Part A
ADA4001-2ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3781 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Not a drop-in replacement
The ADA4077-1ARZ and ADA4001-2ARZ differ in channel count, package footprint, and supply voltage range, so the ADA4001-2ARZ cannot serve as a direct drop-in substitute for the ADA4077-1ARZ without circuit and layout redesign.
Different channel count
Different package footprint
Different supply voltage range
Different quiescent current
Parts at a glance
Part B
ADA4077-1ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5601 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 | ADA4077-1ARZ | ADA4001-2ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent op-amp channels are available in a single package; a dual cannot directly replace a single in a one-channel circuit without layout changes. |
| Input Offset Voltage (max) | 25 µV | 1.5 mV | Lower offset voltage improves DC accuracy; the ADA4077 is a precision part while the ADA4001 is a general-purpose JFET part, so DC precision requirements differ significantly. |
| Input Bias Current (typ) | 0.5 nA | 5 pA | Bias current affects error in high-impedance circuits; the JFET-input ADA4001 has far lower bias current, making it preferable for high source-impedance applications. |
| Gain Bandwidth Product | 3.6 MHz | 10 MHz | GBW sets the achievable closed-loop bandwidth and small-signal speed; the ADA4001 offers higher bandwidth for faster signal processing. |
| Slew Rate | 1.2 V/µs | 20 V/µs | Slew rate limits large-signal transient response; the much higher slew rate of the ADA4001 suits faster, larger-swing signals. |
| Input Voltage Noise Density | 7 nV/√Hz | 16 nV/√Hz | Lower voltage noise improves SNR in low-level signal amplification; the ADA4077 is quieter for precision low-noise front ends. |
| Supply Voltage Range | ±2.5 V to ±15 V (4.5 V to 30 V) | ±4 V to ±18 V (8 V to 36 V) | Operating supply range determines compatibility with the system rails; the ADA4077 works at lower supply voltages where the ADA4001 does not. |
| Input Stage Technology | Bipolar | JFET | Input technology governs bias current, noise, and impedance characteristics; bipolar offers lower voltage noise while JFET offers ultra-low bias current. |
| Quiescent Current per Amplifier (typ) | 0.4 mA | 1.7 mA | Quiescent current impacts power budget; the ADA4077 draws less supply current per amplifier, favoring low-power designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADA4001-2ARZ | ADA4077-1ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | J-FET | General Purpose |
| Number of Circuits | 2 | 1 |
| Output Type | Rail-to-Rail | - |
| Slew Rate | 25V/µs | 1.2V/µs |
| Gain Bandwidth Product | 16.7 MHz | 3.6 MHz |
| -3 dB Bandwidth | 10.3 MHz | - |
| Current - Input Bias | 20 pA | 400 pA |
| Voltage - Input Offset | 500 µV | 15 µV |
| Supply Current | 2mA (x2 Channels) | 400µA |
| Current - Output / Channel | 50 mA | 22 mA |
| Voltage - Supply Span(Min) | 10 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 ADA4077-1ARZ and the ADA4001-2ARZ?
The ADA4077-1ARZ is a single-channel, low-noise, low-offset-voltage operational amplifier, while the ADA4001-2ARZ is a dual-channel, low-noise, low-input-bias-current operational amplifier. The ADA4077-1ARZ is offered in an 8-lead SOIC package, whereas the ADA4001-2ARZ is offered in an 8-lead SOIC package as a dual device. Channel count, input bias current, and offset voltage specifications differ between the two parts.
Can the ADA4077-1ARZ be used as a direct replacement for the ADA4001-2ARZ?
No. The ADA4077-1ARZ is a single op amp and the ADA4001-2ARZ is a dual op amp, so the channel count and pin functions differ. A direct drop-in substitution is not possible without verifying pinout, channel count, and circuit requirements against the respective manufacturer datasheets.
How do the input bias current specifications compare between the ADA4077-1ARZ and ADA4001-2ARZ?
The ADA4001-2ARZ is specified with very low input bias current, making it suitable for high-impedance sensor interfaces. The ADA4077-1ARZ has a higher input bias current specification than the ADA4001-2ARZ. Designers should consult the official Analog Devices datasheets for the exact maximum input bias current values over temperature before selecting between the two.
Which device is better suited for low-offset precision applications?
The ADA4077-1ARZ is specified with low offset voltage and low offset voltage drift, making it well suited to precision DC applications. The ADA4001-2ARZ is optimized for low input bias current and low noise rather than minimum offset voltage. The appropriate choice depends on whether offset voltage or input bias current is the dominant error source in the application.
Do both parts operate from the same supply voltage range?
Both the ADA4077-1ARZ and the ADA4001-2ARZ are specified for dual-supply operation in the range of ±2.5 V to ±15 V (5 V to 30 V total supply), consistent with Analog Devices datasheet specifications. Actual guaranteed limits and performance over the full supply range should be confirmed on the respective manufacturer datasheets.
What package options are available for each device?
The ADA4077-1ARZ is supplied in an 8-lead SOIC package (the "ARZ" suffix denotes SOIC, RoHS-compliant). The ADA4001-2ARZ is also supplied in an 8-lead SOIC package as a dual operational amplifier. Package footprint and pinout must be verified against the datasheets before any layout reuse.
Are both devices RoHS compliant?
Yes. The "Z" suffix in both the ADA4077-1ARZ and ADA4001-2ARZ part numbers indicates RoHS-compliant packaging per Analog Devices nomenclature. Compliance documentation should be confirmed through the manufacturer or an authorized distributor such as DigiKey or Mouser.