Micropower, Low Noise Precision Voltage

References with Shutdown

ADR390/ADR391/ADR392/ADR395

Rev. F

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FEATURES

Compact TSOT-23-5 packages

Low temperature coefficient

B grade: 9 ppm/°C

A grade: 25 ppm/°C

Initial accuracy

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

APPLICATIONS

Battery-powered instrumentation

Portable medical instrumentation

Data acquisition systems

Industrial process controls

Automotive

FUNCTIONAL BLOCK DIAGRAM

1

2

3

ADR390/

ADR391/

ADR392/

ADR395

5

4

SHDN

GND

(Not to Scale)

Figure 1. 5-Lead TSOT (UJ Suffix)

Table 1.

Model

Temperature

Coefficient (ppm/°C)

Accuracy (mV)

ADR390B

2.048

9

±4

ADR390A

2.048

25

±6

ADR391B

2.5

9

±4

ADR391A

2.5

25

±6

ADR392B

4.096

9

±5

ADR392A

4.096

25

±6

ADR395B

5.0

9

±5

ADR395A

5.0

25

±6

GENERAL DESCRIPTION

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.

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-

operated applications.