Overview
The ADS7822U is a 12-bit sampling analog-to-digital (A/D) converter produced by Texas Instruments. This device is characterized by its ultra-low power consumption and high-speed operation, making it ideal for various applications requiring precise and efficient data conversion. The ADS7822U operates over a supply range of 2.7V to 5.25V and can be powered down to minimize power dissipation, with a maximum power-down current of 3µA. It features a synchronous serial interface and a pseudo-differential input, with the ability to set the reference voltage between 50mV and VCC. The device is available in mini-DIP-8, SO-8, and MSOP-8 packages, catering to different design requirements.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | Texas Instruments | Series | ADS7822 |
| Mounting Style | SMD/SMT | Resolution | 12 bit |
| Number of Channels | 1 Channel | Interface Type | 3-Wire |
| Sampling Rate | 200 kS/s | Input Type | Pseudo-Differential/Single-Ended |
| Architecture | SAR | Analog Supply Voltage | 2.7 V to 5.25 V |
| Digital Supply Voltage | 4.75 V to 5.25 V | Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +85°C | Brand | Texas Instruments |
| Development Kit | ADS7822EVM | DNL - Differential Nonlinearity | +/- 2 LSB |
| INL - Integral Nonlinearity | +/- 2 LSB | Moisture Sensitive | Yes |
| Number of Converters | 1 Converter | Operating Supply Voltage | 2.7 V to 3.6 V |
| Power Consumption | 1.6 mW | Reference Type | External |
| SINAD - Signal to Noise and Distortion Ratio | 71 dB | Factory Pack Quantity | 2500 |
| Supply Voltage - Max | 3.6 V | Supply Voltage - Min | 2.7 V |
Key Features
- 200kHz Sampling Rate
- Ultra-low power consumption:
- 1.6mW at 200kHz
- 0.54mW at 75kHz
- 0.06mW at 7.5kHz
- Power Down: 3µA max
- Available in mini-DIP-8, SO-8, and MSOP-8 packages
- Pseudo-Differential Input
- Synchronous Serial Interface
Applications
- Battery-Operated Systems
- Remote Data Acquisition
- Isolated Data Acquisition
- Simultaneous Sampling, Multichannel Systems
Q & A
- What is the resolution of the ADS7822U?
The ADS7822U has a resolution of 12 bits.
- What is the maximum sampling rate of the ADS7822U?
The maximum sampling rate is 200 kHz.
- What are the power consumption levels 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 ADS7822U?
The power-down current is 3µA max.
- What types of packages are available for the ADS7822U?
The device is available in mini-DIP-8, SO-8, and MSOP-8 packages.
- What is the input type of the ADS7822U?
The input type is pseudo-differential or single-ended.
- What is the operating temperature range of the ADS7822U?
The operating temperature range is -40°C to +85°C.
- Can the reference voltage be adjusted?
Yes, the reference voltage can be set to any level within the range of 50mV to VCC.
- What are some typical applications of the ADS7822U?
Typical applications include battery-operated systems, remote data acquisition, isolated data acquisition, and simultaneous sampling in multichannel systems.
- Does the ADS7822U require an external clock?
Yes, the ADS7822U requires an external clock for operation.
