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TSC2300
SLAS372 — NOVEMBER 2002
PROGRAMMABLE TOUCH SCREEN CONTROLLER
WITH AUDIO CODEC
FEATURES
APPLICATIONS
•
•
•
•
•
•
•
•
SPI™ Serial Interface
Touch screen Controller
– 4-Wire Touch Screen Interface
– Internal Detection of Screen Touch and
Keypad Press
– Touch Pressure Measurement
– Ratiometric Conversion
– Programmable 8, 10 or 12 Bit Resolution
– Programmable Sampling Rates Up to 125
kHz
– Direct Battery Measurement (0 to 6 V)
– On-Chip Temperature Measurement
– 4-by-4 Keypad Interface With
Programmable De-bounce
– Integrated Touch Screen Processor
Reduces Host CPU Interrupts and
Overhead
– Internal Timing Control With Programmable
Delays
Audio Codec
– 20-Bit Delta-Sigma ADC/DAC
– Dynamic Range: 98 dB
– Sampling Rate Up To 48 kHz
– I
2
S Serial Interface
Full Power Down Control
On-Chip Crystal Oscillator
6 GPIO Pins
Single 2.7-V to 3.6-V Supply
64-pin TQFP Package
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•
•
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Personal Digital Assistants
Cellular Phones
MP3 Players
Internet Appliances
Smartphones
DESCRIPTION
The TSC2300 is a highly integrated PDA analog
interface circuit. It contains a complete 12-bit A/D
resistive touch screen converter including drivers, touch
pressure measurement capability, keypad controller and
8-bit D/A converter output for LCD contrast control. The
TSC2300 offers programmable resolution of 8, 10, and
12 bits and sampling rates up to 125 kHz to
accommodate different screen sizes. The TSC2300
interfaces to the host controller through a standard SPI
serial interface.
The TSC2300 features a high-performance 20-bit,
48-ksps audio codec with highly integrated analog
functionality. The audio portion of the TSC2300 contains
microphone input with built-in pre-amp and microphone
bias circuit, an auxiliary stereo analog input, a stereo
line-level output, a differential mono line-level output,
and a stereo headphone amplifier output. The digital
audio data is transferred through a standard I
2
S
interface.
The TSC2300 also offers two battery measurement
inputs capable of battery voltages up to 6 V, while
operating at a supply voltage of only 2.7 V. It also has an
on-chip temperature sensor capable of reading 0.3°C
resolution. The TSC2300 is available in a 64-lead TQFP.
US Patent No. 6246394
SPI is a trademark of Motorola.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright © 2002, Texas Instruments Incorporated
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TSC2300
SLAS372 — NOVEMBER 2002
PACKAGE/ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
DESIGNATOR
SPECIFICATION
TEMPERATURE
RANGE
-40°C to +85°C
ORDERING
NUMBER
TSC2300IPAG
TSC2300IPAGR
TRANSPORT MEDIA
TSC2300I
TQFP-64
PAG
Trays
Tape and Reel
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted
(1)
TSC2300
Supply voltage:
Ground voltage differences:
Digital input voltage
Analog input voltage
Ambient temperature under bias, T
A
Storage temperature, T
stg
Junction temperature, T
J
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
AVDD, HPVDD, DVDD
AGND, DGND
4V
±0.1
V
-0.3 V to (DV
DD
+ 0.3 V)
-0.3 V to (AV
DD
+ 0.3 V)
-40°C to 125°C
-55°C to 150°C
150°C
260°C
(1)
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
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TSC2300
SLAS372 — NOVEMBER 2002
www.ti.com
ELECTRICAL CHARACTERISTICS
At 25°C, HPV
DD
= AV
DD
= DV
DD
= +3.3 V, V
REF
= External 2.5 V, unless otherwise noted.
