ADC14DS105AISQE/NOPB

Analog To Digital Converters (ADC) Overview

The ADC14DS105AISQ/NOPB is a dual-channel, 14-bit analog-to-digital converter from Texas Instruments. It operates at sampling rates up to 105 MSPS with a typical full power bandwidth of 1 GHz. The device utilizes a pipelined architecture with digital error correction and serializes outputs via differential LVDS pairs. It supports single +3.0V or 3.3V supply operation and includes an internal 1.2V reference. Key dynamic specifications include a typical SNR of 70.5 dBFS and SFDR of 83 dBFS at 240 MHz input frequency. The component is housed in a 60-lead WQFN package (9x9x0.8mm) and functions within an industrial temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel 14-bit resolution with 105 MSPS conversion rate
• Serial LVDS outputs for high-speed data transmission
• Integrated clock duty cycle stabilizer and SPI control interface
• Single +3.0V or 3.3V supply operation with low power consumption

Analog To Digital Converters (ADC) Applications

• High IF sampling receivers
• Wireless base station receivers
• Test and measurement equipment
• Communications instrumentation
• Portable instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific AISQ suffix against the official datasheet to confirm the higher SFDR performance tier compared to the CISQ variant. Ensure that the 60-pin WQFN footprint matches the PCB layout requirements, specifically noting the 0.5mm pin pitch. Confirm that the design accommodates the separate analog (VA) and digital driver (VDR) power supplies as specified in the operating ratings.

Analog To Digital Converters (ADC) Selection Notes

Select this model when dual-channel serialization via LVDS is required to reduce trace count in high-density designs. The AISQ grade is appropriate for applications demanding superior spurious-free dynamic range (83 dBFS vs 80 dBFS). Designers must account for the 100-ohm termination resistors required for all LVDS output pairs and ensure the input common mode voltage remains between 1.4V and 1.6V.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADC14DS105 family, which features pin-compatible variants including the ADC14DS105CISQ. The primary distinction lies in the dynamic performance metrics, where the AISQ version offers enhanced SFDR. The series is designed for mid-frequency sampling applications, allowing systems to bypass down-conversion stages while maintaining low noise and high linearity.

Analog To Digital Converters (ADC) Replacement Considerations

The ADC14DS105CISQ/NOPB is a direct pin-compatible alternative within the same family. Selection should be based on whether the lower SFDR specification of the CISQ variant meets the system's dynamic range requirements, potentially offering cost advantages if the AISQ performance margin is unnecessary.

Analog To Digital Converters (ADC) FAQ

What is the maximum clock frequency in single-lane mode?

In single-lane mode, the maximum clock frequency is limited to 65 MHz.

How does the OF/DCS pin affect the output data format?

The OF/DCS pin selects between offset binary and 2's complement formats and determines whether the clock duty cycle stabilizer is enabled. For example, connecting it to VA enables 2's complement without stabilization, while connecting it to (2/3)*VA enables 2's complement with stabilization.

What is the conversion latency in dual-lane word-aligned mode?

The conversion latency is 9 clock cycles in dual-lane word-aligned mode.