Part A
AD8539ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2904 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 AD8539ARZ and AD8532AR-REEL are both dual 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-voltage CMOS amplifier optimized for battery-powered applications, while the AD8532AR-REEL is a higher-current, wider-supply CMOS amplifier with greater output drive capability. Designers should verify supply voltage headroom, load driving requirements, and power budget before substituting one for the other in a given circuit.
Supply Voltage Range
Validation required
Quiescent Current
Validation required
Output Drive Capability
Validation required
Package Type
High match
Parts at a glance
Part B
AD8532AR-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 9796 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 | AD8539ARZ | AD8532AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for direct substitution in dual-amplifier circuits. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 6.0 V | The slightly wider upper supply limit of the AD8532 allows operation closer to 6 V, which can matter in 5 V systems with tolerance headroom. |
| Input Offset Voltage (max) | ±5 µV (typical for zero-drift family) | ±10 mV | The AD8539 is a precision zero-drift amplifier with far lower offset, critical for DC accuracy and low-drift signal chains; the AD8532 is a general-purpose part. |
| Input Bias Current | Very low (picoamp range, CMOS input) | ~1 pA (CMOS input) | Low input bias current minimizes errors in high-impedance sensor and transimpedance applications. |
| Gain Bandwidth Product | ~1.5 MHz | ~3 MHz | The AD8532 offers roughly double the bandwidth, affecting achievable closed-loop gain and signal frequency response. |
| Slew Rate | ~0.4 V/µs | ~5 V/µs | The AD8532 slews much faster, which matters for large-signal transient response and higher-frequency waveforms. |
| Quiescent Supply Current (per amplifier) | ~0.5 mA | ~1.5 mA | Lower quiescent current in the AD8539 benefits battery-powered and power-sensitive designs. |
| Input Voltage Noise Density | ~22 nV/√Hz | ~45 nV/√Hz | Lower noise density in the AD8539 improves signal-to-noise ratio in low-level signal amplification. |
| Operating Temperature Range | −40 °C to +125 °C | −40 °C to +85 °C | The wider temperature range of the AD8539 supports harsher environments and industrial applications. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pinout enable drop-in board-level substitution without layout changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8539ARZ | AD8532AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,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 primary differences between the AD8539ARZ and AD8532AR-REEL?
The AD8539ARZ is a dual, precision, low-power operational amplifier with very low offset voltage and drift, supplied in an 8-lead SOIC package. The AD8532AR-REEL is a dual, high-output-current, rail-to-rail operational amplifier supplied in an 8-lead SOIC package on a 13-inch reel. The AD8539ARZ targets precision DC applications, while the AD8532AR-REEL targets applications requiring high output drive current.
Are the AD8539ARZ and AD8532AR-REEL 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+). They are pin-compatible in that package, but electrical differences must be evaluated before substitution.
How do the supply voltage ranges of the AD8539ARZ and AD8532AR-REEL compare?
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-REEL operates from a single supply of 2.7 V to 6 V (or dual supplies of ±1.35 V to ±3 V). The AD8532AR-REEL therefore supports a slightly higher maximum supply voltage.
Which device is better suited for precision DC signal conditioning?
The AD8539ARZ is the better choice for precision DC signal conditioning. It is specified with very low offset voltage and low offset voltage drift, making it suitable for high-gain, low-frequency sensor and instrumentation signal chains. The AD8532AR-REEL is optimized for high output current drive rather than precision DC offset performance.
Which device provides higher output current drive?
The AD8532AR-REEL provides higher output current drive. It is specified for high output current capability, making it suitable for driving heavy loads such as headphones or small actuators. The AD8539ARZ is a low-power precision amplifier and is not intended for high output current applications.
How do the quiescent supply currents of the AD8539ARZ and AD8532AR-REEL compare?
The AD8539ARZ is a low-power amplifier with a typical quiescent supply current of approximately 1 mA per amplifier. The AD8532AR-REEL draws a higher quiescent supply current, typically around 1.5 mA per amplifier, reflecting its higher output drive capability. Designers should verify exact limits against the respective manufacturer datasheets.
Can the AD8532AR-REEL be used as a drop-in replacement for the AD8539ARZ in precision circuits?
Not without evaluation. Although both are dual op-amps in an 8-lead SOIC package, the AD8532AR-REEL has higher offset voltage and offset drift than the AD8539ARZ, so it may degrade precision DC performance. The AD8532AR-REEL should only be substituted after verifying offset, drift, supply range, and load drive requirements against the target design.
What packaging and ordering differences exist between the AD8539ARZ and AD8532AR-REEL?
The AD8539ARZ is supplied in an 8-lead SOIC package in tube or standard reel quantities depending on the ordering code. The AD8532AR-REEL is specifically supplied on a 13-inch tape-and-reel for high-volume automated assembly. Both use the same 8-lead SOIC body, but the reel packaging and order quantity differ.