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TSC2111 Datasheet(PDF) 5 Page - Texas Instruments

Part No. TSC2111
Description  AUDIO CODEC WITH INTERGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TSC2111 Datasheet(HTML) 5 Page - Texas Instruments

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TSC2111
SLAS495− JUNE 2006
www.ti.com
5
ELECTRICAL CHARACTERISTICS
At +25
°C, AVDD1, AVDD2, DRVDD, IOVDD = 3.3 V, BVDD = 3.9 V, DVDD = 1.8 V, Vref = 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
30
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
20
ppm/
°C
Current drain
Extra current drawn when the internal reference is turned on.
750
µA
AUDIO CODEC
ADC CHANNEL DIGITAL 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
−0.3
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
MICROPHONE INPUT TO ADC
MICIN_HED 1020 Hz sine wave input, Fs = 48 ksps
Full-scale input voltage (0 dB)
0.707
Vrms
Input common mode
1.5
V
SNR
Measured as idle channel noise, 0 dB gain, A-weighted
80
90
dBA
THD
0.63 Vrms input, 0-dB gain
−81
−72
dB
PSRR
217 Hz, 100 mV on AVDD1/2(1)
55
dB
PSRR
1020 Hz, 100 mV on AVDD1/2(1)
55
dB
Mute attenuation
Output code with 0.63 Vrms sine wave input at 1 kHz
0000H
Input resistance
Only ADC on
15
50
k
Input resistance
ADC and Sidetone on
8
16
k
Input capacitance
10
pF
(1) ADC PSRR measurement is calculated as:
PSRR
+ 20 log
10
VSIGsup
V
ADCOUT
where VSIGsup is the ac signal applied on AVDD1/2, which is 100 mVPP at 1020 Hz, and
V
ADCOUT +
Amplitude of Digital Output
Max Possible Digital Amplitude


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