Part A
ADA4004-2ARMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3179 PCS
- Package
- MSOP-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The ADA4077-2ARMZ and ADA4004-2ARMZ are both dual precision operational amplifiers in the same 8-lead MSOP package with identical pinout, making them a strong functional replacement candidate. The ADA4077-2ARMZ offers lower typical offset voltage and lower input bias current, while the ADA4004-2ARMZ provides higher gain bandwidth and faster slew rate. Designers should validate noise, bandwidth, and supply current against their specific application requirements before substituting.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
High match
Gain Bandwidth Product
Validation required
Parts at a glance
Part B
ADA4077-2ARMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5568 PCS
- Package
- MSOP-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 | ADA4077-2ARMZ | ADA4004-2ARMZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is identical and does not affect substitutability. |
| Input Offset Voltage (Max) | 25 µV | 125 µV | Lower offset voltage improves DC precision; the ADA4077-2 offers tighter offset, which matters for high-accuracy signal chains. |
| Input Voltage Noise Density (1 kHz) | 7 nV/√Hz | 6 nV/√Hz | Lower noise density benefits low-level signal amplification; the ADA4004-2 is slightly quieter at 1 kHz. |
| Gain Bandwidth Product | 3.6 MHz | 12 MHz | GBW determines achievable closed-loop bandwidth; the ADA4004-2 supports wider-bandwidth applications. |
| Slew Rate | 1.2 V/µs | 2.7 V/µs | Higher slew rate allows faster large-signal response; the ADA4004-2 handles faster transients. |
| Supply Current per Amplifier (Typ) | 0.4 mA | 1.7 mA | Lower supply current reduces power consumption; the ADA4077-2 is preferable for low-power designs. |
| Input Bias Current (Max, 25°C) | 1 nA | 90 nA | Lower bias current reduces errors in high-impedance circuits; the ADA4077-2 is better suited for such applications. |
| Supply Voltage Range | ±2.5 V to ±15 V | ±4.5 V to ±15 V | The wider low-end range of the ADA4077-2 allows operation at lower supply voltages, improving flexibility. |
| Common-Mode Rejection Ratio (Min) | 120 dB | 110 dB | Higher CMRR rejects common-mode noise better; the ADA4077-2 offers superior rejection for precision measurement. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Identical package and pinout allow direct board-level substitution without layout changes. |
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 | ADA4004-2ARMZ | ADA4077-2ARMZ |
|---|---|---|
| Series | iPolar® | - |
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| 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 | 50 µV |
| Current - Output / Channel | 10 mA | 10 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 |
| -3 dB Bandwidth | - | 5.5 MHz |
| Supply Current | - | 400µA (x2 Channels) |
Frequently asked questions
What are the key differences between the ADA4077-2ARMZ and ADA4004-2ARMZ?
Both are dual precision operational amplifiers in 8-lead MSOP (RMZ) packages, but they differ in supply voltage range, input bias current, and noise. The ADA4077-2ARMZ operates from ±2.5 V to ±15 V (5 V to 30 V total) with a typical input bias current of 1 nA and a typical voltage noise density of 7 nV/√Hz at 1 kHz. The ADA4004-2ARMZ operates from ±4 V to ±15 V (±8 V to ±30 V total) with a typical input bias current of 40 nA and a typical voltage noise density of 6 nV/√Hz at 1 kHz. The ADA4077-2ARMZ is specified for lower supply operation and lower input bias current, while the ADA4004-2ARMZ offers slightly lower voltage noise.
Are the ADA4077-2ARMZ and ADA4004-2ARMZ pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP (RMZ) package with the same pinout: pin 1 = OUT A, pin 2 = −IN A, pin 3 = +IN A, pin 4 = V−, pin 5 = +IN B, pin 6 = −IN B, pin 7 = OUT B, and pin 8 = V+. This allows a common PCB footprint, but electrical differences must still be validated before substitution.
Can the ADA4077-2ARMZ be used as a direct replacement for the ADA4004-2ARMZ?
Not unconditionally. Although the package and pinout match, the ADA4004-2ARMZ requires a minimum total supply of 8 V (±4 V), whereas the ADA4077-2ARMZ operates down to 5 V total (±2.5 V). In circuits operating below 8 V total supply, the ADA4004-2ARMZ cannot be used, so the ADA4077-2ARMZ is the only valid choice. In circuits at 8 V or above, substitution requires verifying input bias current, noise, and offset specifications against the design requirements.
How do the input bias currents of the ADA4077-2ARMZ and ADA4004-2ARMZ compare?
The ADA4077-2ARMZ has a typical input bias current of 1 nA (1.5 nA maximum at 25°C per the datasheet), while the ADA4004-2ARMZ has a typical input bias current of 40 nA (60 nA maximum at 25°C). The ADA4077-2ARMZ is therefore preferable in high-impedance or low-leakage applications where input bias current errors must be minimized.
How do the voltage noise specifications of these two amplifiers compare?
The ADA4004-2ARMZ has a typical voltage noise density of 6 nV/√Hz at 1 kHz, while the ADA4077-2ARMZ has a typical voltage noise density of 7 nV/√Hz at 1 kHz. The ADA4004-2ARMZ provides slightly lower voltage noise, making it marginally better for low-noise signal conditioning, though both are precision low-noise amplifiers.
What are the supply voltage ranges for the ADA4077-2ARMZ and ADA4004-2ARMZ?
The ADA4077-2ARMZ is specified for dual supplies of ±2.5 V to ±15 V (5 V to 30 V total). The ADA4004-2ARMZ is specified for dual supplies of ±4 V to ±15 V (8 V to 30 V total). The ADA4077-2ARMZ supports lower supply voltages, which is a key selection criterion when operating from 5 V or ±2.5 V rails.
Do both amplifiers share the same operating temperature range?
Yes. Both the ADA4077-2ARMZ and ADA4004-2ARMZ are specified over the industrial temperature range of −40°C to +125°C, so temperature range is not a differentiator between these two parts.
Which applications favor the ADA4077-2ARMZ versus the ADA4004-2ARMZ?
The ADA4077-2ARMZ is favored for low-supply-voltage systems (down to 5 V total) and high-impedance sensor interfaces requiring low input bias current. The ADA4004-2ARMZ is favored in low-noise precision signal chains operating at 8 V total supply or above where its slightly lower voltage noise is beneficial. Final selection should be based on verified datasheet limits for supply, bias current, noise, and offset in the target circuit.