LTC2228CUH#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC2228CUH#TRPBF is a 12-bit, 65Msps low-power analog-to-digital converter (ADC) from Analog Devices. It operates on a single 3V supply (2.7V to 3.4V) with power dissipation of 205mW at full speed. Key AC performance metrics include a Signal-to-Noise Ratio (SNR) of 71.3dB and a Spurious Free Dynamic Range (SFDR) of 90dB at the Nyquist frequency. The device features a flexible differential input range of ±0.5V to ±1V, selectable via the SENSE pin. It includes an internal reference, clock duty cycle stabilizer, and pipeline latency of 5 cycles. The component is housed in a 32-lead, 5mm × 5mm QFN package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 65Msps sampling rate and 575MHz full power bandwidth
• Low power consumption: 205mW at 65Msps, 120mW at 40Msps, 75mW at 25Msps
• High dynamic performance: 71.3dB SNR and 90dB SFDR at Nyquist
• Integrated clock duty cycle stabilizer for high performance across varying duty cycles

Analog To Digital Converters (ADC) Applications

• Wireless and wired broadband communication systems
• Imaging systems requiring wide dynamic range signal digitization
• Ultrasound medical equipment
• Spectral analysis instruments
• Portable instrumentation devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific temperature grade suffix when ordering. The 'C' suffix denotes a commercial operating range of 0°C to 70°C, while the 'I' suffix indicates an industrial range of –40°C to 85°C. Ensure the '#TRPBF' suffix matches the required tape and reel packaging format. Confirm that the lead-free finish specification aligns with environmental compliance requirements for the target assembly process.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2228 for applications requiring up to 65Msps sampling rates. For lower speed requirements, consider the pin-compatible LTC2227 (40Msps) or LTC2226 (25Msps) to reduce power consumption. The input voltage range must be configured using the SENSE pin; connecting it to VDD selects a ±1V range, while VCM selects ±0.5V. Ensure the driving circuit can handle the sample-and-hold charging glitches, particularly at frequencies near Nyquist.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC222x family of 12-bit low-power ADCs. It shares pin compatibility with the LTC2227 and LTC2226 variants, which offer reduced sampling rates of 40Msps and 25Msps respectively. The family also includes 14-bit counterparts such as the LTC2248. All members utilize the same 32-lead QFN package and support similar supply voltages and interface protocols.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives within the same package include the LTC2227CUH#TRPBF (40Msps) and LTC2226CUH#TRPBF (25Msps). These parts offer lower power consumption but reduced maximum sampling speeds. Higher-speed options like the LTC2253 (125Msps) are available but may require different thermal management and power supply considerations.