
60
250
18
2.530
1.020
V
ppm/°C
Ω
mA
EXTERNAL ADC REFERENCE (INTERNAL REFERENCE DISABLED, REFERENCE APPLIED TO REF)
Reference Input Voltage Range
Input Impedance
(Note 6)
CS = GND or V_DD
1.0
V_DD
V
1
GΩ
V_REF = +2.5V at 50ksps (MAX1233)
5
10
Input Current
V_REF = +4.096V at 50ksps (MAX1234)
8
15
µA
Shutdown/between conversions
±0.1
_______________________________________________________________________________________ 3