Overview
The LTC2242-12, produced by Analog Devices Inc., is a high-performance 12-bit analog-to-digital converter (ADC) designed to digitize high-frequency, wide dynamic range signals. This ADC operates at a sample rate of 250 Msps, making it ideal for demanding communications applications. It features excellent AC performance, including a signal-to-noise ratio (SNR) of 65.4 dB and a spurious free dynamic range (SFDR) of 78 dB. The ultralow jitter of 95 fs RMS enables IF undersampling with superior noise performance. The device is powered by a single 2.5V supply and offers low power dissipation of 740 mW, along with shutdown and nap modes for power management.
Key Specifications
| Parameter | Value |
|---|---|
| Sample Rate | 250 Msps |
| Resolution | 12 bits |
| SNR | 65.4 dB |
| SFDR | 78 dB |
| Full Power Bandwidth S/H | 1.2 GHz |
| Supply Voltage | 2.5 V |
| Power Dissipation | 740 mW |
| Output Formats | LVDS, CMOS, or Demultiplexed CMOS |
| Input Ranges | ±0.5 V or ±1 V |
| Integral Non-Linearity (INL) | ±1.0 LSB (typ) |
| Differential Non-Linearity (DNL) | ±0.4 LSB (typ) |
| Package | 64-Pin 9mm × 9mm QFN |
Key Features
- Ultralow jitter of 95 fs RMS for excellent noise performance in IF undersampling.
- No missing codes over temperature.
- Optional clock duty cycle stabilizer for high performance across a wide range of clock duty cycles.
- Shutdown and nap modes for power management.
- Data ready output clock.
- Pin compatible family with various sample rates and resolutions.
- Separate output power supply allowing CMOS output swing from 0.5 V to 2.625 V.
- Three format options for CMOS outputs: single bus at full data rate or two demultiplexed buses at half data rate.
Applications
- Wireless and Wired Broadband Communication
- Cable Head-End Systems
- Power Amplifier Linearization
- Communications Test Equipment
Q & A
- What is the sample rate of the LTC2242-12 ADC?
The sample rate of the LTC2242-12 ADC is 250 Msps. - What are the key AC performance metrics of the LTC2242-12?
The key AC performance metrics include a SNR of 65.4 dB and an SFDR of 78 dB. - What is the power dissipation of the LTC2242-12?
The power dissipation is 740 mW. - What are the available output formats for the LTC2242-12?
The available output formats are LVDS, CMOS, or demultiplexed CMOS. - What are the input range options for the LTC2242-12?
The input range options are ±0.5 V or ±1 V. - Does the LTC2242-12 have any power management features?
Yes, it has shutdown and nap modes for power management. - What is the package type of the LTC2242-12?
The package type is a 64-Pin 9mm × 9mm QFN. - What is the typical INL and DNL for the LTC2242-12?
The typical INL is ±1.0 LSB, and the typical DNL is ±0.4 LSB. - Can the CMOS output swing be adjusted?
Yes, the CMOS output swing can range from 0.5 V to 2.625 V using a separate output power supply. - What are some common applications of the LTC2242-12?
Common applications include wireless and wired broadband communication, cable head-end systems, power amplifier linearization, and communications test equipment.
