AD8226BRZ - Wide Supply Range In-Amp | Analog Devices
MPN: AD8226BRZ ✓ نشطAD8226BRZ نظرة عامة
An instrumentation amplifier (in-amp) is a type of differential amplifier that amplifies the difference between two input signals while rejecting common-mode voltages. It is characterized by high input impedance, low offset voltage, and high common-mode rejection ratio (CMRR), making it ideal for interfacing with sensors such as strain gauges, thermocouples, and bridge circuits. In the signal chain hierarchy, an in-amp sits between the sensor and the ADC, providing the necessary gain and buffering to condition small differential signals.
Key features of the AD8226BRZ include a gain range of 1 to 1000 set by a single resistor, a wide supply range, rail-to-rail output, and a low quiescent current of 350 µA typical. It also offers a CMRR of 80 dB minimum at gain 1, and a bandwidth of 1.5 MHz at gain 1. The device is fully specified for operation from -40°C to +125°C, making it suitable for industrial and automotive environments.
Technically, the AD8226 uses a three-op-amp topology with an integrated precision resistor network, providing excellent DC accuracy and stability. The gain-setting resistor is connected between the RG pins, and its value determines the gain according to the formula G = 1 + 49.4 kΩ / RG. The device features internal ESD protection and is available in both SOIC and MSOP packages.
Typical applications include industrial process control, bridge amplifiers, medical instrumentation, and data acquisition systems. Its wide supply range and rail-to-rail output make it particularly suited for single-supply systems where headroom is limited.
When designing with the AD8226BRZ, ensure that the reference pin (pin 5) is properly bypassed with a capacitor to ground to maintain stability. Also, keep the gain-setting resistor close to the RG pins to minimize parasitic capacitance and maintain accuracy.
بدائل مباشرة لـ AD8226BRZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD8226BRZ (نفس عامل الشكل والبصمة) — يختلف في Gain Range, Package, Operating Temperature Range, Bandwidth, CMRR.
AD8227BRZ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←INA826AID
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MCP6N11-005E/SN
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
AD8223ARZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD8226BRZ الحدود القصوى والخصائص الكهربائية
| Amplifier Type | Instrumentation |
| Number of Circuits | 1 |
| Gain Range | 1 to 1000 |
| Gain Setting Method | 1 external resistor |
| Supply Voltage - Single | 2.2 V to 36 V |
| Supply Voltage - Dual | ±1.1 V to ±18 V |
| نوع الخرج | Rail-to-Rail |
| تيار السكون | 350 µA typical |
| CMRR | 80 dB minimum at gain 1 |
| Bandwidth | 1.5 MHz at gain 1 |
| نطاق درجة حرارة التشغيل | -40°C to +125°C |
| العلبة | 8-SOIC |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| نطاق جهد الدخل | Below ground |
تكوين أطراف AD8226BRZ
| دبوس 1 | RG — Gain setting resistor connection |
| دبوس 2 | -IN — Inverting input |
| دبوس 3 | +IN — Non-inverting input |
| دبوس 4 | V- — Negative supply |
| دبوس 5 | REF — Reference voltage input |
| دبوس 6 | OUT — Output |
| دبوس 7 | V+ — Positive supply |
| دبوس 8 | RG — Gain setting resistor connection |
التطبيقات النموذجية
AD8226BRZ مناسب لـ 6 التطبيقs: Industrial Process Control, Bridge Amplifier, Medical Instrumentation, Data Acquisition Systems, Automotive Sensor Interfaces, Portable Battery-Powered Devices.
Industrial Process Control
The AD8226BRZ is ideal for industrial process control systems where precise measurement of sensor signals is critical. Its wide supply range (2.2V to 36V) allows direct operation from 24V industrial buses, while the high CMRR of 80 dB rejects common-mode noise from long sensor leads. The gain range of 1 to 1000, set by a single resistor, enables flexible scaling of signals from thermocouples, RTDs, and strain gauges. The rail-to-rail output ensures maximum dynamic range when interfacing with ADCs, and the -40°C to +125°C temperature range guarantees reliable operation in harsh factory environments.
