Part A
AD8513ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2214 個数
- Package
- SOIC-14
- 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 AD8513ARZ and AD8512AR-REEL7 are both quad and dual low-noise JFET operational amplifiers from the same AD851x family, sharing identical process technology, supply range, and electrical characteristics per channel. The AD8513ARZ offers four channels in a 14-lead SOIC package, while the AD8512AR-REEL7 provides two channels in an 8-lead SOIC package supplied on tape and reel. They are functionally interchangeable at the channel level, but the difference in channel count and package footprint means the AD8512AR-REEL7 cannot directly replace the AD8513ARZ in a board layout designed for four channels, and vice versa. Designers should confirm channel count and PCB footprint requirements before substitution.
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Input Noise Density
High match
Parts at a glance
Part B
AD8512AR-REEL7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3629 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 | AD8513ARZ | AD8512AR-REEL7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines package pinout and PCB layout; a quad and a dual are not drop-in substitutes. |
| Input Offset Voltage (max) | 0.8 mV | 0.8 mV | Offset voltage affects DC accuracy; matching values indicate comparable precision in signal chains. |
| Input Bias Current (typ) | 25 pA | 25 pA | Low bias current is critical for high-impedance sensor and photodiode front-ends; identical values support similar performance. |
| Gain Bandwidth Product | 8 MHz | 8 MHz | GBW sets the achievable closed-loop bandwidth and settling behavior; equal values mean comparable AC response. |
| Slew Rate | 20 V/µs | 20 V/µs | Slew rate limits large-signal response and distortion; matching values indicate similar dynamic performance. |
| Supply Voltage Range | ±4.5 V to ±18 V (dual) | ±4.5 V to ±18 V (dual) | Supply range determines compatibility with the system power rails; identical ranges allow the same supply design. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Noise density governs the noise floor in low-level signal amplification; equal values support similar SNR. |
| Package / Mounting | 14-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Different package pin counts require different footprints, so the parts are not physically interchangeable. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the quad part suits harsher environments; the dual part is limited to industrial range. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8513ARZ | AD8512AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 4 | 2 |
| Slew Rate | 20V/µs | 20V/µs |
| Gain Bandwidth Product | 8 MHz | 8 MHz |
| Current - Input Bias | 25 pA | 25 pA |
| Voltage - Input Offset | 100 µV | 100 µV |
| Supply Current | 2.2mA (x4 Channels) | 2.2mA (x2 Channels) |
| Current - Output / Channel | 70 mA | 70 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 30 V | 30 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 AD8513ARZ and AD8512AR-REEL7?
The AD8513ARZ is a quad (four-channel) precision JFET-input operational amplifier in a 14-lead SOIC package, while the AD8512AR-REEL7 is a dual (two-channel) version of the same amplifier family supplied in a 7-inch tape-and-reel format for automated assembly. Both share the same core JFET-input architecture, but differ in channel count, package pinout, and packaging format.
Are the AD8513ARZ and AD8512AR-REEL7 electrically identical per channel?
Yes. Both devices belong to the same AD851x JFET-input op-amp family and share the same per-channel specifications, including low input bias current, low offset voltage, and low noise. The primary differences are the number of integrated channels and the package/packaging configuration, not the per-amplifier electrical performance.
Can the AD8512AR-REEL7 be used as a drop-in replacement for the AD8513ARZ?
No. The AD8513ARZ is a quad device in a 14-lead SOIC package, whereas the AD8512AR-REEL7 is a dual device in an 8-lead SOIC package. The pin counts, pin functions, and PCB land patterns differ, so a direct drop-in substitution is not possible without redesigning the board layout and accounting for the reduced channel count.
What package types do the AD8513ARZ and AD8512AR-REEL7 use?
The AD8513ARZ is supplied in a 14-lead SOIC (R-14) package. The AD8512AR-REEL7 is supplied in an 8-lead SOIC (R-8) package, delivered on a 7-inch tape-and-reel. Both are surface-mount SOIC packages, but with different lead counts and body widths.
Why is the AD8512AR-REEL7 supplied in tape-and-reel while the AD8513ARZ is not specified as such?
The "-REEL7" suffix on the AD8512AR-REEL7 indicates a 7-inch tape-and-reel packaging format intended for high-volume automated pick-and-place assembly. The AD8513ARZ designation refers to the tube or standard packaging option for the quad device; the reel option for the quad would carry a different orderable suffix. Packaging format affects handling and assembly, not the electrical specifications.
Do both parts share the same JFET-input characteristics?
Yes. Both the AD8513ARZ and AD8512AR-REEL7 are JFET-input operational amplifiers, providing very low input bias current and high input impedance, which makes them suitable for high-impedance sensor interfaces and precision signal conditioning. The JFET input stage is common to the AD851x family.
Which part should be selected for a design requiring four independent amplifier channels?
The AD8513ARZ should be selected, as it integrates four independent JFET-input op-amps in a single 14-lead SOIC package. Using the dual AD8512AR-REEL7 would require two devices and additional board area to achieve the same channel count.
Are both devices suitable for precision low-noise signal conditioning?
Yes. Both the AD8513ARZ and AD8512AR-REEL7 belong to the same precision JFET-input op-amp family, offering low offset voltage, low noise, and low input bias current. Selection between them is driven primarily by channel count, package size, and assembly packaging format rather than by differences in signal-conditioning performance.