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BL2046 데이터시트 PDF




BELLING에서 제조한 전자 부품 BL2046은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 BL2046 자료 제공

부품번호 BL2046 기능
기능 Low Voltage I/O TOUCH SCREEN CONTROLLER
제조업체 BELLING
로고 BELLING 로고


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BL2046 데이터시트, 핀배열, 회로
BL2046
Low Voltage I/O TOUCH SCREEN CONTROLLER
Features
2.2V to 5.25V operation
1.5V to 5.25V digital I/O
Internal 2.5V reference
4-wire I/F
Programmable 8 or 12 bit Resolution
Direct battery measurement(0V to 6V)
Temperature measurement
Touch-pressure measurement
Available in QFN-16 and TSSOP-16 package
General Description
The BL2046 is a 4-wire touch screen controller which supports a low-voltage I/O interface from
1.5V to 5.25V. The BL2046 has an on-chip 2.5V reference that can be used for the auxiliary input,
battery monitor, and temperature measurement modes. The reference can also be powered down
when not used to conserve power. The internal reference operates down to 2.7V supply voltage,
while monitoring the battery voltage from 0V to 6V.
The BL2046 is a highly integrated controller for portable applications with 4-wire resistive touch
panel such as, PDA, portable instruments, cellular phone, etc.
Applications
Cellular phones
Personal digital assistants
Touch screen monitors
Portable instruments
Order Information
Part Number
BL2046QN
BL2046TS
Package
QFN-16
TSSOP-16
Shipping
3000pcs / Tape & Reel
2500pcs / Tape & Reel
http://www.belling.com.cn
-1-
Total 1 Pages




BL2046 pdf, 반도체, 판매, 대치품
Internal Reference Drift
Quiescent Current
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
TEMPERATURE
MEASUREMENT
Temperature Range
Resolution
Accuracy
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Offset Error
Gain Error
Noise
Power-Supply Rejection
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Multiplexer Settling Time
Aperture Delay
Aperture Jitter
Channel-to-Channel Isolation
BATTERY MONITOR
Input Voltage Range
Input Impedance
Sampling Battery
Battery Monitor Off
Accuracy
REFERENCE INPUT
Range
Input Impedance
http://www.belling.com.cn
Positive Input-Negative Input
Positive Input
Negative Input
Differential Method3
TEMPO:4
Differential Method3
TEMPO4
External VREF
Including Internal VREF
VIN = 2.5Vp-p at 50kHz
VBAT = 0.5V to 5.5V, External
VREF =2.5V
VBAT = 0.5V to 5.5V,
Internal Reference
SInEteRrnal R=eDfe,rePnDce1 O=ff0,
-4-
0
-0.2
-0.2
-40
11
3
0.5
-2
-3
1.0
BL2046
15 ppm/
500 uA
VREF
+VCC+0.2
+0.2
25
0.1
V
V
V
PF
uA
+85
1.6
0.3
±2
±3
12 Bits
Bits
±2 LSB1
±6 LSB
±4 LSB
70 uVrms
70 dB
12
125
500
30
100
100
CLKCycles
CLKCycles
khz
ns
ns
ps
dB
6.0 V
10 k
1 G
+2 %
+3 %
+VCC
V
1 G
Total 4 Pages

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BL2046 전자부품, 판매, 대치품
BL2046
This particular application shows the device being used to digitize a resistive touch screen. A
measurement of the current Y-Position of the pointing device is made by connecting the X+ input
to the ADC, turning on the Y+ and Y– drivers, and digitizing the voltage on X+. For this
measurement, the resistance in the X+ lead does not affect the conversion. However, since the
resistance between Y+ and Y– is fairly low, the on-resistance of the Y drivers does make a small
difference. Under the situation outlined so far, it is not possible to achieve a 0V input or a
full-scale input regardless of where the pointing device is on the touch screen because some
voltage is lost across the internal switches. In addition, the internal switch resistance is unlikely to
track the resistance of the touch screen, providing an additional source of error.
Figure 2. Diagram of Single-Ended Reference (SER/
analog input).
high, Y switches enabled, X+ is
This situation can be remedied (see Figure 3) . By setting the SER/ bit low, the +REF and
–REF inputs are connected directly to Y+ and Y–, respectively, which makes the analog-to-digital
conversion ratiometric. The result of the conversion is always a percentage of the external
resistance, regardless of how it changes in relation to the on-resistance of the internal switches.
Note that there is an important consideration regarding power dissipation when using the
ratiometric mode of operation.
As a final note about the differential reference mode, it must be used with +VCC as the source of
the +REF voltage and cannot be used with VREF. It is possible to use a high-precision reference on
VREF and single-ended reference mode for measurements which do not need to be ratiometric. In
some cases, it is possible to power the converter directly from a precision reference. Most
references can provide enough power for the BL2046, but might not be able to supply enough
current for the external load (such as a resistive touch screen).
http://www.belling.com.cn
-7-
Total 7 Pages

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관련 데이터시트

부품번호상세설명 및 기능제조사
BL2046

Low Voltage I/O TOUCH SCREEN CONTROLLER

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