LTC2140CUP-12#PBF

Analog To Digital Converters (ADC) Overview

The LTC2140CUP-12#PBF is a dual-channel, simultaneously sampling 12-bit analog-to-digital converter (ADC) from Analog Devices. Operating at a maximum sampling rate of 25Msps, it features a 750MHz full-power bandwidth sample-and-hold circuit and an internal voltage reference. The device delivers a typical signal-to-noise ratio (SNR) of 71dB and a spurious-free dynamic range (SFDR) of 89dB with ultralow jitter of 0.08ps RMS. It operates on a single 1.8V supply, consuming 48mW total power (24mW per channel). Digital outputs support full-rate CMOS, double data rate (DDR) CMOS, or DDR LVDS modes, with selectable input ranges from 1VP-P to 2VP-P.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel simultaneous sampling with 12-bit resolution and 25Msps throughput
• High AC performance: 71dB SNR, 89dB SFDR, and 0.08ps RMS jitter
• Low power consumption: 48mW total (24mW per channel) at 25Msps
• Flexible digital interfaces including full-rate CMOS, DDR CMOS, and DDR LVDS

Analog To Digital Converters (ADC) Applications

• Communications systems
• Cellular base stations
• Software-defined radios
• Portable medical imaging
• Multi-channel data acquisition
• Nondestructive testing

Analog To Digital Converters (ADC) Procurement Notes

Verify the operating temperature range matches the application requirements. The 'C' suffix in LTC2140CUP-12 indicates a commercial grade range of 0°C to 70°C. For industrial temperatures (-40°C to 85°C), select the 'I' variant (LTC2140IUP-12#PBF). Confirm package integrity for the 64-lead QFN form factor before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this component when low power and high dynamic range are critical for dual-channel applications. The LTC2140-12 offers the lowest power among the family variants (LTC2142/41/40) at 25Msps. Ensure the system clock duty cycle stabilizer is utilized if clock quality varies, and configure the serial SPI port for optimal output mode and input range settings.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2142-12/LTC2141-12/LTC2140-12 family of low-power dual ADCs. While functionally similar, the LTC2140-12 is optimized for lower sampling rates (25Msps) compared to the LTC2141-12 (40Msps) and LTC2142-12 (65Msps). All variants share the same 64-pin QFN package and pinout, allowing for potential design flexibility across different speed requirements.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2140IUP-12#PBF serves as the industrial temperature grade equivalent. Other family members like LTC2141CUP-12#PBF or LTC2142CUP-12#PBF offer higher sampling speeds but consume more power. Direct pin-compatible substitutes within the same family require verification of thermal and timing specifications.