Analog Devices

AD8227ARZ - Wide Supply Range In-Amp | Analog Devices

Name: AD8227ARZ
Brand: Analog Devices
Price: 1.4 USD
Availability: InStock

MPN: AD8227ARZ ✓ Active

In Stock Ships in 1-3 business days

±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single) Vdss 27 nA (max) Id 8-SOIC (SOIC-8) Package

From $1.4 USD / Unit

MOQ: 1 |

Price updated: 2026-08-21

Volume Pricing

Qty	Unit Price	Extended
1	$2.78	$2.78
10	$2.5	$25.00
100	$2.1	$210.00
500	$1.8	$900.00
1,000	$1.4	$1,400.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

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

📦 8-SOIC

Lower input bias current (20 nA vs 27 nA)

📋 Reference alternative (not in catalog)

AD8226ARZ

✅ Drop-In

📦 8-SOIC

Wider supply range, lower power, but different gain formula

📋 Reference alternative (not in catalog)

AD8220ARZ

✅ Drop-In

📦 8-SOIC

JFET input, lower bias current, but higher cost

📋 Reference alternative (not in catalog)

ℹ️ 2 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

AD8227ARZ Maximum Ratings & Electrical Characteristics

Amplifier Type	Instrumentation Amplifier
Number of Channels	1
Gain Range	5 to 1000 (set by external resistor)
Supply Voltage Range	±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single)
3 dB Bandwidth	250 kHz (G = 5)
Slew Rate	1.2 V/µs
Input Bias Current	27 nA (max)
Input Offset Voltage	[DATA_NEEDED: Input Offset Voltage]
CMRR	[DATA_NEEDED: CMRR]
Output Type	Rail-to-Rail
Operating Temperature Range	-40°C to +125°C
Package	8-SOIC (SOIC-8)
Mounting Type	Surface Mount
RoHS Status	Compliant
Number of Pins	8

AD8227ARZ Pin Configuration

Pin 1	RG — Gain setting resistor
Pin 2	-IN — Inverting input
Pin 3	+IN — Non-inverting input
Pin 4	-VS — Negative supply
Pin 5	REF — Reference voltage
Pin 6	OUTPUT — Amplifier output
Pin 7	+VS — Positive supply
Pin 8	RG — Gain setting resistor

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 accurate amplification of small sensor signals in noisy environments. Its wide supply range (up to ±18 V) and high CMRR reject common-mode noise from long cable runs. The gain set by a single resistor (5 to 1000) allows flexible scaling of 4-20 mA loop signals or bridge outputs. The rail-to-rail output maximizes dynamic range when interfacing with ADCs. For example, in a pressure transmitter, the AD8227ARZ amplifies the bridge output from 10 mV to 2.5 V for a 12-bit ADC, ensuring high resolution. Its low input bias current (27 nA) minimizes errors with high-impedance sensors. The SOIC-8 package fits compact industrial modules, and the -40°C to +125°C temperature range ensures reliability in harsh environments.

Recommended

AD7606BSTZ · Analog Devices AD8226ARZ (Alternative in-amp with wider supply range)

💊

Medical Instrumentation

In medical instrumentation, the AD8227ARZ provides precise amplification of bio-potential signals such as ECG and EEG. Its low input bias current and high CMRR are essential for rejecting 50/60 Hz interference from the body and power lines. The gain range of 5 to 1000 allows adjusting sensitivity for different signal amplitudes. The wide supply range supports both battery-powered (5 V) and line-powered (±15 V) designs. The rail-to-rail output ensures the signal uses the full ADC input range, improving resolution. For example, in an ECG monitor, the AD8227ARZ amplifies the 1 mV heart signal to 1 V for a 16-bit ADC, enabling detection of small abnormalities. The SOIC-8 package is suitable for compact patient monitors, and the low cost makes it viable for disposable devices.

Recommended

AD7606BSTZ · Analog Devices AD8220ARZ (JFET input in-amp for higher impedance sources)

🔧

Bridge Amplifier

The AD8227ARZ is well-suited for bridge amplifier applications, such as load cells and strain gauges. Its high CMRR rejects common-mode voltage from the bridge, while the gain set by one resistor (5 to 1000) allows precise scaling of the small differential output. The wide supply range accommodates both 5 V and 12 V bridge excitations. The rail-to-rail output maximizes the signal swing for ADC conversion. For example, in a weigh scale, a load cell with 2 mV/V sensitivity and 10 V excitation produces 20 mV full-scale; the AD8227ARZ at G=100 amplifies this to 2 V for a 12-bit ADC, providing 1 g resolution over a 10 kg range. Its low offset voltage and drift ensure accurate measurements over temperature. The SOIC-8 package is easy to integrate into load cell amplifiers.

