Part A
AD8513ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2214 PCS
- Package
- SOIC-14
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8512ARZ and AD8513ARZ are dual and quad low-noise JFET operational amplifiers from the same AD851x family, sharing identical per-channel electrical characteristics, supply range, and SOIC package family. The AD8513ARZ is a functional replacement candidate for the AD8512ARZ only when the additional two channels and the correspondingly larger package footprint are acceptable in the target design.
Channel Count
Not compatible
Package Footprint
Not compatible
Supply Voltage Range
High match
Input Offset Voltage
High match
Parts at a glance
Part B
AD8512ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2506 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8512ARZ | AD8513ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Determines how many independent op-amp channels are available in one package; a dual cannot directly replace a quad in multi-channel designs. |
| Input Offset Voltage (max) | 0.8 mV | 0.8 mV | Low offset voltage ensures accurate DC signal amplification; matching values support equivalent precision performance. |
| Input Bias Current (typ) | 25 pA | 25 pA | Very low bias current (JFET input) minimizes errors in high-impedance and precision applications. |
| Gain Bandwidth Product | 8 MHz | 8 MHz | Defines the frequency range over which the amplifier provides useful gain; identical GBW means comparable AC performance. |
| Slew Rate | 20 V/µs | 20 V/µs | Determines how fast the output can respond to large signal changes; matching slew rates support equivalent transient behavior. |
| Supply Voltage Range | ±4.5 V to ±18 V (dual) | ±4.5 V to ±18 V (dual) | Defines the operating supply window; identical ranges allow the same power supply design to be used. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Low noise density is critical for precision and low-level signal applications; matching values preserve noise performance. |
| Package Type | 8-Lead SOIC | 14-Lead SOIC | Different package pin counts and footprints affect PCB layout and cannot be drop-in substituted without board redesign. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical industrial temperature ranges ensure equivalent environmental robustness. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8513ARZ | AD8512ARZ |
|---|---|---|
| Part Status | Active | Active |
| 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 AD8512ARZ and AD8513ARZ?
The AD8512ARZ is a dual precision JFET-input operational amplifier, while the AD8513ARZ is a quad precision JFET-input operational amplifier. Both are members of the same AD851x family and share identical per-amplifier specifications, but differ in channel count and package: the AD8512ARZ is offered in an 8-lead SOIC package, and the AD8513ARZ is offered in a 14-lead SOIC package.
Are the AD8512ARZ and AD8513ARZ electrically identical on a per-amplifier basis?
Yes. Both devices are built on the same precision JFET-input amplifier core and share the same typical specifications per amplifier, including low offset voltage, low input bias current, low noise, and high open-loop gain. The primary differences are the number of amplifiers per package and the package pinout.
Can the AD8512ARZ be used as a drop-in replacement for the AD8513ARZ?
No. The AD8512ARZ is a dual (8-lead) device and the AD8513ARZ is a quad (14-lead) device, so they are not pin-for-pin or package compatible. A dual cannot directly replace a quad in a quad footprint, and vice versa. Substitution requires a redesign of the PCB layout and verification against the manufacturer datasheet.
What are the supply voltage and input characteristics of these amplifiers?
Both the AD8512ARZ and AD8513ARZ are specified for dual-supply operation (typically ±5 V to ±15 V) and feature JFET inputs with very low input bias current, low input offset voltage, and low voltage noise. Designers should confirm exact limits and test conditions in the official Analog Devices datasheet for the AD8512/AD8513 before finalizing a design.
Which package types are available for the AD8512ARZ and AD8513ARZ?
The AD8512ARZ is supplied in an 8-lead SOIC package, and the AD8513ARZ is supplied in a 14-lead SOIC package. Both are RoHS-compliant "Z" grade SOIC variants. PCB land patterns and thermal considerations differ between the two package sizes.
Are the AD8512ARZ and AD8513ARZ suitable for precision signal conditioning applications?
Yes. The AD851x family is intended for precision analog signal conditioning, including active filters, instrumentation, photodiode amplification, and high-impedance sensor interfaces, due to its low offset, low bias current, and low noise. The dual AD8512ARZ suits two-channel designs, while the quad AD8513ARZ suits higher channel-count designs in a single package.
How should I choose between the AD8512ARZ and AD8513ARZ for a new design?
Choose the AD8512ARZ when the design requires two precision JFET-input amplifiers and an 8-lead SOIC footprint is preferred. Choose the AD8513ARZ when four amplifiers are needed in a single 14-lead SOIC package to save board space and reduce component count. Both share the same per-amplifier performance, so the decision is primarily driven by channel count and package constraints.