GENERAL DESCRIPTION
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.

FEATURES
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
Operating temperature:
A grade and B grade: −40°C to +125°C
C grade and D grade: 0°C to +70°C
Output current: +10 mA source/−10 mA sink
Low quiescent current: 950 μA (maximum)
Low dropout voltage: 300 mV at 2 mA (VOUT ≥ 3 V)
8-lead SOIC and LCC package
AEC-Q100 qualified for automotive applications
Long-term drift: 8 ppm typical at 4500 hours

APPLICATIONS
Precision data acquisition systems
High resolution data converters
High precision measurement devices
Industrial instrumentation
Medical devices
Automotive battery monitoring