AD780BRZ-REEL7 - 2.5V/3.0V High Precision Reference | Analog Devices
MPN: AD780BRZ-REEL7 ✓ 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 |
AD780BRZ-REEL7 Overview
A voltage reference is a precision electronic circuit that produces a constant output voltage regardless of load, temperature, or supply variations. It serves as a fundamental building block in analog and mixed-signal systems, providing a stable reference for ADCs, DACs, and comparators. Voltage references are categorized into series and shunt types, with the AD780 supporting both, making it a versatile choice for a wide range of applications.
Key features of the AD780BRZ-REEL7 include a temperature coefficient of 3 ppm/°C, initial accuracy of ±0.04% for 2.5V and ±0.03% for 3.0V, and extremely low noise of 4 µV p-p from 0.1 Hz to 10 Hz. The device also features a temperature output pin that varies linearly with temperature, enabling it to function as a temperature transducer while providing a stable reference. The AD780 is stable under all load conditions when a 1 µF capacitor is used, eliminating concerns about instability.
Technically, the AD780 utilizes a bandgap reference architecture, which provides excellent temperature stability and low noise. The device operates over a wide supply range of 4V to 36V, making it suitable for both low-voltage and high-voltage systems. Its low dropout voltage and high output current capability allow it to drive heavy loads while maintaining precision. The AD780 is a pin-compatible performance upgrade for the LT1019(A)-2.5 and AD680, offering improved specifications and reliability.
Typical applications include precision data acquisition systems, high-resolution ADCs and DACs, industrial process control, and test and measurement equipment. The AD780's low noise and high accuracy make it ideal for use in medical instrumentation, where precise voltage references are essential for accurate measurements. Its ability to operate in shunt mode also makes it suitable for negative reference generation in bipolar ADC applications.
When designing with the AD780, it is important to place a 1 µF capacitor at the output to ensure stability under all load conditions. Additionally, proper PCB layout with short, low-inductance traces to the output capacitor will minimize noise and improve performance. The temperature output pin can be used for temperature sensing, but care should be taken to avoid loading it excessively, as this may affect reference accuracy.
Drop-in alternatives for AD780BRZ-REEL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD780BRZ-REEL7 (same form factor and footprint) — differing in Output Current, Output Voltage, Operating Temperature Range, Package, Temperature Coefficient.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD780BRZ
✅ Drop-In✓ In Stock
$5.6 / Unit
View Datasheet →AD780ARZ-REEL7
✅ Drop-In✓ In Stock
$5.6 / Unit
View Datasheet →AD780BR-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
LT1019ACS8-2.5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
REF5025IDR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
REF5030AIDGKT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD780BRZ-REEL7 Maximum Ratings & Electrical Characteristics
| Output Voltage | 2.5V / 3.0V (programmable) |
| Initial Accuracy | ±0.04% (2.5V), ±0.03% (3.0V) |
| Temperature Coefficient | 3 ppm/°C |
| Output Current | 10 mA (source/sink) |
| Supply Voltage Range | 4V to 36V |
| Noise (0.1 Hz to 10 Hz) | 4 µV p-p |
| Wideband Noise Density | 100 nV/√Hz |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-SOIC |
| Mounting Type | Surface Mount |
| Reference Type | Series, Shunt |
| Temperature Output Pin | Yes |
| Stability | Stable with 1 µF output capacitor |
| RoHS Status | Compliant |
| Lifecycle | Production |
AD780BRZ-REEL7 Pin Configuration
| Pin 1 | VOUT — Reference output voltage (2.5V or 3.0V) |
| Pin 2 | GND — Ground |
| Pin 3 | TEMP — Temperature output (linear voltage proportional to temperature) |
| Pin 4 | VIN — Positive supply input (4V to 36V) |
| Pin 5 | NC — No connect |
| Pin 6 | NC — No connect |
| Pin 7 | NC — No connect |
| Pin 8 | VOUT — Reference output voltage (2.5V or 3.0V) |
Typical Applications
AD780BRZ-REEL7 is suitable for 6 applications: Precision Data Acquisition Systems, Industrial Process Control, Medical Instrumentation, Test and Measurement Equipment, Audio Equipment, Aerospace and Defense.
Precision Data Acquisition Systems
The AD780BRZ-REEL7 provides a stable 2.5V or 3.0V reference for high-resolution ADCs and DACs, ensuring accurate conversion. Its low noise of 4 µV p-p and temperature coefficient of 3 ppm/°C minimize errors over temperature, making it ideal for 16-bit and higher data acquisition systems. The device's ability to source or sink 10 mA allows it to drive multiple converters or buffer amplifiers without degradation. In a typical system, the AD780 is placed close to the ADC reference input with a 1 µF decoupling capacitor to maintain stability and reduce noise coupling.
