AD8223ARZ - Single-Supply Instrumentation Amplifier | Analog Devices
MPN: AD8223ARZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.69 | $36.90 |
| 100 | $3.28 | $328.00 |
| 500 | $2.87 | $1,435.00 |
| 1,000 | $2.46 | $2,460.00 |
AD8223ARZ Overview
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, high common-mode rejection ratio (CMRR), and low offset voltage, making it ideal for precise measurement of small signals in the presence of large common-mode noise. In the signal chain hierarchy, an instrumentation amplifier is a specialized operational amplifier (op-amp) configuration, often used as the front-end of data acquisition systems, sensor interfaces, and medical monitoring equipment.
Key features of the AD8223ARZ include a gain set by a single external resistor, with a default gain of 5 when no resistor is used. The gain can be programmed from 5 to 1000, providing flexibility for various sensor outputs. The device offers a bandwidth of 200 kHz at gain of 5, and a low input offset voltage of 50 µV (max). It also features a high CMRR of 90 dB (min) at gain of 10, ensuring excellent rejection of common-mode interference. The rail-to-rail output swing allows maximum dynamic range in single-supply applications.
Technically, the AD8223 uses a classic three-op-amp instrumentation amplifier architecture, but optimized for single-supply operation. The input stage provides high impedance and low bias current, while the output stage delivers rail-to-rail swing. The device is laser-trimmed for low offset and drift, ensuring accuracy over temperature. It operates over the industrial temperature range of -40°C to +85°C, making it suitable for harsh environments.
Typical applications include medical instrumentation (ECG, EEG, blood pressure monitors), industrial process control (pressure, temperature, and strain gauge sensors), and precision data acquisition systems. The single-supply capability and low cost make it an attractive choice for battery-powered and portable devices.
When designing with the AD8223ARZ, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The reference pin (pin 5) can be used to level-shift the output, allowing the amplifier to interface with ADCs that have a specific input range. For best performance, use precision resistors for the gain-setting resistor to maintain gain accuracy.
Drop-in alternatives for AD8223ARZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD8223ARZ (same form factor and footprint) — differing in Gain Range, CMRR, Supply Voltage - Dual, Supply Voltage - Single, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD8227ARZ
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →AD8226ARZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →AD8220ARZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD8223ARZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 1 |
| Supply Voltage - Single | +3.0 V to +25 V |
| Supply Voltage - Dual | ±1.5 V to ±12.5 V |
| Gain Range | 5 to 1000 |
| Default Gain | 5 |
| Bandwidth | 200 kHz (G=5) |
| Input Offset Voltage | 50 µV (max) |
| CMRR | 90 dB (min, G=10) |
| Output Type | Rail-to-Rail |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Number of Circuits | 1 |
| Amplifier Type | Instrumentation |
AD8223ARZ Pin Configuration
| Pin 1 | RG — Gain setting resistor connection |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply (or ground in single-supply) |
| Pin 5 | REF — Reference voltage for output level shifting |
| Pin 6 | V+ — Positive supply |
| Pin 7 | OUT — Amplifier output |
| Pin 8 | RG — Gain setting resistor connection |
Typical Applications
AD8223ARZ is suitable for 6 applications: Medical Instrumentation, Industrial Process Control, Data Acquisition Systems, Battery-Powered Devices, Sensor Interfaces, Portable Medical Devices.
Medical Instrumentation
The AD8223ARZ is ideal for medical instrumentation such as ECG and EEG monitors. Its high CMRR of 90 dB (min) rejects common-mode noise from the body, while the low input offset voltage of 50 µV ensures accurate biopotential measurement. The single-supply operation from +3.0 V to +25 V allows battery-powered portable devices. The rail-to-rail output maximizes dynamic range for ADC interfacing. With a bandwidth of 200 kHz, it captures essential physiological signals without aliasing. The 8-SOIC package is compact for wearable designs.
Recommended
Industrial Process Control
In industrial process control, the AD8223ARZ conditions signals from pressure, temperature, and strain gauge sensors. Its gain range of 5 to 1000 allows amplification of small sensor outputs to levels suitable for ADCs. The wide supply range of +3.0 V to +25 V accommodates various industrial power rails. The high CMRR rejects interference from motors and power lines. The operating temperature range of -40°C to +85°C ensures reliability in harsh factory environments. The low cost makes it suitable for high-volume applications.
