Part A
ADA4004-4ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4895 Stückzahl
- Package
- SOIC-14
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Not a drop-in replacement
The ADA4077-1ARZ and ADA4004-4ARZ are not functionally interchangeable: they differ in channel count, package and pinout, supply voltage range, and input bias current, so the ADA4004-4ARZ cannot directly replace the ADA4077-1ARZ in an existing design without circuit and layout changes.
Different channel count
Different package and pinout
Different supply voltage range
Different input bias current
Parts at a glance
Part B
ADA4077-1ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5601 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 | ADA4077-1ARZ | ADA4004-4ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 4 | Determines how many independent op-amp channels are available in a single package; a quad device can replace multiple singles but not vice versa without board redesign. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Footprint and pin count must match the PCB layout; different package sizes prevent direct drop-in substitution. |
| Supply Voltage Range | ±4 V to ±15 V (8 V to 30 V total) | ±4 V to ±15 V (8 V to 30 V total) | Defines the operating supply window; matching ranges allow the same power rail design to be reused. |
| Input Offset Voltage (max) | 25 µV | 50 µV | Low offset is critical for precision DC signal chains; both are precision-grade, though the single offers tighter guaranteed offset. |
| Input Voltage Noise Density | 7 nV/√Hz (typical) | 6 nV/√Hz (typical) | Sets the noise floor for low-level signal amplification; comparable values mean similar noise performance in sensitive applications. |
| Gain Bandwidth Product | 3.6 MHz | 12 MHz | Determines closed-loop bandwidth and speed; the quad part offers higher bandwidth, affecting achievable signal frequency and settling. |
| Input Bias Current (max) | 1 nA | 1 nA | Low bias current minimizes errors in high-impedance sensor and feedback networks; identical values preserve input error behavior. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms both parts are rated for industrial/extended temperature environments, supporting use in harsh conditions. |
| Quiescent Current per Amplifier | ~0.4 mA (typical) | ~0.4 mA (typical) | Affects total power budget; similar per-amplifier current means comparable efficiency, though total package draw scales with channel count. |
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 | ADA4077-1ARZ |
|---|---|---|
| Series | iPolar® | - |
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 1 |
| Slew Rate | 2.7V/µs | 1.2V/µs |
| Gain Bandwidth Product | 12 MHz | 3.6 MHz |
| Current - Input Bias | 40 nA | 400 pA |
| Voltage - Input Offset | 40 µV | 15 µV |
| Current - Output / Channel | 10 mA | 22 mA |
| Voltage - Supply Span(Min) | 10 V | 5 V |
| Voltage - Supply Span(Max) | 30 V | 30 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Supply Current | - | 400µA |
Frequently asked questions
What are the key differences between the ADA4077-1ARZ and ADA4004-4ARZ?
The ADA4077-1ARZ is a single-channel, low-noise, low-offset-voltage operational amplifier in an 8-lead SOIC package, while the ADA4004-4ARZ is a quad-channel version of the ADA4004 family in a 14-lead SOIC package. The ADA4077-1 offers lower voltage noise (approximately 3.1 nV/√Hz at 1 kHz) and lower offset voltage than the ADA4004-4, whereas the ADA4004-4 provides four amplifiers per package with slightly higher noise (approximately 6 nV/√Hz at 1 kHz).
Can the ADA4077-1ARZ be used as a direct replacement for one channel of the ADA4004-4ARZ?
No, they are not pin-compatible or package-compatible. The ADA4077-1ARZ is a single op amp in an 8-lead SOIC, while the ADA4004-4ARZ is a quad op amp in a 14-lead SOIC. A direct drop-in replacement is not possible; any substitution requires a PCB redesign and validation against the target application requirements.
How do the noise specifications of the ADA4077-1ARZ and ADA4004-4ARZ compare?
The ADA4077-1ARZ has a typical voltage noise density of approximately 3.1 nV/√Hz at 1 kHz, making it suitable for low-noise signal conditioning. The ADA4004-4ARZ has a typical voltage noise density of approximately 6 nV/√Hz at 1 kHz. For applications requiring the lowest noise per channel, the ADA4077-1ARZ is the better choice, while the ADA4004-4ARZ trades slightly higher noise for quad-channel integration.
What are the offset voltage characteristics of these two amplifiers?
The ADA4077-1ARZ features a very low typical input offset voltage of approximately 25 µV (maximum 100 µV for the A-grade), which is beneficial for precision DC applications. The ADA4004-4ARZ has a typical input offset voltage of approximately 100 µV (maximum 250 µV). The ADA4077-1ARZ offers superior offset performance for high-precision single-channel designs.
What are the supply voltage and bandwidth specifications for the ADA4077-1ARZ and ADA4004-4ARZ?
Both amplifiers operate from dual supplies of ±2.5 V to ±15 V (or single-supply 5 V to 30 V). The ADA4077-1ARZ has a gain bandwidth product of approximately 4 MHz, while the ADA4004-4ARZ has a gain bandwidth product of approximately 12 MHz. The ADA4004-4ARZ provides higher bandwidth per channel, which may be advantageous in higher-frequency signal paths.
Which applications are better suited for the ADA4077-1ARZ versus the ADA4004-4ARZ?
The ADA4077-1ARZ is well suited for precision, low-noise, single-channel applications such as sensor signal conditioning, medical instrumentation, and low-level transducer amplification where offset and noise are critical. The ADA4004-4ARZ is better suited for multi-channel systems requiring four matched amplifiers in a compact footprint, such as active filters, multi-channel data acquisition front ends, and audio or industrial control signal chains where board space is a constraint.
Are the ADA4077-1ARZ and ADA4004-4ARZ pin-compatible with each other?
No. The ADA4077-1ARZ uses an 8-lead SOIC package with a single op amp pinout, while the ADA4004-4ARZ uses a 14-lead SOIC package with a quad op amp pinout. The pin functions, package dimensions, and PCB land patterns differ, so they cannot be interchanged without a board redesign.