Overview
The ADS61B49IRGZ25 is a high-performance, 14-bit analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS61B49 family and is characterized by its high sampling rate of up to 250 million samples per second (MSPS). It features an integrated high impedance analog buffer, which enhances common-mode noise immunity and even-order harmonic rejection. The ADC supports both internal and programmable gain settings, allowing for flexible configuration to optimize performance parameters such as signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR).
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 14-bit | - |
| Sampling Rate | Up to 250 MSPS | - |
| Analog Input | Differential, high impedance buffer | - |
| Output Interface | DDR LVDS or parallel CMOS | - |
| Data Format | 2's complement or offset binary | - |
| Power Supply | AVDD = 3.3 V, DRVDD = 1.8 V | - |
| Power Consumption | Approx. 1.2 W at 250 MSPS | Typical values at 25°C |
| Operating Temperature | -40°C to 85°C | - |
| Package | 48-VQFN | - |
Key Features
- Integrated High Impedance Analog Buffer: Enhances common-mode noise immunity and even-order harmonic rejection.
- Programmable Gain Settings: Gain can be set from 0 dB to 6 dB in 0.5-dB steps to optimize SFDR and SNR performance.
- Internal Offset Correction: Algorithm estimates and corrects DC offset up to ±10 mV.
- Multiple Output Formats: Supports DDR LVDS and parallel CMOS output interfaces, with data formats in 2's complement or offset binary.
- Low Power Modes: Includes global power-down, standby, and output buffer disable modes to reduce power consumption.
- Flexible Clock Input: Can be driven differentially (sine, LVPECL, or LVDS) or single-ended (LVCMOS).
Applications
The ADS61B49IRGZ25 is suitable for a variety of high-speed data acquisition applications, including:
- Radar and Electronic Warfare Systems: High sampling rates and low noise make it ideal for radar and electronic warfare applications.
- Medical Imaging: Used in medical imaging equipment such as MRI and CT scanners due to its high resolution and speed.
- Test and Measurement Equipment: Suitable for high-speed data acquisition in test and measurement instruments.
- Communication Systems: Can be used in high-speed communication systems requiring precise and fast analog-to-digital conversion.
Q & A
- What is the maximum sampling rate of the ADS61B49IRGZ25?
The maximum sampling rate is up to 250 MSPS.
- What types of output interfaces does the ADS61B49IRGZ25 support?
The device supports DDR LVDS and parallel CMOS output interfaces.
- Can the gain of the ADS61B49IRGZ25 be adjusted?
- Does the ADS61B49IRGZ25 have internal offset correction?
- What are the power supply requirements for the ADS61B49IRGZ25?
The device requires AVDD = 3.3 V and DRVDD = 1.8 V.
- What is the operating temperature range of the ADS61B49IRGZ25?
The operating temperature range is -40°C to 85°C.
- What package type is the ADS61B49IRGZ25 available in?
The device is available in a 48-VQFN package.
- Can the clock input of the ADS61B49IRGZ25 be driven differentially or single-ended?
- Does the ADS61B49IRGZ25 have low power modes?
- What is the typical power consumption of the ADS61B49IRGZ25 at maximum sampling rate?
The typical power consumption is approximately 1.2 W at 250 MSPS.
