Overview
The ADS7822E/2K5G4, produced by Texas Instruments, is a 12-bit sampling analog-to-digital (A/D) converter known for its ultra-low power consumption and high-speed operation. This microPower device is designed to operate within a supply range of 2.7V to 5.25V and is particularly suited for battery-operated systems, remote data acquisition, and simultaneous multichannel systems. The ADS7822E features a pseudo-differential input, a synchronous serial interface, and the ability to operate in power-down mode, making it highly efficient in terms of power usage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 | Bits |
| Sampling Rate | 200kHz | |
| Power Consumption at 200kHz | 1.6mW | |
| Power Consumption at 7.5kHz | 0.06mW | |
| Power Down Current | 3μA max | |
| Supply Voltage Range | 2.7V to 5.25V | |
| Reference Voltage Range | 50mV to VCC | |
| Integral Linearity Error | ±2 LSB | |
| Differential Linearity Error | ±0.8 LSB | |
| Offset Error | ±3 LSB | |
| Gain Error | ±4 LSB | |
| Noise | 33 μVrms | |
| Temperature Range | –40°C to +85°C | |
| Package Options | Mini-DIP-8, SO-8, MSOP-8 |
Key Features
- Pseudo-Differential Input: Allows for differential input signals without the need for additional external components.
- Synchronous Serial Interface: Facilitates communication with microprocessors and other digital systems via a 3-wire interface.
- Ultra-Low Power Consumption: Operates at very low power levels, making it ideal for battery-operated systems.
- High-Speed Operation: Supports sampling rates up to 200kHz.
- Power Down Mode: Reduces power dissipation to less than 60μW at lower conversion rates.
- Flexible Reference Voltage: Can be set to any level within the range of 50mV to VCC.
- CMOS Digital Output: Compatible with CMOS logic and can operate with supply voltages from 2.0V to 5V.
Applications
- Battery-Operated Systems: Ideal for devices that require low power consumption to extend battery life.
- Remote Data Acquisition: Suitable for remote sensing and data collection applications.
- Simultaneous Multichannel Systems: Can be used in systems that require multiple channels of analog-to-digital conversion.
- Isolated Data Acquisition: Appropriate for applications requiring isolation between the analog and digital domains.
Q & A
- What is the resolution of the ADS7822E/2K5G4?
The resolution of the ADS7822E/2K5G4 is 12 bits.
- What is the maximum sampling rate of the ADS7822E/2K5G4?
The maximum sampling rate is 200kHz.
- How much power does the ADS7822E/2K5G4 consume at 200kHz?
It consumes approximately 1.6mW at 200kHz.
- What is the power consumption in power-down mode?
In power-down mode, the power consumption is less than 60μW at lower conversion rates.
- What is the range of the supply voltage for the ADS7822E/2K5G4?
The supply voltage range is from 2.7V to 5.25V.
- What is the range of the reference voltage for the ADS7822E/2K5G4?
The reference voltage can be set to any level within the range of 50mV to VCC.
- What types of packages are available for the ADS7822E/2K5G4?
The device is available in Mini-DIP-8, SO-8, and MSOP-8 packages.
- What is the temperature range for the ADS7822E/2K5G4?
The specified temperature range is –40°C to +85°C.
- How does the ADS7822E/2K5G4 communicate with digital systems?
It communicates via a synchronous serial interface.
- What are some typical applications of the ADS7822E/2K5G4?
Typical applications include battery-operated systems, remote data acquisition, simultaneous multichannel systems, and isolated data acquisition.