PARAMETER
AUXILARY ANALOG INPUTS
Input voltage range
Input capacitance
Input leakage current
BATTERY MONITOR INPUT
Input voltage range
Input capacitance
Input leakage current
TEMPERATURE MEASUREMENT
Temperature range
Temperature resolution
Accuracy
TOUCH SCREEN A/D CONVERTER
Resolution
No missing codes
Integral linearity
Offset error
Gain error
Noise
AUDIO CODEC
Sampling frequency
AUDIO I/O
Audio in
Audio out
AUDIO ADC
Signal-to-noise ratio, A-weighted
Total harmonic distortion
Full-scale input voltage
Transition band
Stop band
Stop band rejection
AUDIO DAC
Full-scale output voltage
Signal-to-noise ratio, A-weighted
Total harmonic distortion
Frequency response
Transition band
Stop band
Stop band rejection
4
1 kHz input
1 kHz, 0 dB input
20
0.45Fs
0.55Fs
65
DAC performance measured at Line
Outputs using Fs=48 KHz
0.18*
AVDD
98
-100
0.45Fs
0.55Fs
3.5Fs
Vrms
dB
dB
Hz
Hz
Hz
dB
0.45Fs
0.55Fs
70dB
Line, Mic inputs
Line outputs
ADC performance measured using
Fs=48 KHz
1 kHz input
1 kHz, -0.5 dB input
80
88
-70
0.18*
AVDD
0.55Fs
127Fs
-60
dB
dB
Vrms
Hz
Hz
0.15*
AVDD
0.15*
AVDD
0.65* AVDD
0.65* AVDD
V
V
48
kHz
<300
Programmable: 8-, 10-,12-Bits
12-bit resolution
10
±6
±6
±6
12
Bits
Bits
LSB
LSB
LSB
µV
RMS
-40
0.3
±2
+85
°C
°C
°C
0.5
25
±1
6.0
V
ρF
µA
0
25
1
+VREFIN
V
ρF
µA
CONDITIONS
TSC2300
MIN
TYP
MAX
UNITS
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TSC2300
SLAS372 — NOVEMBER 2002
ELECTRICAL CHARACTERISTICS (continued)
At 25°C, HPV
DD
= AV
DD
= DV
DD
= +3.3 V, V
REF
= External 2.5 V, unless otherwise noted.
PARAMETER
HEADPHONE DRIVER
Output power per channel
CONDITIONS
DAC playback through headphone
driver
R=32
Ω
R=16
Ω
R=16
Ω
V
DD
=3.6V
Signal-to-noise ratio, A-weighted
Total harmonic distortion
D/A CONVERTER
Output current range
Resolution
VOLTAGE REFERENCE
Voltage range
Reference drift
Current drain
DIGITAL INPUT / OUTPUT
Internal clock frequency
Logic family
Logic level: V
IH
V
IL
V
OH
V
OL
POWER SUPPLY REQUIREMENTS
Power supply voltage
DV
DD
, AV
DD
, HPV
DD
Quiescent current (1)
Touch screen only
Touch screen only
Playback only
Voice Record only
Power down
(1)
1 kHz SAR sample rate, external V
ref
20 kHz SAR sample rate, internal V
ref
44.1 kHz Playback, V
DD
=2.7V
Mono 8 kHz record, V
DD
=2.7V
Audio fully powered down
14
1.7
10
5.8
.05
µA
mA
mA
mA
µA
2.7
3.6
V
I
IH
=5µA
I
IL
=5µA
I
OH
=2 TTL loads
I
OL
=2 TTL loads
0.7V
DD
-0.3
0.8*
DVDD
0.2* DVDD
0.3V
DD
8.8
CMOS
V
V
V
V
MHz
Internal 2.5 V
2.34
2.49
50
20
2.54
V
ppm/°
C
µA
Measured with ARNG floating
0.75
1.10
8.8
mA
Bits
R=32
Ω
1 kHz, 0 dB input
R=16
Ω
1 kHz, -3 dB input
85
14
27
32
96
-83
-77
-70
mW
mW
mW
dB
dB
dB
TSC2300
MIN
TYP
MAX
UNITS
For more details on power consumption, see the Audio Codec section of the description overview.
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