AD8227BRZ-RL7 - Low Cost Wide Supply Range In-Amp | Analog Devices
料号： AD8227BRZ-RL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
AD8227BRZ-RL7 概述
An instrumentation amplifier (in-amp) is a type of differential amplifier that has been optimized for high input impedance, high common-mode rejection, and low offset voltage. It is typically used to amplify small differential signals in the presence of large common-mode voltages, such as those from bridge sensors, thermocouples, and medical instrumentation. The AD8227 belongs to the family of instrumentation amplifiers, which are a subset of operational amplifiers (op amps) designed specifically for precision measurement applications.
Key features of the AD8227 include a wide supply range, rail-to-rail output, and a gain range of 5 to 1000 set by a single external resistor. The device also offers low input bias current and low offset voltage, ensuring accurate signal amplification. The AD8227 is available in an 8-lead SOIC package, which is compact and suitable for space-constrained designs.
Technically, the AD8227 uses a three-op-amp topology with an internal precision resistor network, providing excellent common-mode rejection and gain accuracy. The device is laser-trimmed for low offset voltage and drift, ensuring stable performance over temperature. The wide supply range and rail-to-rail output make it suitable for both single-supply and dual-supply applications.
Typical applications include industrial process control, bridge amplifiers, medical instrumentation, and data acquisition systems. The AD8227's ability to amplify signals near ground without dual supplies makes it ideal for battery-powered and single-supply systems.
When designing with the AD8227, ensure that the external gain-setting resistor is placed close to the device to minimize parasitic capacitance and maintain stability. Also, consider the input common-mode range to avoid clipping the output.
直接替换替代料： AD8227BRZ-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： AD8227BRZ-RL7 （相同外形与封装尺寸） ——差异在于 Gain Range, RoHS Status, Package, Dual Supply Voltage Range, Input Bias Current.
快速对比工具——选择替代料号进行并排对比：
AD8227BRZ-R7
✅ 直接替换📋 参考替代料（不在目录中）
AD8227ARZ-R7
✅ 直接替换📋 参考替代料（不在目录中）
AD8227BRZ
✅ 直接替换✓ 有现货
$2.95 / 个
查看数据手册 →AD8227ARZ
✅ 直接替换✓ 有现货
$3.1 / 个
查看数据手册 →AD8227BRZ-RL
✅ 直接替换📋 参考替代料（不在目录中）
AD8227BRZ-RL7 最大额定值与电气特性
| Amplifier Type | Instrumentation Amplifier |
| Number of Circuits | 1 |
| Gain Range | 5 to 1000 |
| Supply Voltage Range | ±1.5 V to ±18 V (2.2 V to 36 V single supply) |
| Input Bias Current | 20 nA |
| 输出类型 | Rail-to-Rail |
| 封装 | 8-SOIC |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| 引脚数 | 8 |
| 输入电压范围 | Wide input range, can go below negative supply |
| Gain Setting | Single external resistor |
AD8227BRZ-RL7 引脚配置
| 引脚 1 | RG — Gain setting resistor connection |
| 引脚 2 | -IN — Inverting input |
| 引脚 3 | +IN — Non-inverting input |
| 引脚 4 | V- — Negative supply |
| 引脚 5 | REF — Reference voltage |
| 引脚 6 | OUT — Output |
| 引脚 7 | V+ — Positive supply |
| 引脚 8 | RG — Gain setting resistor connection |
典型应用
AD8227BRZ-RL7 适用于 6 应用s: Industrial Process Control, Medical Instrumentation, Bridge Amplifiers, Data Acquisition Systems, Battery-Powered Devices, Automotive Sensor Interfaces.
Industrial Process Control
The AD8227BRZ-RL7 is ideal for industrial process control due to its wide supply range (±1.5 V to ±18 V) and ability to amplify small differential signals from bridge sensors and thermocouples. Its rail-to-rail output allows full use of the supply rails, and the input range can go below the negative supply, enabling single-supply operation. This makes it suitable for 4-20 mA loops and other industrial signal conditioning, where accuracy and noise rejection are critical.
