LTC2229CUH#PBF

Analog To Digital Converters (ADC) Overview

The LTC2229CUH#PBF is a 12-bit, 80Msps analog-to-digital converter (ADC) designed for low power operation on a single 3V supply. It features a pipelined architecture with a 575MHz full-power bandwidth sample-and-hold circuit and an integrated clock duty cycle stabilizer. The device delivers 70.6dB SNR and 90dB SFDR at a 70MHz input frequency. It supports flexible differential or single-ended inputs with selectable voltage ranges of ±0.5V to ±1V via the SENSE pin. Power consumption is typically 211mW, with dedicated shutdown and nap modes reducing dissipation to 2mW and 15mW respectively. The component is housed in a 32-lead, 5mm × 5mm QFN package.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution: Provides no missing codes over temperature with typical INL of ±0.4LSB and DNL of ±0.2LSB.
• High Speed Sampling: Operates at up to 80Msps with a 575MHz full-power bandwidth sample-and-hold circuit.
• Low Power Consumption: Draws 211mW at full speed on a single 3V supply; includes shutdown (2mW) and nap (15mW) modes.
• Flexible Input Configuration: Supports differential or single-ended inputs with programmable ranges from ±0.5V to ±1V.

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free compliance. Confirm the temperature grade 'C' corresponds to the 0°C to 70°C operating range. Ensure the QFN-32 package dimensions match the PCB footprint requirements. Check for availability of recommended development kits such as DC750A-J or DC750A-K for evaluation purposes.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2229 when 12-bit resolution and 80Msps sampling rate are required within a low power budget. Choose this part over higher-speed variants like the LTC2253 if system power constraints are critical. Consider the LTC2249 if 14-bit resolution is necessary instead of 12-bit. Ensure the application can accommodate the 32-pin QFN package size and thermal requirements.

Analog To Digital Converters (ADC) Part Context

The LTC2229 belongs to the LTC22xx family of low power 3V ADCs. It is pin-compatible with other members of the series, including the LTC2228 (65Msps), LTC2227 (40Msps), and LTC2226 (25Msps). Higher performance variants in the same package include the LTC2253 (125Msps) and LTC2255 (14-bit). This compatibility allows for design flexibility across different speed and resolution requirements without changing the board layout.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC2228, LTC2227, and LTC2226 for lower speeds. For higher performance, the LTC2253 and LTC2255 are compatible. Verify that the alternative part's power consumption and input range specifications meet the original design requirements.