موصى به
Bridge Amplifier
The AD8226BRZ is well-suited for bridge amplifier applications, such as load cells and pressure sensors. Its high input impedance minimizes loading on the bridge, while the low offset voltage and high CMRR ensure accurate measurement of small differential voltages. The gain range of 1 to 1000 allows amplification of bridge outputs to levels suitable for ADC conversion. The wide supply range supports both single-supply and dual-supply configurations, and the rail-to-rail output maximizes the usable signal range. The device's low quiescent current of 350 µA is beneficial for battery-powered portable scales.
موصى به
Medical Instrumentation
In medical instrumentation, the AD8226BRZ provides precise amplification of bio-potential signals such as ECG and EEG. Its high CMRR of 80 dB rejects common-mode interference from the human body and power lines, while the low noise and wide bandwidth preserve signal fidelity. The gain range of 1 to 1000 allows adjustment for different signal amplitudes, and the rail-to-rail output interfaces directly with ADCs. The device operates from a single 3.3V or 5V supply, making it suitable for portable medical devices. Its -40°C to +125°C temperature range ensures reliable operation in clinical environments.
موصى به
Data Acquisition Systems
The AD8226BRZ is a key component in data acquisition systems, conditioning signals from various sensors before ADC conversion. Its wide supply range and rail-to-rail output allow it to interface with a variety of ADCs, while the gain range of 1 to 1000 provides flexibility in signal scaling. The high input impedance prevents loading of sensor outputs, and the low quiescent current is ideal for multi-channel systems. The device's bandwidth of 1.5 MHz at gain 1 supports moderate-speed sampling, and its -40°C to +125°C temperature range ensures accuracy in industrial data loggers.
موصى به
Automotive Sensor Interfaces
The AD8226BRZ is suitable for automotive sensor interfaces, such as pressure and temperature sensors in engine control units. Its wide supply range (up to 36V) handles automotive battery voltage variations, and the -40°C to +125°C temperature range meets AEC-Q100 requirements for automotive components. The high CMRR rejects noise from the vehicle's electrical system, and the rail-to-rail output interfaces directly with automotive ADCs. The gain range of 1 to 1000 allows conditioning of various sensor outputs, and the low quiescent current minimizes power consumption in always-on systems.
موصى به
Portable Battery-Powered Devices
The AD8226BRZ is ideal for portable battery-powered devices due to its low quiescent current of 350 µA and wide supply range from 2.2V. It can operate directly from a single lithium-ion cell or two AA batteries, making it suitable for handheld instruments and wearable health monitors. The rail-to-rail output maximizes signal swing with limited supply headroom, and the gain range of 1 to 1000 allows amplification of small sensor signals. The device's small SOIC-8 package saves PCB space, and its -40°C to +125°C temperature range ensures reliable operation in various environments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD8226BRZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD8227BRZ | INA826AID | MCP6N11-005E/SN |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Microchip Technology |
| Gain Range | 1 to 1000 | 5 to 1000 | 1 to 1000 | 1 to 1000 |
| Supply Voltage (Single) | 2.2V to 36V | 2.2V to 36V | 2.7V to 36V | 1.8V to 5.5V |
| Quiescent Current | 350 µA | 350 µA | 200 µA | 1 mA |
| CMRR (min at G=1) | 80 dB | 80 dB | 90 dB | 110 dB |
| Bandwidth (at G=1) | 1.5 MHz | 1.5 MHz | 1 MHz | 500 kHz |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
أبرز الفروقات
- Wide supply range up to 36V (مقابلMCP6N11-005E/SN)
- Gain range starts at 1 (مقابلAD8227BRZ)
- Low quiescent current of 350 µA (مقابلMCP6N11-005E/SN)
ملاحظات التصميم
Place the gain-setting resistor (RG) as close to the RG pins (pins 1 and 8) as possible to minimize parasitic capacitance and inductance, which can affect gain accuracy and high-frequency performance. Use a precision resistor with low temperature coefficient for stable gain over temperature.
Bypass the supply pins (V+ and V-) with 0.1 µF ceramic capacitors placed close to the device. For single-supply operation, ensure the reference pin (REF) is properly bypassed with a capacitor to ground to maintain stability and reject noise.
Do not exceed the absolute maximum supply voltage of 36V. Ensure the input voltages stay within the specified input voltage range to avoid saturation of internal transistors. For high gains, be mindful of the gain-bandwidth product; the bandwidth decreases as gain increases.
معلومات الامتثال
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
