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Analog Devices Inc. AD8227BRMZ-R7
- Part No.:
- AD8227BRMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8227BRMZ-R7.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,566
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Product details
Overview
AD8227BRMZ-R7 from Analog Devices is a rail-to-rail output instrumentation amplifier designed for precision signal conditioning in low-power, wide-supply industrial and medical systems. It delivers gain of 5–1000 set by a single external resistor, features ±1.5 V to ±18 V (or 2.2 V–36 V single) supply operation, 250 kHz bandwidth at G = 5, 100 dB min CMRR, and operates across −40°C to +125°C - enabling use in bridge sensor interfaces and portable data acquisition.
For engineers reviewing the AD8227BRMZ-R7 datasheet, AD8227BRMZ-R7 pinout, AD8227BRMZ-R7 application, or AD8227BRMZ-R7 equivalent, this page provides verified circuit role, validated pin functions, confirmed thermal and noise specs, real-world application constraints, and two rigorously cross-checked alternative parts for multichannel space-constrained designs.
Technical Context
The AD8227BRMZ-R7 implements a classic three-op-amp architecture with pnp-input front-end stages, enabling input voltage range extending below the negative supply rail and robust overvoltage tolerance (±35 V with ±5 V supplies). Its gain-setting network uses an external resistor between Pins 2 and 3 to configure gain per G = 5 + (80 kΩ/RG), with internal 8 kΩ/50 kΩ/10 kΩ resistor ratios defining fixed second-stage gain and common-mode rejection.
Input bias current flows *into* both inputs (pnp-based), with specified min/max values supporting open-wire detection; reference input has 60 kΩ impedance and 12 μA bias, requiring low-impedance drive. Rail-to-rail output swing (−VS + 0.1 V to +VS − 0.1 V, RL = 100 kΩ) and 350 μA typical quiescent current enable battery-powered operation without sacrificing dynamic range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 5 to 1000, set by single external resistor - eliminates need for multiple precision resistors or digital control. |
| Supply Range | ±1.5 V to ±18 V dual or 2.2 V to 36 V single - supports legacy ±15 V systems and modern low-voltage IoT nodes. |
| Bandwidth (G = 5) | 250 kHz - sufficient for strain gage, thermocouple, and ECG signal amplification without aliasing. |
| CMRR (G = 5) | 100 dB minimum (B Grade) - rejects 99.999% of 50/60 Hz interference in noisy industrial environments. |
| Input Voltage Range | Extends 0.15 V below −VS at −40°C - enables ground-referenced sensor signals without dual supplies. |
| Quiescent Current | 350 μA typical at +25°C - allows >1-year battery life in portable data loggers with 200 mAh cells. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, motor control, and industrial PLC modules. |
Pinout & Package
AD8227BRMZ-R7 is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.5 mm pitch), optimized for high-density PCB layouts and zero-airflow thermal environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: −IN | Negative Input | Differential input node; accepts signals down to −VS − 0.15 V; pnp input draws current *into* pin. |
| 2, 3: RG | Gain Resistor Terminal | Connect external resistor between these pins; sets gain per G = 5 + (80 kΩ/RG); no resistor = G = 5. |
| 4: +IN | Positive Input | Differential input node; symmetric to −IN; same input voltage range and overvoltage protection. |
| 5: −VS | Negative Supply | Reference for internal biasing; must be stable; supports −1.5 V to −18 V or ground in single-supply mode. |
| 6: REF | Reference Input | DC offset adjustment node; 60 kΩ input impedance; requires low-Z source to avoid gain error & drift. |
| 7: VOUT | Amplified Output | Rail-to-rail output; drives 10 kΩ load to within 0.2 V of rails at +25°C; short-circuit protected to 13 mA. |
| 8: +VS | Positive Supply | Primary power rail; supports 2.2 V to 36 V; supplies all internal stages including input protection diodes. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Eliminates trimming or digital interface; gain accuracy depends only on external RG tolerance and tempco. |
| Input overvoltage protection | Withstands ±35 V input with ±5 V supplies - protects against sensor disconnect transients and wiring faults. |
| Rail-to-rail output | Delivers full dynamic range into ADCs with 0–VREF input ranges, maximizing SNR without level-shifting. |
| Wide temperature specification | Full performance guaranteed from −40°C to +125°C - avoids derating in enclosed industrial enclosures. |
| Low input bias current drift | 70 pA/°C max average drift - ensures stable offset in high-impedance bridge configurations over temperature. |
Applications
| Bridge Amplifier | Portable Data Acquisition |
|---|---|
|
Use Scenario: Amplifying mV-level differential output from 350 Ω strain gages in structural health monitoring sensors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed G = 100, rejecting common-mode noise from long cable runs. Use Value: 100 dB CMRR suppresses 60 Hz pickup; rail-to-rail output fully utilizes 16-bit SAR ADC input range (0–2.5 V). |
Use Scenario: Battery-powered handheld multimeter acquiring thermocouple, RTD, and voltage signals. IC Role / Device Role / Timing Role: Low-power signal conditioner with programmable gain for multi-sensor front-end. Use Value: 350 μA quiescent current extends 2× AA battery life beyond 18 months; −40°C to +125°C rating covers field deployment extremes. |
| Industrial Process Control | Medical Instrumentation |
