AD9051BRS

Overview

The AD9051BRS is a 10-bit, 60 MSPS monolithic sampling analog-to-digital converter (ADC) fabricated on a BiCMOS process. It features an onboard track-and-hold circuit and a 2.5 V voltage reference. The device operates from a single 5 V supply with digital I/O compatible with 3 V or 5 V logic levels. It utilizes a two-step subranging architecture to achieve high dynamic performance while maintaining low power consumption of approximately 250 mW at maximum speed. The input bandwidth is selectable between 50 MHz and 130 MHz via the BWSEL pin. The component is housed in a 28-lead SSOP package and is specified for operation within the industrial temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated onboard track-and-hold and voltage reference circuits eliminate external component requirements.
• Selectable input bandwidth allows optimization for either 50 MHz or 130 MHz nominal frequencies.
• Dual-voltage logic compatibility supports direct interfacing with both 3 V and 5 V digital systems.
• Subranging architecture with digital error correction ensures true 10-bit accuracy.

Applications

• Medical imaging systems
• Digital communications infrastructure
• Professional video equipment
• General instrumentation
• Set-top box implementations

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm RoHS compliance status and reel versus tube packaging options. Ensure the selected variant matches the required operating temperature range and logic voltage interface specifications for the target design environment.

Selection Notes

Select the standard BRS variant for general applications using the internal 2.5 V reference. Choose the -2V suffix version if precise gain control or matching across multiple devices is required by utilizing an external reference voltage. Consider the RL suffix only if reel packaging is explicitly required for automated assembly processes.

Part Context

The AD9051 belongs to Analog Devices' family of low-cost, high-performance data converters designed for space-constrained applications. It serves as a cost-effective solution for systems requiring moderate resolution and high sampling rates without the complexity of multi-chip ADC solutions.

Replacement Considerations

The AD9051BRSZ is the RoHS-compliant equivalent of the AD9051BRS. Both share identical electrical characteristics and pinouts; the distinction lies solely in manufacturing compliance standards rather than functional differences.

FAQ

How is the input bandwidth configured?

The bandwidth is set via the BWSEL pin. Leaving it unconnected (NC) enables the 130 MHz nominal bandwidth, while connecting it to VD enables the 50 MHz nominal bandwidth.

What is the effect of overdriving the analog input?

If the input exceeds the nominal range, comparators detect the condition and clamp the input buffer. The digital outputs lock to their maximum or minimum values to prevent invalid data codes.

Can the device interface directly with 3 V logic?

Yes. By connecting the isolated digital output supply pins (VDD) to a 3 V source, the outputs provide 3 V logic levels, allowing direct connection to 3 V systems without translation.