TSC2301
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
PROGRAMMABLE TOUCH SCREEN CONTROLLER
WITH STEREO AUDIO CODEC
FEATURES
APPLICATIONS
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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
– I2S 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
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 I2S 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
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
MICBIAS
AFILTR
AFILTL
I2SDIN
AVDD - 1V
AVDD
30k Ω
I2S
INTERFACE
VCM
I2SDOUT
LRCLK
20k Ω
BCLK
AGND
Mute, 0db, 6dB, 12dB
MICIN
+20 to - 40dB,
0.5dB Steps
317Ω
Σ∆
ADC
RLINEIN
+12dB to 35dB
0.5dB steps
+20 to - 40dB,
0.5dB Steps
317Ω
Σ∆
ADC
LLINEIN
Digital
Audio
Processing
And
PLL
MCLK
DVDD (2)
MONO+
MONO-
DGND (2)
VREF+
VREFRESET
HPVDD
HPGND
POL
Headphone
Driver
VOUTL
Headphone
Driver
VBAT2
Control
CONTROL
Interface
LOGIC
&
SPI
INTERFACE
SPIDIN
SPIDO
DAV
PENIRQ
DAC
KBIRQ
Touch
Pannel
Drivers
Internal 2.5V/
1.25V Reference
Temp
Sensor
VBAT1
Digital Gain
0 to - 63.5dB
0.5dB Steps
Σ∆
DAC
HPL
DACOUT
VREFIN
X+
XY+
Y-
SPICLK
SPISEL
VOUTR
DACSET
Σ∆
DAC
HPR
Digital Gain
0 to - 63.5dB
0.5dB Steps
SAR
ADC
Battery
Monitor
GPIO_0
GPIO_1
Battery
Monitor
AUX1
AUX2
GPIO
INTERFACE
Keypad Scanner and State Control
GPIO_2
GPIO_3
GPIO_4
COI
COO
OSC
GPIO_5/CLKO
C1 C2
2
C3 C4
R1 R2
R3
R4
TSC2301
www.ti.com
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
PACKAGE/ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
DESIGNATOR
TQFP-64
PAG
TSC2301I
OPERATING
TEMPERATURE RANGE
GQZ
–40°C to 85°C
VFBGA-120
ZQZ
ORDERING
NUMBER
TRANSPORT MEDIA
QUANTITY
TSC2301IPAG
Trays, 160
TSC2301IPAGR
Tape and reel, 1500
TSC2301IGQZ
Trays, 250
TSC2301IGQZR
Tape and reel, 2500
TSC2301IZQZ
Trays, 250
TSC2301IZQZR
Tape and reel, 2500
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted (1)
TSC2301
Supply voltage
AVDD, HPVDD, DVDD
Ground voltage differences
AGND, DGND
4V
±0.1 V
Digital input voltage
-0.3 V to (DVDD + 0.3 V)
Analog input voltage
-0.3 V to (AVDD + 0.3 V)
Ambient temperature under bias, TA
-40°C to 125°C
Storage temperature, Tstg
-55°C to 150°C
Junction temperature, TJ
150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
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.
3
TSC2301
www.ti.com
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
ELECTRICAL CHARACTERISTICS
At 25°C, HPVDD = AVDD = DVDD = +3.3 V, VREF = External 2.5 V, unless otherwise noted.
Parameter
Conditions
TSC2301
Min
Typ
Units
Max
Auxilary Analog Inputs
Input voltage range
0
Input capacitance
Input leakage current
+VREFIN
V
25
ρF
1
µA
Battery Monitor Input
Input voltage range
0
6.0
V
Input capacitance
25
ρF
Input leakage current
±1
µA
Temperature Measurement
Temperature range
-40
+85
°C
Temperature resolution
0.3
°C
Accuracy
±2
°C
Touch Screen A/D Converter
Resolution
Programmable: 8-, 10-,12-Bits
12
Bits
No missing codes
Integral linearity
12-bit resolution
±6
LSB
Offset error
±6
LSB
Gain error
10
Bits
TSC2301IPAG
±6
TSC2301IGQZ
±10
Noise
LSB
µV
RMS
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