AD8615ARZ - Precision 20MHz CMOS RRIO Op Amp | Analog Devices
料号： AD8615ARZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.11 | $21.10 |
| 100 | $1.88 | $188.00 |
| 500 | $1.69 | $845.00 |
| 1,000 | $1.52 | $1,520.00 |
AD8615ARZ 概述
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block in analog electronics, used in signal conditioning, filtering, and instrumentation. The AD8615 belongs to the family of rail-to-rail input/output amplifiers, which allow the input and output to swing close to the supply rails, maximizing dynamic range in low-voltage single-supply systems. This makes it ideal for battery-powered and portable equipment.
Key features of the AD8615ARZ include a patented trimming technique that achieves superior precision without laser trimming, ensuring low offset voltage and drift. The wide bandwidth of 20 MHz and slew rate of 12 V/µs support high-speed signal processing. The low input bias current of 1 pA is critical for high-impedance sensor interfaces, such as photodiode amplifiers. The device also exhibits no phase reversal, maintaining stability even when inputs exceed the common-mode range.
Technically, the AD8615 uses a CMOS process that provides low power consumption (2 mA supply current) while delivering high performance. The rail-to-rail output stage can source and sink 150 mA, enabling direct drive of heavy loads. The amplifier is fully specified for 5 V single-supply operation, but also supports 2.7 V to 5.5 V, making it versatile for various supply rails. The combination of low noise, low bias current, and wide bandwidth makes it suitable for precision data acquisition and sensor conditioning.
Typical applications include photodiode amplifiers, high-impedance sensor interfaces, active filters, integrators, and portable instrumentation. The AD8615ARZ is also used in battery-powered devices where low power and rail-to-rail operation are essential. Its high output current allows it to drive ADCs directly or buffer reference voltages.
When designing with the AD8615ARZ, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. For optimal noise performance, use low-value resistors in the feedback network and keep the input traces short. The device is available in an 8-lead SOIC package (ARZ suffix) and is RoHS compliant.
直接替换替代料： AD8615ARZ ——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： AD8615ARZ （相同外形与封装尺寸） ——差异在于 Amplifier Type, Gain Bandwidth Product, Package, Input Bias Current, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
AD8616ARZ
✅ 直接替换✓ 有现货
$1.82 / 个
查看数据手册 →AD8515ARZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.28 / 个
查看数据手册 →AD8605ARZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.79 / 个
查看数据手册 →OPA340UA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MCP6281-E/SN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD8615ARZ 最大额定值与电气特性
| Amplifier Type | Operational Amplifier |
| Number of Channels | 1 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Offset Voltage (max) | 65 µV |
| Input Bias Current | 1 pA |
| Voltage Noise Density | 8 nV/√Hz |
| Bandwidth | 20 MHz |
| Slew Rate | 12 V/µs |
| Output Current | 150 mA |
| 电源电流 | 2 mA |
| Rail-to-Rail Input/Output | Yes |
| Unity-Gain Stable | Yes |
| No Phase Reversal | Yes |
| 工作温度范围 | -40°C to +125°C |
| 封装 | 8-Lead SOIC (ARZ) |
| RoHS Compliant | Yes |
AD8615ARZ 引脚配置
| 引脚 1 | OUT — Amplifier output |
| 引脚 2 | -IN — Inverting input |
| 引脚 3 | +IN — Non-inverting input |
| 引脚 4 | V- — Negative supply (ground in single-supply) |
| 引脚 5 | NC — No connect |
| 引脚 6 | NC — No connect |
| 引脚 7 | NC — No connect |
| 引脚 8 | V+ — Positive supply |
典型应用
AD8615ARZ 适用于 6 应用s: Photodiode Amplifier, Portable Instrumentation, Active Filters, Sensor Signal Conditioning, Audio Signal Processing, Battery-Powered Devices.
Photodiode Amplifier
The AD8615ARZ is ideal for photodiode amplifier circuits due to its low input bias current of 1 pA and low voltage noise of 8 nV/√Hz. In a transimpedance configuration, the amplifier converts the photodiode current to a voltage with minimal error. The wide 20 MHz bandwidth supports high-speed optical communication and light detection systems. The rail-to-rail output allows maximum dynamic range, and the low supply current makes it suitable for battery-powered optical sensors.
