Overview
The LTC2256CUJ-14 is a 14-bit, ultralow power analog-to-digital converter (ADC) designed by Analog Devices Inc. This device is part of the LTC2258-14/LTC2257-14/LTC2256-14 family, which are sampling ADCs optimized for digitizing high frequency, wide dynamic range signals. The LTC2256CUJ-14 is particularly suited for demanding communications applications due to its excellent AC performance and low power consumption.
Key Specifications
| Parameter | Minimum | Typical | Maximum |
|---|---|---|---|
| Analog Supply Voltage (VDD) | 1.7 V | 1.8 V | 1.9 V |
| Output Supply Voltage (OVDD) | 1.7 V | 1.8 V | 1.9 V |
| Analog Supply Current (IVDD) | 42 mA | 50 mA | 53 mA |
| Digital Supply Current (IOVDD) - 1-Lane Mode, 1.75mA | 10 mA | 18 mA | 19 mA |
| Power Dissipation - 1-Lane Mode, 1.75mA | 94 mW | 108 mW | 121 mW |
| Sample Rate | 25 Msps | - | - |
| Signal-to-Noise Ratio (SNR) | - | 74 dB | - |
| Spurious Free Dynamic Range (SFDR) | - | 88 dB | - |
| Integral Nonlinearity (INL) | - | ±1 LSB | - |
| Differential Nonlinearity (DNL) | - | ±0.3 LSB | - |
| Transition Noise | - | 1.13 LSB RMS | - |
Key Features
- 14-bit resolution with simultaneous sampling of two channels
- Sample rates of up to 25 Msps
- Ultralow power consumption: 94 mW total power at 25 Msps
- Single 1.8V supply voltage
- Serial CMOS or double data rate (DDR) CMOS/LVDS outputs
- Selectable input ranges: 1 Vpp to 2 Vpp
- 800 MHz full-power bandwidth sample-and-hold (S/H)
- Optional data output randomizer and clock duty cycle stabilizer
- Shutdown and nap modes for power reduction
- Serial SPI port for configuration
- Pin compatible with 14-bit and 12-bit versions
- 40-pin (6mm × 6mm) QFN package
Applications
- Communications systems
- Cellular base stations
- Software defined radios
- Portable medical imaging
- Multi-channel data acquisition
- Nondestructive testing
Q & A
- What is the resolution of the LTC2256CUJ-14 ADC?
The LTC2256CUJ-14 has a 14-bit resolution.
- What are the sample rates available for the LTC2256CUJ-14?
The LTC2256CUJ-14 can sample at rates up to 25 Msps.
- What is the power consumption of the LTC2256CUJ-14 at 25 Msps?
The total power consumption is 94 mW at 25 Msps.
- What are the input range options for the LTC2256CUJ-14?
The input ranges are selectable from 1 Vpp to 2 Vpp.
- Does the LTC2256CUJ-14 support different output modes?
Yes, it supports full rate CMOS, double data rate CMOS, and double data rate LVDS output modes.
- What is the full-power bandwidth of the sample-and-hold (S/H) circuit?
The full-power bandwidth of the S/H circuit is 800 MHz.
- Does the LTC2256CUJ-14 have power-saving modes?
Yes, it has shutdown and nap modes for power reduction.
- How is the LTC2256CUJ-14 configured?
It can be configured via a serial SPI port.
- What is the package type and size of the LTC2256CUJ-14?
The LTC2256CUJ-14 comes in a 40-pin (6mm × 6mm) QFN package.
- What are some typical applications of the LTC2256CUJ-14?
Typical applications include communications systems, cellular base stations, software defined radios, portable medical imaging, multi-channel data acquisition, and nondestructive testing.
