AD8227ARZ-RL7 - Wide Supply Range In-Amp | Analog Devices
MPN: AD8227ARZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.15 | $8.15 |
| 10 | $7.32 | $73.20 |
| 100 | $6.1 | $610.00 |
| 500 | $5.34 | $2,670.00 |
| 1,000 | $4.92 | $4,920.00 |
Drop-in alternatives for AD8227ARZ-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-R7
✅ Drop-In📋 Reference alternative (not in catalog)
AD8226BRZ-RL7
✅ Drop-In✓ In Stock
$2.88 / Unit
View Datasheet →AD8226BRZ
✅ Drop-In✓ In Stock
$2.59 / Unit
View Datasheet →INA826AIDR
✅ Drop-In📋 Reference alternative (not in catalog)
INA128UA
✅ Drop-In📋 Reference alternative (not in catalog)
AD8227ARZ-RL7 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Instrumentation Amplifier |
| Number of Circuits | 1 |
| Gain Range | 5 to 1000 |
| Gain Setting Method | Single external resistor |
| Dual Supply Voltage Range | ±1.5 V to ±18 V |
| Single Supply Voltage Range | 2.2 V to 36 V |
| Output Type | Rail-to-Rail Output |
| Input Voltage Range | Wide; includes below negative supply |
| Reference (REF) Pin | Level-shifting input; ESD protected; must not exceed ±VS ±0.3 V |
| Input Bias Current (A Grade) | 27 nA (typical) |
| Package | 8-SOIC |
| Mounting Type | Surface Mount |
| Tape and Reel Option | Yes (-RL7) |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| Supply Current | [DATA_NEEDED: supply current] |
| CMRR | [DATA_NEEDED: CMRR] |
| Input Offset Voltage | [DATA_NEEDED: input offset voltage] |
| Gain Error | [DATA_NEEDED: gain error] |
| Bandwidth (-3 dB) | [DATA_NEEDED: bandwidth] |
| Noise Voltage Density | [DATA_NEEDED: noise voltage density] |
| RoHS Status | [DATA_NEEDED: RoHS status] |
| MSL Level | [DATA_NEEDED: moisture sensitivity level] |
AD8227ARZ-RL7 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 for output level shifting |
| Pin 6 | OUTPUT — Instrumentation amplifier 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-RL7 is suitable for 6 applications: Precision Load Cell / Bridge Amplifier, Industrial Process Control / Current Shunt Sensing, Medical Instrumentation / Biosignal Conditioning, Automotive Sensor Signal Conditioning, Data Acquisition / ADC Driver with Level Shift, Battery-Powered Portable Instrumentation.
Precision Load Cell / Bridge Amplifier
The AD8227ARZ-RL7's gain range of 5 to 1000, set by one external resistor, makes it a practical front end for strain-gauge bridge and load-cell conditioning. With single-supply operation from 2.2V to 36V and an input range that can go below the negative rail, the amplifier can resolve ground-referenced bridge outputs without a dual-rail supply. The rail-to-rail output preserves ADC headroom, while the REF pin can shift the output to a mid-scale level for a single-supply ADC. In a typical 350-ohm bridge, a 10V excitation with 2mV/V sensitivity produces 20mV full-scale signal; setting gain to 100 yields 2V at the output, matching a 0-2.5V ADC window.
Recommended
Industrial Process Control / Current Shunt Sensing
In industrial current sensing, the AD8227ARZ-RL7 amplifies the small differential voltage across a shunt resistor while rejecting common-mode interference from motors, solenoids, and long cable runs. Its ±1.5V to ±18V dual-supply capability allows direct connection to ±15V industrial rails, while the 2.2V to 36V single-supply mode supports 24V plant buses. For a 50mV full-scale shunt signal with a gain of 50, the output becomes 2.5V with rail-to-rail swing. The wide input range tolerates ground shifts and the REF pin can offset the output to fit a controller ADC. This combination is used in PLC analog input cards and motor-drive current monitoring.
Recommended
Medical Instrumentation / Biosignal Conditioning
For electrocardiogram and electromyogram front ends, the AD8227ARZ-RL7 provides differential amplification of small bio-potentials, typically 0.1mV to 5mV with 50/60Hz common-mode noise. A gain of 100 to 200 brings signals into a suitable range for a 24-bit ADC like the AD7172-2BRUZ. The amplifier's low cost and wide supply range allow operation from a single 3.3V battery rail, and the input range below the negative supply simplifies single-supply biosignal designs. Because the output is rail-to-rail, the full ADC input span is usable, maximizing resolution. The REF pin can bias the output to mid-supply for unipolar ADC inputs.
