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
| Attribute | Attribute value |
| ANSM-Part# | ANSM-MXB7843EEE |
| Category | Integrated Circuits (ICs) |
| Data Acquisition | |
| Touch Screen Controllers | |
| Mfr | Analog Devices Inc./Maxim Integrated |
| Series | - |
| Package | Tube |
| Product Status | Obsolete |
| Touchscreen | 4 Wire Resistive |
| Resolution (Bits) | 12 b |
| Interface | SPI |
| Voltage Reference | External |
| Voltage - Supply | 2.38V ~ 5.25V |
| Current - Supply | 650 μA |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 16-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 16-QSOP |
| Base Product Number | MXB7843 |
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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