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AD780:  2.5 V/3.0 V ULTRAHIGH PRECISION BANDGAP VOLTAGE REFERENCE

The AD780 is an ultrahigh precision bandgap reference voltage which provides a 2.5 V or 3.0 V output from inputs between 4.0 V and 36 V. Low initial error and temperature drift combined with low output noise and the ability to drive any value of capacitance make the AD780 the ideal choice for enhancing the performance of high resolution ADCs and DACs and for any general purpose precision reference ...More

AD780:  2.5 V/3.0 V ULTRAHIGH PRECISION BANDGAP VOLTAGE REFERENCE

Product Description

The AD780 is an ultrahigh precision bandgap reference voltage which provides a 2.5 V or 3.0 V output from inputs between 4.0 V and 36 V. Low initial error and temperature drift combined with low output noise and the ability to drive any value of capacitance make the AD780 the ideal choice for enhancing the performance of high resolution ADCs and DACs and for any general purpose precision reference application. A unique low headroom design facilitates a 3.0 V output from a 5.0 V ± 10% input, providing a 20% boost to the dynamic range of an ADC, over performance with existing 2.5 V references.

The AD780 can be used to source or sink up to 10 mA and can be used in series or shunt mode, thus allowing positive or negative output voltages without external components. This makes it suitable for virtually any high performance reference application. Unlike some competing references, the AD780 has no "region of possible instability." The part is stable under all load conditions when a 1 µF bypass capacitor is used on the supply.

A temperature output pin is provided on the AD780. This provides an output voltage that varies linearly with temperature, allowing the AD780 to be configured as a temperature transducer while providing a stable 2.5 V or 3.0 V output.

The AD780 is a pin-compatible performance upgrade for the LT1019(A)-2.5 and the AD680. The latter is targeted toward low power applications.

The AD780 is available in two grades in plastic DIP, SOIC and cerdip packages. The AD780AN, AD780AR, AD780BN and AD780BR are specified for operation from -40°C to +85°C. The AD780SQ and AD780SQ/883B are specified for -55°C to +125°C operation.

RESOURCES & TOOLS

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  • Pin Programmable 2.5 V or 3.0 V Output
  • Ultralow Drift: 3 ppm/°C max
  • High Accuracy: 2.5 V or 3.0 V, ±1 mV max
  • Low Noise: 100 nV/√Hz
  • Noise Reduction Capability
  • Low Quiescent Current: 1 mA max
  • Output Trim Capability
  • Plug-in Upgrade for Present References
  • Temperatue Output PIN
  • Series or Shunt Mode Operation 2.5 V, ±3.0 V)
  • Vout: 2.5
  • Initial Accuracy (%): 0.04
  • Ref Out TC (ppm/C): 3ppm/C
  • Supply Voltage Range (V): +4 to +36
  • Supply Current : 1mA
  • Ref Output Current (mA): 10mA
  • 0.1-10 Hz Noise (µV p-p): 4µV p-p
  • Temp Range(s): -40 to +85
  • Package: DIP,SOIC
  • Reference Type: Series-Multi/Select Out

Functional Block Diagram for AD780

AD780 Diagram
Functional Block Diagram for AD780

Circuits from the Lab

Find more at our Circuits Library.

Of Note ...

Instrumentation designers who purchased the AD780 also bought:
AD829 - High Speed, Low Noise Video Op Amp
AD9042 - 12-Bit, 41 MSPS Monolithic A/D Converter
AD7244 - 12-/14-Bit DAC, 3 V Buried Zener Reference, DAC
AD7528 - CMOS Dual 8-Bit Buffered Multiplying DAC
AD744 - Precision, 500 ns Settling BiFET Op Amp

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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.