Overview
The AD780BR-REEL7, produced by Analog Devices Inc., is an ultrahigh precision band gap reference voltage device. It provides a pin-programmable 2.5 V or 3.0 V output from input voltages ranging between 4.0 V and 36 V. This device is renowned for its low initial error, minimal temperature drift, and low output noise, making it an ideal choice for enhancing the performance of high-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs), as well as general-purpose precision reference applications.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Output Voltage (2.5 V) | V | 2.495 | 2.5 | 2.505 |
| Output Voltage (3.0 V) | V | 2.995 | 3.0 | 3.005 |
| Temperature Drift (-40°C to +85°C) | ppm/°C | - | - | 3 |
| Line Regulation (2.5 V Output) | µV/V | - | - | 10 |
| Line Regulation (3.0 V Output) | µV/V | - | - | 10 |
| Output Noise (0.1 Hz to 10 Hz) | µV p-p | - | 4 | - |
| Output Noise (Wideband Spectral Density) | nV/√Hz | - | 100 | - |
| Quiescent Current | mA | - | - | 1 |
| Operating Temperature Range | °C | -40 | - | 85 |
| Package Type | - | - | SOIC-8 | - |
Key Features
- Pin Programmable Output: The AD780BR-REEL7 allows for pin-programmable 2.5 V or 3.0 V output voltages.
- Ultralow Drift: The device features an ultralow temperature drift of 3 ppm/°C, ensuring high stability over temperature.
- High Accuracy: It offers high accuracy with output voltages of ±1 mV max for both 2.5 V and 3.0 V outputs.
- Low Noise: The AD780BR-REEL7 has extremely low noise, with a wideband spectral noise density of 100 nV/√Hz.
- Low Quiescent Current: The device operates with a low quiescent current of 1 mA max.
- Output Trim Capability: An optional fine-trim connection is provided for applications requiring even higher accuracy.
- Series or Shunt Mode Operation: It can operate in series or shunt mode, allowing for positive or negative output voltages without external components.
- Temperature Output Pin: A temperature output pin provides an output voltage that varies linearly with temperature, enabling it to be used as a temperature transducer.
Applications
- High-Resolution ADCs and DACs: The AD780BR-REEL7 is ideal for enhancing the performance of high-resolution analog-to-digital converters and digital-to-analog converters.
- General-Purpose Precision Reference: It is suitable for any general-purpose precision reference application due to its high accuracy and low noise.
- Temperature Monitoring: The temperature output pin allows it to be configured as a temperature transducer.
- Low Power Applications: Although not the primary target, it can be used in low power applications where high precision is required.
Q & A
- What are the available output voltages of the AD780BR-REEL7?
The AD780BR-REEL7 provides pin-programmable 2.5 V or 3.0 V output voltages.
- What is the temperature drift of the AD780BR-REEL7?
The temperature drift is 3 ppm/°C from -40°C to +85°C.
- What is the noise level of the AD780BR-REEL7?
The device has a wideband spectral noise density of 100 nV/√Hz and typically 4 μV p-p from 0.1 Hz to 10 Hz.
- What is the quiescent current of the AD780BR-REEL7?
The quiescent current is 1 mA max.
- Can the AD780BR-REEL7 be used in series or shunt mode?
Yes, it can operate in both series and shunt modes, allowing for positive or negative output voltages without external components.
- What is the purpose of the temperature output pin on the AD780BR-REEL7?
The temperature output pin provides an output voltage that varies linearly with temperature, enabling it to be used as a temperature transducer.
- In what packages is the AD780BR-REEL7 available?
The AD780BR-REEL7 is available in an 8-lead SOIC package.
- What is the operating temperature range of the AD780BR-REEL7?
The operating temperature range is from -40°C to +85°C.
- Can the AD780BR-REEL7 drive any value of capacitance?
Yes, the AD780BR-REEL7 can drive any value of capacitance, making it highly versatile.
- Is the AD780BR-REEL7 stable under all load conditions?
Yes, the device is stable under all load conditions when a 1 µF bypass capacitor is used on the supply.
