Overview
The ADS4249IRGCT is a dual-channel, 14-bit analog-to-digital converter (ADC) produced by Texas Instruments. It is part of the ADS42xx family, known for its ultra-low power consumption and high dynamic performance. This ADC operates at a maximum sample rate of 250 MSPS and is powered by a single 1.8-V supply, consuming only 560 mW at full speed. The device is designed to achieve high dynamic performance, making it well-suited for multi-carrier, wide-bandwidth communications applications. It features a compact 9-mm × 9-mm, 64-pin VQFN (RGC) package and is specified over the industrial temperature range of –40°C to 85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14 Bits | |
| Maximum Sample Rate | 250 | MSPS |
| Power Consumption | 560 | mW |
| Supply Voltage | 1.8 | V |
| Signal-to-Noise Ratio (SNR) at 170 MHz | 71.7 | dBFS |
| Spurious-Free Dynamic Range (SFDR) at 170 MHz | 80 | dBc |
| Crosstalk at 185 MHz | > 90 | dB |
| Programmable Gain | Up to 6 dB | |
| Output Interface | 1.8-V Parallel CMOS, DDR LVDS | |
| LVDS Swing Options | Standard: 350 mV, Low: 200 mV | |
| Package | 9-mm × 9-mm, 64-Pin VQFN (RGC) | |
| Operating Temperature Range | –40°C to 85°C |
Key Features
- Ultra-Low Power Consumption: Operates with a single 1.8-V supply, consuming 560 mW at 250 MSPS.
- High Dynamic Performance: Achieves 71.7 dBFS SNR and 80 dBc SFDR at 170 MHz.
- Programmable Gain: Up to 6 dB for SNR/SFDR trade-off.
- DC Offset Correction: Includes a dc offset correction loop to cancel the ADC offset.
- Output Interface Options: Supports 1.8-V parallel CMOS and DDR LVDS with programmable swing (350 mV and 200 mV).
- Low Input Clock Amplitude: Supports clock amplitudes down to 200 mVPP.
- Internal References: Eliminates traditional reference pins and associated decoupling capacitors.
Applications
- Wireless Communications Infrastructure: Suitable for multi-carrier, wide-bandwidth communications.
- Software Defined Radios (SDRs): High dynamic performance makes it ideal for SDR applications.
- Power Amplifier Linearization: Can be used to improve the linearity of power amplifiers in various communication systems.
Q & A
- What is the maximum sample rate of the ADS4249IRGCT?
The maximum sample rate is 250 MSPS.
- What is the power consumption of the ADS4249IRGCT at 250 MSPS?
The power consumption is 560 mW at 250 MSPS.
- What are the output interface options for the ADS4249IRGCT?
The device supports 1.8-V parallel CMOS and DDR LVDS with programmable swing.
- Does the ADS4249IRGCT have internal references?
Yes, it includes internal references and eliminates traditional reference pins and associated decoupling capacitors.
- What is the operating temperature range of the ADS4249IRGCT?
The operating temperature range is –40°C to 85°C.
- What is the SFDR of the ADS4249IRGCT at 170 MHz?
The SFDR is 80 dBc at 170 MHz.
- Can the gain of the ADS4249IRGCT be programmed?
Yes, the gain can be programmed up to 6 dB for SNR/SFDR trade-off.
- What is the package type and size of the ADS4249IRGCT?
The package is a 9-mm × 9-mm, 64-Pin VQFN (RGC).
- Does the ADS4249IRGCT support low input clock amplitudes?
Yes, it supports clock amplitudes down to 200 mVPP.
- What are some typical applications of the ADS4249IRGCT?
Typical applications include wireless communications infrastructure, software defined radios, and power amplifier linearization.
