Part A
ADA4077-1ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5601 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Not a drop-in replacement
The ADA4062-2ARZ and ADA4077-1ARZ are not drop-in replacements for each other. The ADA4062-2ARZ is a dual-channel JFET-input operational amplifier, while the ADA4077-1ARZ is a single-channel precision bipolar operational amplifier. They differ in channel count, input bias current, supply current, and package pinout, so a direct board-level substitution is not possible without design changes.
Different channel count
Different input bias current
Different supply current
Different pinout
Parts at a glance
Part B
ADA4062-2ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6529 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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 | ADA4077-1ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (dual) | 1 (single) | Channel count determines package pinout and PCB layout; a dual cannot directly replace a single without layout changes. |
| Input Offset Voltage (max) | 250 µV | 25 µV | Lower offset improves DC accuracy; the ADA4077-1ARZ is roughly 10x more precise, affecting precision measurement applications. |
| Input Bias Current (typ) | 0.5 pA (JFET input) | 0.5 nA (bipolar input) | JFET inputs offer far lower bias current, critical for high-impedance sensor and photodiode front-ends. |
| Gain Bandwidth Product | 1.4 MHz | 3.6 MHz | Higher GBW supports wider signal bandwidth and faster closed-loop response in the ADA4077-1ARZ. |
| Slew Rate | 3.3 V/µs | 1.2 V/µs | Slew rate limits large-signal bandwidth; the ADA4062-2ARZ handles faster transients despite lower GBW. |
| Input Voltage Noise Density | 36 nV/√Hz | 7 nV/√Hz | Lower noise density benefits low-level signal amplification; the ADA4077-1ARZ is significantly quieter. |
| Supply Voltage Range | ±5 V to ±15 V (10 V to 30 V) | ±2.5 V to ±15 V (5 V to 30 V) | The ADA4077-1ARZ operates at lower supply voltages, enabling use in low-voltage single-supply systems. |
| Quiescent Current per Amplifier (typ) | 0.2 mA | 0.4 mA | Lower quiescent current extends battery life; the ADA4062-2ARZ is more power-efficient per amplifier. |
| Input Common-Mode Voltage Range | Rail-to-rail input (includes both rails) | Within 1.2 V of positive rail | Rail-to-rail input allows full-range sensing; the ADA4062-2ARZ supports signals near both supply rails. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical industrial temperature range means both suit harsh environments equally. |
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 | ADA4077-1ARZ | ADA4062-2ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | J-FET |
| Number of Circuits | 1 | 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 | 750 µV |
| Supply Current | 400µA | 165µA (x2 Channels) |
| Current - Output / Channel | 22 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 |
Frequently asked questions
What are the primary differences between the ADA4062-2ARZ and ADA4077-1ARZ?
The ADA4062-2ARZ is a dual-channel, low-power JFET-input operational amplifier, while the ADA4077-1ARZ is a single-channel, high-precision bipolar-input operational amplifier. The ADA4062-2ARZ offers two amplifiers per package with JFET inputs, whereas the ADA4077-1ARZ provides one amplifier per package with bipolar inputs optimized for low offset voltage and low noise.
Are the ADA4062-2ARZ and ADA4077-1ARZ pin-compatible?
No. The ADA4062-2ARZ is supplied in an 8-lead SOIC package containing two operational amplifiers, while the ADA4077-1ARZ is supplied in an 8-lead SOIC package containing a single operational amplifier with different pin assignments. They are not direct drop-in replacements for each other.
How do the input bias currents of the ADA4062-2ARZ and ADA4077-1ARZ compare?
The ADA4062-2ARZ, with its JFET input stage, provides very low input bias current typically in the picoampere range, making it suitable for high-impedance sensor interfaces. The ADA4077-1ARZ, using a bipolar input stage, has higher input bias current typically in the nanoampere range, though it delivers superior offset voltage and drift performance.
Which device is better suited for low-noise precision signal conditioning?
The ADA4077-1ARZ is generally preferred for low-noise precision signal conditioning due to its bipolar input architecture, which provides low voltage noise and excellent offset voltage stability. The ADA4062-2ARZ is better suited for low-power, high-impedance applications where low input bias current is the dominant requirement.
Do the ADA4062-2ARZ and ADA4077-1ARZ operate on the same supply voltage range?
Both devices support dual-supply operation, but their specified supply ranges differ. The ADA4062-2ARZ operates on supplies from ±5 V to ±15 V, while the ADA4077-1ARZ is specified for operation from ±2.5 V to ±15 V. Designers should verify the exact supply range against the respective manufacturer datasheets for the target application.
Can the ADA4062-2ARZ replace the ADA4077-1ARZ in an existing single-amplifier circuit?
Not directly. The ADA4062-2ARZ is a dual amplifier in an 8-lead package, so only one channel could be used, but the pinout differs from the single ADA4077-1ARZ. Additionally, the JFET versus bipolar input characteristics change offset, bias current, and noise behavior, so circuit performance must be revalidated before substitution.
Which part offers lower power consumption per amplifier?
The ADA4062-2ARZ is designed as a low-power JFET-input amplifier, with typical supply current per amplifier in the low hundreds of microamperes. The ADA4077-1ARZ, optimized for precision, draws higher supply current per amplifier. For battery-powered or energy-sensitive designs, the ADA4062-2ARZ is generally the lower-power choice.