AD780ARZ - 2.5V/3.0V High Precision Reference | Analog Devices
N.º da peça: AD780ARZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.05 | $8,05 |
| 10 | $7.45 | $74,50 |
| 100 | $6.85 | $685,00 |
| 500 | $6.25 | $3.125,00 |
| 1.000 | $5.65 | $5.650,00 |
AD780ARZ Visão geral
A voltage reference is a crucial building block in analog and mixed-signal systems, providing a stable and accurate voltage against which other voltages are measured or regulated. The AD780 belongs to the family of precision voltage references, which are essential for ADCs, DACs, and comparators to achieve high resolution and accuracy. As a bandgap reference, it leverages the predictable temperature behavior of a silicon bandgap to produce a stable output, offering a cost-effective alternative to buried Zener references while maintaining high performance.
Key features of the AD780ARZ include a temperature output pin that allows the device to function as a temperature transducer, a trim pin for fine-tuning output voltage, and low quiescent current that increases by only 2 µA/V above 5 V input. The device operates over a wide temperature range of -40°C to +85°C and is available in both SOIC-8 and DIP-8 packages. Its long-term stability is specified as noncumulative, with drift in subsequent 1000-hour periods significantly lower than the first.
The AD780 uses a proprietary bandgap architecture that achieves low noise and high stability without the need for external components. The output can be programmed to 2.5 V or 3.0 V via a logic pin, providing flexibility in system design. The device also features a force and sense configuration for high-accuracy remote sensing, minimizing errors due to trace resistance.
Typical applications include precision data acquisition systems, high-resolution ADCs and DACs, digital voltmeters, and industrial process control. Its low noise and high accuracy make it suitable for medical instrumentation and aerospace test equipment. The AD780 is a pin-compatible performance upgrade for the LT1019(A)-2.5 and the AD680, simplifying upgrades in existing designs.
When designing with the AD780, ensure proper decoupling with a 0.1 µF capacitor close to the VIN pin and a 1 µF capacitor on the output to maintain stability. The trim pin can be used to adjust the output voltage by ±0.5% to meet tight system requirements. For best noise performance, use the optional external noise reduction capacitors as described in the datasheet.
Alternativas drop-in para AD780ARZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD780ARZ (mesmo formato e footprint) — diferindo em Output Voltage, Quiescent Current, Temperature Coefficient, Operating Temperature Range, Output Current.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD780ARZ-REEL7
✅ Drop-In✓ Em estoque
$5.6 / unidade
Ver ficha técnica →AD780BRZ
✅ Drop-In✓ Em estoque
$5.6 / unidade
Ver ficha técnica →ADR06ARZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LT1019A-2.5
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD680ARZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
REF02AU
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD780ARZ Classificações máximas e características elétricas
| Tensão de saída | 2.5 V or 3.0 V (programmable) |
| Output Voltage Accuracy | ±0.2% (A grade), ±0.17% (B grade) |
| Faixa de tensão de entrada | 4 V to 36 V |
| Output Current | 10 mA (max) |
| Output Noise (0.1 Hz to 10 Hz) | 4 µV p-p (typical) |
| Wideband Noise Density | 100 nV/√Hz (typical) |
| Temperature Coefficient | 3 ppm/°C (max, A grade) |
| Corrente de repouso | 1 mA (typical) |
| Long-Term Stability | 50 ppm/1000 hrs (typical) |
| Faixa de temperatura de operação | -40°C to +85°C |
| Encapsulamento | 8-SOIC (SOIC-8) |
| Tipo de montagem | Surface Mount |
| Tipo de saída | Series and Shunt |
| Temperature Output Pin | Yes |
| Trim Pin | Yes |
Configuração de pinos do AD780ARZ
| Pino 1 | TRIM — Output voltage trim pin |
| Pino 2 | VIN — Input supply voltage |
| Pino 3 | GND — Ground |
| Pino 4 | TEMP — Temperature output |
| Pino 5 | VOUT — Reference output |
| Pino 6 | SENSE — Sense pin for remote sensing |
| Pino 7 | SEL — Output voltage select (2.5V or 3.0V) |
| Pino 8 | NC — No connect |
Aplicações típicas
AD780ARZ é adequado para 6 aplicaçãos: Precision Data Acquisition Systems, High-Resolution ADC/DAC Reference, Industrial Process Control, Medical Instrumentation, Test and Measurement Equipment, Aerospace and Defense.
