Overview
The ADS42LB69IRGCT is a high-performance, dual-channel analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS42LBx9 family and is characterized by its 16-bit resolution and a maximum sampling rate of 250 MSPS. It features a buffered analog input with high impedance, which provides uniform input impedance across a wide frequency range and minimizes sample-and-hold glitch energy. The ADC supports both DDR (Double Data Rate) and QDR (Quad Data Rate) LVDS (Low-Voltage Differential Signaling) output interfaces, making it highly versatile for various high-speed applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Maximum Sampling Rate | 250 MSPS |
| Analog Input Range | 2 VPP or 2.5 VPP (programmable) |
| Input Clock Rate | Up to 250 MSPS |
| Output Interface | DDR or QDR LVDS, JESD204B |
| Power Consumption | 820 mW per channel |
| Aperture Jitter | 85 fs |
| Channel Isolation | 100 dB |
| 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) |
| Package | 64-pin VQFN (9-mm × 9-mm) |
| Operating Temperature | -40°C to +85°C |
Key Features
- Dual-channel operation with 16-bit resolution
- High-impedance analog input buffer
- Flexible input clock buffer with divide-by-1, -2, and -4 options
- SPI-programmable differential full-scale input range (2 VPP or 2.5 VPP)
- DDR or QDR LVDS output interface with JESD204B support
- Internal dither for improved noise performance
- Low power consumption of 820 mW per channel
- Excellent spurious-free dynamic range (SFDR) over a large input frequency range
Applications
- Communication and Cable Infrastructure
- Multi-Carrier, Multimode Cellular Receivers
- Radar and Smart Antenna Arrays
- Broadband Wireless Systems
- Test and Measurement Systems
- Software-Defined and Diversity Radios
- Microwave and Dual-Channel I/Q Receivers
- Repeaters and Power Amplifier Linearization
Q & A
- What is the maximum sampling rate of the ADS42LB69IRGCT? The maximum sampling rate is 250 MSPS.
- What are the available output interfaces for this ADC? The ADC supports DDR and QDR LVDS output interfaces, as well as JESD204B.
- What is the power consumption per channel? The power consumption is 820 mW per channel.
- What is the aperture jitter of the ADS42LB69IRGCT? The aperture jitter is 85 fs.
- What is the channel isolation of this ADC? The channel isolation is 100 dB.
- What are the typical SNR and SFDR values at 170 MHz input frequency? At 2 VPP input, the SNR is 73.2 dBFS, and the SFDR is -87 dBc (HD2 and HD3), -100 dBc (Non HD2 and HD3).
- What is the package type and size of the ADS42LB69IRGCT? The device is packaged in a 64-pin VQFN with a size of 9-mm × 9-mm.
- What is the operating temperature range of this ADC? The operating temperature range is -40°C to +85°C.
- Does the ADS42LB69IRGCT support internal dither? Yes, it does support internal dither for improved noise performance.
- What are some common applications of the ADS42LB69IRGCT? Common applications include communication and cable infrastructure, multi-carrier cellular receivers, radar and smart antenna arrays, and test and measurement systems.
