Overview
The LTC2257IUJ-14#TRPBF is a 14-bit, 40Msps (mega-samples per second) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the LTC2257 family, designed for digitizing high-frequency, wide dynamic range signals. It is particularly suited for demanding communications applications due to its excellent AC performance, including high signal-to-noise ratio (SNR) and spurious free dynamic range (SFDR).
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 |
| Full-Power Bandwidth S/H | 800 MHz |
| 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 |
| Package | 40-Lead QFN (6mm x 6mm x 0.75mm) |
| Jitter | 0.17 ps RMS |
Key Features
- Ultralow jitter of 0.17 ps RMS, allowing for undersampling of IF frequencies with excellent noise performance.
- Optional data output randomizer and clock duty cycle stabilizer for high performance across various clock duty cycles.
- Shutdown and nap modes for power management.
- Serial SPI port for configuration.
- Pin compatible with 12-bit and 14-bit versions.
- Separate output power supply allowing CMOS output swing from 1.2 V to 1.8 V.
- Differential or single-ended inputs with support for sine wave, PECL, LVDS, TTL, or CMOS inputs.
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#TRPBF ADC?
The resolution of the LTC2257IUJ-14#TRPBF 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 types of digital outputs are supported by this ADC?
The ADC supports full rate CMOS, double data rate CMOS, and double data rate LVDS outputs. - What is the power consumption of this ADC?
The power consumption is 81 mW, 49 mW, or 35 mW depending on the mode. - What is the input range of this ADC?
The input range is from 1 V p-p to 2 V p-p. - Does this ADC support differential or single-ended inputs?
Yes, it supports both differential and single-ended inputs. - What are the supported input signal types?
The supported input signal types include sine wave, PECL, LVDS, TTL, and CMOS. - Is there an optional clock duty cycle stabilizer?
Yes, there is an optional clock duty cycle stabilizer for high performance across various clock duty cycles. - What is the package type of this ADC?
The package type is a 40-Lead QFN (6mm x 6mm x 0.75mm).
