Part A
ADA4062-2ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6529 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The ADA4077-2ARZ-RL is a viable functional replacement candidate for the ADA4062-2ARZ in precision, low-frequency signal-conditioning applications, as both are dual operational amplifiers in the same 8-lead SOIC package with identical pinout. However, the ADA4077-2ARZ-RL offers substantially lower input bias current, lower offset voltage, and lower voltage noise, while the ADA4062-2ARZ provides wider bandwidth and higher slew rate. Designers must validate supply range, input common-mode headroom, and capacitive-load stability before substituting in noise-sensitive or high-speed circuits.
Package and Pinout
High match
Input Bias Current
High match
Gain Bandwidth Product
Validation required
Supply Voltage Range
Validation required
Parts at a glance
Part B
ADA4077-2ARZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8573 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 | ADA4062-2ARZ | 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-amplifier circuits. |
| Input Offset Voltage (Max) | 2.5 mV | 25 µV | The ADA4077 offers far lower offset voltage, which is critical for precision DC and low-level signal applications where the ADA4062 may introduce larger errors. |
| Input Bias Current (Typ) | 0.5 pA | 0.5 nA | The ADA4062 has JFET inputs with extremely low bias current, making it preferable for high-impedance sensor interfaces, whereas the ADA4077 bipolar input draws more bias current. |
| Gain Bandwidth Product | 1.4 MHz | 3.6 MHz | The ADA4077 provides wider bandwidth, supporting higher-frequency signal processing than the ADA4062. |
| Slew Rate | 3.3 V/µs | 1.2 V/µs | The ADA4062 slews faster, which benefits large-signal transient response, while the ADA4077 is slower but more precise. |
| Input Voltage Noise Density (1 kHz) | 36 nV/√Hz | 7 nV/√Hz | The ADA4077 has significantly lower voltage noise, making it better suited for low-noise precision signal chains. |
| Supply Voltage Range | ±5 V to ±15 V | ±2.5 V to ±15 V | The ADA4077 operates at lower supply voltages, enabling use in lower-voltage systems where the ADA4062 cannot function. |
| Quiescent Current per Amplifier (Typ) | 0.2 mA | 0.4 mA | The ADA4062 draws less supply current, which is advantageous for power-sensitive or battery-operated designs. |
| Input Stage Type | JFET | Bipolar | JFET inputs (ADA4062) suit high-impedance and low-bias-current applications, while bipolar inputs (ADA4077) offer lower offset and noise for precision circuits. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pinout allow drop-in board replacement 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 | ADA4062-2ARZ | ADA4077-2ARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Amplifier Type | J-FET | General Purpose |
| Number of Circuits | 2 | 2 |
| Slew Rate | 3.3V/µs | 1.2V/µs |
| Gain Bandwidth Product | 1.4 MHz | 3.6 MHz |
| -3 dB Bandwidth | - | 5.5 MHz |
| Current - Input Bias | 2 pA | 400 pA |
| Voltage - Input Offset | 750 µV | 15 µV |
| Supply Current | 165µA (x2 Channels) | 400µA (x2 Channels) |
| Current - Output / Channel | 20 mA | 10 mA |
| Voltage - Supply Span(Min) | 8 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 |
Frequently asked questions
What are the key differences between the ADA4062-2ARZ and the ADA4077-2ARZ-RL?
The ADA4062-2ARZ is a dual JFET-input operational amplifier, while the ADA4077-2ARZ-RL is a dual precision bipolar-input operational amplifier. The ADA4062-2 offers very low input bias current and high input impedance, making it suitable for high-impedance sensor interfaces. The ADA4077-2 provides lower offset voltage, lower voltage noise, and higher open-loop gain, making it better suited for precision DC and low-frequency applications. Both are dual op amps in 8-lead SOIC packages.
Are the ADA4062-2ARZ 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 = 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, Pin 8 = V+. This allows them to share the same PCB footprint, though electrical performance differences must be evaluated for the target application.
Which device has lower input bias current, the ADA4062-2ARZ or the ADA4077-2ARZ-RL?
The ADA4062-2ARZ has significantly lower input bias current due to its JFET input stage, typically in the picoampere range. The ADA4077-2ARZ-RL uses a bipolar input stage with input bias current in the nanoampere range. For applications requiring extremely high source impedance or minimal bias current error, the ADA4062-2 is generally preferred.
Which device offers better precision in terms of offset voltage?
The ADA4077-2ARZ-RL offers lower input offset voltage and lower offset voltage drift than the ADA4062-2ARZ. The ADA4077-2 is designed for precision applications where DC accuracy is critical, while the ADA4062-2 prioritizes high input impedance and low bias current over offset precision.
How do the voltage noise characteristics compare between the two devices?
The ADA4077-2ARZ-RL has lower voltage noise density than the ADA4062-2ARZ, making it more suitable for low-noise signal conditioning. The ADA4062-2, with its JFET input, offers very low current noise, which can be advantageous in high-impedance circuits where current noise dominates. The choice depends on whether voltage noise or current noise is the dominant concern in the application.
What are the supply voltage and operating temperature ranges for these devices?
Both the ADA4062-2ARZ and ADA4077-2ARZ-RL operate from dual supplies typically ranging from ±5 V to ±15 V (or equivalent single-supply ranges within the specified total supply voltage). Both are specified for the industrial temperature range of -40°C to +125°C. Designers should consult the respective manufacturer datasheets for exact minimum and maximum supply limits and temperature specifications.
Can the ADA4062-2ARZ and ADA4077-2ARZ-RL be used interchangeably in an existing design?
They are pin-compatible but not electrically interchangeable without evaluation. The ADA4062-2ARZ is optimized for high input impedance and low bias current, while the ADA4077-2ARZ-RL is optimized for precision DC accuracy and low voltage noise. Substitution may affect offset error, noise performance, stability, and bandwidth. A thorough review of the application requirements against both datasheets is required before replacing one with the other.
Which device is better suited for high-impedance sensor interfaces?
The ADA4062-2ARZ is generally better suited for high-impedance sensor interfaces because its JFET input stage provides very low input bias current and high input impedance, minimizing loading and error. The ADA4077-2ARZ-RL, with bipolar inputs, has higher bias current and may introduce larger errors in very high-impedance nodes, though it offers better offset and noise performance for lower-impedance precision signal chains.