Overview
The ADS7844EB/2K5 is a high-performance, 12-bit, 8-channel sampling analog-to-digital converter (ADC) produced by Texas Instruments. This device features a synchronous serial interface and is designed for low power consumption and high speed, making it ideal for battery-operated systems and various industrial applications. The ADS7844 operates from a single supply voltage of 2.7V to 5V and is available in 20-lead QSOP and SSOP packages. It is ensured to operate over a temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 12 | Bits | |||
| Number of Channels | 8 | ||||
| Conversion Rate | fSAMPLE = 200kHz, +VCC = +5V | 200 | kHz | ||
| Supply Voltage | 2.7 | 5 | V | ||
| Power Dissipation | fSAMPLE = 200kHz, +VCC = +5V | 3 | mW | ||
| Integral Non-Linearity (INL) | ±1 | LSB | |||
| Differential Non-Linearity (DNL) | ±1 | LSB | |||
| Signal-to-Noise and Distortion Ratio (SINAD) | fSAMPLE = 200kHz, +VCC = +5V | 72 | dB | ||
| Operating Temperature Range | –40 | +85 | °C | ||
| Package Type | QSOP-20, SSOP-20 |
Key Features
- Single supply operation: 2.7V to 5V
- 8-channel single-ended or 4-channel differential input
- Up to 200kHz conversion rate
- High accuracy: ±1 LSB INL and DNL, no missing codes
- Low power dissipation: 3mW at 200kHz throughput rate and +5V supply
- Shutdown mode reducing power dissipation to under 1µW
- Synchronous serial interface
- Onboard multiplexer and sample/hold function
- External reference voltage input (100mV to VCC)
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 ADS7844EB/2K5 ADC?
The ADS7844EB/2K5 has a resolution of 12 bits. - How many channels does the ADS7844EB/2K5 support?
The device supports 8 single-ended or 4 differential channels. - What is the maximum conversion rate of the ADS7844EB/2K5?
The maximum conversion rate is up to 200kHz. - What is the operating voltage range of the ADS7844EB/2K5?
The device operates from a single supply voltage of 2.7V to 5V. - What is the typical power dissipation of the ADS7844EB/2K5 at 200kHz conversion rate?
The typical power dissipation is 3mW at a 200kHz throughput rate and +5V supply. - Does the ADS7844EB/2K5 have a shutdown mode?
Yes, the device has a shutdown mode that reduces power dissipation to under 1µW. - What type of interface does the ADS7844EB/2K5 use?
The device uses a synchronous serial interface. - What is the operating temperature range of the ADS7844EB/2K5?
The operating temperature range is –40°C to +85°C. - What types of packages are available for the ADS7844EB/2K5?
The device is available in 20-lead QSOP and SSOP packages. - What are some common applications of the ADS7844EB/2K5?
Common applications include data acquisition, test and measurement, industrial process control, personal digital assistants, and battery-powered systems.
