AD7339BS

ADCs/DACs - Special Purpose Overview

The AD7339BS is an obsolete composite integrated circuit from Analog Devices, featuring a single 8-bit analog-to-digital converter (ADC) and four digital-to-analog converters (DACs). It operates on a single +5 V supply with an internal 2.5 V bandgap reference. The ADC provides a conversion rate of 2.048 MSPS with a signal-to-noise ratio of 42.7 dB minimum. The device includes two 8-bit parallel DACs with an update rate up to 2.304 MHz and two 8-bit serial DACs. It is housed in a 52-lead Plastic Quad Flatpack (PQFP) package and supports industrial temperature ranges from -40°C to +85°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-bit ADC with 2.048 MSPS throughput and ±1 LSB integral nonlinearity
• Two 8-bit parallel DACs with simultaneous update capability at 2.304 MHz
• Two 8-bit serial DACs with configurable gain via feedback pins
• On-chip 2.5 V bandgap reference with individual power-down control for each section

ADCs/DACs - Special Purpose Applications

• Composite data acquisition systems requiring simultaneous conversion and generation
• Industrial control loops utilizing integrated signal conditioning
• Systems requiring isolated analog output generation alongside high-speed sampling

ADCs/DACs - Special Purpose Procurement Notes

The AD7339BS is designated as obsolete by the manufacturer. Verification of availability requires checking authorized distributors for remaining stock or end-of-life inventory. Component authenticity and storage conditions must be confirmed due to the discontinued status. Soldering parameters should adhere to the specified vapor phase or infrared limits provided in the datasheet.

ADCs/DACs - Special Purpose Selection Notes

Select this component only if legacy compatibility with the 52-lead PQFP form factor is required. The device offers a unique combination of mixed-signal functions in a single package, eliminating the need for separate ADC and DAC chips. Designers must account for the specific offset binary coding and bias requirements of the ADC input, which centers around 1.4 V.

ADCs/DACs - Special Purpose Part Context

The AD7339 belongs to a family of composite mixed-signal devices produced by Analog Devices in the late 1990s. The 'B' suffix indicates the industrial temperature grade (-40°C to +85°C), while the 'S' denotes the Plastic Quad Flatpack (PQFP) package option. This part integrates multiple functional blocks typically found in separate components, targeting cost-sensitive embedded applications.

ADCs/DACs - Special Purpose Replacement Considerations

As the AD7339 is obsolete, no direct official replacement is listed in the provided documentation. Engineers must evaluate modern mixed-signal microcontrollers or discrete ADC/DAC combinations that match the 8-bit resolution and speed requirements. Pin-compatible alternatives are not available; redesign of the PCB layout and software drivers will be necessary.