AD7226TE/883B

Overview

The AD7226TE/883B is a high-precision, quad 8-bit Digital-to-Analog Converter (DAC) manufactured by Analog Devices Inc. under the LC2MOS process technology. This component is designed for military and aerospace applications, indicated by the /883B suffix denoting MIL-PRF-38535 compliance. It features four independent voltage-output channels with buffered outputs, utilizing an R-2R resistor ladder architecture. The device operates with dual power supplies, typically requiring positive voltages in the range of 11.4V to 16.5V and negative supplies around -5V. It supports parallel digital interfaces for data input and offers a settling time of approximately 4 microseconds. The package configuration is a 20-lead Ceramic Leadless Chip Carrier (LCCC), ensuring robust performance in demanding environments.

Feature Summary

• Quad-channel 8-bit resolution with buffered voltage outputs
• LC2MOS process technology for low power consumption
• Military-grade reliability compliant with MIL-PRF-38535 specifications
• Parallel digital interface for straightforward system integration

Applications

• Aerospace telemetry systems
• Military radar signal processing
• High-reliability industrial control systems
• Spacecraft instrumentation and data acquisition

Procurement Notes

Verify that the specific lot traceability documentation meets MIL-PRF-38535 requirements for your application. Confirm the ceramic LCCC package integrity and pinout compatibility with your PCB footprint. Ensure that the supply voltage ranges align with your system's power management design. Check for any specific screening levels or burn-in requirements mandated by your procurement contract. Validate that the component is sourced from authorized distributors to guarantee authenticity.

Selection Notes

Select this component when high reliability and radiation hardness are critical alongside moderate speed requirements. The quad-channel architecture reduces board space compared to single-channel alternatives. Consider the LCCC package for superior thermal dissipation and mechanical stability in harsh environments. Evaluate the parallel interface complexity against available microcontroller or FPGA resources. Compare power consumption metrics if battery life is a constraint in the target application.

Part Context

The AD7226 belongs to Analog Devices' family of LC2MOS DACs, which combine CMOS logic inputs with bipolar output stages. The /883B designation signifies that this variant has been screened and qualified according to the US Military Standard MIL-PRF-38535 for integrated circuits. This ensures enhanced quality control and testing beyond commercial grade parts. The series is known for its balance of speed, accuracy, and power efficiency in specialized electronic systems.

Replacement Considerations

Direct replacements must maintain MIL-PRF-38535 compliance and identical pinout. Verify that substitute components offer equivalent settling times and linearity specifications. Ensure the replacement package matches the 20-lead LCCC form factor. Cross-reference electrical characteristics to confirm compatibility with existing biasing networks.

FAQ

What does the /883B suffix indicate?

It indicates that the device complies with MIL-PRF-38535, a general specification for integrated circuits used in military and aerospace applications.

Is the output current capable of driving low impedance loads directly?

The outputs are buffered voltage outputs, designed to drive moderate loads. For very low impedance loads, external amplification may be required.

What is the typical settling time for full-scale transitions?

The typical settling time to 0.1% accuracy is approximately 4 microseconds.