Recommended
Data Acquisition Systems
The AD8223ARZ serves as a front-end amplifier in precision data acquisition systems. Its low input offset voltage and high CMRR ensure accurate measurement of small differential signals. The rail-to-rail output allows direct interfacing with ADCs without additional level shifting. The gain set by a single resistor simplifies calibration. The 200 kHz bandwidth supports moderate-speed sampling. The single-supply operation reduces power supply complexity. The 8-SOIC package is easy to integrate into compact PCB designs.
Recommended
Battery-Powered Devices
The AD8223ARZ is well-suited for battery-powered devices due to its low supply voltage operation down to +3.0 V and low power consumption. The single-supply capability eliminates the need for negative supplies, saving board space and cost. The rail-to-rail output maximizes signal range with limited supply headroom. The small 8-SOIC package is ideal for portable and wearable devices. The industrial temperature range ensures operation in various environments. The low cost makes it attractive for consumer products.
Recommended
Sensor Interfaces
The AD8223ARZ is an excellent choice for sensor interfaces, including strain gauges, thermocouples, and RTDs. Its high input impedance minimizes loading on sensors. The gain range of 5 to 1000 allows amplification of microvolt-level signals. The high CMRR rejects common-mode noise from long sensor leads. The single-supply operation simplifies power design. The rail-to-rail output ensures full-scale utilization of ADC input range. The 8-SOIC package is compatible with standard PCB layouts.
Recommended
Portable Medical Devices
The AD8223ARZ is ideal for portable medical devices like blood pressure monitors and glucose meters. Its low power consumption extends battery life. The single-supply operation from +3.0 V to +25 V allows direct battery connection. The high CMRR ensures accurate readings in the presence of noise. The small 8-SOIC package enables compact device design. The industrial temperature range supports various operating conditions. The low cost makes it suitable for disposable or consumer medical products.
Recommended
Recommended Products Summary
Engineering reference data for AD8223ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8227ARZ | AD8226ARZ | AD8220ARZ | INA128P |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-DIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Supply Voltage (Single) | +3.0 V to +25 V | +2.7 V to +36 V | +2.2 V to +36 V | +4.5 V to +36 V | +4.5 V to +36 V |
| Gain Range | 5 to 1000 | 5 to 1000 | 5 to 1000 | 1 to 1000 | 1 to 10000 |
| Bandwidth | 200 kHz (G=5) | 250 kHz (G=5) | 200 kHz (G=5) | 1.5 MHz (G=1) | 200 kHz (G=5) |
| Input Offset Voltage | 50 µV (max) | 50 µV (max) | 50 µV (max) | 50 µV (max) | 50 µV (max) |
| CMRR | 90 dB (min, G=10) | 90 dB (min, G=10) | 90 dB (min, G=10) | 100 dB (min, G=10) | 120 dB (min, G=10) |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
Key Differentiators
- Low cost with high performance (vs AD8227ARZ)
- Single-supply operation down to +3.0 V (vs AD8220ARZ)
- Industry-standard 8-lead pinout (vs INA128P)
Design Notes
For single-supply operation, connect pin 4 (V-) to ground. Ensure the supply voltage is within the +3.0 V to +25 V range. Use 0.1 µF ceramic capacitors close to the V+ and V- pins for decoupling. For dual-supply operation, connect pin 4 to the negative rail and pin 6 to the positive rail.
Place the gain-setting resistor (RG) close to pins 1 and 8 to minimize parasitic capacitance and maintain gain accuracy. Use precision resistors with low temperature coefficient for stable gain over temperature. Keep input traces short and shielded to reduce noise pickup.
Do not leave the reference pin (pin 5) floating; connect it to a low-impedance reference voltage, typically mid-supply, to set the output common-mode level. Avoid exceeding the absolute maximum supply voltage of 25 V. Ensure the input common-mode voltage is within the specified range to maintain linearity.
Compliance Information
RoHS compliance indicated in product documentation. Other compliance details not specified in provided data.
