Overview
The ADS7844NB/1K, produced by Texas Instruments, is an 8-channel, 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface. This device is designed for low power consumption and high-speed operations, making it ideal for various applications including battery-operated systems, data acquisition, test and measurement, and industrial process control. The ADS7844 operates on a single supply voltage ranging from 2.7V to 5V and features a shutdown mode that reduces power dissipation to under 1µW. The device is available in 20-lead QSOP and SSOP packages and is guaranteed to operate over a temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12-bit | |
| Number of Channels | 8 (single-ended) or 4 (differential) | |
| Conversion Rate | Up to 200kHz | |
| Supply Voltage | 2.7V to 5V | V |
| Power Dissipation (typical at 200kHz) | 3mW | mW |
| Integral Linearity Error (INL) | ±1 LSB | LSB |
| Differential Linearity Error (DNL) | ±1 LSB | LSB |
| SINAD | 72dB | dB |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | 20-lead QSOP and SSOP |
Key Features
- Single supply operation: 2.7V to 5V
- 8-channel single-ended or 4-channel differential input
- Up to 200kHz conversion rate
- ±1 LSB maximum integral and differential linearity error
- No missing codes
- 72dB SINAD (Signal-to-Noise and Distortion Ratio)
- Synchronous serial interface
- Shutdown mode reducing power dissipation to under 1µW
- Available in 20-lead QSOP and SSOP packages
- Alternate source for MAX147
Applications
- Data acquisition
- Test and measurement
- Industrial process control
- Personal digital assistants
- Battery-powered systems
- Portable multichannel data loggers and measurement equipment
Q & A
- What is the resolution of the ADS7844NB/1K?
The ADS7844NB/1K has a 12-bit resolution.
- How many channels does the ADS7844NB/1K support?
The device supports 8 single-ended channels or 4 differential channels.
- What is the maximum conversion rate of the ADS7844NB/1K?
The maximum conversion rate is up to 200kHz.
- What is the supply voltage range for the ADS7844NB/1K?
The supply voltage range is from 2.7V to 5V.
- What is the typical power dissipation of the ADS7844NB/1K at 200kHz?
The typical power dissipation is 3mW at 200kHz.
- What is the operating temperature range of the ADS7844NB/1K?
The operating temperature range is –40°C to +85°C.
- What types of packages are available for the ADS7844NB/1K?
The device is available in 20-lead QSOP and SSOP packages.
- Does the ADS7844NB/1K have a shutdown mode?
Yes, the device has a shutdown mode that reduces power dissipation to under 1µW.
- What is the SINAD (Signal-to-Noise and Distortion Ratio) of the ADS7844NB/1K?
The SINAD is 72dB.
- What are some common applications of the ADS7844NB/1K?
Common applications include data acquisition, test and measurement, industrial process control, personal digital assistants, and battery-powered systems.
