AD9218BSTZ-40

Overview

The AD9218BSTZ-40 is a dual-channel, 10-bit analog-to-digital converter manufactured by Analog Devices Inc. It operates at a maximum sampling rate of 40 MSPS with a single 3.0 V power supply (range: 2.7 V to 3.6 V). The device features an on-chip track-and-hold circuit and voltage reference, supporting differential or single-ended inputs with a 1 V p-p range. Digital outputs are TTL/CMOS compatible, offering selectable two's complement or offset binary formats. It utilizes a parallel interface within a 48-lead LQFP package.

Feature Summary

• Dual-channel architecture with independent channel operation
• Integrated track-and-hold and voltage reference components
• User-selectable data alignment and power-down modes
• TTL/CMOS compatible digital output interfaces

Applications

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

Procurement Notes

Verify the specific speed grade suffix (-40) against the required system sampling rate. Confirm that the 40 MSPS performance meets the Nyquist criteria for the target input frequencies. Ensure the 3.0 V supply voltage aligns with the design specifications. Check for RoHS compliance requirements before finalizing procurement orders.

Selection Notes

Select this component when a dual-channel solution with integrated references is required. Consider the 40 MSPS limit if higher throughput is needed. Evaluate the 1 V p-p input range against signal amplitudes. Verify compatibility with existing clocking infrastructure and logic levels. Assess thermal dissipation capabilities within the LQFP package constraints.

Part Context

This part belongs to the AD9218 family, which includes variants operating at 65, 80, and 105 MSPS. The -40 suffix denotes the 40 MSPS speed grade. The device is pin-compatible with the 8-bit AD9288, facilitating upgrades from lower resolution architectures without redesigning the PCB layout.

Replacement Considerations

Direct substitutes include other AD9218 speed grades (-65, -80, -105) if higher sampling rates are acceptable. The AD9288 serves as a downward-compatible alternative for 8-bit applications.