AD9002AD

Overview

The AD9002AD is an 8-bit monolithic analog-to-digital converter fabricated in an advanced bipolar process. It supports a maximum conversion rate of 150 MSPS and operates on a single –5.2 V supply with a nominal power dissipation of 750 mW. The device features a large signal analog input bandwidth of 160 MHz and low input capacitance of 17 pF. It utilizes ECL-compatible parallel outputs and includes an overflow bit for overvoltage indication. The AD9002AD provides 0.75 LSB linearity and functions within an industrial temperature range of –25 °C to +85 °C.

Feature Summary

• High-speed flash architecture utilizing 256 parallel comparator stages for rapid data acquisition without external track-and-hold circuits.
• ECL-compatible digital output interface with dedicated overflow inhibit control for flexible logic integration.
• Adjustable hysteresis control pin to optimize comparator sensitivity and improve noise immunity in harsh environments.

Applications

• Radar Systems
• Digital Oscilloscopes and ATE Equipment
• Laser/Radar Warning Receivers
• Electronic Warfare (ECM, ECCM, ESM)

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. The AD9002AD designation corresponds to the ceramic DIP package variant. Ensure that the procurement specifications align with the required linearity tolerance and operating temperature range defined in the official datasheet.

Selection Notes

Select the AD9002AD when a 0.75 LSB linearity specification is sufficient for the application requirements. This model is suitable for industrial environments operating between –25 °C and +85 °C. Consider alternative grades if tighter differential or integral linearity metrics are necessary for high-fidelity signal processing tasks.

Part Context

The AD9002 series represents a family of high-speed 8-bit flash ADCs from Analog Devices. The AD9002AD specifically denotes the industrial grade version housed in a 28-lead side-brazed ceramic dual in-line package. It shares functional similarities with other members like the AD9002BD but differs in linearity accuracy and thermal performance specifications.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.

FAQ

How does the AD9002 handle overvoltage inputs?

The device incorporates an overflow bit that indicates overrange inputs. The OVERFLOW INH pin allows users to enable or inhibit this feature, determining whether the output returns to zero or remains high during overvoltage conditions.

What is the purpose of the HYSTERESIS pin?

The HYSTERESIS control pin allows adjustment of the comparator hysteresis from 0 mV to 10 mV. This feature helps optimize comparator sensitivity and improves overall performance and noise immunity in demanding applications.

Can the AD9002 operate without an external track-and-hold amplifier?

Yes, the AD9002 features an exceptionally wide analog input bandwidth of 160 MHz and low input capacitance, allowing it to accurately acquire high-speed pulse inputs directly without requiring an external track-and-hold circuit.