AD8227ARZ - Wide Supply Range In-Amp | Analog Devices
MPN: AD8227ARZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for AD8227ARZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD8227BRZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD8226ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD8429ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD8227ARZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 1 |
| Gain Range | 5 to 1000 |
| Supply Voltage Range (Dual) | ±2.25 V to ±18 V |
| Supply Voltage Range (Single) | 4.5 V to 36 V |
| 3 dB Bandwidth (G=5) | 250 kHz |
| Slew Rate | 1.2 V/µs |
| Input Bias Current | 27 nA |
| Output Type | Rail-to-Rail |
| Package | 8-SOIC (SOIC-8) |
| Operating Temperature Range | -40°C to +125°C |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| Number of Circuits | 1 |
| Amplifier Type | Instrumentation |
| Current - Supply | [DATA_NEEDED: Current - Supply] |
AD8227ARZ Pin Configuration
| Pin 1 | RG — Gain setting resistor connection |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | -VS — Negative supply |
| Pin 5 | REF — Reference voltage input |
| Pin 6 | OUT — Output |
| Pin 7 | +VS — Positive supply |
| Pin 8 | RG — Gain setting resistor connection |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD8227ARZ is suitable for 6 applications: Industrial Process Control, Medical Instrumentation, Bridge Amplifier, Data Acquisition Systems, Motor Control Current Sensing, Battery Monitoring.
Industrial Process Control
The AD8227ARZ is ideal for industrial process control systems that require precise amplification of sensor signals from pressure, temperature, and flow transducers. Its wide supply range of ±2.25 V to ±18 V allows operation from standard industrial power rails, while the gain range of 5 to 1000 set by a single resistor simplifies calibration. The high CMRR rejects common-mode noise from long cable runs, ensuring accurate signal transmission. The rail-to-rail output maximizes dynamic range when interfacing with ADCs, and the SOIC-8 package fits compact PLC modules. With a bandwidth of 250 kHz at G=5, it can handle fast process variables, making it suitable for closed-loop control systems.
Recommended
Medical Instrumentation
In medical instrumentation, the AD8227ARZ provides high-precision amplification for biopotential signals such as ECG and EEG. Its low input bias current of 27 nA minimizes loading on high-impedance electrodes, and the high CMRR rejects 50/60 Hz interference. The wide supply range supports battery-operated devices with single 5 V supplies, while the rail-to-rail output allows direct connection to ADCs. The gain range of 5 to 1000 enables amplification of microvolt-level signals to full-scale ADC input. The SOIC-8 package is suitable for compact wearable monitors, and the device's low cost makes it viable for disposable medical sensors.
Recommended
Bridge Amplifier
The AD8227ARZ excels as a bridge amplifier for strain gauge and load cell applications. Its high input impedance prevents loading of the bridge, and the gain range of 5 to 1000 allows precise scaling of bridge output. The device's low offset voltage and drift ensure accurate measurement over temperature, while the wide supply range accommodates both 5 V and ±15 V bridge excitation. The rail-to-rail output provides maximum signal swing for ADC interfacing. With a bandwidth of 250 kHz at G=5, it can capture dynamic strain events. The SOIC-8 package is easy to integrate into load cell amplifiers and weigh scale modules.
Recommended
Data Acquisition Systems
The AD8227ARZ 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 direct interfacing with ADCs operating at different voltage levels. The gain range of 5 to 1000 provides flexibility to accommodate sensors with different output levels, from thermocouples to high-voltage shunts. The high CMRR rejects common-mode noise in industrial environments, ensuring signal integrity. The SOIC-8 package is space-efficient for multi-channel DAQ boards, and the low cost enables high-channel-count systems. With a bandwidth of 250 kHz, it supports moderate-speed sampling applications.
Recommended
Motor Control Current Sensing
The AD8227ARZ is well-suited for motor control current sensing, where it amplifies the voltage across a shunt resistor. Its wide supply range allows operation from the motor drive's power rail, and the high CMRR rejects common-mode voltage spikes from PWM switching. The gain range of 5 to 1000 enables precise scaling of shunt voltage to ADC levels, while the rail-to-rail output ensures full utilization of the ADC range. The bandwidth of 250 kHz at G=5 is sufficient for current loop control. The SOIC-8 package is compact for integration into motor drives, and the device's robustness handles industrial environments.
Recommended
Battery Monitoring
The AD8227ARZ is used in battery monitoring systems to amplify the small voltage across current sense resistors, enabling accurate state-of-charge estimation. Its low input bias current minimizes measurement error, and the wide supply range allows operation from the battery voltage itself. The rail-to-rail output interfaces directly with ADCs in battery management ICs. The gain range of 5 to 1000 provides flexibility for different shunt values and current ranges. The SOIC-8 package is suitable for compact battery packs, and the low power consumption extends battery life. The device's precision ensures reliable monitoring over the battery's operating temperature range.
Recommended
Recommended Products Summary
Engineering reference data for AD8227ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8227BRZ | AD8226ARZ | AD8429ARZ |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Gain Range | 5 to 1000 | 5 to 1000 | 5 to 1000 | 1 to 10000 |
| Supply Voltage Range | ±2.25 V to ±18 V | ±2.25 V to ±18 V | ±1.8 V to ±18 V | ±4 V to ±18 V |
| Bandwidth (G=5) | 250 kHz | 250 kHz | 200 kHz | 15 MHz (G=1) |
| Input Bias Current | 27 nA | 20 nA | 25 nA | 150 nA |
| Slew Rate | 1.2 V/µs | 1.2 V/µs | 0.8 V/µs | 20 V/µs |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
Key Differentiators
- Lower input bias current than AD8429ARZ (vs AD8429ARZ)
- Wider supply range than AD8226ARZ (vs AD8226ARZ)
- Lower cost than AD8429ARZ (vs AD8429ARZ)
Design Notes
Decouple the power supply pins with 0.1 µF ceramic capacitors placed as close to the device as possible. For dual-supply operation, use separate capacitors for +VS and -VS. A 10 µF tantalum capacitor in parallel can help filter low-frequency noise. Proper decoupling is critical to maintain the high CMRR and low noise performance of the AD8227ARZ.
For best CMRR performance, keep the input traces balanced and shielded. Route the +IN and -IN traces symmetrically and avoid ground loops. Use a ground plane under the device to reduce noise pickup. The gain-setting resistor should be placed close to the RG pins to minimize parasitic capacitance, which can affect bandwidth at high gains.
The gain-setting resistor must be a precision resistor with low temperature coefficient to maintain gain accuracy. Use 0.1% tolerance or better. Avoid exceeding the absolute maximum supply voltage of ±18 V, as this can damage the device. Also, ensure the reference pin (REF) is properly driven; if unused, connect it to ground or mid-supply to avoid output offset.
Compliance Information
RoHS compliant per distributor data. AEC-Q100 not applicable for this non-automotive grade part.
