AD780BRZ - 2.5V/3.0V High Precision Reference | Analog Devices
MPN: AD780BRZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.05 | $8.05 |
| 10 | $7.5 | $75.00 |
| 100 | $6.8 | $680.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.6 | $5,600.00 |
Drop-in alternatives for AD780BRZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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AD780BRZ Maximum Ratings & Electrical Characteristics
| Reference Type | Series, Shunt, Programmable |
| Output Voltage | ±2.5V, ±3V |
| Tolerance | ±1 mV |
| Temperature Coefficient | 3 ppm/°C |
| Input Voltage Range | 4 V ~ 36 V |
| Output Current | 10 mA |
| Noise | 100 nV/√Hz |
| Quiescent Current | 1 mA max |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-SOIC |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Long-term Stability | Noncumulative |
| RoHS Status | Compliant |
| Lifecycle Status | Production |
AD780BRZ Pin Configuration
| Pin 1 | VIN — Input supply voltage (4V to 36V) |
| Pin 2 | VOUT — Reference output (2.5V or 3.0V) |
| Pin 3 | GND — Ground |
| Pin 4 | TRIM — Output voltage trim |
| Pin 5 | TEMP — Temperature output |
| Pin 6 | NR — Noise reduction |
| Pin 7 | SEL — Output voltage select (2.5V/3.0V) |
| Pin 8 | NC — No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD780BRZ is suitable for 6 applications: Precision Data Acquisition, Industrial Process Control, Medical Instrumentation, Portable Test Equipment, Automotive Electronics, Telecommunications.
Precision Data Acquisition
The AD780BRZ provides a stable 2.5V or 3.0V reference for high-resolution ADCs and DACs. Its low noise (100 nV/√Hz) and low drift (3 ppm/°C) ensure accurate conversions in industrial and laboratory instruments. The wide input range (4V-36V) allows direct connection to various supply rails, simplifying power design. For best performance, place a 0.1µF decoupling capacitor close to the VIN pin and a 1µF capacitor on the output. The temperature output pin can be used for system monitoring without affecting reference accuracy.
Recommended
Industrial Process Control
In industrial environments, the AD780BRZ offers reliable performance over temperature with 3 ppm/°C drift. It can be used as a reference for analog input modules, PLCs, and transmitters. The device's low quiescent current (1 mA) is beneficial for loop-powered instruments. Its series/shunt capability allows flexible configuration. For harsh environments, consider conformal coating and proper PCB layout to minimize noise pickup. The wide input range accommodates 24V industrial supplies directly.
Recommended
Medical Instrumentation
The AD780BRZ's high accuracy (±1 mV) and low noise are critical for medical devices like patient monitors and diagnostic equipment. It provides a stable reference for biosignal acquisition chains. The low power consumption extends battery life in portable devices. The temperature output can be used for patient temperature monitoring. Ensure proper isolation and ESD protection in medical designs. The SOIC package is suitable for compact PCB layouts.
Recommended
Portable Test Equipment
For handheld multimeters and calibrators, the AD780BRZ offers a balance of precision and low power. Its 1 mA quiescent current helps maximize battery life. The programmable output (2.5V/3.0V) provides flexibility for different measurement ranges. The device's small SOIC package saves board space. Use a low-dropout regulator to power the reference from a battery, ensuring stable operation as the battery discharges. The noise reduction pin can be used to further lower noise for sensitive measurements.
Recommended
Automotive Electronics
In automotive applications, the AD780BRZ can be used for battery monitoring, motor control, and sensor interfaces. Its wide input range (up to 36V) handles automotive voltage transients. The low drift ensures accuracy over the -40°C to +85°C temperature range. The device is not AEC-Q100 qualified, but it can be used in non-safety-critical systems. For higher reliability, consider using a qualified alternative. Proper EMC filtering is essential in automotive environments.
Recommended
Telecommunications
The AD780BRZ provides a stable reference for communication systems, including base stations and network equipment. Its low noise is essential for maintaining signal integrity in high-speed data converters. The wide input range allows operation from various telecom supply rails (e.g., 12V, 24V). The device's low power consumption is beneficial for densely populated boards. Use proper grounding and shielding to minimize interference. The temperature output can be used for thermal management.
Recommended
Recommended Products Summary
Engineering reference data for AD780BRZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD780BR | LT1019ACS8-2.5 | MAX6126AASA25 |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated |
| Output Voltage | 2.5V or 3.0V (programmable) | 2.5V or 3.0V (programmable) | 2.5V (fixed) | 2.5V (fixed) |
| Temperature Coefficient | 3 ppm/°C | 3 ppm/°C | 5 ppm/°C | 3 ppm/°C |
| Noise (0.1-10Hz) | 4 µV p-p | 4 µV p-p | 6 µV p-p | 1.3 µV p-p |
| Quiescent Current | 1 mA max | 1 mA max | 1.5 mA max | 0.5 mA max |
| Input Voltage Range | 4V to 36V | 4V to 36V | 4.5V to 40V | 2.7V to 12.6V |
| Output Current | 10 mA | 10 mA | 10 mA | 10 mA |
Key Differentiators
- Programmable output voltage (2.5V or 3.0V) (vs LT1019ACS8-2.5)
- Lower temperature coefficient (3 ppm/°C) (vs LT1019ACS8-2.5)
- Wider input voltage range (4V to 36V) (vs MAX6126AASA25)
Design Notes
For optimal performance, place a 0.1µF ceramic capacitor close to the VIN pin and a 1µF capacitor on the VOUT pin. Use a ground plane to minimize noise. The NR pin can be bypassed with a capacitor to reduce noise further. Ensure the SEL pin is tied to the correct logic level for desired output voltage.
The AD780BRZ has low power dissipation, but in high ambient temperatures, ensure the junction temperature stays within limits. The SOIC package has a thermal resistance of approximately 150°C/W. For most applications, no heatsink is required, but adequate copper area on the PCB helps.
Do not exceed the input voltage rating of 36V. Ensure the output is not loaded beyond 10 mA. The SEL pin must be connected to VOUT for 3.0V output or GND for 2.5V output; floating it may cause undefined behavior. Use precision resistors for trimming if needed.
Compliance Information
RoHS compliant per ADI product page. Not AEC-Q100 qualified.
