High Precision Shunt Mode

Voltage References

ADR525/ADR530/ADR550

Rev. F

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FEATURES

Ultracompact SC70 and SOT-23-3 packages

Temperature coefficient: 40 ppm/°C (maximum)

2× the temperature coefficient improvement over the

LM4040

Pin compatible with the LM4040/LM4050

Initial accuracy: ±0.2%

Low output voltage noise: 18 μV p-p @ 2.5 V output

No external capacitor required

Operating current range: 50 μA to 15 mA

Industrial temperature range: −40°C to +85°C

APPLICATIONS

Portable, battery-powered equipment

Automotive

Power supplies

Data acquisition systems

Instrumentation and process control

Energy measurement

Table 1. Selection Guide

Part

Voltage (V)

Initial

Accuracy (%)

Temperature

Coefficient

(ppm/°C)

ADR525A

2.5

±0.4

70

ADR525B

2.5

±0.2

40

ADR530A

3.0

±0.4

70

ADR530B

3.0

±0.2

40

ADR550A

5.0

±0.4

70

ADR550B

5.0

±0.2

40

PIN CONFIGURATION

ADR525/

ADR530/

ADR550

TRIM

3

Figure 1. 3-Lead SC70 (KS) and 3-Lead SOT-23-3 (RT)

GENERAL DESCRIPTION

Designed for space-critical applications, the ADR525/ADR530/

ADR550 are high precision shunt voltage references, housed in

ultrasmall SC70 and SOT-23-3 packages. These references feature

low temperature drift of 40 ppm/°C, an initial accuracy of better

than ±0.2%, and ultralow output noise of 18 μV p-p.

Available in output voltages of 2.5 V, 3.0 V, and 5.0 V, the

advanced design of the ADR525/ADR530/ADR550 eliminates

the need for compensation by an external capacitor, yet the

references are stable with any capacitive load. The minimum

operating current increases from a mere 50 μA to a maximum

of 15 mA. This low operating current and ease of use make

these references ideally suited for handheld, battery-powered

applications.

A trim terminal is available on the ADR525/ADR530/ADR550

to allow adjustment of the output voltage over a ±0.5% range,

without affecting the temperature coefficient of the device. This

feature provides users with the flexibility to trim out small

system errors.

For better initial accuracy and wider temperature range, see the

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 family at

www.analog.com.