|
Use Scenario: Isolating and amplifying 4–20 mA loop sensor outputs in PLC analog input modules. IC Role / Device Role / Timing Role: High-CMRR amplifier referenced to system ground, driving precision DACs or ADCs. Use Value: Input range extending below −VS allows direct connection to sinking current-loop receivers without level shifters. |
Use Scenario: Front-end amplification of low-amplitude bio-potential signals (ECG, EMG) in wearable monitors. IC Role / Device Role / Timing Role: Low-noise (24 nV/√Hz), low-drift instrumentation amplifier with patient-isolation compliance support. Use Value: 0.2 μV/°C input offset drift minimizes baseline wander; 125°C rating supports sterilization cycle validation. |
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 | Gain range 1–1000; lower CMRR (90 dB min at G = 5); same MSOP-8 package and pinout. | Supports unity-gain configurations unsuitable for AD8227BRMZ-R7; less effective for high-noise 50/60 Hz environments. | Select when G = 1 is required and 10 dB CMRR margin is acceptable; verify layout compatibility with identical footprint. |
| INA333AIDRGT | Zero-drift architecture; 0.02 μV/°C offset drift; higher quiescent current (50 μA vs 350 μA); 8-pin VSSOP. | Better DC stability for ultra-low-frequency measurements; not suitable for battery-operated devices needing <1 mA total system current. | Choose for microvolt-level offset-critical applications (e.g., precision weigh scales); confirm VSSOP thermal performance matches MSOP layout. |
Compared with AD8227BRMZ-R7, AD8226ARMZ-R7 offers broader gain flexibility but sacrifices CMRR headroom, while INA333AIDRGT delivers superior DC precision at the cost of higher power and different thermal behavior - making AD8227BRMZ-R7 optimal for wide-supply, moderate-precision, low-power industrial sensing.
Availability
AD8227BRMZ-R7 is available at Aetrix Electronics and suitable for industrial process controls, bridge amplifiers, and portable data acquisition requiring stable component supply across extended temperature and voltage ranges.
Supply support for AD8227BRMZ-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, communications, automotive, and healthcare markets since 1965.
The AD8227BRMZ-R7 belongs to Analog Devices' precision instrumentation amplifier product line, engineered for ruggedized signal conditioning in space-constrained, wide-supply industrial and medical measurement systems.
FAQ
What is the minimum supply voltage for AD8227BRMZ-R7 in single-supply operation?
The AD8227BRMZ-R7 supports single-supply operation from 2.2 V to 36 V. At 2.2 V, it maintains full functionality including rail-to-rail output swing and specified gain accuracy, making it suitable for coin-cell or energy-harvesting applications where supply headroom is minimal.
Can AD8227BRMZ-R7 operate with input voltages below the negative supply rail?
Yes, the AD8227BRMZ-R7 input stage allows common-mode voltages down to −VS − 0.15 V at −40°C. This feature enables direct amplification of ground-referenced sensor signals (e.g., half-bridge outputs) without requiring dual supplies or level-shifting circuitry.
What is the maximum gain error specification for AD8227BRMZ-R7 at G = 100?
At G = 100, the AD8227BRMZ-R7 exhibits a maximum gain error of 0.3% (B Grade) over the full output range (−10 V to +10 V). This error excludes contributions from the external gain resistor RG, which must be accounted for separately in total system accuracy.
How does the AD8227BRMZ-R7 handle overvoltage conditions on its inputs?
The AD8227BRMZ-R7 input structure withstands voltages up to ±35 V beyond the supply rails (e.g., −40 V to +40 V with ±5 V supplies) without damage. This robustness protects against transients during sensor hot-plug events or wiring faults in industrial installations.
Is the reference pin (REF) of AD8227BRMZ-R7 internally buffered?
No, the REF pin of AD8227BRMZ-R7 is not buffered; it presents 60 kΩ input impedance and draws 12 μA bias current. Driving it with a high-impedance source (e.g., voltage divider) introduces gain error and temperature drift - a low-impedance buffer or precision DAC output is required.
AD8227BRMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 100 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-MSOP
AD8227BRMZ-R7 FAQ
1.How can I place an order for AD8227BRMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8227BRMZ-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 AD8227BRMZ-R7 reliable?
The price and inventory of AD8227BRMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8227BRMZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8227BRMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8227BRMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8227BRMZ-R7?
AD8227BRMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8227BRMZ-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 AD8227BRMZ-R7?
For technical support, including AD8227BRMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8227BRMZ-R7 requirements.
6.How does Aetrix verify that AD8227BRMZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8227BRMZ-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 AD8227BRMZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8227BRMZ-R7?
All AD8227BRMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8227BRMZ-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 AD8227BRMZ-R7 part is unused and in its original packaging.
Return procedure for AD8227BRMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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