AD780ARZ - 2.5V/3.0V High Precision Reference | Analog Devices
部品番号: AD780ARZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: AD780ARZ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AD780ARZ （同一形状・フットプリント） — 相違点: Output Voltage, Quiescent Current, Temperature Coefficient, Operating Temperature Range, Output Current.
クイック比較ツール — 並列比較する代替部品を選択:
AD780ARZ-REEL7
✅ ドロップイン✓ 在庫あり
$5.6 / 個
データシートを見る →AD780BRZ
✅ ドロップイン✓ 在庫あり
$5.6 / 個
データシートを見る →ADR06ARZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT1019A-2.5
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD680ARZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
REF02AU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
AD780ARZ 最大定格＆電気的特性
| 出力電圧 | 2.5 V or 3.0 V (programmable) |
| Output Voltage Accuracy | ±0.2% (A grade), ±0.17% (B grade) |
| 入力電圧範囲 | 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) |
| 静止電流 | 1 mA (typical) |
| Long-Term Stability | 50 ppm/1000 hrs (typical) |
| 動作温度範囲 | -40°C to +85°C |
| パッケージ | 8-SOIC (SOIC-8) |
| 実装タイプ | Surface Mount |
| 出力タイプ | Series and Shunt |
| Temperature Output Pin | Yes |
| Trim Pin | Yes |
AD780ARZ ピン構成
| ピン 1 | TRIM — Output voltage trim pin |
| ピン 2 | VIN — Input supply voltage |
| ピン 3 | GND — Ground |
| ピン 4 | TEMP — Temperature output |
| ピン 5 | VOUT — Reference output |
| ピン 6 | SENSE — Sense pin for remote sensing |
| ピン 7 | SEL — Output voltage select (2.5V or 3.0V) |
| ピン 8 | NC — No connect |
主な用途
AD780ARZ の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD780ARZ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Programmable output voltage (2.5V or 3.0V) （vs ADR06ARZ)
- Temperature output pin （vs ADR06ARZ)
- Lower noise (4 µV p-p) （vs ADR06ARZ)
設計ノート
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.
コンプライアンス情報
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free finish.
