Part A
AD8226ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5044 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8226ARMZ and AD8227ARMZ-RL are both single-channel instrumentation amplifiers in the same 8-lead MSOP package with identical pinout, making them a viable functional replacement candidate. However, the AD8227 offers a wider supply range and higher gain bandwidth while drawing more supply current, so the designer must validate supply headroom, power budget, and dynamic performance against the target application before substituting one for the other.
Package and Pinout
High match
Supply Voltage Range
Validation required
Gain Bandwidth Product
Validation required
Supply Current
Validation required
Parts at a glance
Part B
AD8227ARMZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3231 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8226ARMZ | AD8227ARMZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 1 | Both are single-channel instrumentation amplifiers, so channel count is functionally equivalent. |
| Supply Voltage Range | 2.2 V to 36 V (±1.1 V to ±18 V) | 2.7 V to 36 V (±1.35 V to ±18 V) | The AD8226 supports a slightly lower minimum supply, which matters for low-voltage single-supply designs. |
| Input Offset Voltage (max) | ±150 µV (B grade) | ±200 µV | Lower offset improves DC accuracy in precision signal-conditioning applications. |
| Input Bias Current (max) | ±27 nA | ±27 nA | Bias current affects error when driven from high-impedance sources; both are comparable here. |
| Gain Bandwidth Product | 1.5 MHz (G = 1) | 1.5 MHz (G = 1) | Bandwidth determines the maximum signal frequency the amplifier can handle at a given gain. |
| Input Voltage Noise (1 kHz) | 22 nV/√Hz | 22 nV/√Hz | Noise floor impacts resolution in low-level sensor measurement; identical here. |
| CMRR (min, G = 100) | 100 dB | 100 dB | Common-mode rejection determines how well the amplifier rejects interference on input lines. |
| Operating Temperature Range | −40 °C to +125 °C | −40 °C to +125 °C | Industrial temperature range ensures reliable operation in harsh environments. |
| Package / Mounting | 8-Lead MSOP (surface mount) | 8-Lead MSOP (surface mount, tape and reel) | Same footprint allows drop-in replacement; the -RL suffix indicates tape-and-reel packaging for automated assembly. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8226ARMZ | AD8227ARMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.6V/µs | 0.8V/µs |
| -3 dB Bandwidth | 1.5 MHz | 250 kHz |
| Current - Input Bias | 20 nA | 20 nA |
| Voltage - Input Offset | 100 µV | 200 µV |
| Supply Current | 350µA | 350µA |
| Current - Output / Channel | 13 mA | 13 mA |
| Voltage - Supply Span(Min) | 2.2 V | 2.2 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8226ARMZ and AD8227ARMZ-RL?
Both are single-channel instrumentation amplifiers in 8-lead MSOP (RMZ) packages from Analog Devices. The AD8226ARMZ is specified with a gain range of 1 to 1000 and is characterized for supply voltages from ±2.25 V to ±18 V (4.5 V to 36 V total). The AD8227ARMZ-RL is a reduced-cost variant with a fixed gain range of 5 to 1000, specified over a supply range of ±2.25 V to ±18 V, and is supplied in tape-and-reel packaging (RL suffix). The AD8227 cannot be set to gains below 5, whereas the AD8226 supports unity gain.
Are the AD8226ARMZ and AD8227ARMZ-RL pin-compatible?
Yes. Both devices use the standard 8-lead MSOP pinout for instrumentation amplifiers: pin 1 and pin 8 are the gain-setting resistor terminals (RG), pins 2 and 3 are the inverting and non-inverting inputs, pin 4 is the negative supply, pin 5 is the reference, pin 6 is the output, and pin 7 is the positive supply. This pinout compatibility allows the AD8227ARMZ-RL to be placed on a board designed for the AD8226ARMZ, provided the gain range and performance differences are acceptable.
Can the AD8227ARMZ-RL be used as a direct drop-in replacement for the AD8226ARMZ?
Not universally. Because the AD8227 has a minimum gain of 5, it cannot replace the AD8226 in circuits requiring gain settings of 1 to 4. Additionally, the AD8227 has different input offset voltage, noise, and bandwidth specifications than the AD8226. A direct substitution is only valid when the design operates at a gain of 5 or higher and the AD8227's verified datasheet parameters meet the circuit's accuracy and bandwidth requirements.
What is the gain-setting method for both devices?
Both the AD8226ARMZ and AD8227ARMZ-RL set gain using a single external resistor connected between the RG pins (pins 1 and 8). For the AD8226, the gain equation is G = 1 + (49.4 kΩ / RG), allowing gains from 1 to 1000. For the AD8227, the gain equation is G = 5 + (80 kΩ / RG), giving a minimum gain of 5 and a maximum gain of 1000. The resistor value must be selected according to the respective datasheet equation for each part.
How do the supply voltage requirements compare?
Both devices are specified for dual-supply operation from ±2.25 V to ±18 V, corresponding to a total supply voltage of 4.5 V to 36 V. They also support single-supply operation within the same total voltage range. The supply voltage range is therefore equivalent between the AD8226ARMZ and AD8227ARMZ-RL, and both are suitable for battery-powered and industrial signal-conditioning applications within that range.
What package and packaging options distinguish the AD8226ARMZ from the AD8227ARMZ-RL?
Both parts are offered in the 8-lead MSOP package, indicated by the RMZ suffix. The AD8226ARMZ is supplied in standard tube or tray packaging, while the AD8227ARMZ-RL suffix indicates tape-and-reel packaging intended for automated assembly. The package footprint and pinout are identical; only the delivery format differs.
Which device should be selected for a design requiring unity gain?
The AD8226ARMZ must be selected for unity-gain applications, because its gain range extends down to 1. The AD8227ARMZ-RL has a minimum gain of 5 and cannot be configured for unity gain. For any circuit requiring a gain of 1 to 4, only the AD8226ARMZ is applicable within this pair.
Do both devices share the same operating temperature range?
Yes. Both the AD8226ARMZ and AD8227ARMZ-RL are specified for the industrial temperature range of −40 °C to +125 °C, as stated in their respective Analog Devices datasheets. This makes both devices suitable for industrial and automotive-adjacent signal-conditioning environments within that range.