Overview
The ADS61B49IRGZR from Texas Instruments is a high-performance, 14-bit analog-to-digital converter (ADC) designed for applications requiring high dynamic performance and low power consumption. This device operates at a maximum sampling rate of 250 MSPS and features an integrated high impedance analog input buffer, which maintains constant performance and input impedance across a wide frequency range. The ADC is packaged in a compact 48-QFN package, making it suitable for a variety of high-speed applications. It supports both double data rate (DDR) LVDS and parallel CMOS digital output interfaces and includes internal references, eliminating the need for traditional reference pins and associated decoupling capacitors.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 14-bit (ADS61B49), 12-bit (ADS61B29) |
| Maximum Sample Rate | 250 MSPS |
| Total Power Dissipation at 250 MSPS | 790 mW |
| Output Interfaces | Double Data Rate (DDR) LVDS and Parallel CMOS |
| Package | 48-QFN (7mm × 7mm) |
| Operating Temperature Range | -40°C to 85°C |
| Input Clock Amplitude | Down to 400 mVpp Differential |
| Programmable Fine Gain | Up to 6 dB for SNR/SFDR Trade-Off |
| DC Offset Correction | Available |
Key Features
- Integrated High Impedance Analog Input Buffer
- Maximum Sample Rate of 250 MSPS
- 14-Bit Resolution (ADS61B49) and 12-Bit Resolution (ADS61B29)
- Double Data Rate (DDR) LVDS and Parallel CMOS Output Options
- Programmable Fine Gain up to 6 dB for SNR/SFDR Trade-Off
- DC Offset Correction Loop
- Internal References with No Traditional Reference Pins or Decoupling Capacitors
- Power-Down Modes: Global, Standby, and Output Buffer Disable
- Low Power Consumption with Automatic Power Scaling at Lower Sampling Rates
Applications
- Multicarrier, Wide Bandwidth Communications
- Wireless Multi-Carrier Communications Infrastructure
- Software Defined Radio
- Power Amplifier Linearization Feedback ADC
- 802.16d/e
- Test and Measurement Instrumentation
- High Definition Video
- Medical Imaging
- Radar Systems
Q & A
- What is the maximum sampling rate of the ADS61B49IRGZR?
The maximum sampling rate of the ADS61B49IRGZR is 250 MSPS.
- What are the output interface options available for the ADS61B49IRGZR?
The ADS61B49IRGZR supports both Double Data Rate (DDR) LVDS and Parallel CMOS output interfaces.
- Does the ADS61B49IRGZR have an integrated analog input buffer?
Yes, the ADS61B49IRGZR features an integrated high impedance analog input buffer.
- What is the operating temperature range of the ADS61B49IRGZR?
The operating temperature range is -40°C to 85°C.
- Can the ADS61B49IRGZR operate in power-down modes?
Yes, the device supports global power-down, standby, and output buffer disable modes.
- What are the typical applications of the ADS61B49IRGZR?
Typical applications include multicarrier communications, software defined radio, test and measurement instrumentation, high definition video, medical imaging, and radar systems.
- How does the ADS61B49IRGZR handle DC offset correction?
The device includes a DC offset correction loop to cancel the ADC offset.
- What is the package type and size of the ADS61B49IRGZR?
The device is packaged in a 48-QFN package with dimensions of 7mm × 7mm.
- Does the ADS61B49IRGZR support programmable fine gain?
Yes, the device supports programmable fine gain up to 6 dB for SNR/SFDR trade-off.
- How does the power consumption of the ADS61B49IRGZR change at lower sampling rates?
The device automatically operates at scaled-down power with no loss in performance at lower sampling rates.
