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Analog Devices Inc. AD8227ARZ-R7
- Part No.:
- AD8227ARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8227ARZ-R7.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,106
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Product details
Overview
AD8227ARZ-R7 from Analog Devices is a rail-to-rail output instrumentation amplifier with gain set by a single external resistor (5–1000 V/V), 250 kHz bandwidth at G=5, 100 dB min CMRR, 24 nV/√Hz input voltage noise, and operation from ±1.5 V to ±18 V or 2.2 V to 36 V single supply - used in bridge sensor signal conditioning for industrial process control.
For engineers reviewing the AD8227ARZ-R7 datasheet, AD8227ARZ-R7 pinout, AD8227ARZ-R7 application, or AD8227ARZ-R7 equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options for precision low-power analog front-end design.
Technical Context
The AD8227ARZ-R7 implements a classic three-op-amp architecture: first-stage differential preamplification with current-mode gain setting via RG, followed by a fixed-gain (×5) difference amplifier stage that rejects common-mode voltage. Its pnp-input stage enables input voltages below the negative rail.
It features robust ±40 V overvoltage tolerance on inputs relative to supplies, rail-to-rail output swing (e.g., −VS + 0.2 V to +VS − 0.2 V at −40°C to +85°C), and guaranteed operation from −40°C to +125°C - enabling direct connection to unconditioned bridge sensors in harsh environments without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 5 to 1000 V/V, set by single external resistor RG - simplifies BOM and layout vs. multi-resistor configurations. |
| CMRR (G=5) | ≥100 dB (B Grade, DC–60 Hz) - ensures high rejection of noise common to both bridge legs. |
| Bandwidth (G=5) | 250 kHz - supports dynamic strain measurements up to ~39 kHz full-scale sine response. |
| Input Voltage Noise | 24 nV/√Hz at 1 kHz - enables resolution of µV-level signals from low-output bridges. |
| Supply Range | ±1.5 V to ±18 V dual or 2.2 V to 36 V single - powers directly from industrial 24 V rails or low-voltage battery systems. |
| Quiescent Current | 350 µA typical at +25°C - allows multichannel designs with minimal thermal load in space-constrained enclosures. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, motor control, and factory-floor applications. |
Pinout & Package
AD8227ARZ-R7 is housed in an 8-lead SOIC package (body width 3.9 mm, JEDEC MS-012), with exposed pad not electrically connected. Pin 1 marked by notch or dot; pin numbering follows standard SOIC convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative Input | Inverting input of first-stage preamplifier; accepts signals down to −VS − 0.15 V at −40°C. |
| 2, 3 (RG) | Gain Setting | Resistor placed between these pins sets gain per G = 5 + (80 kΩ/RG); open-circuit yields G = 5. |
| 4 (+IN) | Positive Input | Non-inverting input of first-stage preamplifier; symmetric bias current behavior to −IN. |
| 5 (−VS) | Negative Supply | Reference for internal bias network; must be stable - decoupling recommended within 1 cm. |
| 6 (REF) | Reference Input | Low-impedance-driven node that offsets output: VOUT = G×(V+IN − V−IN) + VREF. |
| 7 (VOUT) | Amplified Output | Rail-to-rail output capable of driving ≥10 kΩ loads to within 0.2 V of either supply at −40°C to +85°C. |
| 8 (+VS) | Positive Supply | Primary power rail; supplies all internal stages including ESD protection diodes and bias generators. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Eliminates trimming and matching errors of discrete resistor networks; supports field-adjustable gain. |
| Inputs protected beyond supplies | Withstands ±35 V input overvoltage at ±5 V supply - removes need for external clamping diodes in bridge interfaces. |
| Input range extends below negative rail | Accepts signals as low as −VS − 0.15 V at −40°C - enables ground-referenced sensor excitation without dual supplies. |
| Specified performance to +125°C | Guaranteed CMRR ≥100 dB, gain error ≤0.04%, and offset drift ≤0.2 µV/°C across full temperature range. |
| Low quiescent current | 350 µA typical enables >10-year battery life in portable data acquisition with 100 Hz sampling. |
Applications
| Industrial Bridge Sensing | Medical Sensor Interface |
|---|---|
Use Scenario: Amplifying mV-level differential outputs from load cells and pressure transducers in PLC analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing gain, common-mode rejection, and rail-to-rail output drive into ADC reference buffers. Use Value: 100 dB CMRR suppresses 50/60 Hz line noise; 24 nV/√Hz noise floor resolves <1 µV signals at 10 Hz bandwidth. | Use Scenario: Conditioning ECG electrode signals in portable patient monitors with battery-powered front ends. IC Role / Device Role / Timing Role: Low-power, high-CMRR amplifier rejecting motion artifact and RF interference while preserving ST-segment fidelity. Use Value: 350 µA supply current extends battery life; −40°C to +125°C rating supports sterilization cycles and body-worn thermal stress. |
| Portable Data Acquisition | Multichannel Industrial I/O |
