Burr Brown Products
from Texas Instruments
TSC2301
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
PROGRAMMABLE TOUCH SCREEN CONTROLLER
WITH STEREO AUDIO CODEC
FEATURES
•
•
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 and Key
Masking
– Integrated Touch Screen Processor
Reduces Host CPU Interrupts and Overhead
– Internal Timing Control With Programmable
Delays and Averaging
Stereo Audio Codec
– 20-Bit Delta-Sigma ADC/DAC
– Dynamic Range: 98 dB
– Sampling Rate Up to 48 kHz
– I
2
S Serial Interface
– Stereo 16-Ω Headphone Driver
Full Power-Down Control
8-Bit Current Output DAC
On-Chip Crystal Oscillator
Programmable Bass/ Midrange/ Treble EQ
Effects Processing
6 GPIO Pins
Single 2.7-V to 3.6-V Supply
64-Pin TQFP Package
120-Ball MicroStar Junior™ BGA Package
APPLICATIONS
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•
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Personal Digital Assistants
Cellular Phones
MP3 Players
Internet Appliances
Smartphones
DESCRIPTION
The TSC2301 is a highly integrated PDA analog
interface circuit. It contains a complete 12-bit A/D
resistive touch screen converter (ADC) including
drivers, touch pressure measurement capability,
keypad controller, and 8-bit D/A converter (DAC)
output for LCD contrast control. The TSC2301 offers
programmable resolution of 8, 10, and 12 bits and
sampling rates up to 125 kHz to accommodate
different screen sizes. The TSC2301 interfaces to the
host controller through a standard SPI serial
interface.
The TSC2301 features a high-performance 20-bit,
48-ksps stereo audio codec with highly integrated
analog functionality. The audio portion of the
TSC2301 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. A fully
programmable PLL for generating audio clocks from a
wide variety of system clocks is also included.
The TSC2301 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 TSC2301 is available in 64-lead
TQFP, and 120-ball VFBGA packages.
US Patent No. 6246394
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FUNCTIONAL BLOCK DIAGRAM
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.
MicroStar Junior is a trademark of Texas Instruments.
SPI is a trademark of Motorola.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2002–2004, Texas Instruments Incorporated
TSC2301
www.ti.com
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
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
Headphone Driver
DAC playback through headphone
driver
No input
1-kHz, 0-dB input
20
0.45 Fs
0.55 Fs
65
DAC performance measured at Line
Outputs using Fs = 48 kHz
0.18*
AVDD
98
-100
0.45 Fs
0.55 Fs
3.5 Fs
Vrms
dB
dB
Hz
Hz
Hz
dB
0.45 Fs
0.55 Fs
70dB
Line, Mic inputs
Line outputs
ADC performance measured using
Fs = 48 kHz
No input
1 kHz, -0.5 dB input
80
88
-70
0.18*
AVDD
0.55 Fs
127 Fs
-60
dB
dB
Vrms
Hz
Hz
0.15* AVDD
0.15* AVDD
0.65* AVDD
0.65* AVDD
V
V
48
kHz
TSC2301IPAG
TSC2301IGQZ
<300
Programmable: 8-, 10-,12-Bits
12-bit resolution
10
±6
±6
±6
±10
12
Bits
Bits
LSB
LSB
LSB
µV
RMS
-40
0.3
±2
+85
°C
°C
°C
0
25
±1
6.0
V
ρF
µA
0
25
1
+VREFIN
V
ρF
µA
Conditions
TSC2301
Min
Typ
Max
Units
4
TSC2301
www.ti.com
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
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
Output power per channel
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
Touch screen only
Touch screen only
Stereo playback only
Voice record only
Power down
(1)
(1)
Conditions
TSC2301
Min
Typ
14
27
32
85
96
-83
-77
0.75
1.10
8
-70
Max
Units
mW
mW
mW
dB
dB
dB
mA
Bits
R = 32
Ω
1-kHz, 0-dB input
R = 16
Ω
1-kHz, -3-dB input
Measured with ARNG floating
TSC2301IPAG
TSC2301IGQZ
Internal 2.5 V
2.34
2.34
2.49
2.49
50
20
8.8
CMOS
2.54
2.64
V
ppm/°
C
µA
MHz
V
I
IH
= 5 µA
I
IL
= 5 µA
I
OH
= 2 TTL loads
I
OL
= 2 TTL loads
0.7 V
DD
-0.3
0.8* DVDD
0.2* DVDD
0.3 V
DD
V
V
V
2.7
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
3.6
V
µA
mA
mA
mA
µA
For more details on power consumption, see the Audio Codec section of the description overview.
5
Embedded System
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