AD780ARZ-REEL7 - 2.5V/3.0V High Precision Reference | Analog Devices
料号： AD780ARZ-REEL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.05 | $8.05 |
| 10 | $7.5 | $75.00 |
| 100 | $6.8 | $680.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.6 | $5,600.00 |
AD780ARZ-REEL7 概述
A voltage reference is a crucial component in analog and mixed-signal systems, providing a stable and accurate voltage that serves as a benchmark for analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and comparators. The AD780 belongs to the category of series voltage references, which regulate output voltage by controlling the current through a pass element, offering low output impedance and excellent load regulation. This makes it suitable for driving dynamic loads without significant voltage droop.
Key features of the AD780 include a programmable output voltage (2.5V or 3.0V), a wide supply voltage range (up to 36V), and a maximum output current of 10 mA. The device also includes a temperature output pin that can be used as a temperature transducer, providing a voltage proportional to temperature. The AD780 is a pin-compatible performance upgrade for the LT1019(A)-2.5 and the AD680, offering improved specifications and reliability.
Technically, the AD780 utilizes a band gap architecture with laser-trimmed thin-film resistors to achieve high accuracy and low drift. The device operates over a temperature range of -40°C to +85°C (grade A) and is available in multiple grades (A, B, C) with varying accuracy and temperature coefficient specifications. The AD780 also features low quiescent current, making it suitable for battery-powered applications.
Typical applications include precision data acquisition systems, high-resolution ADCs and DACs, industrial process control, and portable instrumentation. The AD780's low noise and high stability make it an excellent choice for reference designs in medical devices, automotive electronics, and communication systems.
When designing with the AD780, it is important to place a 0.1 µF bypass capacitor close to the VIN pin and a 1 µF capacitor on the output to ensure stability. Additionally, the temperature output pin can be used for temperature sensing, but care must be taken to avoid loading it excessively.
直接替换替代料： AD780ARZ-REEL7 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD780ARZ-REEL7 （相同外形与封装尺寸） ——差异在于 Output Voltage, Temperature Coefficient, Wideband Noise Density, Operating Temperature Range, Output Current.
快速对比工具——选择替代料号进行并排对比：
AD780ARZ
✅ 直接替换✓ 有现货
$5.65 / 个
查看数据手册 →AD780BRZ-REEL7
✅ 直接替换✓ 有现货
$5.6 / 个
查看数据手册 →AD780CRZ-REEL7
✅ 直接替换📋 参考替代料（不在目录中）
LT1019A-2.5
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADR06ARZ-REEL7
⚡ 相同封装📋 参考替代料（不在目录中）
AD780ARZ-REEL7 最大额定值与电气特性
| 输出电压 | 2.5V or 3.0V (programmable) |
| Initial Accuracy | ±0.2% (grade A) |
| Temperature Coefficient | 3 ppm/°C (grade A) |
| Output Current | 10 mA (max) |
| Supply Voltage Range | 4.5V to 36V |
| Output Noise (0.1 Hz to 10 Hz) | 4 µV p-p (typ) |
| Wideband Noise Density | 100 nV/√Hz (typ) |
| 静态电流 | 1 mA (typ) |
| 工作温度范围 | -40°C to +85°C (grade A) |
| 封装 | 8-SOIC (SOIC-8) |
| 安装类型 | Surface Mount |
| Temperature Output Pin | Yes |
| Long-Term Stability | 50 ppm/1000 hrs (typ) |
| RoHS 状态 | Compliant |
| Lifecycle | Production |
AD780ARZ-REEL7 引脚配置
| 引脚 1 | VIN — Positive supply input (4.5V to 36V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | VOUT — Reference output (2.5V or 3.0V) |
| 引脚 4 | SEL — Output voltage select: low for 2.5V, high for 3.0V |
| 引脚 5 | TEMP — Temperature output (voltage proportional to temperature) |
| 引脚 6 | NC — No connect |
| 引脚 7 | NC — No connect |
| 引脚 8 | NC — No connect |
典型应用
AD780ARZ-REEL7 适用于 6 应用s: Precision Data Acquisition Systems, Portable Instrumentation, Industrial Process Control, Medical Devices, Automotive Electronics, Communication Systems.
