Overview
The ADS42LB49IRGC25 is a high-linearity, dual-channel analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS42LBx9 family, which includes 14- and 16-bit resolution ADCs with a maximum sampling rate of 250 MSPS. The ADS42LB49 is designed to support DDR and QDR LVDS output interfaces, making it versatile for various high-speed data acquisition applications. The buffered analog input provides uniform input impedance across a wide frequency range, minimizing sample-and-hold glitch energy and ensuring high dynamic performance.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | 14- and 16-bit | |
| Maximum Clock Rate | 250 MSPS | |
| Analog Input | Differential, High Impedance Input Buffer | |
| Input Voltage Range | 2 VPP and 2.5 VPP (SPI-Programmable) | |
| Output Interface | DDR or QDR LVDS | |
| Package | 64-Pin VQFN (9-mm × 9-mm) | |
| Power Dissipation | 820 mW/ch | |
| Aperture Jitter | 85 fs | |
| Channel Isolation | 100 dB | |
| Operating Temperature Range | -40°C to 85°C | |
| SNR at fIN = 170 MHz, 2 VPP | 73.2 dBFS | |
| SFDR at fIN = 170 MHz, 2 VPP | 87 dBc (HD2 and HD3), 100 dBc (Non HD2 and HD3) | |
| SNR at fIN = 170 MHz, 2.5 VPP | 74.9 dBFS | |
| SFDR at fIN = 170 MHz, 2.5 VPP | 85 dBc (HD2 and HD3), 97 dBc (Non HD2 and HD3) |
Key Features
- Dual-channel operation with 14- and 16-bit resolution
- Maximum sampling rate of 250 MSPS
- Analog input buffer with high impedance input
- Flexible input clock buffer with divide-by-1, -2, and -4 options
- 2 VPP and 2.5 VPP differential full-scale input (SPI-programmable)
- DDR or QDR LVDS output interface
- 64-Pin VQFN package (9-mm × 9-mm)
- Internal dither for improved noise performance
- Channel isolation of 100 dB
- Low power dissipation of 820 mW per channel
Applications
- Microwave and dual-channel I/Q receivers
- Repeaters
- Power amplifier linearization
- Wireless communications infrastructure
- Software-defined radio
- Multi-carrier, wide bandwidth communications applications
Q & A
- What is the maximum sampling rate of the ADS42LB49?
The maximum sampling rate of the ADS42LB49 is 250 MSPS.
- What are the available resolutions for the ADS42LB49?
The ADS42LB49 is available in 14- and 16-bit resolutions.
- What type of output interface does the ADS42LB49 support?
The ADS42LB49 supports DDR and QDR LVDS output interfaces.
- What is the power dissipation per channel for the ADS42LB49?
The power dissipation per channel for the ADS42LB49 is 820 mW.
- What is the aperture jitter of the ADS42LB49?
The aperture jitter of the ADS42LB49 is 85 fs.
- What is the channel isolation of the ADS42LB49?
The channel isolation of the ADS42LB49 is 100 dB.
- What is the operating temperature range of the ADS42LB49?
The operating temperature range of the ADS42LB49 is -40°C to 85°C.
- What are the typical SNR and SFDR values at 170 MHz input frequency for the ADS42LB49?
At 170 MHz input frequency, the SNR is 73.2 dBFS and 74.9 dBFS for 2 VPP and 2.5 VPP respectively. The SFDR is 87 dBc (HD2 and HD3) and 100 dBc (Non HD2 and HD3) for 2 VPP, and 85 dBc (HD2 and HD3) and 97 dBc (Non HD2 and HD3) for 2.5 VPP.
- What package type and size does the ADS42LB49 come in?
The ADS42LB49 comes in a 64-Pin VQFN package with a size of 9-mm × 9-mm.
- What are some common applications of the ADS42LB49?
The ADS42LB49 is commonly used in microwave and dual-channel I/Q receivers, repeaters, power amplifier linearization, wireless communications infrastructure, and software-defined radio applications.
