Product Descriptions

The MXB7843 is an industry-standard 4-wire touchscreen controller. It contains a 12-bit sampling analogto-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.

Product 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

Product Applications

Personal Digital Assistants

Portable Instruments

Point-of-Sales Terminals

Pagers

Touch-Screen Monitors

Cellular Phones

Specifications

Actual product photos

Product Data Book：

For more product information, please download the PDF

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

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