Part: ADR4525 — Analog Devices Type: Ultralow Noise, High Accuracy Voltage Reference Description: High precision, low power, low noise voltage reference with ±0.02% maximum initial error, 0.8 ppm/°C temperature coefficient (D grade), and 1 μV p-p output noise (0.1 Hz to 10 Hz) at VOUT of 2.048 V.

Operating Conditions:

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

Absolute Maximum Ratings:

• Max supply voltage: 15 V (from Electrical Characteristics table, VIN max)

Key Specs:

• Output voltage: 2.500 V
• Initial output voltage error (B, C, D Grade): ±0.02%
• Temperature coefficient (D Grade, 0°C to 70°C): 0.8 ppm/°C (box method)
• Quiescent current: 950 μA (maximum)
• Dropout voltage (IL=2mA): 500 mV (maximum)
• Output voltage noise (0.1 Hz to 10 Hz): 1.25 μV p-p (typical)
• Line regulation (-40°C ≤ TA ≤ +125°C): 10 ppm/V (maximum)
• Load regulation (IL = 0 mA to -10 mA sink, 0°C ≤ TA ≤ +70°C): 9 ppm/mA (maximum)

Features:

• Maximum temperature coefficient (TCVOUT): 0.8 ppm/°C (D grade 0°C to 70°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)
• Low quiescent current: 950 μA (maximum)
• Low dropout voltage: 300 mV at 2 mA (VOUT ≥ 3 V)
• 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

Package:

• 8-lead SOIC
• 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

ADR4525BRZ – 8-Lead LCC Package Pinout

Notes

• Package: 8-Lead LCC (Leadless Ceramic Chip)
• DNC pins (1, 8): Do not connect. Do not connect to this pin.
• NIC pin (5): Not internally connected. This pin is not connected internally.
• Output Configuration: The ADR4525BRZ uses a 4-wire Kelvin (force/sense) output configuration to minimize load regulation errors. VOUTFORCE and VOUTSENSE must be connected together at the load for proper operation.
• Input Configuration: VIN is the positive supply input; GNDFORCE and GNDSENSE are the ground pins (force and sense).

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.