ADR391 Datasheet

• Compact 5-lead TSOT package
• Low temperature coefficient
  • B grade: 9 ppm/°C
  • A grade: 25 ppm/°C
• Initial accuracy
  • B grade: ±4 mV maximum (ADR391)
  • A grade: ±6 mV maximum
• Ultralow output noise: 5 μV p-p (0.1 Hz to 10 Hz)
• Low dropout: 300 mV
• Low supply current
  • 3 μA maximum in shutdown
  • 140 μA maximum in operation
• No external capacitor required
• Output current: 5 mA
• Automotive grade available
• Wide temperature range: −40°C to +125°C

• Battery-powered instrumentation
• Portable medical instrumentation
• Data acquisition systems
• Industrial process controls
• Automotive

The ADR391 are precision 2.5 V band gap voltage references, respectively, featuring low power and high precision in a tiny footprint. Using patented temperature drift curvature correction techniques from Analog Devices, Inc., the ADR39x references achieve a low 9 ppm/°C of temperature drift in the TSOT package.

The ADR391 family of micropower, low dropout voltage references provides a stable output voltage from a minimum supply of 300 mV above the output. Their advanced design eliminates the need for external capacitors, which further reduces board space and system cost. The combination of low power operation, small size, and ease of use makes the ADR391 precision voltage references ideally suited for battery-operated applications.