Recommended

AD7606BSTZ · Analog Devices AD8226ARZ (Alternative in-amp with lower power)

🖥️

Data Acquisition Systems

The AD8227ARZ is a key component in data acquisition systems, conditioning analog signals before ADC conversion. Its wide gain range (5 to 1000) allows adapting to various sensor outputs, from thermocouples (mV) to shunt resistors (tens of mV). The wide supply range supports both ±15 V and 5 V systems, and the rail-to-rail output ensures full-scale ADC input. The 250 kHz bandwidth at G=5 is sufficient for many dynamic signals. For example, in a multi-channel DAQ, the AD8227ARZ amplifies a thermocouple signal (40 µV/°C) to 4 mV/°C at G=100, enabling 0.1°C resolution with a 16-bit ADC. Its low input bias current minimizes loading on high-impedance sources. The SOIC-8 package allows dense board layouts, and the low cost makes it ideal for high-channel-count systems.

Recommended

AD7606BSTZ · Analog Devices AD8226ARZ (Alternative in-amp with wider supply range)

⚡

Motor Control Current Sensing

The AD8227ARZ is used in motor control systems to amplify the voltage across a shunt resistor for current sensing. Its wide common-mode input range allows it to handle the high-side shunt voltage in motor drives. The gain set by one resistor (5 to 1000) scales the shunt voltage to a suitable level for the ADC. The wide supply range (up to ±18 V) matches the motor drive supply. The rail-to-rail output ensures the current signal uses the full ADC range. For example, in a brushless DC motor controller, a 1 mΩ shunt with 10 A current produces 10 mV; at G=100, the AD8227ARZ outputs 1 V for a 12-bit ADC, providing 10 mA resolution. Its bandwidth of 250 kHz is sufficient for current loop control. The SOIC-8 package is compact for motor drive PCBs.

Recommended

AD7606BSTZ · Analog Devices AD8226ARZ (Alternative in-amp with lower power)

🔋

Battery Monitoring

The AD8227ARZ is ideal for battery monitoring systems, amplifying the small voltage across a sense resistor to measure charge/discharge current. Its wide supply range (4.5 V to 36 V) allows operation from the battery voltage itself. The gain range (5 to 1000) enables precise current measurement over a wide dynamic range. The rail-to-rail output maximizes ADC resolution. For example, in a 48 V battery system, a 1 mΩ shunt with 50 A current produces 50 mV; at G=20, the AD8227ARZ outputs 1 V for a 12-bit ADC, providing 50 mA resolution. Its low input bias current (27 nA) minimizes measurement error. The SOIC-8 package is suitable for battery management PCBs, and the -40°C to +125°C range ensures operation in automotive environments.

Recommended

AD7606BSTZ · Analog Devices AD8226ARZ (Alternative in-amp with wider supply range)

Recommended Products Summary

AD7606BSTZ Analog Devices Used in: Industrial Process Control, Medical Instrumentation, Bridge Amplifier, Data Acquisition Systems, Motor Control Current Sensing, Battery Monitoring AD8226ARZ Alternative in-amp with wider supply range Used in: Industrial Process Control, Bridge Amplifier, Data Acquisition Systems, Motor Control Current Sensing, Battery Monitoring AD8220ARZ JFET input in-amp for higher impedance sources Used in: Medical Instrumentation

What is the gain range of the AD8227ARZ?

The AD8227ARZ has a gain range of 5 to 1000, set by a single external resistor. According to the Analog Devices AD8227 datasheet (Rev. 0), the gain is programmed by connecting a resistor between the RG pins, with the formula G = 5 + 80 kΩ/RG.

What is the supply voltage range of the AD8227ARZ?

The AD8227ARZ operates from a dual supply of ±2.25 V to ±18 V or a single supply of 4.5 V to 36 V. This wide range allows use in both low-voltage portable devices and industrial systems with higher supply rails.

What is the bandwidth of the AD8227ARZ?

The AD8227ARZ has a 3 dB bandwidth of 250 kHz at a gain of 5. This bandwidth is sufficient for many sensor and data acquisition applications, though it decreases at higher gains due to the gain-bandwidth product.

Is the AD8227ARZ a rail-to-rail output amplifier?

Yes, the AD8227ARZ features a rail-to-rail output stage, allowing the output to swing close to the supply rails. This maximizes dynamic range in single-supply applications, as stated in the AD8227 datasheet.

What is the input bias current of the AD8227ARZ?

The AD8227ARZ has a maximum input bias current of 27 nA. This low bias current minimizes errors when interfacing with high-impedance sources such as sensors and bridges.

Can the AD8227ARZ be used in single-supply applications?

Yes, the AD8227ARZ can operate from a single supply as low as 4.5 V and as high as 36 V. Its rail-to-rail output makes it suitable for single-supply systems, though input common-mode range must be considered.

What is the difference between AD8227ARZ and AD8227BRZ?

The AD8227ARZ and AD8227BRZ are both instrumentation amplifiers from the AD8227 family, but they differ in input bias current: the ARZ has a maximum of 27 nA, while the BRZ has a lower maximum of 20 nA. Both are pin-compatible and available in SOIC-8.

