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BU21026MUV 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BU21026MUV은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 BU21026MUV 기능
기능 4-wire Resistive Touch Screen Controller
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BU21026MUV 데이터시트, 핀배열, 회로
Datasheet
Resistive touch screen controller LSI series
4-wire Resistive
Touch Screen Controller
BU21026MUV
General Description
BU21026MUV is a low power 4-wire resistive touch
screen controller. BU21026MUV measures coordinates
and touch pressures with a 12bit A/D converter.
BU21026MUV has a digital filter for noise reduction.
Features
4-wire resistive touch screen controller
Single 1.65V to 3.60V supply.
Low standby current ( 0.8uA max)
12bit SAR A/D converter
2-wire serial interface
Command base interface
Digital filter
Touch pressure measurement
Auto power down control
Built-in clock oscillation circuit
.
Key Specifications
Power supply voltage
Temperature range
Standby current
Operating current
Coordinate resolution
1.65V to 3.60V
-30to 85
0.8uA (Max.)
120uA (Typ.)
12Bits
Package
VQFN020V4040
W(Typ) x D(Typ) x H(Max)
4.00mm x 4.00mm x 1.00mm
Applications
Equipment with a built in user interface of 4-wire
resistive touch screen
Portable device such as smart phone, tablet, PDA.
Digital still camera, digital video camera, portable TV.
PC / PC peripheral equipment such as laptop PC,
touch screen monitor, printer.
VDD
Typical Application Circuit(s)
3
1.0μF 0.1μF
GND
Auxilary Input
10Ω
10Ω
0.1μF
0.1μF
AUX
XP
YP
BU21026
2
SDA
2.2kΩ
2.2kΩ
Master
( 2-wire serial
interface )
SDA
SCL SCL
INT GPIO
Touch
Screen
1
10Ω
0.1μF
XN
10Ω
0.1μF
YN
5
GND
4
AD1
AD0
GND
GND
1. 4-wire resistive touch screen
2. Pull-up resistor for 2-wire serial interface
3. Bypass capacitors
4. Diodes for ESD protection
5. Low pass filter for noise reduction
Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
This product has no designed protection against radioactive rays
1/19
TSZ02201-0L5L0FF00890-1-2
4.Aug.2016 Rev.001




BU21026MUV pdf, 반도체, 판매, 대치품
BU21026MUV
Block Diagram(s)
VDD
XP
YP
XN
YN
Touch Screen
Interface
Touch
Detection
A/D
Converter
Digital Filter
AUX
Control
Logic
&
2-wire Serial
Interface
INT
SDA
SCL
AD1
AD0
Power On
Reset
Clock
Oscillator
GND
Description of Block(s)
Power on Reset
BU21026MUV requests that the Power on Reset Timing should be observed. If the Power on Reset Timing not be observed,
BU21026MUV may wakeup with a random state. The touch detection and 2-wire serial interface is enabled after taking the
device ready time.
A/D Converter
BU21026MUV has a 12-bit Successive Approximation Resistor (SAR) Analog to Digital (A/D) converter. This A/D converter
is used for measuring X and Y position and Auxiliary input voltage. Output format is in straight binary as shown in below
table.
A/D Convertor Output Format
INPUT VOLTAGE
OUTPUT
(VREF - 1.5LSB) ~ VREF
FFFh
(VREF - 2.5LSB) ~ (VREF - 1.5LSB)
FFEh
(VREF - 3.5LSB) ~ (VREF - 2.5LSB)
FFDh
::
1.5LSB ~ 2.5LSB
002h
0.5LSB ~ 1.5LSB
001h
0 ~ 0.5LSB
000h
Note: VREF = VREFP VREFN, LSB = VREF / 4095
Touch Screen I/F
A touch screen interface is consisted many switches. These switches are used for the driving screen voltage and selection
an input of the A/D converter. State of these switches is selected by a command that sent from the master.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
4/19
TSZ02201-0L5L0FF00890-1-2
4.Aug.2016 Rev.001

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BU21026MUV 전자부품, 판매, 대치품
BU21026MUV
Power on Reset Timing Chart
1.653.60V
VDD
1.4V
0.2V
0V
tF_VDD
tOFF_VDD
tR_VDD
tRDY
(Unless otherwise specified Tj=25[], VDD=3.00[V], GND=0.00[V])
PARAMETER
Off period of VDD
Rise time for VDD
Fall time for VDD
Ready time for device
SYMBOL
tOFF_VDD
tR_VDD
tF_VDD
tRDY
MIN.
0.3
10
0.5
-
RATING
TYP.
-
-
-
-
MAX.
-
100
-
2
UNIT
s
us
ms
ms
CONDITION
2-wire Serial Interface Timing Chart
tHD_STA
tSU_DAT
tHD_DAT
tSU_STA
tHD_STA
tSU_STO
tBUF
SDA
tLOW
tHIGH
tR tF
SCL
START
CONDITION
(Unless otherwise specified Tj=25[], VDD=3.00[V], GND=0.00[V])
PARAMETER
SCL clock frequency
Hold time for (repeated) START condition
Low period of SCL
High period of SCL
Setup time for repeated START condition
Data hold time
Data setup time
Rise time for both SCL and SDA
Fall time for both SCL and SDA
Setup time for STOP condition
Bus free time between a STOP and START condition
SYMBOL
fSCL
tHD_STA
tLOW
tHIGH
tSU_STA
tHD_DAT
tSU_DAT
tR
tF
tSU_STO
tBUF
MIN.
-
0.6
1.3
0.6
0.6
0
100
20
20
0.6
1.3
REPEATED
START
CONDITION
RATING
TYP.
-
-
-
-
-
-
-
-
-
-
-
MAX.
400
-
-
-
-
0.9
-
300
300
-
-
STOP
CONDITION
START
CONDITION
UNIT
KHz
us
us
us
us
us
ns
ns
ns
us
us
CONDITION
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
7/19
TSZ02201-0L5L0FF00890-1-2
4.Aug.2016 Rev.001

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부품번호상세설명 및 기능제조사
BU21026MUV

4-wire Resistive Touch Screen Controller

ROHM Semiconductor
ROHM Semiconductor

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