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Portable Instrumentation
The AD8615ARZ is well-suited for portable instrumentation due to its low supply current of 2 mA and operation from 2.7 V to 5.5 V. The rail-to-rail input and output maximize signal range in battery-powered devices. The low offset voltage of 65 µV ensures accurate measurements in data acquisition systems. The high output current of 150 mA allows direct drive of displays or actuators. The small SOIC package is ideal for space-constrained designs.
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Active Filters
The AD8615ARZ is excellent for active filter designs due to its 20 MHz bandwidth and 12 V/µs slew rate. These specifications allow implementation of high-frequency low-pass, high-pass, and band-pass filters with minimal phase error. The low noise and low distortion ensure clean signal processing. The rail-to-rail output enables filters to operate at full supply swing, which is beneficial in single-supply systems. The unity-gain stability simplifies filter design.
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Sensor Signal Conditioning
The AD8615ARZ is ideal for conditioning signals from high-impedance sensors such as pH probes, thermocouples, and piezoelectric sensors. The low input bias current of 1 pA minimizes loading errors, while the low offset voltage ensures accurate DC accuracy. The wide bandwidth supports dynamic sensor signals. The rail-to-rail input allows the amplifier to handle signals near the supply rails, which is common in single-supply sensor systems. The low power consumption is beneficial for remote or battery-powered sensors.
推荐
Audio Signal Processing
The AD8615ARZ can be used in audio applications such as headphone amplifiers and active crossovers due to its low noise and high output current. The 8 nV/√Hz noise density ensures a low noise floor, while the 150 mA output current can drive headphones directly. The 20 MHz bandwidth is more than sufficient for audio frequencies, and the low distortion preserves signal fidelity. The rail-to-rail output maximizes headroom in battery-powered audio devices.
推荐
Battery-Powered Devices
The AD8615ARZ is well-suited for battery-powered devices due to its low supply current of 2 mA and wide supply voltage range of 2.7 V to 5.5 V. The rail-to-rail input and output allow full signal swing even as the battery voltage drops. The low offset voltage and low noise ensure accurate signal processing in portable instruments. The small SOIC package and RoHS compliance make it easy to integrate into compact designs.
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推荐产品汇总
工程参考数据： AD8615ARZ ——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 | AD8616ARZ | AD8515ARZ | OPA340UA |
|---|---|---|---|---|
| Package | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Channels | 1 | 2 | 1 | 1 |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.5 V to 5.5 V |
| Offset Voltage (max) | 65 µV | 65 µV | 100 µV | 500 µV |
| Input Bias Current | 1 pA | 1 pA | 1 pA | 0.5 pA |
| Bandwidth | 20 MHz | 20 MHz | 11 MHz | 5.5 MHz |
| Slew Rate | 12 V/µs | 12 V/µs | 6 V/µs | 6 V/µs |
| Output Current | 150 mA | 150 mA | 70 mA | 50 mA |
| Supply Current | 2 mA | 4 mA (total) | 1.1 mA | 750 µA |
关键差异点
- Higher bandwidth and slew rate （对比 OPA340UA)
- Lower offset voltage （对比 AD8515ARZ)
- Higher output current （对比 MCP6281-E/SN)
设计说明
The AD8615ARZ operates from a single supply of 2.7 V to 5.5 V. Use a 0.1 µF ceramic capacitor close to the V+ pin and a 10 µF tantalum capacitor for bulk decoupling. For dual-supply operation, connect V- to the negative rail and add similar decoupling. Ensure the supply voltage does not exceed the absolute maximum rating of 6 V to prevent damage.
For optimal noise performance, keep the input traces short and use a ground plane. Place the feedback resistor and capacitor close to the inverting input to minimize parasitic capacitance. Use low-value resistors (e.g., 1 kΩ to 10 kΩ) in the feedback network to reduce noise and offset errors. Avoid routing high-speed digital traces near the input pins.
The AD8615ARZ has a rail-to-rail input stage, but the input common-mode range should not exceed the supply rails by more than 0.3 V. Exceeding this can cause phase reversal, although the device is designed to avoid it. Also, the output can source or sink 150 mA, but ensure the total power dissipation does not exceed the package's thermal limits. For high-output-current applications, consider the thermal resistance of the SOIC package.
合规信息
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated for this part.
