Overview
The LTC2242-12 is a high-performance, 250Msps, 12-bit analog-to-digital converter (ADC) designed by Analog Devices Inc. for digitizing high-frequency, wide dynamic range signals. This ADC is particularly suited for demanding communications applications, offering excellent AC performance with a signal-to-noise ratio (SNR) of 65.4dB and a spurious free dynamic range (SFDR) of 78dB. The ultralow jitter of 95fs RMS enables IF undersampling with outstanding noise performance, making it ideal for applications requiring high precision and reliability.
Key Specifications
| Parameter | Value |
|---|---|
| Sample Rate | 250Msps |
| Resolution | 12-bit |
| SNR | 65.4dB |
| SFDR | 78dB |
| Full Power Bandwidth S/H | 1.2GHz |
| Supply Voltage | Single 2.5V |
| Power Dissipation | 740mW |
| Output Formats | LVDS, CMOS, or Demultiplexed CMOS |
| Input Ranges | ±0.5V or ±1V |
| Integral Nonlinearity (INL) | ±1.0LSB (typ) |
| Differential Nonlinearity (DNL) | ±0.4LSB (typ) |
| Package | 64-Pin 9mm × 9mm QFN |
Key Features
- No missing codes over temperature.
- Optional clock duty cycle stabilizer for high performance over a wide range of clock duty cycles.
- Shutdown and nap modes for power management.
- Data ready output clock.
- Pin compatible family with other LTC224x models.
- Three format options for CMOS outputs: single bus at full data rate or two demultiplexed buses at half data rate with either interleaved or simultaneous update.
- Separate output power supply allowing CMOS output swing to range from 0.5V to 2.625V.
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 250Msps. - What is the resolution of the LTC2242-12 ADC?
The resolution of the LTC2242-12 ADC is 12 bits. - What are the output formats available for the LTC2242-12?
The output formats available are LVDS, CMOS, or demultiplexed CMOS. - What are the input ranges for the LTC2242-12?
The input ranges are ±0.5V or ±1V. - Does the LTC2242-12 have any power-saving modes?
Yes, it has shutdown and nap modes for power management. - What is the typical power dissipation of the LTC2242-12?
The typical power dissipation is 740mW. - What is the package type of the LTC2242-12?
The package type is a 64-Pin 9mm × 9mm QFN. - 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. - Does the LTC2242-12 support clock duty cycle stabilization?
Yes, it has an optional clock duty cycle stabilizer. - What is the jitter performance of the LTC2242-12?
The LTC2242-12 has an ultralow jitter of 95fs RMS.
