My Inquiry
My Account
Analog Devices Inc. AD8226BRZ
- Part No.:
- AD8226BRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8226BRZ.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8226BRZ from Analog Devices is a low-cost, rail-to-rail output instrumentation amplifier with gain set by a single external resistor (1 to 1000), wide supply range (±1.35 V to ±18 V or 2.2 V to 36 V), −40°C to +125°C operation, and 22 nV/√Hz input voltage noise - used in precision bridge sensor signal conditioning for industrial process control.
For engineers reviewing the AD8226BRZ datasheet, AD8226BRZ pinout, AD8226BRZ application, or AD8226BRZ equivalent, this page delivers verified specifications, SOIC-8 package details, real-world use cases in medical instrumentation and portable data acquisition, and validated alternative options for multichannel, space-constrained designs requiring robust input protection and rail-to-rail output swing.
Technical Context
The AD8226BRZ employs a three-op-amp architecture with pnp-input transistors enabling input voltages below the negative supply rail and guaranteed overvoltage tolerance of ±35 V (with ±5 V supplies). Its reference terminal supports level-shifting output without affecting gain accuracy.
Gain is set via external resistor RG between Pins 2 and 3 using G = 1 + (49.4 kΩ / RG); CMRR reaches 120 dB at G = 100/1000 (DC–60 Hz) and remains ≥90 dB up to 5 kHz. Input bias current flows out of both inputs, enabling open-wire detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Single: 2.2 V to 36 V; Dual: ±1.35 V to ±18 V - supports battery-powered and industrial rail systems without level-shifting. |
| Gain Range | 1 to 1000 via single external resistor - enables flexible scaling for mV-level bridge outputs up to ±10 V full-scale signals. |
| Input Voltage Range | Extends 0.1 V below −VS and 0.8 V below +VS at +25°C - allows direct amplification of ground-referenced sensors on single supply. |
| CMRR (G=1) | 90 dB min (DC–60 Hz) - rejects common-mode noise from long sensor leads in noisy factory environments. |
| Bandwidth (G=1) | 1.5 MHz - supports dynamic strain measurements and fast step-response in data acquisition systems. |
| Input Noise | 22 nV/√Hz @ 1 kHz - preserves SNR for low-amplitude thermocouple or RTD signals. |
| Quiescent Current | 350 µA typ @ +25°C - enables always-on monitoring in power-sensitive portable instruments. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial motor control applications. |
Pinout & Package
AD8226BRZ is housed in an 8-lead SOIC package (body size 4.9 mm × 3.9 mm, 1.27 mm pitch), RoHS-compliant and rated for surface-mount reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative input | Inverting input of first-stage differential pair; accepts signals down to −VS − 0.1 V. |
| 2, 3 (RG) | Gain-setting terminals | Connect external resistor between these pins to set gain per G = 1 + (49.4 kΩ / RG). |
| 4 (+IN) | Positive input | Non-inverting input of first-stage differential pair; matched impedance to Pin 1. |
| 5 (−VS) | Negative supply | Reference for internal circuitry; must be connected even in single-supply operation (e.g., tied to GND). |
| 6 (REF) | Reference input | Drives output common-mode level; requires low-impedance source (e.g., DAC or filtered supply). |
| 7 (VOUT) | Amplified output | Rail-to-rail swing (e.g., −VS + 0.2 V to +VS − 0.2 V @ RL = 10 kΩ) enables full ADC utilization. |
| 8 (+VS) | Positive supply | Primary power rail; supports wide voltage range and high PSRR (>100 dB up to 100 kHz). |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Eliminates trimming and reduces BOM count vs. fixed-gain alternatives like AD623. |
| Input overvoltage protection | Withstands ±35 V input with ±5 V supply - prevents damage from ESD or wiring faults in field-deployed sensors. |
| Rail-to-rail output | Delivers >99% of supply rails at 10 kΩ load - maximizes dynamic range into 12-bit+ SAR ADCs. |
| Extended temperature range | Specified from −40°C to +125°C - supports operation in uncooled enclosures near motors or power electronics. |
| Low quiescent current | 350 µA typical - enables multi-channel systems with <1 mA total analog front-end current budget. |
| Input below negative rail | Accepts signals as low as −VS − 0.15 V at −40°C - simplifies single-supply design for ground-referenced bridges. |
Applications
| Industrial Process Control | Bridge Amplifiers |
|---|---|
Use Scenario: Monitoring pressure transducers in chemical plant pipelines with 4–20 mA loop integration and local analog signal conditioning. IC Role / Device Role / Timing Role: Instrumentation amplifier conditioning millivolt-level Wheatstone bridge output while rejecting common-mode noise from 50/60 Hz AC interference. Use Value: 90 dB CMRR ensures stable 12-bit measurement accuracy despite shared grounding and long cable runs. | Use Scenario: Strain-gage-based load cell readout in warehouse weighing scales operating from 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Precision gain stage converting microvolt differential signals to 0–3 V range compatible with microcontroller ADCs. Use Value: Single external resistor (RG) enables field-adjustable gain calibration without PCB redesign. |
| Medical Instrumentation | Portable Data Acquisition |
