AD1583WBRTZ-R7

Voltage Reference Overview

The AD1583WBRTZ-R7 is a micropower, precision series mode voltage reference manufactured by Analog Devices Inc. It provides a nominal output voltage of 3 V with an initial accuracy of 1.0% (Grade A) and a temperature coefficient of 100 ppm/°C. The device operates within a supply range from VOUT + 200 mV to 12 V, drawing a maximum quiescent current of 70 µA. It supports a load current capability of ±5 mA and features wideband noise of 60 µV rms in the 10 Hz to 10 kHz band. The component is specified for operation between −40°C and +125°C and is housed in a compact SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Series mode architecture eliminates input series resistor waste, maximizing power efficiency across varying supply voltages.
• Patented temperature drift curvature correction design minimizes nonlinearities in the voltage output temperature characteristic.
• Low dropout operation requires only 200 mV headroom above the output voltage.
• Qualified for automotive applications.

Voltage Reference Applications

• Portable, battery-powered equipment such as notebook computers, cellular phones, pagers, PDAs, GPSs, and DMMs
• Computer workstations suitable for use with video RAMDACs
• Smart industrial transmitters
• PCMCIA cards
• Automotive systems

Voltage Reference Procurement Notes

Verify that the specific ordering suffix WBRTZ-R7 corresponds to the intended electrical grade, packaging format, and reel quantity. Confirm that the automotive qualification status applies to this specific variant if required for the application. Ensure compatibility with the SOT-23-3 footprint during PCB layout review.

Voltage Reference Selection Notes

Select this part when a stable 3 V reference is needed in space-constrained designs requiring low quiescent current. The series topology allows efficient operation with minimal supply headroom. Consider the Grade A specifications regarding initial accuracy and temperature drift against system error budgets. Verify that the ±5 mA output current capability meets the load requirements.

Voltage Reference Part Context

This component belongs to the AD158x family of micropower, precision series mode voltage references, which includes the AD1582, AD1584, and AD1585 variants offering different nominal output voltages. All members share the same compact SOT-23-3 package and general architectural features, differing primarily in their specific output voltage levels and associated accuracy grades.

Voltage Reference Replacement Considerations

Direct substitutes within the same family include the AD1582, AD1584, and AD1585, provided the output voltage difference is acceptable. Other series references from Analog Devices or competitors may be considered if pinout compatibility and electrical parameters align with the design requirements.

Voltage Reference FAQ

What is the minimum supply voltage required for the AD1583?

The minimum supply voltage is equal to the output voltage plus 200 mV. For the 3 V output version, the minimum input voltage is 3.2 V.

Does the AD1583 support negative load currents?

Yes, the AD1583 can source or sink up to 5 mA of load current.

How does the AD1583 differ from shunt references?

Unlike shunt references, the AD1583 is a series reference that does not require an input series resistor to limit current, thereby eliminating wasted supply current and improving power efficiency.