Overview
The AD780BR, 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, low temperature drift, and minimal 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 | Min | Typ | Max |
|---|---|---|---|
| Output Voltage (2.5 V) | 2.495 V | 2.5 V | 2.505 V |
| Output Voltage (3.0 V) | 2.995 V | 3.0 V | 3.005 V |
| Temperature Drift (-40°C to +85°C) | 3 ppm/°C | ||
| Line Regulation (2.5 V Output) | 10 µV/V | ||
| Line Regulation (3.0 V Output) | 10 µV/V | ||
| Noise (Wideband Spectral Noise Density) | 100 nV/√Hz | ||
| Quiescent Current | 1 mA | ||
| Operating Temperature Range | -40°C | +85°C | |
| Package Types | PDIP, SOIC |
Key Features
- Pin Programmable Output: The AD780BR allows for pin-programmable 2.5 V or 3.0 V output.
- Ultralow Drift: Maximum temperature drift of 3 ppm/°C.
- High Accuracy: Output voltage accuracy of ±1 mV max.
- Low Noise: Wideband spectral noise density of typically 100 nV/√Hz.
- Low Quiescent Current: Maximum quiescent current of 1 mA.
- Output Trim Capability: Optional fine-trim connection for higher accuracy.
- Series or Shunt Mode Operation: Can be used in series or shunt mode to provide positive or negative output voltages.
- Temperature Output Pin: Provides an output voltage that varies linearly with temperature, enabling temperature monitoring.
Applications
The AD780BR is suitable for a variety of high-performance applications, including:
- Enhancing the performance of high-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).
- General-purpose precision reference applications.
- Temperature monitoring and control systems due to its temperature output pin.
- Low power applications where high precision and stability are required.
Q & A
- What are the output voltage options for the AD780BR?
The AD780BR provides pin-programmable 2.5 V or 3.0 V output.
- What is the temperature drift specification for the AD780BR?
The maximum temperature drift is 3 ppm/°C over the range of -40°C to +85°C.
- What is the noise performance of the AD780BR?
The device has a wideband spectral noise density of typically 100 nV/√Hz.
- What is the quiescent current of the AD780BR?
The maximum quiescent current is 1 mA.
- Can the AD780BR be used in both series and shunt mode?
Yes, the AD780BR can be used in both series and shunt mode to provide positive or negative output voltages.
- What is the operating temperature range of the AD780BR?
The operating temperature range is from -40°C to +85°C.
- What package types are available for the AD780BR?
The AD780BR is available in PDIP and SOIC packages.
- Does the AD780BR have a temperature output pin?
Yes, the AD780BR provides a temperature output pin that varies linearly with temperature.
- Can the AD780BR be used as a replacement for other reference voltage devices?
Yes, the AD780BR is a pin-compatible performance upgrade for the LT1019(A)-2.5 and the AD680.
- What is the maximum load current the AD780BR can handle?
The AD780BR can source or sink up to 10 mA.
