LTC2274CUJ

Analog To Digital Converters (ADC) Overview

The LTC2274CUJ is a 16-bit, 105Msps analog-to-digital converter featuring a high-speed serial interface compliant with the JESD204 specification. It provides a 700MHz full-power bandwidth and supports differential or single-ended encode clock inputs. The device includes a programmable gain amplifier (PGA) front end allowing for 2.25Vp-p or 1.5Vp-p input ranges. Key performance metrics include a 77.7dBFS noise floor, 100dB spurious-free dynamic range (SFDR), and 80fs RMS internal jitter. It operates on a single 3.3V supply with 1300mW power dissipation and is housed in a 40-lead 6mm × 6mm QFN package.

Analog To Digital Converters (ADC) Feature Summary

• 105Msps sampling rate with 16-bit resolution
• JESD204 high-speed serial output interface
• 700MHz full power bandwidth sample-and-hold circuit
• Programmable Gain Amplifier (PGA) with selectable input ranges
• Integrated clock duty cycle stabilizer

Analog To Digital Converters (ADC) Applications

• Telecommunications receivers
• Cellular base stations
• Spectrum analysis equipment
• Imaging systems
• Automatic test equipment (ATE)

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'CUJ' indicates the commercial temperature grade (0°C to 70°C). Confirm lead-free finish requirements if RoHS compliance is mandatory for the target assembly process. Ensure the ordering part number matches the required tape and reel or tube packaging configuration.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2274CUJ when a 105Msps sampling rate is required. For lower speed needs within the same pin-compatible family, consider the LTC2273 (80Msps) or LTC2272 (65Msps). Verify that the system can support the JESD204 serial interface protocol and that the 3.3V single-supply architecture fits the power budget constraints.

Analog To Digital Converters (ADC) Part Context

The LTC2274 belongs to a family of high-performance serial output ADCs from Analog Devices. It shares pin compatibility with the LTC2273 and LTC2272, which offer reduced sampling rates. The CUJ suffix specifically denotes the commercial operating temperature range variant within this product line.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2273CUJ and LTC2272CUJ are pin-compatible alternatives offering 80Msps and 65Msps sampling rates respectively. These may be used if the system design allows for lower throughput while maintaining the same interface and package footprint.

Analog To Digital Converters (ADC) FAQ

What is the function of the SENSE pin?

The SENSE pin selects between the internal 2.5V bandgap reference (when tied to VDD) or an external reference input. Both internal and external references set a full-scale ADC range of 2.25V when PGA=0.

How does the DITH pin affect performance?

The DITH pin enables or disables the internal dither generator. Enabling dither improves the Spurious Free Dynamic Range (SFDR) at low signal levels by reducing harmonic distortion artifacts.

What is the pipeline latency of the LTC2274?

The device has a fixed pipeline latency of 9 cycles relative to the encode clock.