Micropower, Low Noise Precision Voltage
References with Shutdown
Compact TSOT-23-5 packages
Low temperature coefficient
B grade: 9 ppm/°C
A grade: 25 ppm/°C
B grade: ±4 mV maximum
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
120 µA maximum in operation
No external capacitor required
Output current: 5 mA
Wide temperature range
−40°C to + 125°C
Portable medical instrumentation
Data acquisition systems
Industrial process controls
The ADR390, ADR391, ADR392, and ADR395 are precision
2.048 V, 2.5 V, 4.096 V, and 5 V band gap voltage references,
respectively, featuring low power and high precision in a tiny
footprint. Using ADI’s patented temperature drift curvature
correction techniques, the ADR39x references achieve a low
9 ppm/°C of temperature drift in the TSOT package.
FUNCTIONAL BLOCK DIAGRAM
1 ADR390/ 5
3 (Not to Scale) 4
Figure 1. 5-Lead TSOT (UJ Suffix)
The ADR39x 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
ADR39x precision voltage references ideally suited for battery-
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