AD9243ASZ

Overview

The AD9243ASZ is a monolithic 14-bit, 3 MSPS analog-to-digital converter manufactured by Analog Devices Inc. It operates on a single +5 V supply with typical power consumption of 110 mW and maximum dissipation of 145 mW. The device features a four-stage differential pipelined architecture with digital error correction to guarantee no missing codes. Key performance metrics include an Integral Nonlinearity (INL) of ±2.5 LSB, Differential Nonlinearity (DNL) of ±0.6 LSB typ/±1.0 LSB max, and an input referred noise of 0.36 LSB rms at 2.5 V reference. Signal-to-Noise Ratio (SNR) reaches 80 dB typ at 500 kHz input frequency, while Spurious-Free Dynamic Range (SFDR) is 91 dB typ. The component is housed in a 44-lead MQFP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates a high-performance sample-and-hold amplifier and programmable voltage reference on a single chip.
• Supports flexible analog input configurations for both single-ended and differential signal interfaces.
• Provides straight binary output data compatible with +3 V and +5 V CMOS logic families.
• Includes an out-of-range indicator signal to detect overflow conditions.

Applications

• Direct-IF down conversion in communication systems
• Imaging and medical instrumentation
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix 'S' corresponds to the Metric Quad Flatpack package option as defined in the manufacturer's ordering guide. Confirm that the component meets RoHS3 compliance requirements for the intended market. Check current lifecycle status, as availability may be limited or subject to discontinuation notices. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS process.

Selection Notes

Select this component when a low-power, single-supply solution is required for 14-bit resolution applications up to 3 MSPS. Consider the internal reference options if external precision references are undesirable. Evaluate the thermal resistance characteristics for PCB layout planning. Verify that the parallel interface latency of three clock cycles aligns with system timing constraints.

Part Context

The AD9243ASZ belongs to the AD924x series of monolithic ADCs, which also includes the AD9240 and AD9241 models. These devices share pin compatibility and architectural similarities but differ in sampling rates, with the AD9243 positioned between the 10 MSPS AD9240 and the 1.25 MSPS AD9241. This series was designed to replace hybrid implementations, offering reduced cost and board space while maintaining high dynamic performance.

Replacement Considerations

The AD9240AS and AD9241AS are pin-compatible members of the same family. Substitution requires verification of sampling rate differences, as the AD9240 operates at 10 MSPS and the AD9241 at 1.25 MSPS. Performance parameters such as SNR and power consumption will vary significantly between these models.