Precision Data Acquisition Systems
The AD780ARZ-REEL7 provides a stable 2.5V or 3.0V reference for high-resolution ADCs and DACs, ensuring accurate conversion. Its low noise (4 µV p-p) and low temperature drift (3 ppm/°C) maintain signal integrity over temperature, making it ideal for industrial data acquisition and instrumentation. The programmable output allows flexibility in system design, and the temperature output pin can be used for on-board temperature monitoring.
推荐
Portable Instrumentation
In battery-powered instruments, the AD780's low quiescent current (1 mA) and wide supply range (up to 36V) enable efficient operation. The 2.5V output is compatible with many low-voltage ADCs, while the 3.0V option supports legacy systems. The small 8-SOIC package saves board space, and the temperature output can be used for environmental compensation in portable meters and field devices.
推荐
Industrial Process Control
The AD780's high accuracy and stability over -40°C to +85°C make it suitable for industrial control loops, PLCs, and sensor conditioning. Its 10 mA output current can drive multiple loads, and the low noise ensures precise analog signal processing. The programmable output allows adaptation to different sensor ranges, and the temperature output aids in thermal management of control cabinets.
推荐
Medical Devices
In medical monitoring equipment, the AD780 provides a reliable reference for vital sign measurement circuits. Its low noise and low drift ensure accurate readings, while the wide supply range accommodates various power architectures. The temperature output can be used for patient temperature monitoring, and the small package is suitable for compact wearable devices.
推荐
Automotive Electronics
The AD780 operates over the automotive temperature range and can handle supply voltages up to 36V, making it suitable for automotive battery monitoring, motor control, and infotainment systems. Its low noise ensures clean references for ADCs in engine control units, and the temperature output can be used for thermal protection. The device's robustness and long-term stability meet automotive reliability requirements.
推荐
Communication Systems
In communication infrastructure, the AD780 provides a stable reference for RF transceivers and baseband processors. Its low noise (100 nV/√Hz) minimizes phase noise in PLLs, and the programmable output allows interface with different logic levels. The temperature output can be used for oscillator compensation, and the wide supply range supports various power rails.
推荐
推荐产品汇总
工程参考数据： AD780ARZ-REEL7 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD780ARZ | AD780BRZ-REEL7 | AD780CRZ-REEL7 | LT1019A-2.5 |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Voltage | 2.5V or 3.0V (programmable) | 2.5V or 3.0V | 2.5V or 3.0V | 2.5V or 3.0V | 2.5V fixed |
| Initial Accuracy | ±0.2% | ±0.2% | ±0.1% | ±0.2% | ±0.05% |
| Temperature Coefficient | 3 ppm/°C | 3 ppm/°C | 3 ppm/°C | 5 ppm/°C | 5 ppm/°C |
| Output Noise (0.1-10 Hz) | 4 µV p-p | 4 µV p-p | 4 µV p-p | 4 µV p-p | 6 µV p-p |
| Temperature Output Pin | Yes | Yes | Yes | Yes | No |
| Supply Voltage Range | 4.5V to 36V | 4.5V to 36V | 4.5V to 36V | 4.5V to 36V | 4.5V to 40V |
关键差异点
- Programmable output voltage (2.5V/3.0V) with temperature output pin （对比 LT1019A-2.5)
- Lower noise (4 µV p-p) compared to LT1019A-2.5 (6 µV p-p) （对比 LT1019A-2.5)
- Multiple grades (A, B, C) for cost/performance optimization （对比 ADR06ARZ-REEL7)
设计说明
Place a 0.1 µF bypass capacitor close to the VIN pin and a 1 µF output capacitor on VOUT to ensure stability. Use low-ESR ceramic capacitors. For best noise performance, add a 0.01 µF capacitor between the TEMP pin and ground to filter noise.
The AD780 dissipates minimal power (typically <10 mW) due to its low quiescent current and output current. However, at maximum output current (10 mA) and high supply voltage (36V), power dissipation can reach 360 mW. Ensure adequate copper area on the PCB for heat dissipation if operating at these extremes.
Do not connect the SEL pin to an undefined voltage; tie it to GND for 2.5V or VIN for 3.0V. Avoid loading the TEMP pin with more than 1 mA, as this can affect accuracy. Also, ensure the supply voltage is at least 4.5V to maintain regulation.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
