Part A
AD8622ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3980 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8622ARZ and AD8627AR-REEL are both dual, precision, low-power operational amplifiers from Analog Devices in the same 8-lead SOIC package, sharing a common supply range and rail-to-rail output architecture. While the AD8622ARZ offers lower input bias current and lower voltage noise, the AD8627AR-REEL provides higher gain bandwidth and faster slew rate. The two parts are functionally interchangeable in many precision signal-conditioning applications, but designers should validate AC performance and input bias current requirements against the specific circuit before substituting.
Amplifier Configuration
High match
Package Type
High match
Gain Bandwidth Product
Validation required
Input Bias Current
Validation required
Parts at a glance
Part B
AD8627AR-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 9523 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8622ARZ | AD8627AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines whether the part can replace a single or dual op-amp in a given circuit layout; they are not directly interchangeable. |
| Input Offset Voltage (Max) | 50 µV | 250 µV | Lower offset voltage improves DC precision; the dual AD8622 is significantly more precise than the single AD8627. |
| Input Bias Current (Typ) | 45 pA | 0.25 pA | Bias current affects error in high-impedance circuits; the AD8627 has lower bias current, favoring high-impedance sensor applications. |
| Gain Bandwidth Product | 560 kHz | 5 MHz | GBW sets the achievable closed-loop bandwidth; the AD8627 supports much higher-frequency signals than the AD8622. |
| Slew Rate | 0.48 V/µs | 5 V/µs | Slew rate limits large-signal response speed; the AD8627 handles faster transients and higher-frequency large signals. |
| Supply Current per Amplifier (Typ) | 215 µA | 800 µA | Quiescent current drives power budget; the AD8622 is a lower-power choice per amplifier for battery-powered designs. |
| Input Voltage Noise Density (Typ) | 11 nV/√Hz | 16 nV/√Hz | Lower noise density improves signal-to-noise ratio in low-level signal chains; the AD8622 offers better noise performance. |
| Supply Voltage Range | ±2.5 V to ±15 V (5 V to 30 V) | ±2.5 V to ±15 V (5 V to 30 V) | Matching supply ranges mean both parts can operate in the same power rails, easing substitution in the supply domain. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure both parts meet the same environmental requirements for industrial-grade applications. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package footprint allows board-level drop-in placement, though pinout and channel count differ functionally. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8622ARZ | AD8627AR-REEL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | J-FET |
| Number of Circuits | 2 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.48V/µs | 5V/µs |
| Gain Bandwidth Product | 560 kHz | 5 MHz |
| Current - Input Bias | 45 pA | 0.25 pA |
| Voltage - Input Offset | 10 µV | 350 µV |
| Supply Current | 215µA (x2 Channels) | 710µA |
| Current - Output / Channel | 40 mA | 15 mA |
| Voltage - Supply Span(Min) | 5 V | 5 V |
| Voltage - Supply Span(Max) | 30 V | 26 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8622ARZ and AD8627AR-REEL?
The AD8622ARZ is a dual, low-power, precision operational amplifier in an 8-lead SOIC package, while the AD8627AR-REEL is a single, low-power, precision JFET-input operational amplifier in an 8-lead SOIC package supplied on tape and reel. The AD8622ARZ provides two amplifiers per package, whereas the AD8627AR-REEL provides one amplifier per package.
Are the AD8622ARZ and AD8627AR-REEL pin-compatible?
No. The AD8622ARZ is a dual op amp with both amplifiers' inputs and outputs assigned across the 8-lead SOIC pinout, while the AD8627AR-REEL is a single op amp with a different pin function assignment on the same 8-lead SOIC footprint. They cannot be interchanged without verifying the pinout against the respective datasheets.
What is the input bias current characteristic of each device?
The AD8627AR-REEL uses a JFET input stage, which provides very low input bias current suitable for high-impedance sensor interfaces. The AD8622ARZ uses a precision bipolar input stage with low offset voltage and low drift. Designers should consult the respective manufacturer datasheets for the exact specified input bias current limits over temperature.
Which device is better suited for multi-channel signal conditioning?
The AD8622ARZ is better suited for multi-channel signal conditioning because it integrates two precision amplifiers in a single 8-lead SOIC package, reducing board space and component count. The AD8627AR-REEL contains a single amplifier and would require two packages for a two-channel implementation.
How does the packaging differ between the AD8622ARZ and AD8627AR-REEL?
Both devices are offered in an 8-lead SOIC package. The AD8622ARZ suffix indicates the standard tube or tray packaging option, while the AD8627AR-REEL suffix indicates tape-and-reel packaging intended for automated high-volume assembly. The reel quantity should be confirmed from the manufacturer's ordering guide.
Can the AD8627AR-REEL be used as a drop-in replacement for one channel of the AD8622ARZ?
No, not as a drop-in replacement. Although both are 8-lead SOIC precision amplifiers, the pinouts differ between the single AD8627AR-REEL and each channel of the dual AD8622ARZ. A redesign of the PCB layout and verification against both datasheets is required before substitution.
What supply voltage range do these amplifiers support?
Both the AD8622ARZ and AD8627AR-REEL are specified for operation on dual supplies typically ranging from ±2.5 V to ±15 V (or equivalent single-supply rails), supporting both battery-powered and industrial signal-chain applications. Exact minimum and maximum supply limits and associated performance specifications should be verified in the official manufacturer datasheets.