AD8226ARMZ

Part: AD8226ARZ — Analog Devices

Type: Instrumentation Amplifier (rail-to-rail output)

Description: Wide supply range (2.2–36 V single, ±1.35 to ±18 V dual) instrumentation amplifier with gain set by one external resistor (G = 1 to 1000), 1.5 MHz bandwidth at G = 1 and 350 μA typical supply current.

Operating Conditions:

• Supply voltage: 2.2–36 V single supply; ±1.35 to ±18 V dual supply
• Operating temperature: -40 to +125 °C (specified)
• Gain range: 1 to 1000 V/V, G = 1 + (49.4 kΩ / RG)

Absolute Maximum Ratings:

• Max supply voltage: ±18 V
• Output short-circuit current: indefinite
• Max voltage at -IN or +IN: -VS + 40 V; min: +VS - 40 V
• REF voltage: ±VS
• Storage temperature: -65 to +150 °C
• Max junction temperature: 140 °C
• ESD: HBM 1 kV, CDM 1.5 kV, MM 100 V

Key Specs:

• CMRR (G = 1, VCM = ±10 V, ARZ grade): 86 dB min
• CMRR (G = 10 / 100 / 1000): 106 / 120 / 120 dB min
• Input voltage noise at 1 kHz: 22 nV/√Hz typ, 24 nV/√Hz max
• Input offset VOSI (±5 V to ±15 V supplies, ARZ): 100 μV max
• Input bias current (TA = +25 °C): 5 nA min, 20 nA typ, 27 nA max
• Gain error, G = 1 (ARZ, VOUT ±10 V): 0.015% max
• Small-signal -3 dB bandwidth: 1500 kHz (G = 1), 160 kHz (G = 10), 20 kHz (G = 100), 2 kHz (G = 1000)
• Slew rate: 0.4 V/μs (G = 1), 0.6 V/μs (G = 5 to 100)
• Quiescent current (TA = +25 °C, ±15 V): 350 μA typ, 425 μA max
• Output short-circuit current: 13 mA typ

Features:

• Gain set with one external resistor
• Input voltage range extends below ground
• Inputs protected beyond supplies (input overvoltage range ±40 V relative to the supplies)
• Rail-to-rail output
• Minimum and maximum input bias currents specified for open-wire detection
• Specified for -40 to +125 °C

Applications:

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

Package:

• 8-lead SOIC (ARZ)
• 8-lead MSOP (ARMZ variants)

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

Table 1. Instrumentation Amplifiers by Category 1

AD8226 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open wire detection.

The AD8226 is perfect for multichannel, space-constrained industrial applications. Unlike other low cost, low power instrumentation amplifiers, the AD8226 is designed with a minimum gain of 1 and can easily handle ±10 V signals. With its MSOP package and 125°C temperature rating, the AD8226 thrives in tightly packed, zero airflow designs.

The AD8226 is available in 8-lead MSOP and SOIC packages, and is fully specified for -40°C to +125°C operation.

For a device with a similar package and performance as the AD8226 but with gain settable from 5 to 1000, consider using the AD8227.

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.