Ultra-Low-Noise, High-Accuracy 5.0V Voltage Reference

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 devices are high precision, low power, low noise voltage references featuring ±0.02% B, C, and D grade maximum initial error, excellent temperature stability, and low output noise.

This family of voltage references uses an innovative core topology to achieve high accuracy while offering industry-leading temperature stability and noise performance. The low, thermally induced output voltage hysteresis and low long-term output voltage drift of the devices also improve system accuracy over time and temperature variations.

A maximum operating current of 950 μA and a maximum low dropout voltage of 300 mV allow the devices to function very well in portable equipment.

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 series of references are each provided in an 8-lead SOIC and are available in a wide range of output voltages, all of which are specified over the extended industrial temperature range of −40°C to +125°C.

The ADR4525, ADR4540, and ADR4550 are also available in D, which are in 8 lead LCC package, and C grade with a temperature range of 0°C to 70°C. The ADR4525W, available in an 8‑lead SOIC package, is qualified for automotive applications.

Applications

* Precision data acquisition systems

* High resolution data converters

* High precision measurement devices

* Industrial instrumentation

* Medical devices

* Automotive battery monitoring

* Maximum temperature coefficient (TCVOUT):

* 0.8 ppm/°C (D grade 0°C to 70°C)

* 1 ppm/°C (C grade 0°C to 70°C)

* 2 ppm/°C (B grade −40°C to +125°C)

* 4 ppm/°C (A grade −40°C to +125°C)

* Output noise (0.1 Hz to 10 Hz):

* 1 μV p-p at VOUT of 2.048 V typical

* Initial output voltage error:

* B, C, D grade: ±0.02% (maximum)

* Input voltage range: 3 V to 15 V