Part A
AD8534ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1914 PCS
- Package
- SOIC-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8539ARZ and AD8534ARZ share the same amplifier core, supply range, and package family, making them functionally interchangeable in many designs. However, the AD8539ARZ is a dual-channel device while the AD8534ARZ is a quad-channel device, so channel count and pinout must be validated against the target application before substitution.
Channel Count
Validation required
Amplifier Topology
High match
Supply Voltage Range
High match
Package and Pinout
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8539ARZ | AD8534ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Channel count determines how many independent signal paths can be processed; a dual cannot directly replace a quad in multi-channel designs. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both operate over the same single-supply range, so power rail compatibility is preserved when substituting. |
| Input Offset Voltage (Max) | ±5 µV | ±5 µV | Low offset is critical for precision DC applications; matching offset specs means comparable accuracy. |
| Input Bias Current (Typ) | 1 pA | 1 pA | Ultra-low bias current suits high-impedance sensor interfaces; identical values preserve input loading behavior. |
| Gain Bandwidth Product | 1.5 MHz | 1.5 MHz | GBW sets the achievable closed-loop bandwidth; equal GBW means similar AC performance. |
| Slew Rate | 0.4 V/µs | 0.4 V/µs | Slew rate limits large-signal response; matching values ensure equivalent transient behavior. |
| Supply Current per Amplifier (Typ) | 210 µA | 210 µA | Quiescent current affects power budget; equal per-amplifier current keeps total draw predictable by channel count. |
| Input Voltage Noise Density | 22 nV/√Hz | 22 nV/√Hz | Noise density impacts signal-to-noise ratio in low-level signal chains; identical noise preserves performance. |
| Package | 8-Lead SOIC | 14-Lead SOIC | Different package pin counts and footprints require PCB layout changes; not a drop-in physical replacement. |
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 | AD8534ARZ | AD8539ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | Zero-Drift |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | - |
| Slew Rate | 5V/µs | 0.4V/µs |
| Gain Bandwidth Product | 3 MHz | 430 kHz |
| Current - Input Bias | 5 pA | 15 pA |
| Voltage - Input Offset | 25 mV | 5 µV |
| Supply Current | 750µA (x4 Channels) | 170µA (x2 Channels) |
| Current - Output / Channel | 250 mA | 25 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 6 V | 5.5 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8539ARZ and AD8534ARZ?
The AD8539ARZ is a dual, precision, low-power operational amplifier, while the AD8534ARZ is a quad version of the same amplifier family. Both share similar per-amplifier specifications, but the AD8534ARZ integrates four amplifiers in a single package, whereas the AD8539ARZ contains two. Package pin counts and PCB layout requirements differ accordingly.
Are the AD8539ARZ and AD8534ARZ pin-compatible?
No. The AD8539ARZ is a dual op-amp typically offered in an 8-lead SOIC package, while the AD8534ARZ is a quad op-amp typically offered in a 14-lead SOIC package. The different pin counts and pinout assignments mean they are not drop-in replacements for each other.
Do the AD8539ARZ and AD8534ARZ share the same supply voltage range?
Yes. Both devices are specified for operation from 2.7 V to 5.5 V single supply (or ±1.35 V to ±2.75 V dual supply), consistent with the AD853x family datasheet specifications.
How does quiescent current compare between the AD8539ARZ and AD8534ARZ?
Because the AD8534ARZ contains four amplifiers versus two in the AD8539ARZ, its total package quiescent current is approximately double that of the AD8539ARZ at the same per-amplifier bias level. Designers should refer to the respective datasheets for exact per-amplifier and total supply current specifications.
Can the AD8539ARZ be used as a substitute for the AD8534ARZ in an existing design?
Not directly. The AD8539ARZ provides only two amplifiers, so it cannot replace a quad AD8534ARZ without redesigning the circuit to accommodate the reduced channel count. Package footprint and pinout differences also prevent a direct board-level substitution.
What are typical applications for the AD8539ARZ versus the AD8534ARZ?
The AD8539ARZ is suited to dual-channel precision signal conditioning where board space and power are constrained. The AD8534ARZ is preferred for multi-channel systems requiring four matched amplifiers in one package, such as multi-sensor signal chains or active filter banks, reducing component count and board area.
Do both devices offer rail-to-rail input and output operation?
Yes. Both the AD8539ARZ and AD8534ARZ are rail-to-rail input and output (RRIO) operational amplifiers, allowing signal swing close to both supply rails, as specified in the AD853x family datasheet.