Part A
ADA4004-4ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4895 PCS
- Package
- SOIC-14
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The ADA4075-2ARZ and ADA4004-4ARZ share the same dual/quad precision op-amp family lineage and identical SOIC package style, but differ in channel count and supply current per amplifier. The ADA4075-2ARZ is a dual device while the ADA4004-4ARZ is a quad, so substitution is only viable where the additional channels and board layout can be accommodated; electrical performance is closely aligned, making it a functional candidate rather than a direct drop-in.
Channel Count
Validation required
Package Type
High match
Supply Voltage Range
High match
Supply Current per Amplifier
Validation required
Parts at a glance
Part B
ADA4075-2ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1638 PCS
- Package
- SOIC-8
- 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 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 4 | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Input Offset Voltage (Max) | 125 µV | 100 µV | Lower offset voltage reduces DC error in precision signal chains, affecting accuracy in instrumentation and sensor interfaces. |
| Input Voltage Noise Density (1 kHz) | 2.8 nV/√Hz | 1.8 nV/√Hz | Lower voltage noise improves signal-to-noise ratio in low-level audio and precision measurement applications. |
| Gain Bandwidth Product | 6.5 MHz | 12 MHz | GBW sets the achievable closed-loop bandwidth and settling behavior; higher GBW supports faster, wider-band signal processing. |
| Slew Rate | 2.5 V/µs | 2.7 V/µs | Slew rate limits large-signal response and full-power bandwidth; affects distortion at high frequencies and fast transients. |
| Supply Current per Amplifier (Typ) | 0.9 mA | 1.7 mA | Quiescent current impacts power budget and thermal design, especially in battery-powered or high-channel-count systems. |
| Supply Voltage Range | ±4.5 V to ±15 V (9 V to 30 V) | ±4.5 V to ±15 V (9 V to 30 V) | Defines the allowable power supply window; matching ranges ensures the part can drop into the same rail configuration. |
| Input Bias Current (Typ) | 25 nA | 40 nA | Bias current creates offset errors across source impedances; lower bias current benefits high-impedance sensor and filter circuits. |
| Package | 8-Lead SOIC | 14-Lead SOIC | Package footprint and pin count must match the PCB layout; different packages require board redesign and affect thermal and assembly considerations. |
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 | ADA4004-4ARZ | ADA4075-2ARZ |
|---|---|---|
| Series | iPolar® | iPolar® |
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 2 |
| Slew Rate | 2.7V/µs | 12V/µs |
| Gain Bandwidth Product | 12 MHz | 6.5 MHz |
| Current - Input Bias | 40 nA | 30 nA |
| Voltage - Input Offset | 40 µV | 200 µV |
| Current - Output / Channel | 10 mA | 40 mA |
| Voltage - Supply Span(Min) | 10 V | 9 V |
| Voltage - Supply Span(Max) | 30 V | 36 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 ADA4004-4ARZ?
The ADA4075-2ARZ is a dual low-noise, low-power operational amplifier in an 8-lead SOIC package, while the ADA4004-4ARZ is a quad precision operational amplifier in a 14-lead SOIC package. The ADA4075-2 features a typical voltage noise density of 2.8 nV/√Hz at 1 kHz with a supply current of approximately 2.5 mA per amplifier, whereas the ADA4004-4 offers lower typical offset voltage (75 µV max) and lower input bias current (30 nA max) per amplifier, making it suited for precision multi-channel signal conditioning.
Can the ADA4075-2ARZ be used as a drop-in replacement for the ADA4004-4ARZ?
No. The two devices differ in package pin count (8-lead SOIC vs 14-lead SOIC), channel count (dual vs quad), and pinout, so they are not footprint-compatible. A direct substitution is not possible without a PCB redesign and validation against the target application requirements.
How do the supply voltage ranges of the ADA4075-2ARZ and ADA4004-4ARZ compare?
Both devices operate from a dual supply of ±4.5 V to ±15 V (or single supply of 9 V to 30 V). The ADA4075-2ARZ is specified over the −40 °C to +125 °C temperature range, and the ADA4004-4ARZ is specified over the −40 °C to +125 °C range as well, so supply and temperature envelopes are comparable.
Which device offers lower input voltage noise for low-noise signal chains?
The ADA4075-2ARZ provides a typical input voltage noise density of 2.8 nV/√Hz at 1 kHz, which is lower than the ADA4004-4ARZ typical value of 6 nV/√Hz at 1 kHz. For low-noise front-end designs, the ADA4075-2 is generally the better choice, while the ADA4004-4 prioritizes DC precision across four channels.
How do the quiescent supply currents of the ADA4075-2ARZ and ADA4004-4ARZ compare?
The ADA4075-2ARZ draws approximately 2.5 mA per amplifier (typical), while the ADA4004-4ARZ draws approximately 1.7 mA per amplifier (typical). Per-channel power consumption is therefore lower on the ADA4004-4, though the quad device's total package current is higher due to four amplifiers.
What are the offset voltage specifications for each device?
The ADA4075-2ARZ has a maximum input offset voltage of 200 µV (typical 50 µV), while the ADA4004-4ARZ specifies a maximum input offset voltage of 75 µV (typical 25 µV). The ADA4004-4 therefore provides tighter DC precision per amplifier, which matters in high-gain precision instrumentation.
Which device is better suited for multi-channel precision applications?
The ADA4004-4ARZ integrates four precision amplifiers in a single 14-lead SOIC, offering lower offset voltage and lower input bias current per channel, which reduces board space and channel-to-channel matching effort in multi-channel precision systems. The ADA4075-2ARZ is preferable when only two channels are needed and lower voltage noise is the dominant requirement.
Are the ADA4075-2ARZ and ADA4004-4ARZ pin-compatible with each other?
No. The ADA4075-2ARZ uses an 8-lead SOIC (R-8) package with dual-amplifier pinout, and the ADA4004-4ARZ uses a 14-lead SOIC (R-14) package with quad-amplifier pinout. The differing package sizes and pin assignments preclude pin-to-pin compatibility.