AD8226BRZ-RL7 - Wide Supply Range In-Amp | Analog Devices
MPN: AD8226BRZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.55 | $8.55 |
| 10 | $7.86 | $78.60 |
| 100 | $6.52 | $652.00 |
| 500 | $5.48 | $2,740.00 |
| 1,000 | $4.98 | $4,980.00 |
| 3,000 | $4.75 | $14,250.00 |
Drop-in alternatives for AD8226BRZ-RL7 — 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✓ In Stock
$2.95 / Unit
View Datasheet →AD8223ARZ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.46 / Unit
View Datasheet →AD8221ARZ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.29 / Unit
View Datasheet →AD620ARZ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$7.2 / Unit
View Datasheet →INA826AID
✅ Drop-In📋 Reference alternative (not in catalog)
AD8226BRZ-RL7 Maximum Ratings & Electrical Characteristics
| Product Category | Instrumentation Amplifier |
| Number of Channels | 1 Circuit |
| Gain Range | 1 to 1000 (set by 1 external resistor) |
| Single Supply Voltage | 4.5 V to 36 V |
| Dual Supply Voltage | ±2.25 V to ±18 V |
| Quiescent Current | 350 µA typical |
| Gain Error | 0.1% max |
| Gain Drift | 10 ppm/°C max |
| Rail-to-Rail Output | Yes |
| Input Range Below Ground | Yes |
| Operating Temperature Range | -40°C to +125°C |
| Package / Case | 8-SOIC (BRZ suffix) |
| Mounting Type | Surface Mount |
| Topology | Three-op-amp instrumentation amplifier |
| Gain Setting Method | One external resistor |
| Reference Pin | Yes (sets output common-mode voltage) |
AD8226BRZ-RL7 Pin Configuration
| Pin 1 | RG — Gain-setting resistor terminal |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | -VS — Negative supply |
| Pin 5 | REF — Reference pin (sets output common-mode voltage) |
| Pin 6 | OUT — Output |
| Pin 7 | +VS — Positive supply |
| Pin 8 | RG — Gain-setting resistor terminal |
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
AD8226BRZ-RL7 is suitable for 6 applications: Industrial Process Control, Bridge / Load Cell Amplifier, Medical ECG / Patient Monitoring, Data Acquisition Systems, Current Shunt Monitor, Portable / Battery-Powered Instrumentation.
Industrial Process Control
The AD8226BRZ-RL7 is ideal for industrial process control where 4-20 mA loop transmitters run from 24 V supplies. Its 4.5 V to 36 V single-supply range directly handles 24 V rails, while the 350 µA quiescent current keeps the loop budget low. The gain is set with one external resistor, so a single in-amp can serve many sensor types. The rail-to-rail output drives a precision ADC such as the AD7172-2BRUZ, enabling accurate bridge, thermocouple, and pressure sensor measurements in harsh noise environments.
Recommended
Bridge / Load Cell Amplifier
Strain-gauge bridges generate small differential signals riding on a common-mode voltage near mid-supply. The AD8226BRZ-RL7’s wide input range and 0.1% max gain error preserve bridge accuracy, and gains from 1 to 1000 allow a single design to cover 10 kg to 1000 kg load cells. Use a precision metal-film resistor between RG pins to set the exact gain. After amplification, a 24-bit sigma-delta ADC like the AD7799BRUZ digitizes the signal with low noise.
Recommended
Medical ECG / Patient Monitoring
Electrocardiogram (ECG) signals are low-level (0.5-5 mV) and contaminated by large 50/60 Hz common-mode voltages. The AD8226BRZ-RL7 can amplify these signals with high common-mode rejection while its low bias current preserves electrode integrity. Rail-to-rail output allows direct interface to single-supply ADC inputs. A driven-right-leg or reference pin connection can further suppress common-mode noise. The -40°C to +125°C temperature range supports body-worn and clinical monitors.
Recommended
Data Acquisition Systems
Data acquisition systems need a flexible front end with high input impedance and programmable gain. The AD8226BRZ-RL7 delivers gains of 1 to 1000 using one resistor, so channel scaling can be updated without PCB changes. Its 350 µA quiescent current helps keep system power budgets low in multichannel boards. After the in-amp, a high-throughput ADC such as the AD7606BSTZ-4RL can capture synchronized samples. For lower-speed precision, the AD7172-2BRUZ provides 24-bit resolution.
Recommended
Current Shunt Monitor
The AD8226BRZ-RL7 can amplify the small differential voltage across a shunt resistor in high-side current sensing applications. Its input voltage can go below ground, protecting against negative transients during inductive load switching. Set gain with one resistor; for example, 50 A through a 0.1 mΩ shunt produces 5 mV, requiring a gain of 100 to produce a 0.5 V ADC input. Pair with a precision ADC like the AD7124-4BRUZ-RL for industrial monitoring.
Recommended
Portable / Battery-Powered Instrumentation
The AD8226BRZ-RL7 operates from a single supply as low as 4.5 V, making it suitable for two-cell Li-ion or four-cell alkaline systems. With only 350 µA typical quiescent current, it extends battery life in handheld field instruments. The rail-to-rail output maximizes the ADC input range. A zero-drift op amp such as the ADA4522-1ARZ can buffer the output when driving long cables or capacitive loads, while the in-amp remains the precision acquisition front end.
Recommended
Recommended Products Summary
Engineering reference data for AD8226BRZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8227BRZ | AD8223ARZ | AD8221ARZ | AD620ARZ | INA826AID |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Gain Range | 1 to 1000 | 5 to 1000 | [DATA_NEEDED: gain range] | 1 to 1000 | 1 to 1000 | 1 to 1000 |
| Single Supply Voltage | 4.5 V to 36 V | 3.6 V to 36 V | [DATA_NEEDED] | 4.5 V to 36 V | 4.6 V to 36 V | 3.6 V to 36 V |
| Quiescent Current | 350 µA typ | 350 µA typ | [DATA_NEEDED] | [DATA_NEEDED] | 900 µA typ | 350 µA typ |
| Rail-to-Rail Output | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Gain Error | 0.1% max | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Gain range extends down to 1, unlike AD8227BRZ which has a minimum gain of 5 (vs AD8227BRZ)
- Lower quiescent current than AD620ARZ (vs AD620ARZ)
- Native Analog Devices portfolio support with low-cost, wide supply range (vs INA826AID)
Design Notes
For AD8226, gain accuracy depends on the external resistor connected between pins 1 and 8. Use a 1% or better metal-film resistor and minimize parasitic capacitance to avoid frequency response peaking. Keep the gain resistor close to the pins and use a guard ring if the value is high (>100kΩ).
Place 0.1 µF low-ESR ceramic capacitors directly at V+ and V- pins to ground. For single-supply operation, add 10 µF bulk capacitor close to the device to handle load transients. The reference pin should be decoupled to ground with 0.1 µF to keep output common-mode stable.
AD8226 draws only 350 µA typical; however, output stage can source/sink several mA. In battery-powered designs, use a low-dropout regulator upstream and consider shutting down the in-amp with a series switch to save power in standby. Ensure input common-mode remains within specified input range to preserve linearity.
Compliance Information
Compliance not explicitly listed in verified web data. Confirm on the Analog Devices product page for latest RoHS/REACH status.