Recommended
Automotive Sensor Signal Conditioning
Automotive pressure, temperature, and position sensors often produce millivolt-level differential outputs on a noisy 12V/24V vehicle bus. The AD8227ARZ-RL7 operates from 2.2V to 36V, tolerating battery voltage excursions, and its wide input range helps reject alternator and ignition noise. A sensor output of 0-100mV with a gain of 30 produces 0-3V, compatible with an automotive ADC front end. The SOIC-8 package fits compact ECU boards, and the single-resistor gain program simplifies calibration across sensor variants. For harsher requirements, confirm whether an AEC-qualified alternative is needed; AD8227ARZ-RL7 is not stated as AEC-Q100 qualified in the provided data.
Recommended
Data Acquisition / ADC Driver with Level Shift
The AD8227ARZ-RL7 REF pin is a key feature for data acquisition systems: tying REF to a 2.048V or 2.5V reference can shift the amplifier output into the input range of a unipolar SAR ADC. This is particularly useful for bipolar sensors in a single-supply system. The rail-to-rail output preserves ADC full-scale range, and the high gain range (5-1000) accommodates low-level transducer outputs directly. Driving a 16-bit ADC like the AD7980BRMZ, the in-amp's output impedance should be buffered or filtered to avoid sampling kickback; a simple RC antialias filter is recommended. The wide supply range also lets the front end run from the same rail as the ADC driver.
Recommended
Battery-Powered Portable Instrumentation
Portable instruments benefit from the AD8227ARZ-RL7's low-voltage single-supply operation from 2.2V (about 2.2V minimum under the AD8227 datasheet), allowing use in 3V coin-cell or 2S Li-ion designs. The low-cost, one-resistor-gain architecture reduces BOM count: an instrumentation front end needs only the amplifier, one gain resistor, and a few decoupling capacitors. Quiescent supply current is [DATA_NEEDED], so a system-level power budget should be verified in the datasheet. The SOIC-8 surface-mount package and tape-and-reel option (-RL7) make it easy for high-volume portable instrument production. The input range below negative supply also enables ground-connected thermocouple or pH probe inputs with a positive-only battery rail.
Recommended
Recommended Products Summary
Engineering reference data for AD8227ARZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8227BRZ-R7 | AD8226BRZ-RL7 | AD8226BRZ | INA826AIDR |
|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Gain Range | 5 to 1000 | 5 to 1000 | 5 to 1000 | 5 to 1000 | 1 to 1000 |
| Dual Supply Voltage Range | ±1.5 V to ±18 V | ±1.5 V to ±18 V | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Single Supply Voltage Range | 2.2 V to 36 V | 2.2 V to 36 V | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Input Bias Current (Typical) | 27 nA | 20 nA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Gain Setting Method | Single external resistor | Single external resistor | Single external resistor | Single external resistor | Single external resistor |
Key Differentiators
- B grade offers lower input bias current in the same SOIC-8 footprint (vs AD8227BRZ-R7)
- Very wide single-supply range down to 2.2V with below-ground input capability (vs INA826AIDR)
- Low-cost one-resistor gain architecture from 5 to 1000 (vs AD8226BRZ-RL7)
Design Notes
Place the external gain-setting resistor as close as possible to the RG pins (pins 1 and 8) on the AD8227ARZ-RL7. Use a low-thermal-drift resistor for precision gain, and keep the traces short and symmetric to minimize parasitic inductance and capacitance. A 0.1uF bypass capacitor on each supply pin close to the package is recommended to maintain stability under transient load conditions.
The AD8227ARZ-RL7 supports dual supplies from ±1.5V to ±18V or a single supply from 2.2V to 36V. When used with a single supply, the REF pin can be biased to mid-supply to maximize output headroom. Remember that the REF pin has ESD diodes and should not be driven more than 0.3V beyond either supply rail. Decouple both supply pins with 0.1uF ceramic capacitors placed within 2mm of the package.
Do not expect the AD8227ARZ-RL7 to swing exactly to both rails under heavy load; rail-to-rail output means close-to-rail swing, but verify the datasheet output voltage versus load curves. Also, avoid exceeding the input common-mode range even though the input range extends below the negative supply. For the best DC accuracy, keep the gain resistor value within the range specified by the AD8227 datasheet formula G = 5 + 80k/RG.
Compliance Information
Compliance data was not present in the verified web snippets. Confirm RoHS, REACH, AEC-Q100, and lead-free status from the Analog Devices AD8227 product page or the latest AD8227 datasheet before qualifying for production.
