Overview
The LTC2268-14, produced by Analog Devices Inc., is a 2-channel, simultaneous sampling 14-bit analog-to-digital converter (ADC) designed for digitizing high frequency, wide dynamic range signals. This device is particularly suited for demanding communications applications, offering exceptional AC performance with a signal-to-noise ratio (SNR) of 73.1dB and a spurious free dynamic range (SFDR) of 88dB. The ultralow jitter of 0.15ps RMS enables undersampling of IF frequencies with excellent noise performance. The ADC features low power consumption, a single 1.8V supply, and serial LVDS outputs to minimize the number of data lines.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 14 | Bits |
| Sampling Frequency | 5 to 125 | MHz |
| SNR | 73.1 | dB |
| SFDR | 88 | dB |
| Jitter | 0.15 | ps RMS |
| Integral Linearity Error (INL) | ±1 LSB | |
| Differential Linearity Error (DNL) | ±0.3 LSB | |
| Analog Supply Current | 150 to 168 | mA |
| Digital Supply Current (2-Lane Mode) | 16 to 30 | mA |
| Power Dissipation (2-Lane Mode) | 299 to 324 | mW |
| Operating Temperature Range | 0°C to 70°C (Commercial), -40°C to 85°C (Industrial) | |
| Package | 40-Pin (6mm × 6mm) QFN |
Key Features
- 2-Channel Simultaneous Sampling ADC
- Low Power: 299mW total power consumption
- Single 1.8V Supply
- Serial LVDS Outputs: 1 or 2 Bits Per Channel
- Selectable Input Ranges: 1V P-P to 2V P-P
- 800MHz Full Power Bandwidth S/H
- Shutdown and Nap Modes
- Serial SPI Port for Configuration
- Pin Compatible 14-Bit and 12-Bit Versions
- Internal Clock Duty Cycle Stabilizer
Applications
- Communications
- Cellular Base Stations
- Software Defined Radios
- Portable Medical Imaging
- Multi-Channel Data Acquisition
- Nondestructive Testing
Q & A
- What is the resolution of the LTC2268-14 ADC?
The LTC2268-14 has a resolution of 14 bits. - What is the sampling frequency range of the LTC2268-14?
The sampling frequency range is from 5 MHz to 125 MHz. - What is the SNR of the LTC2268-14?
The SNR is 73.1 dB. - What is the SFDR of the LTC2268-14?
The SFDR is 88 dB. - What is the jitter performance of the LTC2268-14?
The jitter is 0.15 ps RMS. - What are the power consumption modes of the LTC2268-14?
The device has various power modes including shutdown and nap modes, with total power consumption as low as 299 mW. - What type of output does the LTC2268-14 use?
The device uses serial LVDS outputs. - Is the LTC2268-14 compatible with different input ranges?
Yes, it supports selectable input ranges from 1V P-P to 2V P-P. - What is the operating temperature range of the LTC2268-14?
The operating temperature range is 0°C to 70°C for commercial grade and -40°C to 85°C for industrial grade. - What package type is the LTC2268-14 available in?
The device is available in a 40-Pin (6mm × 6mm) QFN package.
