Overview
The LTC2257CUJ-14#PBF is a 14-bit, 40Msps (mega-samples per second) pipelined analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for digitizing high-frequency, wide dynamic range signals, making it ideal for demanding communications and other high-performance applications. It features ultralow jitter, high signal-to-noise ratio (SNR), and spurious free dynamic range (SFDR), ensuring excellent noise performance and accuracy.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 40 Msps |
| Signal-to-Noise Ratio (SNR) | 74 dB |
| Spurious Free Dynamic Range (SFDR) | 88 dB |
| Jitter | 0.17 ps RMS |
| Power Consumption | 81 mW / 49 mW / 35 mW |
| Supply Voltage | Single 1.8 V |
| Output Types | CMOS, DDR CMOS, DDR LVDS |
| Input Range | 1 V P-P to 2 V P-P |
| Full-Power Bandwidth S/H | 800 MHz |
| Package | 40-Lead QFN (6mm x 6mm x 0.75mm) |
Key Features
- Ultralow jitter of 0.17 ps RMS for excellent noise performance in undersampling applications.
- High AC performance with 74 dB SNR and 88 dB SFDR.
- Low power consumption: 81 mW, 49 mW, and 35 mW.
- Single 1.8 V supply voltage.
- Selectable digital outputs: full rate CMOS, double data rate CMOS, or double data rate LVDS.
- Optional data output randomizer and clock duty cycle stabilizer.
- Shutdown and nap modes for power management.
- Serial SPI port for configuration.
- Pin compatible with 12-bit and 14-bit versions.
Applications
- Communications systems.
- Cellular base stations.
- Software defined radios.
- Portable medical imaging devices.
- Multi-channel data acquisition systems.
- Nondestructive testing equipment.
Q & A
- What is the resolution of the LTC2257CUJ-14#PBF ADC?
The resolution of the LTC2257CUJ-14#PBF is 14 bits.
- What is the sampling rate of this ADC?
The sampling rate is 40 Msps.
- What are the key AC performance metrics of this ADC?
The key AC performance metrics include a 74 dB SNR and an 88 dB SFDR.
- What is the power consumption of this device?
The power consumption is 81 mW, 49 mW, and 35 mW depending on the mode.
- What types of digital outputs are available?
The digital outputs can be full rate CMOS, double data rate CMOS, or double data rate LVDS.
- Does this ADC support differential or single-ended inputs?
Yes, the ENC+ and ENC- inputs may be driven differentially or single-ended with various input types such as sine wave, PECL, LVDS, TTL, or CMOS.
- What is the package type and dimensions of the LTC2257CUJ-14#PBF?
The package is a 40-Lead QFN with dimensions of 6mm x 6mm x 0.75mm.
- Are there any optional features available for this ADC?
Yes, optional features include a data output randomizer and a clock duty cycle stabilizer.
- What are some common applications for this ADC?
Common applications include communications systems, cellular base stations, software defined radios, portable medical imaging, multi-channel data acquisition, and nondestructive testing.
- Is there a serial interface for configuration?
Yes, the device includes a serial SPI port for configuration.
