Overview
The ADS7822EC/250 is a 12-bit sampling analog-to-digital (A/D) converter produced by Texas Instruments. This device is characterized by its high-speed and ultra-low power consumption, making it ideal for various applications requiring precise analog-to-digital conversion. The ADS7822 operates over a supply range of 2.7V to 5.25V and features a pseudo-differential input, a synchronous serial interface, and the ability to set the reference voltage between 50mV and VCC. Its compact packaging options include mini-DIP-8, SO-8, and MSOP-8, enhancing its suitability for space-constrained designs.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits | |
| Sampling Rate | 200kHz | ||||
| Power Consumption at 200kHz | 1.6mW | ||||
| Power Consumption at 75kHz | 0.54mW | ||||
| Power Consumption at 7.5kHz | 0.06mW | ||||
| Power Down Current | 3µA | ||||
| Operating Temperature Range | -40°C | 85°C | °C | ||
| Full-Scale Input Span | +In - (-In) | 0 | VREF | V | |
| Absolute Input Range (+In) | -0.2 | VCC + 0.2 | V | ||
| Absolute Input Range (-In) | -0.2 | +1.0 | V | ||
| Input Capacitance | 25 | 25 | 25 | pF | |
| Input Leakage Current | ±1 | ±1 | ±1 | µA | |
| Integral Linearity Error | -2 | +2 | LSB | ||
| Differential Linearity Error | ±0.8 | ±0.8 | LSB |
Key Features
- High-speed sampling rate of up to 200kHz
- Ultra-low power consumption: 1.6mW at 200kHz, 0.54mW at 75kHz, and 0.06mW at 7.5kHz
- Power-down mode with a maximum current of 3µA
- Pseudo-differential input
- Synchronous serial interface
- Reference voltage can be set between 50mV and VCC
- Available in mini-DIP-8, SO-8, and MSOP-8 packages
- Operating temperature range of -40°C to 85°C
Applications
- Battery-operated systems
- Remote data acquisition
- Isolated data acquisition
- Simultaneous sampling, multichannel systems
Q & A
- What is the resolution of the ADS7822EC/250?
The ADS7822EC/250 has a resolution of 12 bits.
- What are the typical power consumption values for the ADS7822EC/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 power-down current of the ADS7822EC/250?
The power-down current is a maximum of 3µA.
- What types of packages are available for the ADS7822EC/250?
The device is available in mini-DIP-8, SO-8, and MSOP-8 packages.
- What is the operating temperature range of the ADS7822EC/250?
The operating temperature range is -40°C to 85°C.
- Can the reference voltage be adjusted for the ADS7822EC/250?
Yes, the reference voltage can be set to any level between 50mV and VCC.
- What kind of input does the ADS7822EC/250 have?
The device features a pseudo-differential input.
- What is the interface type of the ADS7822EC/250?
The device has a synchronous serial interface.
- What are some common applications for the ADS7822EC/250?
Common applications include battery-operated systems, remote data acquisition, isolated data acquisition, and simultaneous sampling in multichannel systems.
- How does the ADS7822EC/250 handle input capacitance and leakage current?
The input capacitance is 25 pF, and the input leakage current is ±1 µA.
