Part A
ADA4522-4ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6486 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
Not a drop-in replacement
The ADA4522-4ARZ and ADA4530-1ARZ-RL are not functionally interchangeable: the ADA4522-4ARZ is a quad-channel, wide-supply zero-drift amplifier, while the ADA4530-1ARZ-RL is a single-channel femtoampere-input electrometer amplifier with a restricted supply range. Their channel count, input bias current class, supply voltage range, and package footprint all differ, so substituting one for the other requires a full circuit redesign and validation.
Different channel count
Different input bias current class
Different supply voltage range
Different package footprint
Parts at a glance
Part B
ADA4530-1ARZ-RL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 7738 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 | ADA4522-4ARZ | ADA4530-1ARZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 | 1 | Determines how many independent signal channels can be processed in a single package; a quad vs single device is not a drop-in substitute. |
| Input Offset Voltage (Max) | 5 µV | 20 µV | Lower offset improves DC accuracy in precision signal chains; the difference affects error budget in high-gain or low-level measurement circuits. |
| Input Bias Current (Typ) | 50 pA | 1 fA | Ultra-low bias current is critical for high-impedance sensors and electrometer applications; the femtoampere-class part is essential where picoampere leakage would cause error. |
| Gain Bandwidth Product | 2.7 MHz | 2 MHz | Sets the achievable closed-loop bandwidth and speed of the amplifier; affects dynamic response and stability in feedback designs. |
| Supply Voltage Range | 4.5 V to 55 V | 4.5 V to 16 V | Defines compatibility with the system power rail; the wider high-voltage capability of one part allows use in industrial rails where the other cannot operate. |
| Input Voltage Noise Density (1 kHz) | 5.8 nV/√Hz | 14 nV/√Hz | Lower noise density improves SNR in low-level signal amplification; the difference matters in precision measurement front ends. |
| Operating Temperature Range | -40 °C to 125 °C | -40 °C to 85 °C | Determines suitability for harsh or high-temperature environments; the extended-range part supports industrial and automotive-grade applications. |
| Package / Pin Count | 14-Lead SOIC | 8-Lead SOIC | Footprint and pinout compatibility are required for board-level substitution; different packages require layout changes. |
| Quiescent Current per Amplifier (Typ) | 830 µA | 550 µA | Affects power budget in portable and low-power systems; the per-amplifier consumption influences total system current draw. |
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 | ADA4522-4ARZ | ADA4530-1ARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Zero-Drift | General Purpose |
| Number of Circuits | 4 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 1.7V/µs | 1.4V/µs |
| Gain Bandwidth Product | 2.7 MHz | 2 MHz |
| -3 dB Bandwidth | 6.5 MHz | 5.5 MHz |
| Current - Input Bias | 50 pA | 0.02 pA |
| Voltage - Input Offset | 1.5 µV | 8 µV |
| Supply Current | 830µA (x4 Channels) | 900µA |
| Current - Output / Channel | 32 mA | 15 mA |
| Voltage - Supply Span(Min) | 4.5 V | 4.5 V |
| Voltage - Supply Span(Max) | 55 V | 16 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 ADA4522-4ARZ and the ADA4530-1ARZ-RL?
The ADA4522-4ARZ is a quad-channel, 55 V zero-drift operational amplifier with a typical offset voltage of 5 µV and a gain bandwidth of 2.7 MHz, supplied in a 14-lead SOIC package. The ADA4530-1ARZ-RL is a single-channel, 16 V femtoampere-input-bias electrometer amplifier with a typical input bias current of 20 fA and a gain bandwidth of 2 MHz, supplied in an 8-lead SOIC package. The ADA4522-4ARZ targets high-voltage precision signal conditioning, while the ADA4530-1ARZ-RL targets ultra-low input bias current sensing applications.
Can the ADA4522-4ARZ and ADA4530-1ARZ-RL be substituted for each other directly?
No. They differ in channel count (quad vs single), supply voltage range (4.5 V to 55 V vs 4.5 V to 16 V), package and pinout (14-lead SOIC vs 8-lead SOIC), and input bias current (typically 50 pA vs 20 fA). A direct substitution is not possible without redesign and validation against the respective datasheets.
Which device is better suited for ultra-low input bias current measurements?
The ADA4530-1ARZ-RL is specifically designed as a femtoampere-level electrometer amplifier, with a typical input bias current of 20 fA at 25 °C. The ADA4522-4ARZ has a typical input bias current of 50 pA, which is several orders of magnitude higher, so the ADA4530-1ARZ-RL is the appropriate choice for ultra-low bias current sensing.
What are the supply voltage ranges of the ADA4522-4ARZ and ADA4530-1ARZ-RL?
The ADA4522-4ARZ operates from a single supply of 4.5 V to 55 V or a dual supply of ±2.25 V to ±27.5 V. The ADA4530-1ARZ-RL operates from a single supply of 4.5 V to 16 V or a dual supply of ±2.25 V to ±8 V. Designs requiring supply voltages above 16 V must use the ADA4522-4ARZ.
How do the offset voltage and drift specifications compare?
The ADA4522-4ARZ has a typical offset voltage of 5 µV and a maximum offset voltage drift of 22 nV/°C. The ADA4530-1ARZ-RL has a typical offset voltage of 10 µV and a maximum offset voltage drift of 50 nV/°C. Both are zero-drift amplifiers, but the ADA4522-4ARZ offers tighter typical offset and drift specifications.
Do both amplifiers support rail-to-rail input and output operation?
Yes. Both the ADA4522-4ARZ and the ADA4530-1ARZ-RL feature rail-to-rail input and output stages, allowing signal swing close to both supply rails. This makes both devices suitable for precision signal chains operating over their respective specified supply ranges.
What are the gain bandwidth and noise characteristics of each device?
The ADA4522-4ARZ has a gain bandwidth of 2.7 MHz and a typical voltage noise density of 5.8 nV/√Hz at 1 kHz. The ADA4530-1ARZ-RL has a gain bandwidth of 2 MHz and a typical voltage noise density of 14 nV/√Hz at 1 kHz. The ADA4522-4ARZ provides higher bandwidth and lower voltage noise, while the ADA4530-1ARZ-RL prioritizes ultra-low input bias current.
In which package options are the ADA4522-4ARZ and ADA4530-1ARZ-RL available?
The ADA4522-4ARZ is supplied in a 14-lead SOIC package. The ADA4530-1ARZ-RL is supplied in an 8-lead SOIC package and is provided in tape-and-reel format as indicated by the RL suffix. The different package sizes and pin counts prevent footprint-compatible interchange.