Part A
AD8620BRZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 1672 PCS
- Package
- SOIC-8
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Replacement verdict
Compatible functional replacement candidate
The AD8625AR-REEL7 can serve as a functional replacement candidate for the AD8620BRZ in many precision JFET-input signal-conditioning applications, since both are dual, low-noise, low-bias-current op amps with wide supply range and rail-to-rail output. However, the AD8625AR-REEL7 offers lower bandwidth and slew rate and is specified over the industrial temperature range rather than the extended range of the AD8620BRZ, so gain-bandwidth-critical and extended-temperature designs require validation before substitution.
Amplifier Channel Count
High match
Input Bias Current
High match
Gain Bandwidth Product
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD8625AR-REEL7
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 9562 PCS
- Package
- SOIC-14
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8620BRZ | AD8625AR-REEL7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Channel count determines whether the part can drop into a given PCB footprint and support the required signal paths. |
| Input Offset Voltage (max) | 85 µV | 750 µV | Lower offset improves DC precision; a large difference affects accuracy in sensor and instrumentation front ends. |
| Input Bias Current (typ) | 3 pA | 1 pA | Ultra-low bias current is critical for high-impedance sources; both are excellent but differ slightly. |
| Gain Bandwidth Product | 25 MHz | 5 MHz | GBW sets the achievable closed-loop bandwidth and slew performance; a 5x difference limits high-speed applications. |
| Slew Rate | 60 V/µs | 5 V/µs | Slew rate limits large-signal response and distortion; the AD8620 is far faster for dynamic signals. |
| Supply Voltage Range | ±5 V to ±13 V | ±5 V to ±13 V (5 V to 26 V) | Operating supply range must match the system rails; both support similar dual-supply operation. |
| Supply Current per Amplifier (typ) | 3.0 mA | 0.9 mA | Quiescent current affects power budget; the quad AD8625 draws less per amplifier, favoring low-power designs. |
| Input Voltage Noise Density (typ) | 6 nV/√Hz | 16 nV/√Hz | Lower noise density improves SNR in low-level signal amplification; the AD8620 is notably quieter. |
| Package | 8-Lead SOIC | 14-Lead SOIC | Package and pin count must match the board layout; different footprints prevent direct substitution. |
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 | AD8620BRZ | AD8625AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 2 | 4 |
| Output Type | - | Rail-to-Rail |
| Slew Rate | 60V/µs | 5V/µs |
| Gain Bandwidth Product | 25 MHz | 5 MHz |
| Current - Input Bias | 3 pA | 0.25 pA |
| Voltage - Input Offset | 45 µV | 350 µV |
| Supply Current | 3mA (x2 Channels) | 710µA (x4 Channels) |
| Current - Output / Channel | 45 mA | 15 mA |
| Voltage - Supply Span(Min) | 10 V | 5 V |
| Voltage - Supply Span(Max) | 26 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 primary differences between the AD8620BRZ and AD8625AR-REEL7?
The AD8620BRZ is a dual, low-noise, precision JFET-input operational amplifier specified for ±5 V to ±13 V supplies, offered in an 8-lead SOIC package with a B-grade grade. The AD8625AR-REEL7 is a quad, low-power, rail-to-rail output JFET-input op amp specified for +5 V to +26 V (or ±2.5 V to ±13 V) supplies, supplied in a 14-lead SOIC on a 7-inch reel. The key differences are channel count (dual vs. quad), package/pin count (8-lead vs. 14-lead SOIC), and the reel packaging of the AD8625AR-REEL7.
Can the AD8620BRZ be used as a direct drop-in replacement for the AD8625AR-REEL7?
No. The AD8620BRZ is a dual op amp in an 8-lead SOIC, while the AD8625AR-REEL7 is a quad op amp in a 14-lead SOIC. The package footprint, pin count, and pin functions differ, so a direct PCB drop-in replacement is not possible without layout changes and validation against the respective datasheets.
How do the supply voltage ranges of the AD8620BRZ and AD8625AR-REEL7 compare?
The AD8620BRZ is specified for operation from ±5 V to ±13 V dual supplies. The AD8625AR-REEL7 is specified for +5 V to +26 V single supply or ±2.5 V to ±13 V dual supply. Designs operating at low single-supply voltages (below ±5 V dual) favor the AD8625AR-REEL7, while the AD8620BRZ targets higher-voltage bipolar precision applications.
What are the input bias current and noise characteristics of these two amplifiers?
Both are JFET-input amplifiers with very low input bias current, making them suitable for high-impedance sensor interfaces. The AD8620BRZ is characterized as a low-noise precision amplifier, and the AD8625AR-REEL7 is characterized as a low-power JFET-input amplifier. For exact input bias current, voltage noise density, and current noise density values, consult the respective Analog Devices datasheets, as these parameters differ between the two parts.
Which part is better suited for low-power, multi-channel signal conditioning?
The AD8625AR-REEL7 is the quad device and is characterized by low power consumption, making it suitable for multi-channel signal conditioning where four amplifiers are needed in a single package. The AD8620BRZ is a dual precision low-noise amplifier better suited to two-channel high-accuracy front ends. Selection should be based on channel count, supply voltage, and the noise/power budget verified in the datasheets.
Are the AD8620BRZ and AD8625AR-REEL7 available in the same package type?
No. The AD8620BRZ is supplied in an 8-lead SOIC package, while the AD8625AR-REEL7 is supplied in a 14-lead SOIC package on a 7-inch reel. Both are surface-mount SOIC families, but the lead counts and body widths differ, so PCB land patterns are not interchangeable.
What does the "BRZ" suffix on the AD8620BRZ and the "AR-REEL7" suffix on the AD8625AR-REEL7 indicate?
The "BRZ" suffix on the AD8620BRZ denotes the B-grade performance level in a RoHS-compliant SOIC package. The "AR-REEL7" suffix on the AD8625AR-REEL7 denotes the A-grade device in an SOIC package supplied on a 7-inch tape-and-reel. Grade and packaging suffixes should be confirmed against the official Analog Devices ordering guide before production release.
Which applications are each of these amplifiers typically used for?
The AD8620BRZ, as a dual low-noise precision JFET-input op amp, is typically used in high-impedance sensor amplification, precision instrumentation, and audio or measurement front ends requiring low noise. The AD8625AR-REEL7, as a quad low-power JFET-input op amp with rail-to-rail output, is typically used in multi-channel portable instrumentation, active filters, and signal conditioning where low power and four channels per package are advantageous. Final suitability must be verified against the datasheet specifications for the target design.