Use Scenario: Signal conditioning for handheld vibration analyzers measuring piezoelectric sensor outputs. IC Role / Device Role / Timing Role: Wide-supply-range amplifier operating from single 3.3 V or 5 V rail, driving SAR ADCs with minimal external components. Use Value: Single-supply operation from 2.2 V enables direct Li-ion battery interface; 250 kHz bandwidth captures harmonics up to 5th order. | Use Scenario: High-density analog input card for distributed control systems with 32 channels per board. IC Role / Device Role / Timing Role: Space-efficient instrumentation amplifier in 8-lead SOIC enabling 1.27 mm pitch routing and thermal management in zero-airflow chassis. Use Value: MSOP/SOIC footprint compatibility allows layout reuse; 125°C rating permits placement near power converters without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8226ARMZ-R7 | Wider gain range (1–1000 V/V); lower CMRR (90 dB min at G=5); same SOIC/MSOP packages. | Preferred where unity-gain stability or sensor self-test (zero-input) is required; less suitable for high-noise industrial environments. | Select AD8226ARMZ-R7 only if G=1 functionality is mandatory; otherwise AD8227ARZ-R7 provides superior noise and CMRR. |
| INA333AIDRGT | Zero-drift architecture; 0.02 µV/°C max offset drift; higher quiescent current (50 µA vs. 350 µA); 8-pin VSSOP. | Better for DC-critical applications like precision weigh scales; less optimal for battery-powered systems due to higher current. | Choose INA333AIDRGT when sub-µV offset drift dominates system error budget; AD8227ARZ-R7 better balances cost, power, and AC performance. |
Compared with AD8226ARMZ-R7 and INA333AIDRGT, AD8227ARZ-R7 delivers the best combination of low power, high CMRR, and wide supply range for industrial bridge amplification - making it the preferred choice when noise, thermal drift, and supply flexibility are co-primary constraints.
Availability
AD8227ARZ-R7 is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and portable data acquisition requiring stable component supply across extended temperature and voltage ranges.
Supply support for AD8227ARZ-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD8227 belongs to Analog Devices' precision instrumentation amplifier product line, designed specifically for low-cost, robust signal conditioning of bridge and low-level differential sensors in harsh environments.
FAQ
What is the minimum gain setting for AD8227ARZ-R7, and how is it configured?
The AD8227ARZ-R7 has a minimum gain of 5 V/V, achieved by leaving pins 2 and 3 (RG) unconnected. This default configuration uses internal 80 kΩ resistors to realize G = 5 + (80 kΩ / ∞) = 5. Adding an external resistor between RG pins increases gain per G = 5 + (80 kΩ / RG). The AD8227ARZ-R7 does not support gains below 5.
Does AD8227ARZ-R7 support single-supply operation, and what is its lowest usable supply voltage?
Yes, AD8227ARZ-R7 supports true single-supply operation from 2.2 V to 36 V. At 2.2 V, it maintains rail-to-rail output swing and specified CMRR and gain accuracy. Input common-mode range extends from −0.15 V to (VS − 0.9 V) at −40°C, allowing ground-referenced sensor excitation without negative rails - a key capability of the AD8227ARZ-R7.
What is the maximum overvoltage the AD8227ARZ-R7 inputs can withstand without damage?
The AD8227ARZ-R7 inputs tolerate voltages up to ±40 V beyond the supply rails - e.g., with ±5 V supplies, inputs survive −35 V to +45 V continuously. This is specified in Absolute Maximum Ratings (Table 4) and eliminates need for external protection diodes in most bridge amplifier applications, directly enhancing system reliability of the AD8227ARZ-R7.
How does the reference pin (REF) function in AD8227ARZ-R7, and what drive capability is required?
The REF pin of AD8227ARZ-R7 sets the output common-mode level: VOUT = G×(V+IN − V−IN) + VREF. It presents 60 kΩ input resistance and draws 12 µA bias current, requiring a low-impedance source (e.g., op amp buffer or precision voltage divider with ≤1 kΩ Thevenin resistance). Driving REF with noise or impedance mismatch directly modulates output offset - a critical layout consideration for the AD8227ARZ-R7.
Is AD8227ARZ-R7 pin-compatible with other Analog Devices instrumentation amplifiers like AD8221 or AD620?
No, AD8227ARZ-R7 is not pin-compatible with AD8221 or AD620. It uses an 8-pin SOIC/MSOP footprint with unique pin assignments: RG pins (2,3), REF (6), and separate ±VS (5,8). AD8221 uses 8-pin SOIC but assigns pins differently (e.g., REF is pin 1, no dedicated RG pair). Substituting without PCB revision would cause functional failure - always verify pinout before replacing with AD8227ARZ-R7.
AD8227ARZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 250 kHz
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- 13 mA
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8227ARZ-R7 FAQ
1.How can I place an order for AD8227ARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8227ARZ-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD8227ARZ-R7 reliable?
The price and inventory of AD8227ARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8227ARZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8227ARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8227ARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8227ARZ-R7?
AD8227ARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8227ARZ-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD8227ARZ-R7?
For technical support, including AD8227ARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8227ARZ-R7 requirements.
6.How does Aetrix verify that AD8227ARZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8227ARZ-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD8227ARZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8227ARZ-R7?
All AD8227ARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8227ARZ-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD8227ARZ-R7 part is unused and in its original packaging.
Return procedure for AD8227ARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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