Overview
The ADS7822E/250, 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 conversion capabilities. This microPower device operates within a supply range of 2.7V to 5.25V and is designed for applications requiring minimal power dissipation. The ADS7822E/250 is particularly suited for battery-operated systems, remote data acquisition, and simultaneous multichannel systems due to its low power requirements and small package size.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 | Bits |
| Sampling Rate | Up to 200kHz | |
| Power Consumption | 1.6mW at 200kHz, 0.54mW at 75kHz, 0.06mW at 7.5kHz | mW |
| Supply Voltage Range | 2.7V to 5.25V | V |
| Reference Voltage Range | 50mV to VCC | V |
| Integral Linearity Error | ±2 LSB | LSB |
| Differential Linearity Error | ±0.8 LSB | LSB |
| Input Capacitance | 25 pF | pF |
| Power Down Current | 3 μA max | μA |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Options | Mini-DIP-8, SO-8, MSOP-8 |
Key Features
- Ultra-Low Power Consumption: The ADS7822E/250 consumes very little power, with 1.6mW at 200kHz, making it ideal for battery-operated systems.
- High-Speed Conversion: Capable of sampling at up to 200kHz.
- Pseudo-Differential Input: Allows for differential input signals with the –In input not resampled later in the conversion cycle.
- Serial Interface: Features a synchronous serial interface for data transfer.
- Flexible Reference Voltage: The reference voltage can be set to any level within the range of 50mV to VCC.
- Power Down Mode: Low power dissipation in power-down mode, with a maximum current of 3 μA.
Applications
- Battery-Operated Systems: Ideal due to its ultra-low power consumption.
- Remote Data Acquisition: Suitable for remote data-acquisition modules.
- Simultaneous Multichannel Systems: Can be used in systems requiring simultaneous sampling of multiple channels.
- Isolated Data Acquisition: Appropriate for isolated data acquisition applications.
Q & A
- What is the resolution of the ADS7822E/250?
The resolution of the ADS7822E/250 is 12 bits.
- What is the maximum sampling rate of the ADS7822E/250?
The maximum sampling rate is up to 200kHz.
- What is the power consumption of the ADS7822E/250 at different sampling rates?
The power consumption is 1.6mW at 200kHz, 0.54mW at 75kHz, and 0.06mW at 7.5kHz.
- What is the supply voltage range for the ADS7822E/250?
The supply voltage range is 2.7V to 5.25V.
- What is the range for the reference voltage?
The reference voltage can be set to any level within the range of 50mV to VCC.
- What are the package options available for the ADS7822E/250?
The package options include Mini-DIP-8, SO-8, and MSOP-8.
- How does the ADS7822E/250 handle power-down mode?
In power-down mode, the device consumes a maximum of 3 μA.
- What type of input does the ADS7822E/250 support?
The ADS7822E/250 supports a pseudo-differential input.
- What is the operating temperature range for the ADS7822E/250?
The operating temperature range is –40°C to +85°C.
- What are some typical applications for the ADS7822E/250?
Typical applications include battery-operated systems, remote data acquisition, simultaneous multichannel systems, and isolated data acquisition.
