Overview
The LTC2258CUJ-14 is a 14-bit 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 applications. It features a single 1.8V supply, low power consumption, and high AC performance, including 74dB Signal-to-Noise Ratio (SNR) and 88dB Spurious Free Dynamic Range (SFDR). The ultralow jitter of 0.17ps RMS enables undersampling of IF frequencies with excellent noise performance.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 14 | Bits |
| Sampling Rate | 65 | MSPS |
| Supply Voltage (Analog and Digital) | 1.7V to 1.9V | V |
| Power Consumption | 81mW / 49mW / 35mW | mW |
| SNR | 74dB | dB |
| SFDR | 88dB | dB |
| Integral Linearity Error (INL) | ±1LSB (typical) | LSB |
| Differential Linearity Error (DNL) | ±0.3LSB (typical) | LSB |
| Input Range | 1V P-P to 2V P-P | V P-P |
| Full-Power Bandwidth S/H | 800MHz | MHz |
| Output Modes | Full Rate CMOS, Double Data Rate CMOS, Double Data Rate LVDS | |
| Package | 40-Pin QFN (6mm x 6mm) | |
| Operating Temperature | 0°C to 70°C (or -40°C to 85°C for some versions) | °C |
Key Features
- High AC performance with 74dB SNR and 88dB SFDR.
- Ultralow jitter of 0.17ps RMS for excellent noise performance.
- Low power consumption: 81mW, 49mW, and 35mW.
- Single 1.8V supply.
- Selectable input ranges: 1V P-P to 2V P-P.
- 800MHz full-power bandwidth sample-and-hold (S/H).
- 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.
- Digital outputs available in full rate CMOS, double data rate CMOS, or double data rate LVDS.
- Separate output power supply allows CMOS output swing from 1.2V to 1.8V.
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 LTC2258CUJ-14 ADC?
The LTC2258CUJ-14 has a resolution of 14 bits.
- What are the sampling rates available for this ADC?
The LTC2258CUJ-14 operates at a sampling rate of 65 MSPS.
- What is the supply voltage range for this device?
The supply voltage range is from 1.7V to 1.9V for both analog and digital supplies.
- What are the power consumption levels of the LTC2258CUJ-14?
The power consumption levels are 81mW, 49mW, and 35mW.
- What are the key AC performance metrics of this ADC?
The key AC performance metrics include 74dB SNR and 88dB SFDR.
- What types of digital output modes are available?
The digital outputs can be configured as full rate CMOS, double data rate CMOS, or double data rate LVDS.
- What is the full-power bandwidth of the sample-and-hold (S/H) circuit?
The full-power bandwidth of the S/H circuit is 800MHz.
- Does the LTC2258CUJ-14 support any power management features?
Yes, it supports shutdown and nap modes for power management.
- How can the device be configured?
The device can be configured via a serial SPI port.
- What is the package type and size of the LTC2258CUJ-14?
The device is packaged in a 40-pin QFN (6mm x 6mm).
