Overview
The AD7843ARQZ-REEL7, produced by Analog Devices Inc., is a 12-bit successive approximation Analog-to-Digital Converter (ADC) designed specifically for touch screen applications. It features a synchronous serial interface and low on-resistance switches, making it ideal for battery-powered systems such as personal digital assistants, smart hand-held devices, and other portable equipment. The device operates from a single power supply ranging from 2.2 V to 5.25 V and supports throughput rates greater than 125 kSPS.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | Programmable 8-bit or 12-bit | - |
| Power Supply Range | 2.2 V to 5.25 V | V |
| Throughput Rate | Greater than 125 kSPS | kSPS |
| Operating Temperature | -40°C to 85°C | °C |
| Package Type | 16-lead QSOP or TSSOP | - |
| Shutdown Current | µA | |
| Analog Input Range | 0 V to VREF (1 V to VCC) | V |
| Interface | Serial | - |
Key Features
- 4-wire touch screen interface
- Low power consumption: 1.37 mW max at 125 kSPS with VCC = 3.6 V
- Ratiometric conversion
- High speed serial interface
- Programmable 8-bit or 12-bit resolution
- 2 auxiliary analog inputs
- Shutdown mode: less than 1 µA current consumption
- On-board switches with low on-resistance for driving touch screens
Applications
- Personal digital assistants
- Smart hand-held devices
- Touch screen monitors
- Point-of-sales terminals
- Pagers
Q & A
- What is the AD7843ARQZ-REEL7 used for?
The AD7843ARQZ-REEL7 is used for touch screen applications, particularly in battery-powered systems like personal digital assistants and smart hand-held devices.
- What is the power supply range of the AD7843ARQZ-REEL7?
The device operates from a single power supply ranging from 2.2 V to 5.25 V.
- What is the throughput rate of the AD7843ARQZ-REEL7?
The throughput rate is greater than 125 kSPS.
- What types of packages are available for the AD7843ARQZ-REEL7?
The device is available in 16-lead QSOP and TSSOP packages.
- What is the operating temperature range of the AD7843ARQZ-REEL7?
The operating temperature range is from -40°C to 85°C.
- Does the AD7843ARQZ-REEL7 have a shutdown mode?
Yes, the device has a shutdown mode that reduces the current consumption to less than 1 µA.
- What is the resolution of the AD7843ARQZ-REEL7?
The resolution is programmable to either 8-bit or 12-bit.
- What is the analog input range of the AD7843ARQZ-REEL7?
The analog input range is from 0 V to VREF (which can be between 1 V and VCC).
- Does the AD7843ARQZ-REEL7 support serial interface?
Yes, it supports a high speed serial interface.
- What are the auxiliary inputs on the AD7843ARQZ-REEL7?
The device includes 2 auxiliary analog inputs.
