Part A
AD8227ARMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7701 PCS
- Package
- MSOP-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8227ARMZ and AD8223ARMZ-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 AD8227ARMZ offers a wider gain range and higher bandwidth, while the AD8223ARMZ-RL provides a fixed gain of 5 with lower quiescent current. Designers should validate gain configuration, bandwidth, and supply current requirements against the target application before substituting.
Package Type
High match
Pin Configuration
High match
Gain Range
Validation required
Supply Current
Validation required
Parts at a glance
Part B
AD8223ARMZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5243 PCS
- Package
- TSSOP-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8227ARMZ | AD8223ARMZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 1 | Both are single-channel instrumentation amplifiers, so channel count is functionally equivalent. |
| Gain Range | 1 to 1000 (set by single resistor) | 5 to 1000 (set by single resistor) | AD8227 supports unity gain while AD8223 has a minimum gain of 5, which affects low-gain applications and substitutability. |
| Input Offset Voltage (max) | 200 µV | 250 µV | Lower offset voltage improves DC accuracy; the AD8227 offers slightly better precision. |
| Input Bias Current (max) | 1.5 nA | 2.5 nA | Lower bias current reduces errors in high-impedance sensor interfaces; AD8227 is preferable for such designs. |
| Gain Bandwidth Product | 250 kHz | 200 kHz | Higher bandwidth allows the AD8227 to handle faster signals, affecting dynamic performance in signal conditioning. |
| Supply Voltage Range | ±2.3 V to ±18 V (4.6 V to 36 V) | ±2 V to ±12 V (4 V to 24 V) | The AD8227 tolerates higher supply voltages, making it more flexible for industrial and high-voltage systems. |
| Supply Current per Amplifier (typ) | 350 µA | 300 µA | Lower quiescent current benefits battery-powered designs; AD8223 is slightly more power-efficient. |
| CMRR (min, G=100) | 100 dB | 86 dB | Higher common-mode rejection improves noise immunity in differential measurement; AD8227 is superior here. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the AD8227 suits harsher environments and industrial applications. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Identical package and pinout allow drop-in replacement on the same PCB footprint. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8227ARMZ | AD8223ARMZ-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 | 0.8V/µs | 0.3V/µs |
| -3 dB Bandwidth | 250 kHz | 200 kHz |
| Current - Input Bias | 20 nA | 12 nA |
| Voltage - Input Offset | 200 µV | 250 µV |
| Supply Current | 350µA | 650µA |
| Voltage - Supply Span(Min) | 2.2 V | 3 V |
| Voltage - Supply Span(Max) | 36 V | 24 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Current - Output / Channel | 13 mA | - |
Frequently asked questions
What are the key differences between the AD8227ARMZ and AD8223ARMZ-RL?
The AD8227ARMZ is a wide-supply-range instrumentation amplifier with a supply range of ±2.3 V to ±18 V (4.6 V to 36 V total), a gain range of 5 to 1000 set by a single resistor, and a typical gain error of 0.1% at G=5. The AD8223ARMZ-RL is a lower-power, lower-cost instrumentation amplifier with a supply range of 2.7 V to 12 V (±1.35 V to ±6 V), a fixed gain of 5 to 1000 set by a single resistor, and a lower quiescent current. The AD8227 offers wider supply headroom and higher bandwidth, while the AD8223 targets power-sensitive, lower-voltage designs. Both are offered in an 8-lead MSOP (RMZ) package.
Are the AD8227ARMZ and AD8223ARMZ-RL pin-compatible?
Yes. Both devices are specified in the same 8-lead MSOP (RMZ) package and share the same pinout: -IN, +IN, RG, RG, REF, VOUT, +VS, and -VS. This allows a common PCB footprint, but electrical differences (supply range, quiescent current, bandwidth, and gain error) must be validated before substituting one for the other in an existing design.
What supply voltage ranges do these two amplifiers support?
The AD8227ARMZ operates from a total supply of 4.6 V to 36 V (±2.3 V to ±18 V), making it suitable for higher-voltage industrial and ±15 V systems. The AD8223ARMZ-RL operates from a total supply of 2.7 V to 12 V (±1.35 V to ±6 V), targeting lower-voltage, battery-powered, and single-supply applications. A design requiring more than 12 V total supply cannot use the AD8223ARMZ-RL.
How is gain set on the AD8227ARMZ and AD8223ARMZ-RL?
Both devices use a single external resistor (RG) connected between the two RG pins to set gain from 5 to 1000. The gain equation for both is G = 1 + (49.4 kΩ / RG). Because the internal resistor value is the same, the same RG value produces the same nominal gain on either part, though gain accuracy and drift specifications differ between the two datasheets.
Which part is better for low-power or battery-operated designs?
The AD8223ARMZ-RL is the lower-power option. Its quiescent current is specified at a lower typical value than the AD8227ARMZ, and its 2.7 V minimum supply supports low-voltage single-supply rails. The AD8227ARMZ draws more supply current but provides wider supply range and higher bandwidth, so it is preferred when headroom and AC performance matter more than power consumption.
How do the bandwidth and noise specifications compare?
The AD8227ARMZ provides higher bandwidth (approximately 800 kHz at G=1, rolling off with gain) than the AD8223ARMZ-RL, which has a lower bandwidth specification suited to lower-frequency signal conditioning. Input voltage noise also differs between the two datasheets, with the AD8227 generally specified at a lower noise density. Designers should consult the respective manufacturer datasheets for exact bandwidth-versus-gain and noise-versus-frequency curves before selecting a part for AC-critical signal chains.
Can the AD8223ARMZ-RL directly replace the AD8227ARMZ in an existing ±15 V design?
No. The AD8223ARMZ-RL has a maximum total supply of 12 V, so it cannot be used on ±15 V rails (30 V total). In such a design the AD8227ARMZ must be retained, or the supply must be reduced to within the AD8223's 2.7 V to 12 V range and all performance parameters re-validated.
What does the "-RL" suffix on AD8223ARMZ-RL indicate?
The "-RL" suffix denotes tape-and-reel packaging for automated assembly. The AD8223ARMZ-RL is the same AD8223 die in the 8-lead MSOP (RMZ) package, supplied on reels, whereas the AD8227ARMZ is typically ordered in tube or standard reel quantities depending on the distributor. Electrical performance is defined by the device datasheet, not by the packaging suffix.