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AD780:  2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference

Product Status:   Production 

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

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. Less

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.

    • 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)

Functional Block Diagram for AD780

AD780 Diagram
Functional Block Diagram for AD780

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

View Full Circuit Note Enlarge
Circuit Benefits and Features:
  • Bidirectional current monitoring
  • High common mode rejection across temperature
  • Output gain and level shift capabilities
Products Used in This Circuit
  • AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
  • AD8210: High Voltage, Bidirectional Current Shunt Monitor
  • AD8274: Very Low Distortion, Precision Difference Amplifier
View Full Circuit Note Enlarge
Circuit Benefits and Features:
  • Measure -48V High Side Current
  • Optimized for High Precision
  • Designed for Wireless Base Station and Telecommunication Equipment
Products Used in This Circuit
  • AD629: High Common-Mode Voltage, Difference Amplifier
  • AD7453: Pseudo Differential, 555 kSPS, 12-Bit A/D Converter in 8-Lead SOT-23
  • AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
  • AD8603: Precision Single MicroPower Rail to Rail Input/Output Low Noise CMOS Operational Amplifier
More
View Full Circuit Note Enlarge
Products Used in This Circuit
  • AD5390: 16-Channel 14-Bit 3 V/5 V Single-Supply Voltage-Output DAC
  • AD5391: 16-Channel 12-Bit 3V/5V Single-Supply Voltage-Output DAC
  • AD5392: 8-Channel 14-Bit Single-Supply Voltage-Output DAC
  • AD7476: 1MSPS, 12-Bit ADC in 6 Lead SOT-23
  • AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
  • ADR431: Ultralow Noise XFET® Voltage References with Current Sink and Source Capability
More
View Full Circuit Note Enlarge
Products Used in This Circuit
  • AD5383: 32-Channel 12-Bit 3 V/5 V Single-Supply Voltage-Output DAC
  • AD7476: 1MSPS, 12-Bit ADC in 6 Lead SOT-23
  • AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
View Full Circuit Note Enlarge
Products Used in This Circuit
  • AD5382: 32-Channel 14-Bit 3 V/5 V Single-Supply Voltage-Output DAC
  • AD7476: 1MSPS, 12-Bit ADC in 6 Lead SOT-23
  • AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
  • ADR431: Ultralow Noise XFET® Voltage References with Current Sink and Source Capability
More
View Full Circuit Note Enlarge
Products Used in This Circuit
  • AD7328: Software Selectable, True Bipolar Input, 8-Channel, 12-Bit Plus Sign A/D Converter
  • AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
  • AD8620: Low Input Bias Current, Wide BW JFET Precision Dual Op Amp

Circuits from the Lab™
Engineered. Tested. Ready to Integrate.

Budgetary Price & Packaging   |   Samples   |   Check Inventory & Purchase

AD780 Model Options
Model Package Pins Temp.
Range		 Packing,
Qty		 Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD780AN Status: Last Time Buy 8 ld PDIP 8 Ind Tube, 50 $5.25 $4.66 N  Material Info PCN/PDN Purchase
AD780ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $4.69 $4.18 Y  Material Info PCN Purchase
AD780AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $5.25 $4.66 N  Material Info Notify Me Purchase
AD780AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $5.25 $4.66 N  Material Info Notify Me Purchase
AD780ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.69 $4.18 Y  Material Info Notify Me Purchase
AD780ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 $4.69 $4.18 Y  Material Info Notify Me Purchase
AD780BN Status: Last Time Buy 8 ld PDIP 8 Ind Tube, 50 $7.53 $7.05 N  Material Info PCN/PDN Purchase
AD780BNZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $6.77 $6.32 Y  Material Info PCN Purchase
AD780BR Status: Production 8 ld SOIC 8 Ind Tube, 98 $7.53 $7.05 N  Material Info Notify Me Purchase
AD780BR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $7.05 N  Material Info Notify Me Purchase
AD780BR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $7.53 $7.05 N  Material Info Notify Me Purchase
AD780BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $6.77 $6.32 Y  Material Info Notify Me Purchase
AD780BRZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $6.32 Y  Material Info Notify Me Purchase
AD780BRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $6.77 $6.32 Y  Material Info Notify Me Purchase
AD780CR Status: Last Time Buy SOIC 150 MIL 8 Ind Tube, 98 $4.54 $4.24 N  Material Info PDN Purchase
AD780CRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.07 $3.79 Y  Material Info Notify Me Purchase
AD780CRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 $4.07 $3.79 Y  Material Info Notify Me Purchase
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