Overview
The LTC2240-12, 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 sampling rate of 170 Msps, making it ideal for demanding communications applications. It features excellent AC performance, including a signal-to-noise ratio (SNR) of 65.6 dB and a spurious free dynamic range (SFDR) of 80 dB. The ultralow jitter of 95 fs RMS enables IF undersampling with excellent noise performance.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | 170 Msps |
| Signal-to-Noise Ratio (SNR) | 65.6 dB |
| Spurious Free Dynamic Range (SFDR) | 80 dB |
| Full Power Bandwidth S/H | 1.2 GHz |
| Supply Voltage | Single 2.5V |
| Power Dissipation | 445 mW |
| Output Formats | LVDS, CMOS, or Demultiplexed CMOS |
| Input Ranges | ±0.5V or ±1V |
| Integral Nonlinearity (INL) | ±0.6 LSB (typ) |
| Differential Nonlinearity (DNL) | ±0.4 LSB (typ) |
| Package | 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP) |
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.
- Separate output power supply allows CMOS output swing to range from 0.5V to 2.625V.
- ENC+ and ENC– inputs can be driven differentially or single-ended with various input types (sine wave, PECL, LVDS, TTL, or CMOS).
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 LTC2240-12 ADC?
The LTC2240-12 ADC has a sampling rate of 170 Msps. - What is the signal-to-noise ratio (SNR) of the LTC2240-12?
The SNR of the LTC2240-12 is 65.6 dB. - What are the available output formats for the LTC2240-12?
The LTC2240-12 offers LVDS, CMOS, or demultiplexed CMOS output formats. - What are the selectable input ranges for the LTC2240-12?
The selectable input ranges are ±0.5V or ±1V. - Does the LTC2240-12 have any power-saving modes?
Yes, it has shutdown and nap modes for power management. - What is the package type of the LTC2240-12?
The LTC2240-12 is packaged in a 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP). - Can the ENC+ and ENC– inputs be driven differentially or single-ended?
Yes, the ENC+ and ENC– inputs can be driven differentially or single-ended with various input types. - What is the typical integral nonlinearity (INL) of the LTC2240-12?
The typical INL is ±0.6 LSB. - Does the LTC2240-12 have an optional clock duty cycle stabilizer?
Yes, it does have an optional clock duty cycle stabilizer. - What are some common applications of the LTC2240-12?
Common applications include wireless and wired broadband communication, cable head-end systems, power amplifier linearization, and communications test equipment.