推荐
Medical Instrumentation
In medical instrumentation, the AD8227BRZ-RL7 provides high input impedance and low bias current (20 nA), making it suitable for amplifying signals from ECG, EEG, and other biosensors. Its wide supply range and rail-to-rail output ensure compatibility with battery-powered devices. The ability to amplify signals near ground without dual supplies is particularly beneficial for portable medical devices, where power efficiency and signal integrity are paramount.
推荐
Bridge Amplifiers
The AD8227BRZ-RL7 excels in bridge amplifier applications, such as strain gauge and load cell interfaces. Its high common-mode rejection and low offset voltage ensure accurate measurement of small differential voltages. The single-resistor gain setting (5 to 1000) allows easy adjustment for different sensor sensitivities. The wide supply range supports both 5V and 24V systems, making it versatile for various industrial and automotive sensing applications.
推荐
Data Acquisition Systems
For data acquisition systems, the AD8227BRZ-RL7 provides a cost-effective solution for conditioning analog signals before ADC conversion. Its rail-to-rail output maximizes the dynamic range of the ADC, and the wide input range accommodates various sensor outputs. The low bias current minimizes loading on high-impedance sources, preserving signal integrity. The compact 8-SOIC package is ideal for multi-channel systems where board space is limited.
推荐
Battery-Powered Devices
The AD8227BRZ-RL7 is well-suited for battery-powered devices due to its low power consumption and ability to operate from a single supply as low as 2.2 V. The input range can go below the negative supply, allowing amplification of signals near ground without a negative rail, which simplifies power supply design. This makes it ideal for portable instrumentation, remote sensors, and other low-power applications where efficiency is critical.
推荐
Automotive Sensor Interfaces
In automotive applications, the AD8227BRZ-RL7 can interface with various sensors such as pressure, temperature, and position sensors. Its wide supply range (up to 36 V) is compatible with automotive battery voltages, and its robustness ensures reliable operation in harsh environments. The rail-to-rail output and low offset voltage contribute to accurate signal processing, while the single-resistor gain setting simplifies calibration. This makes it a cost-effective choice for automotive electronic control units.
推荐
推荐产品汇总
工程参考数据： AD8227BRZ-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 | AD8227BRZ-R7 | AD8227ARZ-R7 | AD8227ARMZ-RL |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage Range | ±1.5 V to ±18 V | ±1.5 V to ±18 V | ±1.5 V to ±18 V | ±1.5 V to ±18 V |
| Gain Range | 5 to 1000 | 5 to 1000 | 5 to 1000 | 5 to 1000 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Number of Circuits | 1 | 1 | 1 | 1 |
| RoHS | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Low input bias current of 20 nA （对比 AD8227ARZ-R7)
- Wide supply range up to ±18 V （对比 AD8227ARMZ-RL)
- Single-resistor gain setting （对比 AD8221ARZ)
设计说明
Place the gain-setting resistor (RG) as close to the AD8227BRZ-RL7 as possible to minimize parasitic capacitance and inductance, which can affect gain accuracy and stability. Use a precision resistor with low temperature coefficient for stable gain over temperature. Keep the traces short and direct to the RG pins.
The AD8227BRZ-RL7 operates from ±1.5 V to ±18 V (2.2 V to 36 V single supply). Ensure the supply voltage is within this range and adequately decoupled with 0.1 uF ceramic capacitors close to the V+ and V- pins. For single-supply operation, the input common-mode range must be considered to avoid output clipping.
Do not exceed the absolute maximum supply voltage of 36 V. Also, ensure the input voltages stay within the specified input range to avoid damage. The reference pin (REF) should be driven with a low-impedance source to maintain accuracy. If unused, tie REF to ground or mid-supply as appropriate.
合规信息
RoHS compliance indicated in distributor listings. Other compliance data not specified in provided sources.
