AD9218BSTZ-RL105

Overview

The AD9218BSTZ-RL105 is a dual-channel, 10-bit monolithic sampling analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates at a maximum conversion rate of 105 MSPS with outstanding dynamic performance over its full operating range. Each channel features an on-chip track-and-hold circuit and requires only a single 3.0 V power supply (2.7 V to 3.6 V). The device provides low power consumption, dissipating 275 mW per channel at 105 MSPS. It includes an internal voltage reference and TTL/CMOS compatible digital outputs. The ADC supports user-selectable output coding formats, including two's complement and offset binary, and offers independent channel operation with configurable power-down modes.

Feature Summary

• Dual-channel architecture with independent operation capabilities
• On-chip track-and-hold circuits and integrated voltage reference
• Low power dissipation optimized for battery-powered applications
• TTL/CMOS compatible digital outputs with selectable data formats

Applications

• Battery-powered instruments
• Hand-held scopemeters
• Low cost digital oscilloscopes
• I and Q communications demodulators
• Ultrasound equipment

Procurement Notes

Verify the specific speed grade and package configuration when ordering. Ensure that the system clock meets the minimum pulse width requirements for the 105 MSPS grade. Confirm that the analog input signal levels remain within the specified differential range to maintain optimal linearity and avoid clipping during high-speed conversions.

Selection Notes

Select this component for designs requiring simultaneous dual-channel sampling with moderate resolution. Consider the 300 MHz analog bandwidth for direct intermediate frequency sampling applications. Evaluate the power budget carefully, as total consumption scales with the encode rate and load capacitance on the digital outputs.

Part Context

This part belongs to the AD9218 family of dual 10-bit ADCs, which also includes variants rated for 40 MSPS, 65 MSPS, and 80 MSPS. The BSTZ suffix indicates a lead-free, industrial temperature range device in a 48-lead LQFP package. It serves as a pin-compatible upgrade path from the older 8-bit AD9288 series, facilitating design transitions without PCB layout changes.

Replacement Considerations

The AD9218BSTZ-80 or AD9218BSTZ-65 may be used if lower sampling rates are acceptable. For single-channel applications, the AD9215 series offers similar performance characteristics in a smaller footprint.