Overview
The ADS7822EB/250G4 from Texas Instruments is a 12-bit, microPower sampling analog-to-digital (A/D) converter. This device is designed to operate with very low power consumption, making it ideal for battery-operated systems and remote data acquisition modules. The ADS7822 features a high sampling rate of up to 200kHz and ensures specifications over a supply range of 2.7V to 5.25V. Its ultra-low power consumption and small size make it a versatile component for various applications requiring high precision and low power usage.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits |
| Sampling Rate | - | - | 200kHz | - |
| Power Consumption at 200kHz | - | - | 1.6mW | - |
| Power Consumption at 7.5kHz | - | - | 0.06mW | - |
| Power Down Current | - | - | 3μA | - |
| Supply Voltage Range | 2.7V | - | 5.25V | - |
| Integral Linearity Error | -2 | - | +2 | LSB |
| Differential Linearity Error | -1 | - | +1 | LSB |
| Noise | - | - | 33μVrms | - |
| Power-Supply Rejection | - | - | 82dB | - |
| Temperature Range | -40°C | - | +85°C | - |
Key Features
- High Sampling Rate: Up to 200kHz sampling rate.
- Low Power Consumption: Ultra-low power consumption, with 1.6mW at 200kHz and 0.06mW at 7.5kHz.
- Pseudo-Differential Input: Features a pseudo-differential input configuration.
- Serial Interface: Synchronous serial interface for data transfer.
- Reference Voltage Flexibility: Reference voltage can be set to any level within the range of 50mV to VCC.
- Power Down Mode: Low power-down current of 3μA.
- Small Package Options: Available in mini-DIP-8, SO-8, and MSOP-8 packages.
Applications
- Battery-Operated Systems: Ideal for battery-operated systems due to its ultra-low power consumption.
- Remote Data Acquisition: Suitable for remote data-acquisition modules.
- Simultaneous Sampling, Multichannel Systems: Can be used in simultaneous sampling and multichannel systems.
- Isolated Data Acquisition: Appropriate for isolated data acquisition applications.
Q & A
- What is the maximum sampling rate of the ADS7822?
The maximum sampling rate of the ADS7822 is up to 200kHz.
- What is the power consumption of the ADS7822 at 200kHz?
The power consumption at 200kHz is approximately 1.6mW.
- What is the power-down current of the ADS7822?
The power-down current is 3μA.
- What is the supply voltage range for the ADS7822?
The supply voltage range is from 2.7V to 5.25V.
- What type of input does the ADS7822 have?
The ADS7822 features a pseudo-differential input.
- What is the resolution of the ADS7822?
The resolution of the ADS7822 is 12 bits.
- What is the integral linearity error of the ADS7822?
The integral linearity error is ±2 LSB.
- What is the noise level of the ADS7822?
The noise level is approximately 33μVrms.
- What is the power-supply rejection ratio of the ADS7822?
The power-supply rejection ratio is 82dB.
- What are the package options for the ADS7822?
The ADS7822 is available in mini-DIP-8, SO-8, and MSOP-8 packages.
