Overview
The LTC2257CUJ-12 is a high-performance, 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is designed for digitizing high-frequency, wide dynamic range signals, making it ideal for demanding communications applications. The ADC operates on a single 1.8V supply and features a pipelined architecture, ensuring low power consumption and high accuracy.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12 | Bits |
| Sampling Rate | 40 | Msps |
| Number of Channels | 1 | - |
| Input Type | Differential/Single-Ended | - |
| Architecture | Pipelined | - |
| Reference Type | External, Internal | - |
| Analog Supply Voltage | 1.7 V ~ 1.9 V | V |
| Digital Supply Voltage | 1.7 V ~ 1.9 V | V |
| Operating Temperature | 0°C ~ 70°C | °C |
| Package | 40-WFQFN Exposed Pad | - |
| SNR | 71.1 dB | dB |
| SFDR | 88 dB | dB |
| Power Consumption | 79 mW (typical) | mW |
Key Features
- High signal-to-noise ratio (SNR) of 71.1 dB and spurious free dynamic range (SFDR) of 88 dB.
- Low power consumption: 79 mW, 47 mW, and 34 mW for different operating modes.
- Single 1.8V supply voltage.
- CMOS, double data rate CMOS, or double data rate LVDS digital outputs.
- Selectable input ranges: 1V P-P to 2V P-P.
- 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 management.
- Serial SPI port for configuration.
- Pin-compatible 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 LTC2257CUJ-12 ADC? The resolution is 12 bits.
- What is the maximum sampling rate of the LTC2257CUJ-12? The maximum sampling rate is 40 Msps.
- What types of digital outputs does the LTC2257CUJ-12 support? It supports full rate CMOS, double data rate CMOS, and double data rate LVDS outputs.
- What is the operating voltage range for the LTC2257CUJ-12? The operating voltage range is 1.7 V to 1.9 V for both analog and digital supplies.
- What are the key applications of the LTC2257CUJ-12? Key applications include communications systems, cellular base stations, software defined radios, portable medical imaging, multi-channel data acquisition, and nondestructive testing.
- Does the LTC2257CUJ-12 have power-saving modes? Yes, it has shutdown and nap modes for power management.
- What is the package type of the LTC2257CUJ-12? The package type is a 40-pin QFN (6mm × 6mm) with an exposed pad.
- What is the SNR and SFDR of the LTC2257CUJ-12? The SNR is 71.1 dB and the SFDR is 88 dB.
- Can the input of the LTC2257CUJ-12 be driven differentially or single-ended? Yes, the input can be driven differentially or single-ended with various input types such as sine wave, PECL, LVDS, TTL, or CMOS.
- Is there an optional clock duty cycle stabilizer available for the LTC2257CUJ-12? Yes, there is an optional clock duty cycle stabilizer to ensure high performance over a wide range of clock duty cycles.
