Overview
The ADS4249IRGCR from Texas Instruments is a dual-channel, 14-bit analog-to-digital converter (ADC) designed for optimal performance in multi-carrier, wide-bandwidth communications applications. This device is part of TI's ultralow-power family of ADCs, offering high dynamic performance while consuming extremely low power. The ADS4249IRGCR operates on a single 1.8-V supply and is housed in a compact 9-mm × 9-mm, 64-pin VQFN PowerPAD package. It features programmable gain options, a dc offset correction loop, and both double data rate (DDR) LVDS and parallel CMOS digital output interfaces. The device is specified over the industrial temperature range of –40°C to 85°C, making it suitable for a variety of demanding applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14 bits | |
| Number of Channels | 2 | |
| Sampling Rate | 250 MS/s | |
| Input Type | Differential | |
| Analog Supply Voltage | 1.7 V to 1.9 V | V |
| Digital Supply Voltage | 1.7 V to 1.9 V | V |
| SNR - Signal to Noise Ratio | 72.8 dB | dB |
| Minimum Operating Temperature | –40°C | °C |
| Maximum Operating Temperature | +85°C | °C |
| DNL - Differential Nonlinearity | ±1.7 LSB | LSB |
| ENOB - Effective Number of Bits | 11.7 bits | bits |
| SFDR - Spurious Free Dynamic Range | 80 dB | dB |
| SINAD - Signal to Noise and Distortion Ratio | 72 dB | dB |
| Power Consumption | 470 mW | mW |
| Package | 9-mm × 9-mm, 64-pin VQFN PowerPAD |
Key Features
- High Dynamic Performance: The ADS4249IRGCR offers high dynamic performance with an SNR of 71.7 dBFS and an SFDR of 80 dBc at 170 MHz.
- Ultra-Low Power Consumption: Operates on a single 1.8-V supply with total power consumption of 470 mW at 250 MSPS.
- Programmable Gain: Features programmable gain up to 6 dB for SNR/SFDR trade-off.
- DC Offset Correction: Includes a dc offset correction loop to cancel ADC offset.
- Output Interface Options: Supports both DDR LVDS and parallel CMOS digital output interfaces with programmable swing.
- Internal References: Eliminates traditional reference pins with internal references, simplifying the design process).
- Compact Package: Housed in a compact 9-mm × 9-mm, 64-pin VQFN PowerPAD package).
Applications
- Wireless Communications Infrastructure: Suitable for multi-carrier, wide-bandwidth communications applications).
- Software Defined Radios (SDRs): Ideal for SDR applications due to its high dynamic performance and low power consumption).
- Power Amplifier Linearization: Can be used in power amplifier linearization systems to improve efficiency and linearity).
Q & A
- What is the resolution of the ADS4249IRGCR?
The resolution of the ADS4249IRGCR is 14 bits).
- How many channels does the ADS4249IRGCR have?
The ADS4249IRGCR is a dual-channel ADC).
- What is the maximum sampling rate of the ADS4249IRGCR?
The maximum sampling rate of the ADS4249IRGCR is 250 MS/s).
- What type of input does the ADS4249IRGCR support?
The ADS4249IRGCR supports differential analog inputs).
- What is the operating supply voltage range of the ADS4249IRGCR?
The operating supply voltage range is 1.7 V to 1.9 V).
- What are the output interface options for the ADS4249IRGCR?
The ADS4249IRGCR supports both DDR LVDS and parallel CMOS digital output interfaces).
- Does the ADS4249IRGCR have internal references?
Yes, the ADS4249IRGCR has internal references, eliminating the need for traditional reference pins).
- What is the package type and size of the ADS4249IRGCR?
The ADS4249IRGCR is housed in a 9-mm × 9-mm, 64-pin VQFN PowerPAD package).
- What are the typical applications of the ADS4249IRGCR?
The ADS4249IRGCR is typically used in wireless communications infrastructure, software defined radios, and power amplifier linearization).
- What is the power consumption of the ADS4249IRGCR at 250 MSPS?
The power consumption of the ADS4249IRGCR at 250 MSPS is approximately 470 mW).