Recommended
Industrial Process Control
In industrial environments, the AD780BRZ-REEL7 ensures reliable operation over a wide temperature range (-40°C to +85°C) and supply variations (4V to 36V). Its high accuracy and low drift are critical for process control loops, where measurement errors directly impact product quality. The device's shunt mode capability allows it to generate negative reference voltages, useful for bipolar signal conditioning. With a 1 µF output capacitor, the AD780 remains stable under varying load conditions, ensuring consistent performance in harsh industrial settings.
Recommended
Medical Instrumentation
The AD780BRZ-REEL7's ultra-low noise (4 µV p-p) and high accuracy make it suitable for medical devices such as patient monitors and diagnostic equipment. In ECG or EEG systems, a clean reference voltage is essential to avoid introducing artifacts into the signal. The AD780's temperature output pin can also be used for temperature compensation in medical sensors. Its small 8-SOIC package and low power consumption make it ideal for portable medical devices, where board space and battery life are critical.
Recommended
Test and Measurement Equipment
For benchtop multimeters, data loggers, and calibration equipment, the AD780BRZ-REEL7 provides a stable reference that ensures measurement accuracy. Its programmable output (2.5V or 3.0V) allows flexibility in system design, and its low temperature drift (3 ppm/°C) ensures consistent readings across ambient temperature changes. The device's ability to source or sink 10 mA enables it to drive external loads or reference buffers, making it a versatile choice for precision instrumentation.
Recommended
Audio Equipment
The AD780BRZ-REEL7 can be used as a reference for audio DACs and ADCs, providing a clean, low-noise voltage that preserves audio fidelity. Its low noise (4 µV p-p) and high PSRR ensure that power supply ripple does not affect the audio signal. The device's series mode operation allows it to be used as a precision voltage source for analog audio circuits. With a 1 µF output capacitor, the AD780 maintains stability even with dynamic audio loads, making it suitable for high-end audio equipment.
Recommended
Aerospace and Defense
In aerospace and defense applications, the AD780BRZ-REEL7 offers high reliability and precision over a wide temperature range. Its low temperature coefficient and high accuracy are essential for navigation systems, radar, and communication equipment. The device's wide supply voltage range (4V to 36V) makes it compatible with various power architectures used in avionics. The AD780's robust design and stable operation under harsh conditions make it a trusted choice for mission-critical systems.
Recommended
Recommended Products Summary
Engineering reference data for AD780BRZ-REEL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD780BRZ | AD780ARZ-REEL7 | LT1019ACS8-2.5 | REF5025IDR |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Output Voltage | 2.5V / 3.0V (programmable) | 2.5V / 3.0V (programmable) | 2.5V / 3.0V (programmable) | 2.5V (fixed) | 2.5V (fixed) |
| Initial Accuracy | ±0.04% (2.5V), ±0.03% (3.0V) | ±0.04% (2.5V), ±0.03% (3.0V) | ±0.04% (2.5V), ±0.03% (3.0V) | ±0.05% | ±0.05% |
| Temperature Coefficient | 3 ppm/°C | 3 ppm/°C | 3 ppm/°C | 5 ppm/°C | 3 ppm/°C |
| Output Current | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA |
| Noise (0.1-10 Hz) | 4 µV p-p | 4 µV p-p | 4 µV p-p | 6 µV p-p | 3 µV p-p |
| Supply Voltage Range | 4V to 36V | 4V to 36V | 4V to 36V | 4.5V to 40V | 4.5V to 18V |
Key Differentiators
- Programmable output voltage (2.5V or 3.0V) (vs REF5025IDR)
- Wide supply voltage range (4V to 36V) (vs REF5025IDR)
- Pin-compatible upgrade for LT1019A-2.5 (vs LT1019ACS8-2.5)
Design Notes
Place a 1 µF ceramic capacitor as close as possible to the VOUT pin (pin 1 or 8) to ensure stability under all load conditions. Use short, wide traces to minimize inductance and noise pickup. For best performance, connect the capacitor's ground directly to the GND pin (pin 2) with a low-impedance path.
The AD780BRZ-REEL7 dissipates minimal power in normal operation, but in shunt mode with high supply voltage, power dissipation can increase. Ensure adequate copper area on the PCB for heat dissipation if operating at high supply voltages and output currents. The 8-SOIC package has a thermal resistance of approximately 150°C/W, so keep power dissipation below 500 mW to avoid excessive junction temperature.
Do not leave the TEMP pin (pin 3) unconnected if not used; tie it to ground or leave floating as per datasheet recommendations. Avoid loading the TEMP pin with low impedance, as it may affect reference accuracy. Also, ensure the supply voltage is within the 4V to 36V range to prevent damage or incorrect operation.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
