ADA4666-2ARMZ-RL7 - 18V, 4MHz CMOS RRIO Op Amp | Analog Devices
料号： ADA4666-2ARMZ-RL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.85 | $1,850.00 |
ADA4666-2ARMZ-RL7 概述
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in analog signal processing to perform mathematical operations such as amplification, filtering, and integration. The ADA4666-2 belongs to the class of CMOS rail-to-rail input/output amplifiers, which are designed to operate with input and output voltages that can swing close to the supply rails, maximizing dynamic range in low-voltage systems. This op amp is part of the broader category of precision amplifiers, which are characterized by low offset voltage, low noise, and high stability over temperature.
Key features of the ADA4666-2 include a wide supply range of 3 V to 18 V, rail-to-rail input and output, low supply current of 725 µA, and a gain-bandwidth product of 4 MHz. The device also offers a low offset voltage of typically 50 µV and a low input bias current of 1 pA, making it ideal for high-impedance sensor interfaces. The CMOS input stage provides very high input impedance, minimizing loading on signal sources.
Technically, the ADA4666-2 uses a unique input and output stage architecture to achieve rail-to-rail operation with very low supply current. The amplifier is stable with capacitive loads up to 100 pF and has a slew rate of 1.5 V/µs. It is specified over the extended industrial temperature range of -40°C to +125°C, ensuring reliable operation in harsh environments. The device is available in an 8-lead MSOP package, which is compact and suitable for space-constrained designs.
Typical applications include battery-powered instrumentation, portable medical devices, sensor signal conditioning, and active filters. The wide supply range and low power consumption make it particularly well-suited for industrial process control and automotive electronics, where both precision and efficiency are critical.
When designing with the ADA4666-2, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The rail-to-rail output stage can drive loads down to 2 kΩ, but for heavier loads, consider using a buffer or increasing the supply voltage to maintain output swing.
直接替换替代料： ADA4666-2ARMZ-RL7 ——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： ADA4666-2ARMZ-RL7 （相同外形与封装尺寸） ——差异在于 Supply Voltage Range, Package, Quiescent Current per Amplifier, Slew Rate, Amplifier Type.
快速对比工具——选择替代料号进行并排对比：
ADA4666-2ARMZ-RL
✅ 直接替换📋 参考替代料（不在目录中）
ADA4666-2ARMZ-R7
✅ 直接替换📋 参考替代料（不在目录中）
ADA4666-2ARMZ
✅ 直接替换📋 参考替代料（不在目录中）
ADA4661-2ARMZ-RL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADA4661-2ARMZ-R7
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADA4666-2ARMZ-RL7 最大额定值与电气特性
| Number of Channels | 2 |
| Supply Voltage Range | 3 V to 18 V |
| Supply Current per Amplifier | 725 µA |
| Gain Bandwidth Product | 4 MHz |
| Slew Rate | 1.5 V/µs |
| Input Offset Voltage | 50 µV (typical) |
| Input Bias Current | 1 pA (typical) |
| Rail-to-Rail Input | Yes |
| Rail-to-Rail Output | Yes |
| Capacitive Load Stability | 100 pF |
| 工作温度范围 | -40°C to +125°C |
| 封装 | 8-MSOP |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Amplifier Type | CMOS |
ADA4666-2ARMZ-RL7 引脚配置
| 引脚 1 | OUT A — Output of amplifier A |
| 引脚 2 | -IN A — Inverting input of amplifier A |
| 引脚 3 | +IN A — Non-inverting input of amplifier A |
| 引脚 4 | V- — Negative supply voltage |
| 引脚 5 | +IN B — Non-inverting input of amplifier B |
| 引脚 6 | -IN B — Inverting input of amplifier B |
| 引脚 7 | OUT B — Output of amplifier B |
| 引脚 8 | V+ — Positive supply voltage |
典型应用
ADA4666-2ARMZ-RL7 适用于 6 应用s: Battery-Powered Instrumentation, Portable Medical Devices, Sensor Signal Conditioning, Active Filters, Industrial Process Control, Automotive Electronics.
Battery-Powered Instrumentation
The ADA4666-2ARMZ-RL7's low supply current of 725 µA and wide supply range of 3 V to 18 V make it ideal for battery-powered instruments. It can operate directly from a 3.3 V or 5 V rail, and its rail-to-rail input/output maximizes dynamic range. The low offset voltage of 50 µV ensures accurate measurement in portable data loggers and handheld multimeters. Its 4 MHz bandwidth supports signal conditioning of sensor outputs without excessive power drain, extending battery life in remote monitoring systems.
