Part: AD8226 — Analog Devices

Type: Instrumentation Amplifier

Description: The AD8226 is a low cost, wide supply range instrumentation amplifier that requires one external resistor to set any gain between 1 and 1000. It features rail-to-rail output, robust inputs protected beyond supplies, and operates on single supplies from 2.2 V to 36 V or dual supplies from ±1.35 V to ±18 V.

Operating Conditions:

• Supply voltage: 2.2 V to 36 V (single supply), ±1.35 V to ±18 V (dual supplies)
• Operating temperature: -40°C to +125°C
• Gain range: 1 to 1000

Absolute Maximum Ratings:

• Max supply voltage: ±18 V
• Max continuous current: Indefinite (Output Short-Circuit)
• Max junction temperature: 140 °C

Key Specs:

• Input Voltage Noise (1 kHz): 22 nV/√Hz (Typ)
• CMRR (G=1, BR models): 90 dB (Min, VCM = -10 V to +10 V)
• Small-Signal -3 dB Bandwidth (G=1): 1.5 MHz (Typ)
• Input Offset Voltage (VOSI, BR models): 50 µV (Max, VS = ±5 V to ±15 V)
• Input Bias Current (TA = +25°C): 20 nA (Typ)
• Quiescent Current (TA = +25°C, dual supply): 350 μA (Typ)
• Slew Rate (G=1): 0.4 V/µs (Typ)
• Gain Error (G=1, BR models): 0.01% (Max, VOUT ±10 V)

Features:

• Gain set with 1 external resistor
• Gain range: 1 to 1000
• Input voltage goes below ground
• Inputs protected beyond supplies
• Rail-to-rail output

Applications:

• Industrial process controls
• Bridge amplifiers
• Medical instrumentation

Package:

• 8-lead SOIC
• 8-lead MSOP

Gain set with 1 external resistor

Gain range: 1 to 1000 Input voltage goes below ground Inputs protected beyond supplies Very wide power supply range

Single supply: 2.2 V to 36 V

Dual supplies: ±1.35 V to ±18 V

Bandwidth (G = 1): 1.5 MHz

CMRR (G = 1): 90 dB minimum for BR models

Input noise: 22 nV/√Hz

Typical supply current: 350 μA Specified temperature: -40°C to +125°C 8-lead SOIC and MSOP packages

Industrial process controls Bridge amplifiers Medical instrumentation Portable data acquisition Multichannel systems

AD8226ARMZ Pinout

Package: 8-lead MSOP

Notes

• Pins 2 and 3 are both labeled RG and form the gain-setting resistor network; they are the two terminals of the external gain resistor connection.
• The AD8226 is a low-power instrumentation amplifier with minimum gain of 1, designed for industrial applications with space constraints.
• The device is rated for –40°C to +125°C operation and can withstand input voltages beyond the supply rails (e.g., ±35 V input with ±5 V supplies).

Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability.