Overview
The AD7843ARQZ-REEL is a 12-bit successive-approximation analog-to-digital converter (ADC) designed for touch screen applications, manufactured by Analog Devices Inc. This component is optimized for low power consumption and high-speed data conversion, making it suitable for a variety of touch screen interfaces. It operates from a single power supply ranging from 2.2 V to 5.25 V and features a throughput rate of up to 125 kSPS with a 2 MHz clock.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7843ARQZ-REEL |
| Package | 16-SSOP (0.154, 3.90mm Width) |
| Number of Bits | 12 |
| Sampling Rate | 125 kSPS |
| Polarity | Unipolar |
| Interface | Serial |
| Integral Nonlinearity (INL) | 2 LSB |
| Power Supply Range | 2.2 V to 5.25 V |
| Power Consumption | 1.37 mW max at 125 kSPS with VCC = 3.6 V |
| Shutdown Current | 1 µA max |
Key Features
- 4-wire touch screen interface
- Programmable 8-bit or 12-bit resolution
- Ratiometric conversion mode to eliminate errors due to on-board switch resistances
- Low power consumption with a maximum current of 380 µA at 125 kSPS
- High-speed serial interface
- On-chip track-and-hold, multiplexer, ADC, and serial interface
- Two auxiliary analog inputs
- Shutdown mode with a current of 1 µA max
Applications
The AD7843ARQZ-REEL is primarily used in touch screen applications, including but not limited to:
- Touch screen displays in consumer electronics
- Industrial control panels
- Medical devices with touch screen interfaces
- Automotive systems with touch screen controls
Q & A
- What is the power supply range for the AD7843ARQZ-REEL?
The AD7843ARQZ-REEL operates from a single power supply ranging from 2.2 V to 5.25 V. - What is the maximum throughput rate of the AD7843ARQZ-REEL?
The maximum throughput rate is 125 kSPS with a 2 MHz clock. - What is the resolution of the AD7843ARQZ-REEL?
The AD7843ARQZ-REEL has a programmable resolution of either 8-bit or 12-bit. - What is the power consumption of the AD7843ARQZ-REEL at 125 kSPS?
The power consumption is 1.37 mW max at 125 kSPS with VCC = 3.6 V. - Does the AD7843ARQZ-REEL have a shutdown mode?
Yes, it has a shutdown mode with a current of 1 µA max. - What type of interface does the AD7843ARQZ-REEL use?
The AD7843ARQZ-REEL uses a high-speed serial interface. - What is the package type of the AD7843ARQZ-REEL?
The package type is 16-SSOP (0.154, 3.90mm Width). - Is the AD7843ARQZ-REEL suitable for touch screen applications?
Yes, it is specifically designed for touch screen applications. - What is the integral nonlinearity (INL) of the AD7843ARQZ-REEL?
The INL is 2 LSB. - Does the AD7843ARQZ-REEL have auxiliary analog inputs?
Yes, it has two auxiliary analog inputs.
