Overview
The LTC2257IUJ-12 is a 12-bit, high-speed analog-to-digital converter (ADC) designed by Analog Devices Inc. This device is part of the LTC2257 series, which is optimized for digitizing high-frequency, wide dynamic range signals. It features excellent AC performance, including a signal-to-noise ratio (SNR) of 71.1dB and a spurious free dynamic range (SFDR) of 88dB. The ultralow jitter of 0.17ps RMS makes it suitable for undersampling IF frequencies with minimal noise distortion. The ADC operates on a single 1.8V supply and is available in a compact 40-pin QFN package, making it ideal for demanding communications and other high-performance applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Bits | 12 | |
| Sampling Rate | 40 Msps | |
| Input Type | Differential/Single-Ended | |
| Data Interface | LVDS - Parallel, Parallel | |
| Architecture | Pipeline | |
| Reference Type | Internal | |
| Analog Supply Voltage | 1.7V to 1.9V | V |
| Digital Supply Voltage | 1.7V to 1.9V | V |
| Operating Temperature | -40°C to 85°C | °C |
| Package/Case | 40-Pin QFN (6mm x 6mm x 0.75mm w/ EP) | |
| SNR | 71.1 dB | dB |
| SFDR | 88 dB | dB |
| Power Dissipation | 47 mW | mW |
| Integral Nonlinearity (INL) | ±0.3 LSB | LSB |
| Differential Nonlinearity (DNL) | ±0.1 LSB | LSB |
Key Features
- High AC Performance: 71.1dB SNR and 88dB SFDR.
- Low Power Consumption: 79mW/47mW/34mW in different modes.
- Single 1.8V Supply: Simplifies power management.
- Flexible Output Modes: Full rate CMOS, double data rate CMOS, or double data rate LVDS.
- Selectable Input Ranges: 1V P-P to 2V P-P.
- High-Speed Sampling: 800MHz full-power bandwidth sample-and-hold.
- Optional Features: Data output randomizer, clock duty cycle stabilizer, shutdown and nap modes.
- Serial SPI Port for Configuration: Easy configuration and control.
- Compact Package: 40-pin QFN (6mm x 6mm x 0.75mm w/ EP).
Applications
- Communications: Cellular base stations, software-defined radios.
- Portable Medical Imaging: High-resolution imaging applications.
- Multi-Channel Data Acquisition: High-speed data acquisition systems.
- Nondestructive Testing: High-precision testing applications.
- Smart Grid Technology: Advanced monitoring and control systems.
- Sonar Systems: High-frequency signal processing.
- Environmental Monitoring: Precise data collection and analysis.
Q & A
- What is the resolution of the LTC2257IUJ-12 ADC?
The LTC2257IUJ-12 is a 12-bit analog-to-digital converter.
- What is the sampling rate of the LTC2257IUJ-12?
The sampling rate of the LTC2257IUJ-12 is 40 Msps.
- What are the input types supported by the LTC2257IUJ-12?
The LTC2257IUJ-12 supports both differential and single-ended inputs.
- What are the available output modes for the LTC2257IUJ-12?
The available output modes are full rate CMOS, double data rate CMOS, and double data rate LVDS.
- What is the power supply voltage for the LTC2257IUJ-12?
The LTC2257IUJ-12 operates on a single 1.8V supply.
- What is the operating temperature range for the LTC2257IUJ-12?
The operating temperature range is -40°C to 85°C.
- What is the package type for the LTC2257IUJ-12?
The LTC2257IUJ-12 is packaged in a 40-pin QFN (6mm x 6mm x 0.75mm w/ EP).
- What are some key applications of the LTC2257IUJ-12?
Key applications include communications, cellular base stations, software-defined radios, portable medical imaging, multi-channel data acquisition, and nondestructive testing.
- Does the LTC2257IUJ-12 have any optional features?
Yes, it includes optional features such as a data output randomizer, clock duty cycle stabilizer, and shutdown and nap modes.
- How is the LTC2257IUJ-12 configured?
The LTC2257IUJ-12 can be configured using a serial SPI port.
