參數(shù)資料
型號: TSC2300IPAGG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝: GREEN, PLASTIC, TQFP-64
文件頁數(shù): 11/81頁
文件大?。?/td> 1039K
代理商: TSC2300IPAGG4
www.ti.com
PENIRQ
+VCC
VREF
TEMP1
TEMP0
Ref ON/OFF
1.25/2.5 V
Reference
+IN
–IN
+REF
–REF
Converter
2.5 k
5.0 k
5.0 k
7.5 k
Battery
on
Battery
on
GND
IN2
IN1
VBAT2
VBAT1
Y–
Y+
X–
X+
0V
FS = Full–Scale Voltage = VREF(1)
1 LSB = VREF(1)/4096
FS – 1 LSB
11...111
11...110
11...101
00...010
00...001
00...000
1 LSB
NOTES: (1) Reference voltage at converter: +REF–(–REF). See Figure 4.
(2) Input voltage at converter, after multiplexer: +IN–(–IN). See Figure 4
Input Voltage(2) (A)
Output
Code
TSC2300
SLAS372 — NOVEMBER 2002
Figure 47. Simplified Diagram of the Touch Screen Analog Input Section
Data Format
The TSC2300 output data is in straight binary format as shown in Figure 48. This figure shows the ideal output code
for the given input voltage and does not include the effects of offset, gain, or noise.
Figure 48. Ideal Input Voltages and Output Codes.
Reference
The TSC2300 has an internal voltage reference that can be set to 1.2 V or 2.5 V, through the reference control
register. This reference can also be set to automatically power down between conversions to save power, or remain on
to reduce settling time.
The internal reference voltage is only used in the single-ended mode for battery monitoring, temperature measurement,
and for utilizing the auxiliary inputs. Optimal touch screen performance is achieved when using a ratiometric
conversion, thus all touch screen measurements are done automatically in the differential mode.
An external reference can also be applied to the VREFIN pin, and the internal reference can be turned off.
19
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