AD9218BSTZ-RL40

Overview

The AD9218BSTZ-RL40 is a dual-channel, 10-bit monolithic sampling analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum conversion rate of 40 MSPS with outstanding dynamic performance over its full operating range. The device features on-chip track-and-hold circuits and an internal voltage reference, requiring only a single 3.0 V supply for operation. Each channel provides a 300 MHz analog bandwidth and supports user-selectable 1 V p-p or 2 V p-p differential input ranges. Digital outputs are TTL/CMOS compatible, supporting offset binary or two's complement formats. The component is housed in a 48-lead LQFP package and is specified for the industrial temperature range.

Feature Summary

• Dual-channel architecture with independent operation capabilities
• Integrated track-and-hold circuitry and internal voltage reference
• Configurable digital output coding and data alignment modes
• Single-supply operation with low power consumption

Applications

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

Procurement Notes

Verify that the ordering suffix RL40 corresponds to the 40 MSPS speed grade as defined in the official Analog Devices Ordering Guide. Confirm the package type matches the 48-lead LQFP specification. Ensure the procurement source provides documentation verifying the component meets the industrial temperature range requirements. Cross-reference the specific part number against the manufacturer's current datasheet revision to confirm functional compatibility.

Selection Notes

Select this model when a 40 MSPS sampling rate is sufficient for the application, offering potential power savings compared to higher-speed grades. Consider the pin-compatible upgrade path from the 8-bit AD9288 if migrating existing designs. Evaluate the need for the internal reference versus external precision references based on system accuracy requirements. Verify that the TTL/CMOS logic levels align with the downstream processing interface constraints.

Part Context

The AD9218 series includes multiple speed grades: 40, 65, 80, and 105 MSPS. The BSTZ-RL40 variant specifically denotes the 40 MSPS performance tier within the dual 10-bit family. This series is designed for applications requiring high dynamic performance with low power dissipation. The component shares a common footprint with other grades, facilitating design flexibility across different bandwidth requirements.

Replacement Considerations

The AD9218BSTZ-RL40 is pin-compatible with the AD9288, allowing for direct upgrades from 8-bit to 10-bit resolution without PCB redesign. Other speed grades within the AD9218 family (e.g., -65, -80, -105) share the same package and pinout but offer higher sampling rates.