Part A
ADA4075-2ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1638 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Not a drop-in replacement
The ADA4075-2ARZ and ADA4004-4ARZ-RL are not functionally interchangeable: they differ in channel count, package and pinout, supply voltage range, and quiescent current, so the ADA4004-4ARZ-RL cannot be substituted for the ADA4075-2ARZ without a board redesign and revalidation.
Different channel count
Different package and pinout
Different supply voltage range
Different quiescent current
Parts at a glance
Part B
ADA4004-4ARZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8634 PCS
- Package
- SOIC-14
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADA4075-2ARZ | ADA4004-4ARZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 4 | Determines how many independent signal channels can be processed in one package; a direct substitute must match the channel count required by the circuit. |
| Input Offset Voltage (max) | 125 µV | 100 µV | Lower offset voltage reduces DC error in precision signal chains; a mismatch affects accuracy of high-gain or DC-coupled stages. |
| Input Voltage Noise Density (1 kHz) | 11 nV/√Hz | 6.9 nV/√Hz | Noise density sets the achievable signal-to-noise ratio; lower noise parts are preferred in low-level sensor and audio front ends. |
| Gain Bandwidth Product | 6.5 MHz | 12 MHz | GBW limits closed-loop bandwidth and settling; a slower part may not meet dynamic performance requirements of the original design. |
| Slew Rate | 2.8 V/µs | 2.7 V/µs | Slew rate bounds large-signal response and full-power bandwidth; similar values indicate comparable transient behavior. |
| Supply Current per Amplifier (typ) | 0.9 mA | 1.7 mA | Quiescent current affects power budget and thermal load; higher per-amplifier current may exceed supply or thermal limits. |
| Supply Voltage Range | ±4.5 V to ±18 V (9 V to 36 V) | ±4.5 V to ±18 V (9 V to 36 V) | Defines the allowable power rails; matching ranges ensure the substitute operates safely in the existing supply architecture. |
| Input Bias Current (typ) | 25 nA | 40 nA | Bias current creates offset across source impedances; higher bias current increases error in high-impedance nodes. |
| Package | 8-Lead SOIC | 14-Lead SOIC | Footprint and pinout must match the PCB layout; different package sizes require board redesign and cannot be drop-in substituted. |
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 | ADA4075-2ARZ | ADA4004-4ARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | iPolar® | iPolar® |
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 4 |
| Slew Rate | 12V/µs | 2.7V/µs |
| Gain Bandwidth Product | 6.5 MHz | 12 MHz |
| Current - Input Bias | 30 nA | 40 nA |
| Voltage - Input Offset | 200 µV | 40 µV |
| Current - Output / Channel | 40 mA | 10 mA |
| Voltage - Supply Span(Min) | 9 V | 10 V |
| Voltage - Supply Span(Max) | 36 V | 30 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Supply Current | 1.8mA (x2 Channels) | - |
Frequently asked questions
What are the key differences between the ADA4075-2ARZ and the ADA4004-4ARZ-RL?
The ADA4075-2ARZ is a dual low-power, low-noise operational amplifier in an 8-lead SOIC package, while the ADA4004-4ARZ-RL is a quad low-noise, low-power operational amplifier in a 14-lead SOIC package. The primary differences are channel count (2 vs. 4), package size (8-lead vs. 14-lead SOIC), and the associated pinout and PCB footprint.
Are the ADA4075-2ARZ and ADA4004-4ARZ-RL pin-compatible?
No. The ADA4075-2ARZ uses an 8-lead SOIC package with a dual op-amp pinout, while the ADA4004-4ARZ-RL uses a 14-lead SOIC package with a quad op-amp pinout. They are not pin-compatible and cannot be dropped into the same PCB land pattern.
Can the ADA4075-2ARZ be used as a substitute for the ADA4004-4ARZ-RL in an existing design?
Not directly. Substitution requires verifying channel count requirements, package footprint, pinout, supply voltage range, and all AC/DC specifications against the target design. The ADA4075-2ARZ provides only two amplifiers versus four in the ADA4004-4ARZ-RL, so a direct replacement is not possible without design changes.
What are the supply voltage ranges for these two amplifiers?
Both the ADA4075-2ARZ and ADA4004-4ARZ-RL are specified for operation on dual supplies typically ranging from ±4.5 V to ±15 V (or equivalent single-supply rails), consistent with the Analog Devices ADA4075-2 and ADA4004-4 datasheets. Designers should confirm the exact limits in the respective manufacturer datasheets before use.
How do the noise characteristics of the ADA4075-2ARZ and ADA4004-4ARZ-RL compare?
Both devices are low-noise operational amplifiers from Analog Devices. The ADA4075-2 is characterized by low voltage noise density suitable for precision signal conditioning, and the ADA4004-4 is similarly specified for low-noise performance. For exact voltage noise density and current noise figures, refer to the respective manufacturer datasheets, as the values differ between the two parts.
What are the package and mounting options for each part?
The ADA4075-2ARZ is supplied in an 8-lead SOIC package (RoHS-compliant, "Z" suffix), and the ADA4004-4ARZ-RL is supplied in a 14-lead SOIC package in tape-and-reel format ("RL" suffix). Both are surface-mount SOIC devices intended for automated PCB assembly.
Which part should be selected for a design requiring four amplifier channels?
The ADA4004-4ARZ-RL should be selected when four operational amplifiers are required in a single package, as it is a quad device. The ADA4075-2ARZ contains only two amplifiers and would require two packages to achieve four channels, increasing board area and component count.
Are both parts RoHS-compliant and from the same manufacturer?
Yes. Both the ADA4075-2ARZ and ADA4004-4ARZ-RL are Analog Devices operational amplifiers, and the "Z" suffix in both part numbers indicates RoHS-compliant packaging per Analog Devices nomenclature. Designers should verify current compliance status on the official manufacturer or authorized distributor documentation.