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Portable Medical Devices
In portable medical devices such as glucose monitors and pulse oximeters, the ADA4666-2ARMZ-RL7 provides low-power signal conditioning with high accuracy. Its 3 V to 18 V supply range allows operation from a single lithium-ion cell or two alkaline batteries. The rail-to-rail output ensures full-scale signal swing for ADC interfaces, while the low input bias current of 1 pA minimizes errors when interfacing with high-impedance sensors. The extended temperature range of -40°C to +125°C ensures reliable operation in clinical environments.
推荐
Sensor Signal Conditioning
The ADA4666-2ARMZ-RL7 is well-suited for conditioning signals from various sensors, including temperature, pressure, and strain gauges. Its CMOS input stage provides high input impedance, minimizing loading on sensor bridges. The low offset voltage and low bias current preserve signal integrity, while the 4 MHz bandwidth allows amplification of dynamic signals. The rail-to-rail output enables direct interface to ADCs without additional level shifting. The wide supply range accommodates both 5 V and 12 V sensor systems.
推荐
Active Filters
With a gain bandwidth product of 4 MHz, the ADA4666-2ARMZ-RL7 can be used to implement active filters for anti-aliasing and signal reconstruction. Its low supply current makes it suitable for multi-channel filter banks in portable devices. The rail-to-rail input and output allow maximum signal swing, and the low offset voltage ensures DC accuracy in low-frequency filters. The device's stability with capacitive loads up to 100 pF simplifies filter design, and its wide supply range supports both 3.3 V and 5 V logic systems.
推荐
Industrial Process Control
The ADA4666-2ARMZ-RL7 is suitable for industrial process control applications such as PLC analog input modules and transmitter signal conditioning. Its wide supply range of 3 V to 18 V allows operation from 24 V industrial supplies with proper regulation. The extended temperature range and low offset voltage ensure accurate signal processing in harsh environments. The rail-to-rail output enables direct interface to 5 V ADCs, and the low power consumption reduces heat dissipation in densely populated control cabinets.
推荐
Automotive Electronics
In automotive electronics, the ADA4666-2ARMZ-RL7 can be used for battery monitoring, motor control signal conditioning, and sensor interfaces. Its wide supply range of 3 V to 18 V covers typical automotive battery voltages, and the extended temperature range of -40°C to +125°C meets AEC-Q100 Grade 1 requirements (though the device itself is not AEC-Q100 qualified). The low supply current is beneficial for always-on modules, and the rail-to-rail output allows direct interface to microcontrollers. The 4 MHz bandwidth supports PWM signal filtering and current sensing applications.
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推荐产品汇总
工程参考数据： ADA4666-2ARMZ-RL7 ——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 | ADA4666-2ARMZ-RL | ADA4666-2ARMZ-R7 | ADA4661-2ARMZ-RL | AD8606ARZ |
|---|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage Range | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 2.7 V to 5.5 V |
| Supply Current per Amplifier | 725 µA | 725 µA | 725 µA | 300 µA | 1 mA |
| Gain Bandwidth Product | 4 MHz | 4 MHz | 4 MHz | 2 MHz | 10 MHz |
| Input Offset Voltage | 50 µV | 50 µV | 50 µV | 50 µV | 50 µV |
| Rail-to-Rail Input/Output | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
关键差异点
- Wide supply voltage range of 3 V to 18 V （对比 AD8606ARZ)
- Lower supply current of 725 µA （对比 AD8606ARZ)
- Higher bandwidth of 4 MHz （对比 ADA4661-2ARMZ-RL)
设计说明
The ADA4666-2ARMZ-RL7 operates from 3 V to 18 V. For optimal performance, use a low-impedance power supply and place a 0.1 µF ceramic capacitor close to each supply pin (V+ and V-). For noisy environments, add a 10 µF tantalum capacitor in parallel. Ensure the supply voltage does not exceed the absolute maximum rating of 20 V to prevent damage.
For best performance, place the ADA4666-2ARMZ-RL7 close to the signal source to minimize trace inductance. Use a ground plane to reduce noise and provide a low-impedance return path. Keep feedback resistors and input traces short to minimize parasitic capacitance, which can cause instability. For high-impedance sensors, consider a guard ring around the input pins to reduce leakage currents.
Avoid driving capacitive loads greater than 100 pF directly, as this can cause oscillation. If larger loads are required, add a series resistor (e.g., 50 Ω) at the output. Also, ensure the input common-mode voltage stays within the supply rails; although the device is rail-to-rail, exceeding the rails by more than 0.3 V can damage the input stage. Finally, do not leave unused inputs floating; tie them to a suitable voltage, such as mid-supply.
合规信息
RoHS compliance is indicated by the 'Z' in the part number. AEC-Q100 qualification is not specified in the available data.
