ADR4520

Part: ADR4525BRZ — Analog Devices (ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 family)

Type: Ultralow Noise, High Accuracy Series Voltage Reference

Description: 2.5 V (ADR4525), 3 V to 15 V input, ultralow noise voltage reference with ±0.02% maximum initial error (B grade), 2 ppm/°C maximum temperature coefficient, and 950 μA maximum quiescent current.

Operating Conditions:

• Supply voltage: 3 V to 15 V
• Operating temperature: -40 to +125 °C (A and B grades); C and D grades 0 to +70 °C
• Output current: +10 mA source / -10 mA sink

Absolute Maximum Ratings:

• Max supply voltage: 16 V
• Storage temperature: -65 to +150 °C
• Junction temperature: -65 to +150 °C
• ESD (HBM): 6 kV

Key Specs:

• Output voltage (ADR4525): 2.500 V typical
• Initial output error (B, C, D grade): ±0.02% maximum
• Temperature coefficient (B grade, -40 to +125 °C): 2 ppm/°C maximum (box method)
• Line regulation: 1 ppm/V typical, 10 ppm/V maximum
• Quiescent current: 700 μA typical, 950 μA maximum (-40 to +125 °C, no load)
• Dropout voltage: 500 mV maximum (no load and at IL = 2 mA)
• Output noise (0.1 Hz to 10 Hz): 1.25 μV p-p typical; noise density 41.3 nV/√Hz at 1 kHz
• Ripple rejection: 90 dB typical at 1 kHz
• Long-term drift: 51 ppm typical at 4500 hours (A, B, C grades)

Features:

• Ultralow noise: 1 μV p-p typical at 2.048 V output
• Low thermally induced hysteresis and low long-term drift
• Output sources 10 mA and sinks 10 mA
• Low dropout voltage
• 8-lead SOIC and LCC packages
• AEC-Q100 qualified option (ADR4525W)

Applications:

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

Package:

• 8-lead SOIC (ADR4525BRZ)
• 8-lead LCC

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

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

10203-057

Figure 2. 8-Lead LCC Pin Configuration

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.

Unless otherwise noted, supply voltage (VIN) = 3 V to 15 V, IL = 0 mA, TA = 25°C.

Table 3.

TA = 25°C, unless otherwise noted.

Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability.

Thermal performance is directly linked to printed circuit board (PCB) design and operating environment. Close attention to PCB thermal design is required.