Overview
The Texas Instruments ADS6149IRGZ25 is a high-performance 14-bit analog-to-digital converter (ADC) designed for high-speed data acquisition applications. This device is part of the ADS614X family and offers sampling rates up to 250 MSPS, making it suitable for demanding environments such as medical imaging, radar systems, and high-speed data acquisition.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Maximum Sample Rate | 250 | MSPS |
| Analog Input Range | Full-scale differential input voltage dependent on reference mode | |
| Output Interface | DDR LVDS and Parallel CMOS | |
| Supply Voltage (AVDD) | 3.3 | V |
| Supply Voltage (DRVDD) | 1.7 to 1.9 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Power Dissipation (Global Power Down) | Approx. 20 | mW |
| Power Dissipation (Standby) | Approx. 120 | mW |
Key Features
- Differential analog input with improved common-mode noise immunity and even order harmonic rejection.
- Support for internal or external reference modes, with the external reference mode allowing the full-scale input range to be controlled.
- Flexible output formats: DDR LVDS and parallel CMOS, with options for 2's complement and offset binary data formats.
- Low power modes including global power down, standby, and output buffer power down, reducing power dissipation significantly.
- Serial interface for register programming and diagnostic readout, with support for SCLK frequencies from 20 MHz down to low speeds.
- Internal R-C filter to absorb sampling glitches, with options for external filter configurations to support high input frequencies.
Applications
- Medical Imaging: High-speed data acquisition in MRI, CT scanners, and ultrasound systems.
- Radar Systems: High-speed ADCs are crucial for radar signal processing.
- Test and Measurement: Used in high-speed data acquisition systems for various testing applications.
- Communication Systems: Suitable for high-speed data conversion in communication equipment.
- Aerospace and Defense: High-performance ADCs are essential for various military and aerospace applications.
Q & A
- What is the maximum sampling rate of the ADS6149IRGZ25?
The maximum sampling rate is 250 MSPS.
- What are the output interface options for the ADS6149IRGZ25?
The device supports DDR LVDS and parallel CMOS output interfaces.
- How can the full-scale input range be controlled in the ADS6149IRGZ25?
The full-scale input range can be controlled in the external reference mode by setting the voltage on the VCM pin, which is buffered and gained internally.
- What are the power dissipation modes available for the ADS6149IRGZ25?
The device supports global power down, standby, and output buffer power down modes to reduce power dissipation.
- How is the serial interface used in the ADS6149IRGZ25?
The serial interface is used for register programming and diagnostic readout, with support for SCLK frequencies from 20 MHz down to low speeds.
- What is the purpose of the internal R-C filter in the ADS6149IRGZ25?
The internal R-C filter is used to absorb sampling glitches, with options for external filter configurations to support high input frequencies.
- What are the typical supply voltages for the ADS6149IRGZ25?
The typical supply voltages are 3.3 V for AVDD and 1.7 to 1.9 V for DRVDD.
- What is the operating temperature range for the ADS6149IRGZ25?
The operating temperature range is -40°C to 85°C.
- How can the device be configured using both serial and parallel interfaces?
The device can be configured using a combination of serial interface registers and parallel pin controls, with priority determined by a priority table.
- What is the wake-up time from global power down to normal mode?
The wake-up time from global power down to normal mode is typically 25 µs.
