AD7934BRU

Overview

The AD7934BRU is a 12-bit, high-speed, low-power successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates on a single 2.7 V to 5.25 V supply with throughput rates up to 1.5 MSPS. The device features four analog input channels with a sequencer and accepts single-ended, fully differential, or pseudo-differential inputs. It includes an accurate on-chip 2.5 V reference and a high-speed parallel interface supporting word/byte modes. Power dissipation is 6 mW max at 3 V and 13.5 mW max at 5 V. Operating temperature range is -40°C to +85°C in a 28-lead TSSOP package.

Feature Summary

• Four analog input channels with software-configurable sequencer for sequential conversion.
• Accurate on-chip 2.5 V voltage reference with ±0.2% maximum error at 25°C.
• Flexible power management including full shutdown mode with 2 μA maximum current draw.
• VDRIVE function allows parallel interface connection to 3 V or 5 V processors independent of VDD.

Applications

• Industrial process control systems requiring multi-channel data acquisition.
• Portable instrumentation utilizing single-supply operation.
• Battery-powered measurement devices benefiting from low power consumption.
• Data acquisition modules interfacing with microprocessors via parallel bus.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your region. Confirm that the operating voltage range aligns with your system design before procurement.

Selection Notes

Select the AD7934BRU when 12-bit resolution and 1.5 MSPS throughput are required. Consider this part for applications needing multiple analog inputs with channel sequencing. Verify compatibility with the host processor's parallel interface timing constraints and voltage levels.

Part Context

The AD7934BRU belongs to the AD7933/AD7934 family of SAR ADCs. It shares architectural similarities with the AD7933 but offers higher 12-bit resolution. Related devices include the AD7938 and AD7939, which provide eight channels. The AD7934-6 variant offers reduced throughput of 625 kSPS.

Replacement Considerations

The AD7933BRU serves as a 10-bit alternative within the same package. For eight-channel applications, consider the AD7938BRU. Verify pinout compatibility and register configuration differences when substituting these parts.