Precision Data Acquisition Systems
The AD780ARZ provides a stable 2.5V or 3.0V reference for high-resolution ADCs and DACs. Its low noise (4 µV p-p) and low temperature coefficient (3 ppm/°C) ensure accurate conversions over temperature. The programmable output allows flexibility in system design, and the force/sense capability minimizes errors from trace resistance. This makes it ideal for multichannel data acquisition systems in industrial and laboratory equipment.
Recomendado
High-Resolution ADC/DAC Reference
In high-resolution converters, the reference voltage directly impacts linearity and noise. The AD780ARZ's ultra-low noise and high accuracy make it an excellent choice for driving the reference input of 16-bit and 24-bit ADCs. Its 10 mA output current can drive multiple converters, and the temperature output pin can be used for system calibration. The device's low quiescent current is beneficial in battery-powered instruments.
Recomendado
Industrial Process Control
Industrial process control systems require stable references for accurate measurement and control loops. The AD780ARZ operates over a wide input range (4V to 36V) and temperature range (-40°C to +85°C), making it suitable for harsh industrial environments. Its long-term stability (50 ppm/1000 hrs) ensures consistent performance over time. The programmable output allows it to interface with various sensor and actuator systems.
Recomendado
Medical Instrumentation
Medical devices such as patient monitors and diagnostic equipment demand high accuracy and reliability. The AD780ARZ's low noise and low drift ensure precise measurements in vital sign monitoring. Its small SOIC-8 package is suitable for compact designs. The temperature output pin can be used for temperature compensation in medical sensors. The device's wide input range accommodates various power supply configurations.
Recomendado
Test and Measurement Equipment
Digital multimeters, precision calibrators, and bench instruments rely on accurate voltage references. The AD780ARZ provides the stability and low noise required for high-resolution measurements. Its programmable output (2.5V or 3.0V) allows it to be used in various calibration circuits. The force/sense capability enables accurate remote sensing, reducing errors in long PCB traces. The device's long-term stability ensures calibration intervals can be extended.
Recomendado
Aerospace and Defense
In aerospace and defense systems, components must meet stringent reliability and performance standards. The AD780ARZ's wide temperature range and low noise make it suitable for avionics, radar, and communication systems. Its high accuracy ensures precise signal processing in navigation and targeting systems. The device's robust design and long-term stability are critical for mission-critical applications.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD780ARZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD780ARZ-REEL7 | AD780BRZ | ADR06ARZ | LT1019A-2.5 | AD680ARZ | REF02AU |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Output Voltage | 2.5V or 3.0V (programmable) | 2.5V or 3.0V (programmable) | 2.5V or 3.0V (programmable) | 2.5V (fixed) | 2.5V (fixed) | 2.5V (fixed) | 5V (fixed) |
| Output Voltage Accuracy | ±0.2% (A grade) | ±0.2% | ±0.17% | ±0.2% | ±0.05% | ±0.4% | ±0.5% |
| Output Noise (0.1-10Hz) | 4 µV p-p | 4 µV p-p | 4 µV p-p | 10 µV p-p | 3 µV p-p | 10 µV p-p | 15 µV p-p |
| Temperature Coefficient | 3 ppm/°C (max) | 3 ppm/°C | 3 ppm/°C | 2 ppm/°C | 5 ppm/°C | 5 ppm/°C | 8.5 ppm/°C |
| Output Current | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA |
| Temperature Output Pin | Yes | Yes | Yes | No | No | No | No |
Principais diferenciais
- Programmable output voltage (2.5V or 3.0V) (vs ADR06ARZ)
- Temperature output pin (vs ADR06ARZ)
- Lower noise (4 µV p-p) (vs ADR06ARZ)
Notas de projeto
Place a 0.1 µF ceramic capacitor close to the VIN pin and a 1 µF capacitor on the VOUT pin to ensure stability. For best noise performance, add a 0.01 µF capacitor between the TRIM and VOUT pins as recommended in the datasheet. Keep traces short and use a ground plane to minimize noise pickup.
The AD780ARZ dissipates minimal power due to its low quiescent current (1 mA typical). However, at high input voltages (e.g., 36V) and maximum output current (10 mA), power dissipation can reach 350 mW. Ensure adequate copper area on the PCB for heat dissipation, especially in high-temperature environments.
Do not exceed the input voltage rating of 36V. The SEL pin must be tied to VOUT for 2.5V output or to GND for 3.0V output; floating it can cause unpredictable behavior. The TRIM pin should not be left unconnected; tie it to VOUT if not used. For remote sensing, connect SENSE to the load point to avoid voltage drops.
Informações de conformidade
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free finish.
