Overview
The LTC2261-14, produced by Analog Devices Inc., is a high-performance 14-bit analog-to-digital converter (ADC) designed for digitizing high-frequency, wide dynamic range signals. This ultra-low power ADC is particularly suited for demanding communications applications, offering exceptional AC performance with a signal-to-noise ratio (SNR) of 73.4dB and a spurious free dynamic range (SFDR) of 85dB. The device features ultralow jitter of 0.17ps RMS, enabling the undersampling of IF frequencies with excellent noise performance.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Bits | 14 | |
| Sampling Rate | 125 Msps | |
| Signal-to-Noise Ratio (SNR) | 73.4 dB | |
| Spurious Free Dynamic Range (SFDR) | 85 dB | |
| Jitter | 0.17 ps RMS | |
| Analog Supply Voltage | 1.7 V to 1.9 V | V |
| Power Consumption | 127 mW / 106 mW / 89 mW | mW |
| Output Types | CMOS, DDR CMOS, DDR LVDS | |
| Input Range | 1 Vpp to 2 Vpp | Vpp |
| Full-Power Bandwidth S/H | 800 MHz | MHz |
| Package Type | 40-Pin (6mm × 6mm) QFN | |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- Ultra-low power consumption: 127mW, 106mW, and 89mW at different sampling rates.
- Single 1.8V supply voltage.
- CMOS, DDR CMOS, or DDR LVDS output options.
- Selectable input ranges: 1Vpp to 2Vpp.
- 800MHz full-power bandwidth sample-and-hold (S/H).
- Optional data output randomizer and clock duty cycle stabilizer.
- Shutdown and nap modes for power management.
- Serial SPI port for configuration.
- Pin-compatible 14-bit and 12-bit versions.
Applications
- Communications systems.
- Cellular base stations.
- Software-defined radios.
- Portable medical imaging.
- Multi-channel data acquisition.
- Nondestructive testing.
Q & A
- What is the resolution of the LTC2261-14 ADC?
The LTC2261-14 is a 14-bit analog-to-digital converter.
- What is the maximum sampling rate of the LTC2261-14?
The maximum sampling rate is 125 Msps.
- What are the typical SNR and SFDR values for the LTC2261-14?
The SNR is 73.4 dB, and the SFDR is 85 dB.
- What is the jitter performance of the LTC2261-14?
The jitter is 0.17 ps RMS.
- What are the available output types for the LTC2261-14?
The output types include CMOS, DDR CMOS, and DDR LVDS.
- What is the full-power bandwidth of the sample-and-hold (S/H) circuit?
The full-power bandwidth is 800 MHz.
- Does the LTC2261-14 support different input ranges?
Yes, the input range is selectable from 1 Vpp to 2 Vpp.
- What are the power management features of the LTC2261-14?
The device includes shutdown and nap modes for power management.
- How is the LTC2261-14 configured?
Configuration is done via a serial SPI port.
- What is the package type and size of the LTC2261-14?
The package is a 40-Pin (6mm × 6mm) QFN.
