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MXB7843
2.375V to 5.25V, 4-Wire Touch-Screen Controller
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Status
Active: In Production.
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 ratiometric 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 battery-operated systems, such as personal digital assistants 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.
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Data Sheet
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An evaluation kit is available: MXB7846EVC16, MXB7846EVKIT
Key Features
- ESD-Protected ADC Inputs
- ±15kV IEC 61000-4-2 Air-Gap Discharge
- ±8kV IEC 61000-4-2 Contact Discharge
- Pin Compatible with MXB7846
- +2.375V to +5.25V Single Supply
- 4-Wire Touch-Screen Interface
- Ratiometric Conversion
- SPI™/QSPI™, 3-Wire Serial Interface
- Programmable 8-/12-Bit Resolution
- Two Auxiliary Analog Inputs
- Automatic Shutdown Between Conversions
- Low Power
- 270µA at 125ksps
- 115µA at 50ksps
- 25µA at 10ksps
- 5µA at 1ksps
- 2µA Shutdown Current
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Applications/Uses
- Cell Phones
- Pagers
- PDAs and Other Handheld Devices
- Point-of-Sale Terminals
- Portable Instrumentation
- Touch-Screen Monitors
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Key Specifications:
| Touch Interface Products |
| Part Number |
Interface |
Channels |
Touch Pressure Measurement |
Digital I/O Supply Voltage
(V) |
Digital Supply Voltage
(V) |
EV Kit |
Oper. Temp.
(°C) |
Package/Pins |
Budgetary Price |
| min |
max |
See Notes |
| MXB7843 |
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4 |
Yes |
2.375 |
5.25 |
Yes |
-40 to +85 |
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$1.93 @1k |
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See All Touch Interface Products (14)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Application Circuit
Application Notes
Product Guides
Reliability Reports
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MXB7843EEE
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Active |
MAX11800
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QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16-5*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MXB7843EEE+
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Active |
MAX11800
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QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16+5*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MXB7843EEE+T
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Active |
MAX11800
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QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16+5*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MXB7843EEE-T
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Active |
MAX11800
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QSOP;16 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MXB7843EUE
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Active |
MAX11800
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MXB7843EUE+
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Active |
MAX11800
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MXB7843EUE+T
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Active |
MAX11800
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MXB7843EUE-T
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Active |
MAX11800
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TSSOP;16 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-2435
Rev 1;
2005-09-27
This page last modified: 2009-10-14
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