AD9059BRSZ-REEL

Overview

The AD9059BRSZ-REEL is a dual-channel, 8-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates at a maximum sampling rate of 60 MSPS with a typical full-power analog bandwidth of 120 MHz. The device integrates an internal 2.5 V voltage reference and dual track-and-hold circuits, requiring only a single 5 V analog supply and a 3 V to 5 V digital supply. It features parallel 8-bit outputs compatible with both 3 V and 5 V logic families. Key electrical specifications include a typical power dissipation of 400 mW, which reduces to less than 12 mW in power-down mode. The component is housed in a 28-lead shrink small outline package (SSOP) and is specified for operation within the industrial temperature range of –40°C to +85°C.

Feature Summary

• Dual monolithic ADC channels with simultaneous sampling capability controlled by a single encode clock input.
• Integrated on-chip 2.5 V bandgap voltage reference and high-speed track-and-hold circuits for each channel.
• Flexible digital interface supporting direct connection to either 3 V or 5 V CMOS/TTL logic systems.
• Low power consumption design with a dedicated power-down function that minimizes energy usage during idle periods.

Applications

• Digital communications systems, specifically QAM demodulators.
• RGB and YC/Composite video processing and digitization.
• Digital data storage read channels.
• Medical imaging equipment.
• Direct IF sampling in cable, satellite, or wireless LAN modem receivers.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm packaging type and reel specifications. Ensure the procurement source provides valid traceability and authenticity guarantees for Analog Devices components. Confirm that the delivered units match the RS-28 package dimensions and industrial temperature rating defined in the official datasheet.

Selection Notes

Select this component when a system requires two synchronized 8-bit ADCs with high analog bandwidth. Consider the AD9057 if only a single channel is needed, as it shares the same core architecture but utilizes a smaller 20-lead package. Evaluate the power supply requirements carefully, noting the separation between the 5 V analog supply and the 3 V to 5 V digital supply options.

Part Context

The AD9059 belongs to a family of low-cost, low-power monolithic ADCs from Analog Devices. It is designed to replace discrete solutions by integrating references and drivers on a single chip. The device serves as a cost-effective alternative to higher-resolution converters in applications where 8-bit accuracy is sufficient for signal integrity.

Replacement Considerations

The AD9057 is the single-channel equivalent based on the same ADC core. Verify pin compatibility and package differences (20-lead vs. 28-lead SSOP) when substituting. No other direct cross-model replacements are documented in the provided datasheet.

FAQ

Can the AD9059 operate in a ping-pong mode?

No, the AD9059 cannot be operated in a 2-channel ping-pong mode due to its linked ENCODE architecture, which controls both channels simultaneously.

What is the minimum power-up time required after exiting power-down mode?

A 200 ns power-up period should be provided to ensure accurate ADC output data. Valid output data becomes available three clock cycles after this delay.

How does the internal voltage reference affect gain and offset?

The internal reference sets the ADC gain and offset. An external reference can overdrive the internal one to adjust gain by up to ±10%, where a 2% change in reference voltage results in a corresponding 2% change in ADC gain and a 50 mV change in offset.