Part A
AD8620BRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1672 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 AD8620AR-REEL is a functionally compatible alternative to the AD8620BRZ, sharing the same dual low-noise JFET-input op-amp architecture, SOIC-8 footprint, and supply range. The primary distinction is grade: the BRZ offers tighter offset voltage and lower offset drift, so the AR-REEL is best suited to applications where the relaxed DC precision grade remains acceptable.
Amplifier Architecture
High match
Package and Pinout
High match
Supply Voltage Range
High match
Offset Voltage Grade
Validation required
Parts at a glance
Part B
AD8620AR-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5748 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 | AD8620BRZ | AD8620AR-REEL | Why it matters |
|---|---|---|---|
| Grade / Temperature Range | B grade, -40°C to +125°C | A grade, -40°C to +85°C | The B grade is specified over a wider temperature range, making it suitable for harsher environments where the A grade may not be guaranteed. |
| Input Offset Voltage (max) | 100 µV | 250 µV | Lower offset voltage improves DC precision; the B grade offers tighter offset for high-accuracy signal conditioning. |
| Input Offset Voltage Drift (max) | 1 µV/°C | 2 µV/°C | Lower drift maintains accuracy over temperature; the B grade is more stable in precision applications. |
| Input Bias Current (max) | 10 pA | 10 pA | Very low bias current is critical for high-impedance sensor and photodiode front-ends; both grades share this JFET-input advantage. |
| Input Voltage Noise Density | 6 nV/√Hz | 6 nV/√Hz | Low voltage noise determines the achievable signal-to-noise ratio in low-level audio and instrumentation circuits. |
| Gain Bandwidth Product | 25 MHz | 25 MHz | GBW sets the closed-loop bandwidth and settling behavior; identical values mean AC performance is interchangeable. |
| Slew Rate | 60 V/µs | 60 V/µs | Slew rate limits large-signal response and full-power bandwidth; matching values preserve dynamic performance. |
| Supply Voltage Range | ±5 V to ±13 V | ±5 V to ±13 V | The dual-supply operating window determines compatibility with the system power rails; both parts support the same range. |
| Package / Packaging | 8-lead SOIC (tube/tray) | 8-lead SOIC (tape and reel) | Same package footprint allows drop-in substitution; packaging format affects assembly line handling and inventory. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8620BRZ | AD8620AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 2 | 2 |
| Slew Rate | 60V/µs | 60V/µs |
| Gain Bandwidth Product | 25 MHz | 25 MHz |
| Current - Input Bias | 3 pA | 3 pA |
| Voltage - Input Offset | 45 µV | 85 µV |
| Supply Current | 3mA (x2 Channels) | 3mA (x2 Channels) |
| Current - Output / Channel | 45 mA | 45 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 26 V | 26 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 AD8620BRZ and AD8620AR-REEL?
Both are dual, low-noise, precision JFET-input operational amplifiers from Analog Devices in an 8-lead SOIC package. The primary differences are grade and packaging: the AD8620BRZ is a B-grade device with tighter specified limits (e.g., lower offset voltage and drift), supplied in tube form, while the AD8620AR-REEL is an A-grade device supplied on tape and reel for automated assembly. The B-grade typically offers tighter VOS and drift specifications than the A-grade.
Are the AD8620BRZ and AD8620AR-REEL pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pin functions (OUT A, -IN A, +IN A, V-, +IN B, -IN B, OUT B, V+), so they are pin-compatible and share the same PCB land pattern.
Can the AD8620AR-REEL be used as a drop-in replacement for the AD8620BRZ?
They are pin-compatible and functionally similar, but the A-grade has looser guaranteed specifications than the B-grade (for example, offset voltage and drift limits). A substitution should only be made after verifying that the A-grade limits meet the design's error budget and that the tape-and-reel packaging is acceptable for the assembly process.
What supply voltage range do the AD8620BRZ and AD8620AR-REEL support?
Both devices operate from dual supplies of ±5 V to ±13 V (or an equivalent single supply of 10 V to 26 V), per the Analog Devices AD8620 datasheet.
What is the input bias current of these amplifiers?
The AD8620 is a JFET-input op amp with very low input bias current, typically in the low picoampere range at room temperature (on the order of a few pA typical), making it suitable for high-impedance sensor and precision applications. Consult the datasheet for the exact guaranteed limits over temperature.
Why would a designer choose the AD8620BRZ over the AD8620AR-REEL?
The B-grade (AD8620BRZ) is selected when tighter guaranteed offset voltage and drift are required for precision DC accuracy. The A-grade (AD8620AR-REEL) is typically chosen when the application can tolerate the wider A-grade limits and tape-and-reel packaging is preferred for high-volume automated placement.
Are the AD8620BRZ and AD8620AR-REEL RoHS compliant?
Yes. The "Z" suffix in both part numbers denotes RoHS-compliant, lead-free (Pb-free) packaging per Analog Devices' nomenclature, and both are specified for the industrial temperature range of -40 °C to +125 °C.