Datasheet
TSC2101
SLAS392D− JUNE 2003 − REVISED MAY 2005
www.ti.com
4
ELECTRICAL CHARACTERISTICS
At +25°C, AVDD1, AVDD2, DRVDD, IOVDD = 3.3 V, BVDD = 3.9 V, DVDD = 1.8 V, V
ref
= 2.5 V, Fs (Audio) = 48 kHz, unless otherwise noted
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
TOUCH SCREEN
AUXILIARY ANALOG INPUT
Input voltage range 0 +VREF V
Input capacitance
AUX1/2 input selected as input by touch-screen
25 pF
Input leakage current
AUX1/2 input selected as input by touch screen
±1 µA
BATTERY MONITOR INPUTS
Input voltage range 0.5 6.0 V
Input leakage current Battery conversion not selected ±1 µA
Accuracy
Variation across temperature after system
calibration at 4 V battery voltage and room
temperature
±15 mV
TOUCH SCREEN A/D CONVERTER
Resolution Programmable: 8-, 10-,12-bits 8 12 Bits
No missing codes 12-Bit resolution 11 Bits
Integral nonlinearity −5 5 LSB
Offset error −6 6 LSB
Gain error −6 6 LSB
Noise 50 µVrms
VOLTAGE REFERENCE (VREF)
VREF output programmed = 2.5 V 2.3 2.5 2.7
V
Voltage range
VREF output programmed = 1.25 V 1.25
V
Voltage range
External reference 1.1 2.5 V
Reference drift Internal VREF = 1.25 V 50 ppm/°C
Current drain
Extra current drawn when the internal reference is
turned on.
750 µA
AUDIO CODEC
ADC DECIMATION FILTER CHARACTERISTICS
Filter gain from 0 to 0.39 Fs ±0.1 dB
Filter gain at 0.4125 Fs −0.25 dB
Filter gain at 0.45 Fs −3.0 dB
Filter gain at 0.5 Fs −17.5 dB
Filter gain from 0.55 Fs to 64 Fs −75 dB
Group delay 17/Fs sec