AD9218BSTZ-80

Overview

The AD9218BSTZ-80 is a dual-channel, 10-bit monolithic sampling analog-to-digital converter manufactured by Analog Devices. It supports a maximum sampling rate of 80 MSPS and operates on a single 3.0 V supply (range 2.7 V to 3.6 V). Each channel features an on-chip track-and-hold circuit with a full-power analog bandwidth of 300 MHz. The device offers user-selectable differential input ranges of 1 Vp-p or 2 Vp-p and includes an internal voltage reference. Digital outputs are TTL/CMOS compatible, supporting offset binary or two's complement coding formats. It is housed in a 48-lead LQFP package rated for industrial temperatures from -40°C to +85°C.

Feature Summary

• Dual-channel architecture with independent operation and low inter-channel crosstalk
• Integrated track-and-hold circuits and internal voltage reference
• Configurable digital output formats including offset binary and two's complement
• Pin-compatible upgrade path from 8-bit devices

Applications

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

Procurement Notes

Verify the specific speed grade suffix matches the required sampling rate before ordering. Confirm that the application environment remains within the specified industrial temperature range. Ensure power supply decoupling meets datasheet recommendations to maintain dynamic performance. Check for any recent revision updates to the datasheet regarding timing parameters.

Selection Notes

Select this model when a fixed 80 MSPS sampling rate is sufficient for the signal bandwidth. Consider the 105 MSPS variant if higher Nyquist frequencies must be sampled directly. Evaluate the 40 MSPS or 65 MSPS grades if lower power consumption is prioritized over maximum throughput. Verify compatibility with existing logic levels for the TTL/CMOS outputs.

Part Context

This component belongs to the AD9218 family of dual 10-bit ADCs. It shares the same physical footprint and pinout as the AD9288, facilitating direct upgrades from 8-bit architectures. The BSTZ-80 designation specifically identifies the 80 MSPS speed bin within the broader product line.

Replacement Considerations

The AD9218BSTZ-40, AD9218BSTZ-65, and AD9218BSTZ-105 are pin-compatible alternatives offering different maximum sampling rates. The AD9288 serves as a legacy 8-bit predecessor with identical packaging.