Part A
ADA4077-2ARZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5777 ПКС
- Package
- SOIC-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Compatible functional replacement candidate
The ADA4062-2BRZ-RL is a viable functional replacement candidate for the ADA4077-2ARZ in many low-power, low-frequency signal conditioning applications, provided the reduced bandwidth, slew rate, and common-mode input range are validated against the target circuit requirements. Both devices share the same dual op-amp configuration and SOIC-8 footprint, but the ADA4062-2 trades AC performance and precision for substantially lower supply current, so designers must confirm that the application does not depend on the ADA4077-2's higher gain-bandwidth, faster slew rate, or tighter offset specifications before substituting.
Package Type
High match
Channel Count
High match
Gain Bandwidth Product
Validation required
Supply Current
Validation required
Parts at a glance
Part B
ADA4062-2BRZ-RL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9861 ПКС
- Package
- SOIC-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADA4077-2ARZ | ADA4062-2BRZ-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) | 25 µV | 250 µV | Lower offset voltage improves DC precision; the ADA4077-2 is roughly an order of magnitude more precise, which matters in high-accuracy signal chains. |
| Input Bias Current (Typ) | 0.5 nA | 2 pA | Bias current affects error in high-impedance circuits; the ADA4062-2 JFET input offers far lower bias current for electrometer-like or high-source-impedance applications. |
| Gain Bandwidth Product | 3.6 MHz | 1.4 MHz | GBW determines achievable closed-loop bandwidth; the ADA4077-2 supports wider-bandwidth signal processing than the ADA4062-2. |
| Slew Rate | 1.2 V/µs | 0.5 V/µs | Slew rate limits large-signal response; the ADA4077-2 handles faster transients and higher-frequency large signals. |
| Input Voltage Noise Density (1 kHz) | 7 nV/√Hz | 36 nV/√Hz | Lower voltage noise improves SNR in low-level signal amplification; the ADA4077-2 is significantly quieter. |
| Supply Voltage Range | ±2.5 V to ±15 V (5 V to 30 V) | ±5 V to ±15 V (10 V to 30 V) | The ADA4077-2 operates at lower supply voltages, enabling use in 5 V single-supply systems where the ADA4062-2 cannot operate. |
| Input Stage Technology | Bipolar | JFET | Bipolar inputs offer lower voltage noise and better DC precision, while JFET inputs offer extremely low bias current; this affects the choice for high-impedance vs low-noise applications. |
| Quiescent Current per Amplifier (Typ) | 0.4 mA | 0.25 mA | Lower quiescent current reduces power consumption; the ADA4062-2 is more suitable for power-sensitive designs. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both cover the industrial/extended temperature range, so thermal compatibility is maintained for substitution. |
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 | ADA4062-2BRZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | J-FET |
| Number of Circuits | 2 | 2 |
| Slew Rate | 1.2V/µs | 3.3V/µs |
| Gain Bandwidth Product | 3.6 MHz | 1.4 MHz |
| Current - Input Bias | 400 pA | 2 pA |
| Voltage - Input Offset | 15 µV | 500 µV |
| Supply Current | 400µA (x2 Channels) | 165µA (x2 Channels) |
| Current - Output / Channel | 10 mA | 20 mA |
| Voltage - Supply Span(Min) | 5 V | 8 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 |
| -3 dB Bandwidth | 5.5 MHz | - |
Frequently asked questions
What are the key differences between the ADA4077-2ARZ and ADA4062-2BRZ-RL?
The ADA4077-2ARZ is a dual, low-noise, low-offset-voltage operational amplifier from Analog Devices with a typical offset voltage of 25 µV and a typical voltage noise density of 7 nV/√Hz at 1 kHz, housed in an 8-lead SOIC package. The ADA4062-2BRZ-RL is a dual, low-power JFET-input operational amplifier with very low input bias current (typically 1 pA) and a typical supply current of 200 µA per amplifier, supplied in an 8-lead SOIC package on tape and reel. The ADA4077-2 is optimized for precision DC accuracy and low noise, while the ADA4062-2 is optimized for high input impedance and low power consumption.
Are the ADA4077-2ARZ and ADA4062-2BRZ-RL pin-compatible?
Both devices are offered in an 8-lead SOIC package with the standard dual op-amp pinout (1: OUT A, 2: −IN A, 3: +IN A, 4: V−, 5: +IN B, 6: −IN B, 7: OUT B, 8: V+). However, pin compatibility alone does not guarantee functional interchangeability; the surrounding circuit must be validated against each device's input bias current, input common-mode range, and supply requirements.
Which device has lower input bias current, the ADA4077-2ARZ or the ADA4062-2BRZ-RL?
The ADA4062-2BRZ-RL has a substantially lower input bias current, typically 1 pA at 25°C, owing to its JFET input stage. The ADA4077-2ARZ uses a bipolar input stage with a typical input bias current of 1 nA. For high-source-impedance applications such as photodiode or pH sensor front ends, the ADA4062-2 is generally the more suitable choice.
How do the noise characteristics of the ADA4077-2ARZ and ADA4062-2BRZ-RL compare?
The ADA4077-2ARZ is specified with a typical voltage noise density of 7 nV/√Hz at 1 kHz, making it suitable for low-noise precision signal conditioning. The ADA4062-2BRZ-RL has a higher typical voltage noise density of approximately 36 nV/√Hz at 1 kHz. For applications where voltage noise is critical, the ADA4077-2 is the better fit; for high-impedance, low-power applications, the ADA4062-2's low current noise and low bias current may be more important.
What are the supply voltage and quiescent current specifications for each device?
The ADA4077-2ARZ operates from a dual supply of ±2.5 V to ±15 V (or 5 V to 30 V single supply) with a typical supply current of 400 µA per amplifier. The ADA4062-2BRZ-RL operates from ±4.5 V to ±18 V (or 9 V to 36 V single supply) with a typical supply current of 200 µA per amplifier. The ADA4062-2 therefore offers lower power consumption, while the ADA4077-2 supports lower minimum supply voltages.
Can the ADA4062-2BRZ-RL be used as a direct replacement for the ADA4077-2ARZ in a precision DC application?
Not without careful evaluation. The ADA4077-2ARZ offers a typical offset voltage of 25 µV and low offset drift, whereas the ADA4062-2BRZ-RL has a higher typical offset voltage (on the order of millivolts) and different drift behavior. In precision DC applications, substituting the ADA4062-2 for the ADA4077-2 would likely degrade accuracy, so the circuit must be re-validated against the target error budget.
What are the operating temperature ranges for the ADA4077-2ARZ and ADA4062-2BRZ-RL?
Both the ADA4077-2ARZ and the ADA4062-2BRZ-RL are specified for the industrial temperature range of −40°C to +125°C, making them suitable for industrial and instrumentation applications requiring extended temperature operation.
Which device is better suited for high-impedance sensor interfaces?
The ADA4062-2BRZ-RL is generally better suited for high-impedance sensor interfaces because its JFET input stage provides very low input bias current (typically 1 pA) and high input impedance, minimizing loading and offset errors. The ADA4077-2ARZ, with its bipolar input stage and 1 nA typical bias current, is better suited to lower-impedance precision signal chains where low voltage noise and low offset voltage are the dominant requirements.