AD9020JZ

Overview

The AD9020JZ is a monolithic 10-bit analog-to-digital converter (ADC) capable of word rates up to 60 MSPS. It utilizes an innovative flash architecture with 512 input comparators to reduce input capacitance and improve linearity. The device features TTL-compatible encode and data outputs, supporting low-power system integration. It operates on dual ±5 V supplies with a bipolar analog input range nominally between ±1.75 V. Key dynamic performance metrics include a Signal-to-Noise Ratio (SNR) of 56 dB at a 2.3 MHz input frequency and an Effective Number of Bits (ENOB) of 9.0 bits under the same conditions. The component is housed in a 68-lead leaded ceramic package and functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Monolithic 10-bit resolution with 60 MSPS conversion rate using a modified parallel A/D architecture
• TTL-compatible digital outputs and encode command interface for direct logic integration
• Bipolar analog input capability with integrated reference ladder taps for optimized linearity
• Low input capacitance design achieved through reduced comparator count

Applications

• Digital Oscilloscopes
• Medical Imaging Systems
• Professional Video Digitization
• Radar Warning and Guidance Systems
• Infrared Imaging Sensors

Procurement Notes

Verify the specific suffix JZ corresponds to the 68-lead leaded ceramic package and the 0°C to 70°C operating temperature range as defined in the ordering guide. Confirm that the required voltage references (+VREF and –VREF) and quarter-point taps are supported by the external circuit design. Ensure compatibility with TTL/CMOS logic levels for the ENCODE signal and data outputs. Check for any end-of-life status or alternative military-grade variants if extended temperature ranges are required.

Selection Notes

Select the AD9020JZ when a high-speed, 10-bit resolution is required with TTL-compatible interfaces. This part is suitable for applications demanding low input capacitance and good dynamic performance at moderate frequencies. Consider the JE grade for standard commercial environments. Evaluate the need for external reference buffering to drive the quarter-point taps for optimal integral nonlinearity. Ensure the system can provide stable ±5 V power supplies and manage the thermal dissipation associated with the ceramic package.

Part Context

The AD9020 series represents Analog Devices' early high-performance flash ADC technology, designed for wideband receiver and digitizing oscilloscope applications. The JZ variant specifically denotes the commercial temperature grade housed in a 68-lead leaded ceramic chip carrier. This package option provides lower thermal impedance compared to surface-mount alternatives, facilitating heat dissipation in high-density layouts. The series supports various coding formats including Binary and Two's Complement via control pins.

Replacement Considerations

Public confirmed substitute part numbers: None identified.