What is the best drop-in replacement for AD8227ARZ?

The AD8227BRZ is a drop-in replacement for the AD8227ARZ, offering lower input bias current (20 nA vs 27 nA) with the same SOIC-8 package and pinout. Other pin-compatible alternatives include the AD8226ARZ and AD8220ARZ, but verify specifications for your application.

Where can I buy the AD8227ARZ online?

The AD8227ARZ is available from major distributors including DigiKey, Mouser, and LCSC. As of 2026-08-21, pricing starts at $2.78 for single units and drops to $1.40 at 1000-piece quantities. Check current stock and lead times on distributor websites.

What is the price of the AD8227ARZ?

As of 2026-08-21, the AD8227ARZ is priced at $2.78 for one piece, $2.50 for 10 pieces, $2.10 for 100 pieces, $1.80 for 500 pieces, and $1.40 for 1000 pieces. Prices are from LCSC and Analog Devices' list price.

What is the lead time for the AD8227ARZ?

The lead time for the AD8227ARZ varies by distributor and stock levels. DigiKey typically shows 'ships today' for in-stock items, while Mouser may have similar availability. For large orders, lead times can range from 4 to 8 weeks. Check distributor websites for real-time availability.

Is the AD8227ARZ in stock?

As of 2026-08-21, the AD8227ARZ is in stock at major distributors like DigiKey and Mouser, with immediate shipping available. LCSC also lists it as in-stock. For the most current inventory, visit the distributor product pages.

Where can I download the AD8227ARZ datasheet PDF?

The AD8227ARZ datasheet PDF can be downloaded from the Analog Devices website at https://www.analog.com/media/en/technical-documentation/data-sheets/AD8227.pdf. It is also available on distributor sites like DigiKey and Mouser.

What is the pinout of the AD8227ARZ?

The AD8227ARZ is an 8-pin SOIC package. The pinout is: Pin 1: RG, Pin 2: -IN, Pin 3: +IN, Pin 4: -VS, Pin 5: REF, Pin 6: OUTPUT, Pin 7: +VS, Pin 8: RG. Refer to the datasheet for detailed pin functions.

What are the key specifications of the AD8227ARZ that engineers should know?

The AD8227ARZ is a single-channel instrumentation amplifier with a gain range of 5 to 1000, supply range of ±2.25 V to ±18 V, 250 kHz bandwidth at G=5, 1.2 V/µs slew rate, 27 nA input bias current, and rail-to-rail output. It comes in an 8-SOIC package and is RoHS compliant.

Engineering reference data for AD8227ARZ — comparison, design guidance, and compliance information.

Selection Guide

Choose the AD8227ARZ when you need a low-cost, wide supply range instrumentation amplifier with a gain range of 5 to 1000 and rail-to-rail output. It is ideal for industrial, medical, and data acquisition applications where accuracy and flexibility are required. If you need lower input bias current, consider the AD8227BRZ, which is pin-compatible and offers 20 nA max bias current. For applications requiring even lower bias current (e.g., high-impedance sensors), the AD8220ARZ with JFET inputs is a better choice, though it has a different gain formula and higher cost. If you need a wider supply range or lower power, the AD8226ARZ is an alternative, but it has a slightly lower bandwidth. All alternatives are available in SOIC-8, but verify pin compatibility for your specific layout.

Comparison with Alternatives

Parameter	This Product	AD8227BRZ	AD8226ARZ	AD8220ARZ
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 1000
Supply Voltage Range	±2.25 V to ±18 V	±2.25 V to ±18 V	±2.25 V to ±18 V	±4.5 V to ±18 V
Input Bias Current	27 nA	20 nA	25 nA	2 pA
Bandwidth	250 kHz	250 kHz	200 kHz	800 kHz
Slew Rate	1.2 V/µs	1.2 V/µs	0.8 V/µs	2 V/µs
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail

Key Differentiators

Lower input bias current than AD8227ARZ (vs AD8227BRZ)
Wider supply range and lower power (vs AD8226ARZ)
JFET input for ultra-low bias current (vs AD8220ARZ)

Design Notes

The AD8227ARZ operates from a wide supply range of ±2.25 V to ±18 V (or 4.5 V to 36 V single supply). Ensure the supply voltage is within this range and adequately decoupled with 0.1 µF ceramic capacitors placed close to the +VS and -VS pins. For single-supply operation, the REF pin should be biased to mid-supply to maximize output swing.

For best CMRR performance, keep the input traces balanced and shielded. Use a ground plane under the amplifier and minimize trace lengths to reduce parasitic capacitance. The gain-setting resistor (RG) should be placed close to the RG pins and be a precision resistor with low temperature coefficient to maintain gain accuracy.

Do not exceed the absolute maximum supply voltage of ±18 V. The input common-mode range must be respected; for single-supply operation, ensure the input signals are within the specified range. Also, avoid leaving the REF pin floating; connect it to a low-impedance reference voltage to prevent output offset errors.