Overview
The LTC2265CUJ-14, produced by Analog Devices Inc., is a high-performance, 14-bit, dual-channel analog-to-digital converter (ADC) designed for digitizing high-frequency, wide dynamic range signals. This device is part of the LTC2265-14 series and is particularly suited for demanding communications applications. It features simultaneous sampling, low power consumption, and excellent AC performance, including a signal-to-noise ratio (SNR) of 73.7 dB and a spurious free dynamic range (SFDR) of 90 dB. The ADC operates on a single 1.8V supply and is available in a 40-pin QFN package.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 14 | bits |
| Number of Channels | 2 | |
| Sampling Rate | 65 | MS/s |
| SNR | 73.7 | dB |
| SFDR | 90 | dB |
| Integral Nonlinearity (INL) | ±1 | LSB |
| Differential Nonlinearity (DNL) | ±0.3 | LSB |
| Analog Supply Voltage | 1.7 to 1.9 | V |
| Power Dissipation | 171 | mW |
| Operating Temperature Range | 0°C to 70°C or -40°C to 85°C | |
| Package Type | 40-pin QFN (6mm x 6mm x 0.75mm w/ EP) |
Key Features
- Simultaneous Sampling: Both channels sample the input signals simultaneously, ensuring accurate and synchronized data capture.
- Low Power Consumption: The device operates at low power levels, with total power dissipation of 171mW and per-channel power of 85mW.
- High AC Performance: Features include 73.7dB SNR and 90dB SFDR, making it suitable for high-frequency applications.
- Serial LVDS Outputs: Outputs data in serial LVDS format, either one bit per channel or two bits per channel, to minimize data lines.
- Selectable Input Ranges: Supports input ranges from 1V P-P to 2V P-P.
- Full Power Bandwidth S/H: The sample-and-hold (S/H) circuit has a full power bandwidth of 800MHz.
- Shutdown and Nap Modes: Includes power-saving modes for reduced power consumption when not in active use.
- Serial SPI Port for Configuration: Allows for configuration and control via a serial SPI interface.
- Internal Clock Duty Cycle Stabilizer: Ensures high performance across a wide range of clock duty cycles.
Applications
The LTC2265CUJ-14 is particularly well-suited for demanding communications applications, such as:
- Wireless Communications: Ideal for baseband and IF signal processing in wireless communication systems.
- Test and Measurement Equipment: Used in high-speed data acquisition systems requiring precise and simultaneous sampling.
- Radar and Aerospace: Suitable for radar systems and other aerospace applications where high-frequency signal digitization is critical.
- Medical Imaging: Can be used in medical imaging equipment that requires high-resolution and high-speed data conversion.
Q & A
- What is the resolution of the LTC2265CUJ-14 ADC?
The LTC2265CUJ-14 has a resolution of 14 bits.
- How many channels does the LTC2265CUJ-14 support?
The device supports 2 simultaneous sampling channels.
- What is the sampling rate of the LTC2265CUJ-14?
The sampling rate is 65 MS/s.
- What is the signal-to-noise ratio (SNR) of the LTC2265CUJ-14?
The SNR is 73.7 dB.
- What is the spurious free dynamic range (SFDR) of the LTC2265CUJ-14?
The SFDR is 90 dB.
- What is the power consumption of the LTC2265CUJ-14?
The total power dissipation is 171 mW, with 85 mW per channel.
- What are the operating temperature ranges for the LTC2265CUJ-14?
The operating temperature ranges are 0°C to 70°C or -40°C to 85°C, depending on the model.
- What type of output interface does the LTC2265CUJ-14 use?
The device uses serial LVDS outputs.
- Does the LTC2265CUJ-14 support shutdown and nap modes?
Yes, it supports both shutdown and nap modes for power saving.
- How can the LTC2265CUJ-14 be configured?
The device can be configured via a serial SPI interface.
