Part A
AD8539ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2904 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8539ARZ and AD8532AR-REEL7 are both dual-channel operational amplifiers from Analog Devices, but they differ in supply voltage range, quiescent current, and input bias current characteristics. The AD8539ARZ is a micropower, low-offset amplifier suited to battery-powered precision applications, while the AD8532AR-REEL7 offers higher output drive and wider supply headroom for general-purpose signal conditioning. Designers should validate supply rails, load conditions, and bias-current-sensitive circuitry before substituting one for the other.
Supply Voltage Range
Validation required
Quiescent Current
Validation required
Channel Count
High match
Input Bias Current
Validation required
Parts at a glance
Part B
AD8532AR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5525 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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 | AD8532AR-REEL7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 2 (Dual) | Both are dual op-amps, so channel count is compatible for substitution. |
| Input Offset Voltage (Max) | 5 µV | 25 mV | AD8539 is a precision zero-drift amplifier with far lower offset, critical for DC accuracy; AD8532 has much larger offset. |
| Input Bias Current (Typ) | 1 pA | 50 pA | Lower bias current reduces errors in high-impedance sensor and transimpedance applications. |
| Gain Bandwidth Product | 1.5 MHz | 3 MHz | AD8532 offers higher bandwidth, affecting achievable closed-loop speed and stability. |
| Slew Rate | 0.4 V/µs | 5 V/µs | AD8532 slews much faster, important for large-signal and transient response performance. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 6 V | Slightly wider upper supply limit on AD8532 allows operation closer to 6 V rails. |
| Quiescent Current per Amplifier (Typ) | 210 µA | 750 µA | AD8539 draws significantly less supply current, important for battery-powered designs. |
| Input Voltage Noise Density (1 kHz) | 50 nV/√Hz | 45 nV/√Hz | Noise density affects signal-to-noise ratio in low-level signal amplification. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | AD8539 supports higher ambient temperatures, relevant for industrial and automotive environments. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pinout allow direct board-level drop-in 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 | AD8539ARZ | AD8532AR-REEL7 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Zero-Drift | General Purpose |
| Number of Circuits | 2 | 2 |
| Output Type | - | Rail-to-Rail |
| Slew Rate | 0.4V/µs | 5V/µs |
| Gain Bandwidth Product | 430 kHz | 3 MHz |
| Current - Input Bias | 15 pA | 5 pA |
| Voltage - Input Offset | 5 µV | 25 mV |
| Supply Current | 170µA (x2 Channels) | 750µA (x2 Channels) |
| Current - Output / Channel | 25 mA | 250 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 V | 6 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8539ARZ and AD8532AR-REEL7?
The AD8539ARZ is a dual, low-power, precision operational amplifier with a maximum offset voltage of 50 µV and a typical supply current of 215 µA per amplifier, supplied in an 8-lead SOIC package. The AD8532AR-REEL7 is a dual, high-output-current, rail-to-rail operational amplifier capable of driving 250 mA, supplied in an 8-lead SOIC package on a 7-inch reel. The AD8539ARZ targets precision, low-power signal conditioning, while the AD8532AR-REEL7 targets high-current drive applications.
Are the AD8539ARZ and AD8532AR-REEL7 pin-compatible?
Both devices are dual operational amplifiers offered in an 8-lead SOIC package with the standard dual op-amp pinout (1: OUT A, 2: −IN A, 3: +IN A, 4: V−, 5: +IN B, 6: −IN B, 7: OUT B, 8: V+). This common pinout allows them to occupy the same PCB land pattern, but electrical differences must be validated before substitution.
How do the supply current and output drive capabilities compare?
The AD8539ARZ is a micropower precision amplifier with a typical supply current of 215 µA per amplifier and a low output current capability. The AD8532AR-REEL7 is specified to deliver up to 250 mA of output current per amplifier, making it suitable for driving heavy loads, at the cost of higher quiescent supply current.
What are the supply voltage ranges for these two amplifiers?
The AD8539ARZ operates from a single supply of 2.7 V to 5.5 V (or dual supplies of ±1.35 V to ±2.75 V). The AD8532AR-REEL7 operates from a single supply of 2.7 V to 6 V (or dual supplies of ±1.35 V to ±3 V). Designs operating near the upper supply limit should account for this difference.
Which device is better suited for precision DC signal conditioning?
The AD8539ARZ is the better choice for precision DC applications. It offers a maximum input offset voltage of 50 µV, low offset drift, and low input bias current, whereas the AD8532AR-REEL7 is optimized for high output current and rail-to-rail swing rather than precision offset performance.
Do both amplifiers support rail-to-rail input and output operation?
The AD8532AR-REEL7 features rail-to-rail input and output operation, allowing signals to swing to both supply rails. The AD8539ARZ is a precision amplifier whose input and output swing specifications should be verified against the manufacturer datasheet for the specific operating conditions of the design.
What packaging and ordering differences exist between the two parts?
The AD8539ARZ is supplied in an 8-lead SOIC package in tube or standard reel quantities. The AD8532AR-REEL7 is specifically supplied in an 8-lead SOIC package on a 7-inch tape-and-reel, which is intended for automated high-volume assembly. Both share the same SOIC body and pinout.
Can the AD8532AR-REEL7 be used as a drop-in replacement for the AD8539ARZ?
Because both are dual op-amps in the same 8-lead SOIC pinout, the AD8532AR-REEL7 can physically fit the same land pattern. However, it is not a direct electrical replacement: the AD8532AR-REEL7 has higher supply current, different offset voltage and drift characteristics, and a different supply voltage range. The substitution must be validated against the target design requirements using the manufacturer datasheets.