Overview
The LTC2241-12, 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. With a sampling rate of 210 Msps, this ADC is ideal for demanding communications applications. It features excellent AC performance, including a signal-to-noise ratio (SNR) of 65.5 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 operates on a single 2.5V supply and has low power dissipation of 585 mW, making it efficient for various high-speed applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12 bits | |
| Sample Rate | 210 Msps | |
| SNR | 65.5 dB | |
| SFDR | 78 dB | |
| Full Power Bandwidth S/H | 1.2 GHz | |
| Supply Voltage | 2.5 V | |
| Power Dissipation | 585 mW | |
| Output Modes | LVDS, CMOS, or Demultiplexed CMOS | |
| Input Ranges | ±0.5 V or ±1 V | |
| Integral Linearity Error (INL) | ±0.7 LSB (typ) | |
| Differential Linearity Error (DNL) | ±0.4 LSB (typ) | |
| Package | 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP) | |
| Operating Temperature Range | –40°C to 85°C |
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 over a wide range of clock duty cycles.
- Shutdown and nap modes for power management.
- Data ready output clock.
- Pin compatible with other family members (e.g., LTC2242-12, LTC2240-12).
- 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 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 sampling rate of the LTC2241-12 ADC?
The sampling rate of the LTC2241-12 ADC is 210 Msps.
- What are the available output modes for the LTC2241-12?
The LTC2241-12 offers LVDS, CMOS, or demultiplexed CMOS output modes.
- What is the typical power dissipation of the LTC2241-12?
The typical power dissipation is 585 mW.
- What are the selectable input ranges for the LTC2241-12?
The selectable input ranges are ±0.5 V or ±1 V.
- Does the LTC2241-12 have any power management features?
Yes, it includes shutdown and nap modes for power management.
- What is the significance of the ultralow jitter in the LTC2241-12?
The ultralow jitter of 95 fs RMS allows for excellent noise performance in IF undersampling.
- Can the CMOS output swing be adjusted?
Yes, the CMOS output swing can range from 0.5V to 2.625V using a separate output power supply.
- What types of input signals can be driven to the ENC+ and ENC– inputs?
The ENC+ and ENC– inputs can be driven differentially or single-ended with sine wave, PECL, LVDS, TTL, or CMOS inputs.
- Is there an optional feature for clock duty cycle stabilization?
Yes, an optional clock duty cycle stabilizer is available for high performance over a wide range of clock duty cycles.
- What is the package type and size of the LTC2241-12?
The LTC2241-12 comes in a 64-Lead QFN package with dimensions of 9mm x 9mm x 0.75mm w/ EP.
