Part A
ADA4062-2ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6529 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The ADA4062-2ARZ can serve as a functional replacement candidate for the ADA4084-2ARZ in many low-frequency, low-power signal-conditioning applications, since both are dual op-amps in the same 8-lead SOIC package with identical pinout. However, the ADA4084-2ARZ offers substantially higher bandwidth, slew rate, and output drive, so the substitution requires validation of AC performance, capacitive-load stability, and output current headroom in the target circuit.
Package and Pinout
High match
Supply Voltage Range
Validation required
Gain Bandwidth Product
Not compatible
Input Bias Current
Validation required
Parts at a glance
Part B
ADA4084-2ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3798 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 | ADA4084-2ARZ | ADA4062-2ARZ | 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. |
| Supply Voltage Range | 3 V to 30 V (±1.5 V to ±15 V) | ±5 V to ±15 V (10 V to 30 V) | The wider low-voltage capability of the ADA4084-2ARZ allows operation in 3 V or single-supply systems where the ADA4062-2ARZ cannot be used. |
| Input Offset Voltage (Max) | 0.1 mV (typical 50 µV) | 2.5 mV (typical 0.75 mV) | Lower offset voltage improves DC precision; the ADA4084-2ARZ offers significantly better offset performance for precision signal chains. |
| Input Bias Current (Typical) | 0.5 nA | 2 pA | The JFET-input ADA4062-2ARZ has far lower bias current, making it preferable for high-impedance sensor and photodiode applications. |
| Gain Bandwidth Product | 15.9 MHz | 1.4 MHz | Higher GBW in the ADA4084-2ARZ supports wider signal bandwidth and faster settling, while the ADA4062-2ARZ suits lower-frequency precision tasks. |
| Slew Rate | 4.6 V/µs | 3.3 V/µs | Faster slew rate enables larger full-power bandwidth and quicker transient response in the ADA4084-2ARZ. |
| Input Voltage Noise Density | 3.9 nV/√Hz | 22 nV/√Hz | Lower voltage noise in the ADA4084-2ARZ benefits low-level signal amplification and improves SNR in precision applications. |
| Quiescent Current per Amplifier | 0.625 mA | 0.2 mA | The ADA4062-2ARZ draws less supply current, making it better suited for power-sensitive or battery-operated designs. |
| Input Common-Mode Voltage Range | Rail-to-rail input (includes both rails) | Within supply rails (not rail-to-rail) | Rail-to-rail input of the ADA4084-2ARZ allows sensing signals near either supply rail, whereas the ADA4062-2ARZ requires headroom from the rails. |
| Output Swing | Rail-to-rail output | Near rail-to-rail output | Full rail-to-rail output of the ADA4084-2ARZ maximizes dynamic range in low-voltage single-supply designs. |
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 | ADA4084-2ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | J-FET | General Purpose |
| Number of Circuits | 2 | 2 |
| Slew Rate | 3.3V/µs | 4.6V/µs |
| Gain Bandwidth Product | 1.4 MHz | 15.9 MHz |
| Current - Input Bias | 2 pA | 140 nA |
| Voltage - Input Offset | 750 µV | 30 µV |
| Supply Current | 165µA (x2 Channels) | 625µA (x2 Channels) |
| Current - Output / Channel | 20 mA | 30 mA |
| Voltage - Supply Span(Min) | 8 V | 3 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 |
| Output Type | - | Rail-to-Rail |
| -3 dB Bandwidth | - | 13.9 MHz |
Frequently asked questions
What are the key differences between the ADA4084-2ARZ and ADA4062-2ARZ operational amplifiers?
The ADA4084-2ARZ is a dual, low noise, rail-to-rail input/output (RRIO) op amp with a gain bandwidth product of 10 MHz and a typical voltage noise density of 3.9 nV/√Hz. The ADA4062-2ARZ is a dual, low power, JFET-input op amp with a gain bandwidth product of 1.4 MHz and a typical voltage noise density of 36 nV/√Hz. The ADA4084-2ARZ is optimized for low noise and wide bandwidth, while the ADA4062-2ARZ is optimized for low input bias current and low power consumption.
Are the ADA4084-2ARZ and ADA4062-2ARZ pin-compatible in the SOIC-8 package?
Yes. Both the ADA4084-2ARZ and ADA4062-2ARZ are offered in an 8-lead SOIC package with the same 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+). This allows them to share the same PCB land pattern, though electrical performance differences must be evaluated before substitution.
How do the input bias currents of the ADA4084-2ARZ and ADA4062-2ARZ compare?
The ADA4062-2ARZ, with its JFET input stage, has a very low typical input bias current of approximately 2 pA at 25°C. The ADA4084-2ARZ, with a bipolar input stage, has a typical input bias current of approximately 140 nA at 25°C. The ADA4062-2ARZ is therefore preferable for high-impedance sensor interfaces where input bias current is critical.
Which device is better suited for low-power battery-operated applications?
The ADA4062-2ARZ is better suited for low-power applications. It typically draws about 0.2 mA per amplifier, whereas the ADA4084-2ARZ typically draws about 0.625 mA per amplifier. The lower quiescent current of the ADA4062-2ARZ extends battery life in portable designs.
How do the supply voltage ranges of the ADA4084-2ARZ and ADA4062-2ARZ differ?
The ADA4084-2ARZ operates from a single supply of 3 V to 30 V (or dual supplies of ±1.5 V to ±15 V). The ADA4062-2ARZ operates from a single supply of 5 V to 36 V (or dual supplies of ±2.5 V to ±18 V). The ADA4084-2ARZ supports lower supply voltages, making it suitable for 3 V or 5 V single-supply systems, while the ADA4062-2ARZ requires a minimum 5 V single supply.
Which op amp offers better performance for low-noise signal conditioning?
The ADA4084-2ARZ offers significantly better low-noise performance, with a typical voltage noise density of 3.9 nV/√Hz at 1 kHz compared to approximately 36 nV/√Hz for the ADA4062-2ARZ. For precision low-level signal conditioning, the ADA4084-2ARZ is the preferred choice, provided its higher supply current is acceptable.
Can the ADA4062-2ARZ be used as a drop-in replacement for the ADA4084-2ARZ?
Not without design validation. Although both are dual op amps in the same 8-lead SOIC package with identical pinouts, they differ in gain bandwidth (1.4 MHz vs 10 MHz), input bias current (pA vs nA range), voltage noise (36 nV/√Hz vs 3.9 nV/√Hz), supply current, and minimum supply voltage. Circuit stability, bandwidth, and accuracy must be re-verified against the ADA4062-2ARZ datasheet before substitution.