Overview
The LTC2257IUJ-14 is a 14-bit, 40Msps ultralow power analog-to-digital converter (ADC) designed by Analog Devices Inc. This ADC is optimized for digitizing high frequency, wide dynamic range signals, making it ideal for demanding communications and other high-performance applications. It operates on a single 1.8V supply and features low power consumption, with options for full rate CMOS, double data rate CMOS, or double data rate LVDS outputs. The device is housed in a 40-pin QFN package and supports various input ranges and configurations through its serial SPI port.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 14 | Bits |
| Sampling Rate | 40 | MSPS |
| Signal-to-Noise Ratio (SNR) | 74 | dB |
| Spurious Free Dynamic Range (SFDR) | 88 | dB |
| Power Consumption | 81mW / 49mW / 35mW | mW |
| Supply Voltage | 1.8V | V |
| Input Range | 1V P-P to 2V P-P | V |
| Full-Power Bandwidth | 800MHz | MHz |
| Output Modes | Full Rate CMOS, Double Data Rate CMOS, Double Data Rate LVDS | |
| Package Type | 40-Pin QFN (6mm x 6mm x 0.75mm w/ EP) |
Key Features
- Ultralow jitter of 0.17ps RMS, allowing for undersampling of IF frequencies with excellent noise performance.
- Integral Linearity Error (INL) and Differential Linearity Error (DNL) of ±1LSB and ±0.3LSB respectively.
- No missing codes over temperature.
- Low transition noise of 1.13LSB RMS.
- Optional data output randomizer and clock duty cycle stabilizer.
- Shutdown and nap modes for power management.
- Serial SPI port for configuration.
- Pin compatible with 14-bit and 12-bit versions.
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 LTC2257IUJ-14 ADC?
The LTC2257IUJ-14 has a resolution of 14 bits. - What are the sampling rates available for this ADC?
The LTC2257IUJ-14 operates at a sampling rate of 40 Msps. - What is the signal-to-noise ratio (SNR) of this ADC?
The SNR of the LTC2257IUJ-14 is 74 dB. - What are the output modes available for this ADC?
The digital outputs can be either full rate CMOS, double data rate CMOS, or double data rate LVDS. - What is the power consumption of this ADC?
The power consumption is 81mW, 49mW, or 35mW depending on the mode. - What is the input range for this ADC?
The input range is selectable from 1V P-P to 2V P-P. - Does this ADC support any power management features?
Yes, it supports shutdown and nap modes for power management. - How is the device configured?
The device can be configured through a serial SPI port. - What is the package type of this ADC?
The ADC is housed in a 40-pin QFN package (6mm x 6mm x 0.75mm w/ EP). - What are some typical applications of this ADC?
Typical applications include communications, cellular base stations, software defined radios, portable medical imaging, multi-channel data acquisition, and nondestructive testing.
