Part A
ADA4077-2ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5777 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The ADA4077-2ARZ is a viable functional replacement candidate for the ADA4075-2ARZ in most precision signal-conditioning applications, as both share the same SOIC-8 package, dual-channel configuration, and comparable supply voltage range. However, the ADA4077-2ARZ offers lower voltage noise and lower offset voltage, while the ADA4075-2ARZ provides higher output current drive and a wider gain-bandwidth product, so the substitution should be validated against the specific noise, bandwidth, and load-driving requirements of the target design.
Package Type
High match
Channel Count
High match
Gain Bandwidth Product
Validation required
Output Current Drive
Validation required
Parts at a glance
Part B
ADA4075-2ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1638 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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 | 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) | 125 µV | 25 µV | Lower offset voltage improves DC precision; the ADA4077-2 offers significantly better offset performance. |
| Input Bias Current (Typ) | 1.5 nA | 0.5 nA | Lower bias current reduces errors in high-impedance circuits; the ADA4077-2 is superior here. |
| Gain Bandwidth Product | 6.5 MHz | 3.6 MHz | GBW determines the maximum usable frequency for a given gain; the ADA4075-2 supports higher bandwidth applications. |
| Slew Rate | 2.5 V/µs | 1.2 V/µs | Higher slew rate enables faster large-signal response; the ADA4075-2 is better for high-speed signal handling. |
| Input Voltage Noise Density (1 kHz) | 11 nV/√Hz | 7 nV/√Hz | Lower voltage noise improves SNR in low-level signal applications; the ADA4077-2 is quieter. |
| Supply Current per Amplifier (Typ) | 0.9 mA | 0.4 mA | Lower supply current reduces power consumption; the ADA4077-2 is more power-efficient. |
| Supply Voltage Range | ±4.5 V to ±18 V | ±2.5 V to ±15 V | The ADA4075-2 supports higher supply voltages, while the ADA4077-2 operates at lower minimum supplies for low-voltage systems. |
| Common-Mode Rejection Ratio (Typ) | 120 dB | 130 dB | Higher CMRR rejects common-mode noise better; the ADA4077-2 offers superior rejection. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both cover the same industrial temperature range, so thermal suitability is equivalent. |
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 | ADA4077-2ARZ | ADA4075-2ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| Slew Rate | 1.2V/µs | 12V/µs |
| Gain Bandwidth Product | 3.6 MHz | 6.5 MHz |
| -3 dB Bandwidth | 5.5 MHz | - |
| Current - Input Bias | 400 pA | 30 nA |
| Voltage - Input Offset | 15 µV | 200 µV |
| Supply Current | 400µA (x2 Channels) | 1.8mA (x2 Channels) |
| Current - Output / Channel | 10 mA | 40 mA |
| Voltage - Supply Span(Min) | 5 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 |
| Series | - | iPolar® |
Frequently asked questions
What are the key differences between the ADA4075-2ARZ and ADA4077-2ARZ operational amplifiers?
The ADA4075-2ARZ is a dual low-power, low-noise op amp with a typical supply current of 200 µA per amplifier and a typical voltage noise density of 22 nV/√Hz at 1 kHz. The ADA4077-2ARZ is a dual precision op amp with lower offset voltage (25 µV maximum), lower drift (0.25 µV/°C typical), and lower voltage noise (7 nV/√Hz typical at 1 kHz), but with higher supply current (approximately 400 µA per amplifier typical). Both are available in 8-lead SOIC packages and operate over the −40 °C to +125 °C temperature range.
Are the ADA4075-2ARZ and ADA4077-2ARZ pin-compatible?
Yes. Both devices are offered in the 8-lead SOIC (R-8) package with the same standard dual op amp 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 board-level interchangeability when the electrical specifications of the replacement meet the design requirements.
Which device offers lower input offset voltage and drift?
The ADA4077-2ARZ offers significantly better DC precision. Its maximum input offset voltage is 25 µV, compared to 300 µV maximum for the ADA4075-2ARZ. The ADA4077-2ARZ also specifies a typical offset voltage drift of 0.25 µV/°C, whereas the ADA4075-2ARZ specifies a typical drift of 2 µV/°C. The ADA4077-2ARZ is therefore preferable for precision DC signal conditioning applications.
How do the supply current and power consumption of the two devices compare?
The ADA4075-2ARZ is the lower-power option, with a typical supply current of 200 µA per amplifier (400 µA total for the dual). The ADA4077-2ARZ typically draws approximately 400 µA per amplifier (800 µA total). For battery-powered or energy-constrained designs, the ADA4075-2ARZ provides a meaningful reduction in quiescent current.
Which device has lower voltage noise density?
The ADA4077-2ARZ has lower voltage noise, with a typical voltage noise density of 7 nV/√Hz at 1 kHz. The ADA4075-2ARZ specifies a typical voltage noise density of 22 nV/√Hz at 1 kHz. For low-level signal amplification where noise performance is critical, the ADA4077-2ARZ is the better choice.
What are the gain bandwidth and slew rate specifications for each device?
The ADA4075-2ARZ has a typical gain bandwidth product of 2 MHz and a typical slew rate of 1.5 V/µs. The ADA4077-2ARZ has a typical gain bandwidth product of 3.6 MHz and a typical slew rate of 1.2 V/µs. The ADA4077-2ARZ provides higher small-signal bandwidth, while the ADA4075-2ARZ offers a slightly higher slew rate.
Can the ADA4075-2ARZ and ADA4077-2ARZ operate from the same supply voltages?
Yes. Both devices are specified for dual-supply operation over a range of ±2.5 V to ±15 V (or equivalently 5 V to 30 V single supply). This common supply range allows either device to be used in the same power rail configuration, provided the other electrical specifications meet the application requirements.
Which device is better suited for precision instrumentation applications?
The ADA4077-2ARZ is better suited for precision instrumentation due to its lower input offset voltage (25 µV maximum), lower offset drift (0.25 µV/°C typical), lower input bias current, and lower voltage noise (7 nV/√Hz typical). The ADA4075-2ARZ is more appropriate for low-power applications where moderate precision and low quiescent current are the primary requirements.