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| 型號： | MXB7843EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 2.375V to 5.25V, 4-Wire Touch-Screen |
| 中文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, MO-137AB, QSOP-16 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大小： | 508K |
| 代理商： | MXB7843EEE |
General Description
The MXB7843 is an industry-standard 4-wire touch-
screen controller. It contains a 12-bit sampling analog-
to-digital converter (ADC) with a synchronous serial
interface and low on-resistance switches for driving
resistive touch screens. The MXB7843 uses an external
reference. The MXB7843 can make absolute or ratio-
metric measurements. The MXB7843 has two auxiliary
ADC inputs. All analog inputs are fully ESD protected,
eliminating the need for external TransZorb devices.
The MXB7843 is guaranteed to operate with a single
2.375V to 5.25V supply voltage. In shutdown mode, the
typical power consumption is reduced to under 0.5μW,
while the typical power consumption at 125ksps
throughput and a 2.7V supply is 650μW.
Low-power operation makes the MXB7843 ideal for bat-
tery-operated systems, such as personal digital assis-
tants with resistive touch screens and other portable
equipment. The MXB7843 is available in 16-pin QSOP
and TSSOP packages, and is guaranteed over the
-40°C to +85°C temperature range.
Applications
Personal Digital Assistants
Portable Instruments
Point-of-Sales Terminals
Pagers
Touch-Screen Monitors
Cellular Phones
Features
o
ESD-Protected ADC Inputs
±15kV IEC 61000-4-2 Air-Gap Discharge
±8kV IEC 61000-4-2 Contact Discharge
o
Pin Compatible with MXB7846
o
+2.375V to +5.25V Single Supply
o
4-Wire Touch-Screen Interface
o
Ratiometric Conversion
o
SPI/QSPI, 3-Wire Serial Interface
o
Programmable 8-/12-Bit Resolution
o
Two Auxiliary Analog Inputs
o
Automatic Shutdown Between Conversions
o
Low Power
270μA at 125ksps
115μA at 50ksps
25μA at 10ksps
5μA at 1ksps
2μA Shutdown Current
M
2.375V to 5.25V, 4-Wire Touch-Screen
Controller
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
DD
DCLK
CS
DIN
BUSY
DOUT
PENIRQ
V
DD
REF
TOP VIEW
MXB7843
QSOP/TSSOP
X+
Y+
GND
X-
Y-
IN3
IN4
Pin Configuration
Ordering Information
19-2435; Rev 0; 4/02
PART
TEMP RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
16 QSOP
16 TSSOP
MXB7843EEE
MXB7843EUE
TransZorb is a trademark of General Semiconductor Industries,
Inc.
SPI/QSPI are trademarks of National Semiconductor Corp.
Typical Application Circuit appears at end of data sheet.
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