Part A
ADA4075-2ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1638 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The ADA4077-2ARZ-RL is a viable functional replacement candidate for the ADA4075-2ARZ in many precision signal-conditioning applications, as both are dual low-noise op amps in the same 8-lead SOIC package with compatible supply ranges. However, the ADA4077-2ARZ-RL offers lower offset voltage and lower input bias current while drawing less quiescent current per amplifier, so the designer must validate bandwidth, slew-rate, and noise performance against the specific circuit requirements before substituting.
Package and Pinout
High match
Supply Voltage Range
High match
Gain Bandwidth and Slew Rate
Validation required
Input Offset Voltage and Noise
Validation required
Parts at a glance
Part B
ADA4077-2ARZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8573 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
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 | ADA4077-2ARZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for direct substitution in dual-channel circuits. |
| Gain Bandwidth Product | 6.5 MHz | 3.6 MHz | GBW determines the maximum signal frequency the amplifier can handle at a given gain; the ADA4075-2 offers higher bandwidth. |
| Input Offset Voltage (max) | 125 µV | 25 µV | Lower offset voltage improves DC precision; the ADA4077-2 is significantly more precise for high-accuracy signal chains. |
| Input Voltage Noise Density | 11 nV/√Hz | 7 nV/√Hz | Lower voltage noise benefits low-level signal amplification; the ADA4077-2 provides better noise performance. |
| Supply Current per Amplifier | 1.8 mA | 0.9 mA | Quiescent current affects power budget; the ADA4077-2 draws roughly half the supply current, favoring battery-powered designs. |
| Slew Rate | 2.5 V/µs | 1.2 V/µs | Slew rate limits large-signal transient response; the ADA4075-2 handles faster signal edges. |
| Supply Voltage Range | ±4.5 V to ±18 V | ±2.5 V to ±15 V | Operating voltage range must match the system rails; the ADA4075-2 supports higher supply voltages while the ADA4077-2 supports lower rails. |
| Input Bias Current (typ) | -1.5 nA | -0.5 nA | Low bias current reduces errors in high-impedance circuits; the ADA4077-2 offers lower bias current for precision applications. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Package and footprint compatibility enable drop-in replacement; both are 8-lead SOIC, though the ADA4077-2ARZ-RL is supplied on tape and reel. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADA4075-2ARZ | ADA4077-2ARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| Slew Rate | 12V/µs | 1.2V/µs |
| Gain Bandwidth Product | 6.5 MHz | 3.6 MHz |
| -3 dB Bandwidth | - | 5.5 MHz |
| Current - Input Bias | 30 nA | 400 pA |
| Voltage - Input Offset | 200 µV | 15 µV |
| Supply Current | 1.8mA (x2 Channels) | 400µA (x2 Channels) |
| Current - Output / Channel | 40 mA | 10 mA |
| Voltage - Supply Span(Min) | 9 V | 5 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 |
| Series | iPolar® | - |
Frequently asked questions
What are the key differences between the ADA4075-2ARZ and the ADA4077-2ARZ-RL?
The ADA4075-2ARZ and ADA4077-2ARZ-RL are both dual operational amplifiers from Analog Devices in an 8-lead SOIC package, but they differ in their performance characteristics. The ADA4075-2 is a low-power, low-noise amplifier with a typical supply current of 0.5 mA per amplifier and a typical voltage noise density of 11 nV/√Hz at 1 kHz. The ADA4077-2 is a higher-precision amplifier with lower offset voltage (typically 25 µV maximum for the A grade), lower drift, and a typical supply current of 0.9 mA per amplifier. The ADA4077-2ARZ-RL is supplied in tape-and-reel packaging, while the ADA4075-2ARZ is typically supplied in tube packaging.
Are the ADA4075-2ARZ and ADA4077-2ARZ-RL pin-compatible?
Yes. Both devices are dual operational amplifiers offered in the standard 8-lead SOIC (R-8) package with the same pinout: pin 1 and pin 7 are the outputs, pin 2 and pin 6 are the inverting inputs, pin 3 and pin 5 are the non-inverting inputs, pin 4 is V−, and pin 8 is V+. This allows them to share the same PCB land pattern, though electrical performance differences must be evaluated for the target design.
How do the supply current and power consumption of the two devices compare?
The ADA4075-2 has a typical supply current of 0.5 mA per amplifier (1.0 mA total for the dual), while the ADA4077-2 has a typical supply current of 0.9 mA per amplifier (1.8 mA total). The ADA4075-2 therefore consumes less quiescent power, making it preferable for power-sensitive applications, whereas the ADA4077-2 trades higher supply current for improved precision.
Which device offers better DC precision, the ADA4075-2ARZ or the ADA4077-2ARZ-RL?
The ADA4077-2 offers better DC precision. It features a maximum input offset voltage of 25 µV (A grade) and low offset voltage drift, along with high open-loop gain. The ADA4075-2 has a higher typical offset voltage specification and is optimized for low noise and low power rather than precision DC performance. For precision signal conditioning, the ADA4077-2 is the more suitable choice.
How does the voltage noise performance of the ADA4075-2ARZ compare with the ADA4077-2ARZ-RL?
The ADA4075-2 is specified with a typical voltage noise density of 11 nV/√Hz at 1 kHz, making it a low-noise amplifier. The ADA4077-2 has a typical voltage noise density of approximately 7 nV/√Hz at 1 kHz, which is lower than that of the ADA4075-2. Both devices are suitable for low-noise signal chains, but the ADA4077-2 provides lower broadband noise while the ADA4075-2 offers lower supply current.
What is the difference in packaging between the ADA4075-2ARZ and the ADA4077-2ARZ-RL?
Both parts use the 8-lead SOIC package. The suffix "-RL" on the ADA4077-2ARZ-RL indicates tape-and-reel packaging, which is intended for automated high-volume assembly. The ADA4075-2ARZ is typically supplied in tube packaging. The package body and pinout are identical, so the difference is in the shipping/assembly format rather than the device itself.
Can the ADA4075-2ARZ and ADA4077-2ARZ-RL be used interchangeably in a design?
They are pin-compatible and share the same package, but they are not electrically identical. The ADA4077-2 offers lower offset voltage, lower noise, and higher precision, while the ADA4075-2 offers lower supply current. Substitution should only be made after verifying that supply current, noise, offset voltage, bandwidth, and stability requirements of the target circuit are met by the replacement device, per the respective manufacturer datasheets.
What are the supply voltage ranges for the ADA4075-2ARZ and ADA4077-2ARZ-RL?
Both devices operate from dual supplies. The ADA4075-2 is specified for operation from ±4.5 V to ±15 V (9 V to 30 V total). The ADA4077-2 is specified for operation from ±2.5 V to ±15 V (5 V to 30 V total), giving it a wider low-supply capability. Designs operating at low total supply voltages should confirm the minimum supply requirement against the selected device's datasheet.