Overview
The AD780BN, produced by Analog Devices Inc., is an ultrahigh precision band gap reference voltage. 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 component is designed to offer low initial error, low temperature drift, and low output noise, making it ideal 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 |
| Output Voltage 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 | ||
| Input Voltage Range | 4 V | 36 V | |
| Supply Current | 1 mA | ||
| Output Current | 10 mA | ||
| Noise (0.1 Hz to 10 Hz) | 4 µV p-p | ||
| Noise Density | 100 nV/√Hz | ||
| Operating Temperature Range | -40°C | +85°C | |
| Package Type | 8-DIP (0.300", 7.62mm) |
Key Features
- Pin-programmable 2.5 V or 3.0 V output
- Ultralow drift: 3 ppm/°C max
- High accuracy: ±1 mV max
- Low noise: 100 nV/√Hz
- Low quiescent current: 1 mA max
- Output trim capability
- Plug-in upgrade for present references
- Temperature output pin for monitoring system ambient temperature
- Series or shunt mode operation (±2.5 V, ±3.0 V)
- Stable under all load conditions with a 1 µF bypass capacitor
Applications
- High-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- General-purpose precision reference applications
- Temperature transducer applications using the temperature output pin
- Enhancing the performance of high-precision analog circuits
Q & A
- What are the output voltage options for the AD780BN?
The AD780BN provides pin-programmable 2.5 V or 3.0 V output voltages.
- What is the temperature drift specification for the AD780BN?
The temperature drift is specified as 3 ppm/°C from -40°C to +85°C.
- What is the input voltage range for the AD780BN?
The input voltage range is from 4 V to 36 V.
- How much current can the AD780BN source or sink?
The AD780BN can source or sink up to 10 mA.
- What is the noise performance of the AD780BN?
The noise is typically 4 µV p-p from 0.1 Hz to 10 Hz and has a wideband spectral noise density of 100 nV/√Hz.
- Can the AD780BN be used as a temperature transducer?
Yes, the AD780BN has a temperature output pin that varies linearly with temperature, allowing it to be configured as a temperature transducer.
- What are the package options for the AD780BN?
The AD780BN is available in 8-DIP (0.300", 7.62mm) packages.
- Is the AD780BN stable under all load conditions?
Yes, the AD780BN is stable under all load conditions when a 1 µF bypass capacitor is used on the supply.
- Can the AD780BN be used in series or shunt mode?
Yes, the AD780BN can be used in series or shunt mode, allowing positive or negative output voltages without external components.
- What is the operating temperature range for the AD780BN?
The operating temperature range is from -40°C to +85°C.