Use Scenario: Biopotential signal conditioning (ECG, EMG) in battery-powered patient monitors requiring low power and high DC accuracy. IC Role / Device Role / Timing Role: Front-end amplifier with input below ground capability to handle bipolar bio-signals without dual supplies. Use Value: 22 nV/√Hz input noise and 0.5 µV/°C input offset drift preserve diagnostic fidelity across ambient temperature shifts. | Use Scenario: Multi-channel environmental sensor node logging temperature, humidity, and vibration on a single 3.3 V Li-ion supply. IC Role / Device Role / Timing Role: Low-power, rail-to-rail output amplifier driving successive-approximation ADCs in compact PCB layouts. Use Value: 350 µA quiescent current and MSOP/SOIC packaging enable 8-channel analog front-end in <2 cm² board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8227BRZ | Same SOIC-8 package and architecture, but minimum gain = 5 (not 1); higher CMRR (110 dB min @ G=5). | Better for fixed high-gain bridge circuits where unity gain is unnecessary; not suitable for variable-gain or unity-gain buffer use. | Select AD8227BRZ when gain ≥5 suffices and enhanced CMRR is prioritized over flexibility. |
| AD623ARZ | Fixed-gain variants (G=1, 5, 10, 100); no external RG; higher supply current (600 µA); narrower supply range (±2.5 V to ±18 V). | Drop-in replacement for legacy designs; lacks single-resistor programmability and extended low-voltage operation. | Choose AD623ARZ only for cost-sensitive, fixed-gain applications where layout reuse is critical and 2.2 V single-supply operation is not required. |
Compared with AD8226BRZ, AD8227BRZ trades unity-gain flexibility for improved CMRR at G≥5, while AD623ARZ sacrifices programmability and low-voltage capability for simpler implementation in static-gain systems - making AD8226BRZ optimal for adaptable, ultra-low-power, wide-supply industrial sensing.
Availability
AD8226BRZ is available at Aetrix Electronics and suitable for industrial process controls, bridge amplifiers, medical instrumentation, and portable data acquisition requiring stable component supply across extended temperature and voltage ranges.
Supply support for AD8226BRZ 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 since 1965.
The AD8226 belongs to Analog Devices' precision instrumentation amplifier product line, engineered for low-cost, high-reliability signal conditioning in harsh environments with wide supply and temperature requirements.
FAQ
What is the maximum input overvoltage rating for AD8226BRZ?
The AD8226BRZ is guaranteed to withstand input voltages up to ±35 V beyond the supply rails (e.g., −VS + 40 V and +VS − 40 V) across −40°C to +125°C. This protects against transient surges and wiring errors in industrial field installations without external clamping diodes.
Can AD8226BRZ operate from a single 3.3 V supply?
Yes, AD8226BRZ supports single-supply operation from 2.2 V to 36 V. At 3.3 V, it delivers rail-to-rail output swing (e.g., 0.1 V to 3.2 V @ RL = 10 kΩ) and maintains 1.5 MHz bandwidth at G = 1, making it ideal for low-voltage portable instrumentation.
How does the REF pin function in AD8226BRZ?
The REF pin sets the output common-mode voltage independently of gain. Driven by a low-impedance source (e.g., DAC or filtered voltage), it shifts VOUT by +VREF with unity gain - enabling level translation into ADC input ranges without affecting differential gain accuracy or CMRR.
What is the typical input bias current behavior of AD8226BRZ?
AD8226BRZ uses pnp-input transistors, so input bias current flows *out* of both −IN and +IN pins. Typical values are 5–27 nA at +25°C and remain stable across temperature (5–35 nA from −40°C to +125°C), supporting reliable open-wire fault detection in 4-wire sensor configurations.
Is AD8226BRZ pin-compatible with AD8221 or AD620?
No, AD8226BRZ is not pin-compatible with AD8221 or AD620. It uses an 8-lead SOIC package with unique pinout (RG pins at 2/3, REF at 6), whereas AD8221 uses 8-lead SOIC with different pin assignments (REF at 5, no RG pins), and AD620 uses 8-lead DIP/SOIC with gain-set pins at 1/8. PCB layout must be redesigned for substitution.
AD8226BRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 MHz
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 50 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
AD8226BRZ FAQ
1.How can I place an order for AD8226BRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8226BRZ 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 AD8226BRZ reliable?
The price and inventory of AD8226BRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8226BRZ is usually 5 days.
3.What payment methods are accepted for AD8226BRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8226BRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8226BRZ?
AD8226BRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8226BRZ 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 AD8226BRZ?
For technical support, including AD8226BRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8226BRZ requirements.
6.How does Aetrix verify that AD8226BRZ is sourced from the original manufacturer or authorized distributors?
All AD8226BRZ 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 AD8226BRZ meets industry standards.
7.What is the process for return or replacement of AD8226BRZ?
All AD8226BRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8226BRZ, 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 AD8226BRZ part is unused and in its original packaging.
Return procedure for AD8226BRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8226BRZ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
