Part A
ADA4805-2ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1854 ПКС
- Package
- MSOP-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Compatible functional replacement candidate
The ADA4805-2ARMZ is a viable functional replacement candidate for the ADA4896-2ARMZ in many low-power signal-chain applications, sharing the same dual-channel SOIC-8 footprint and similar unity-gain bandwidth class. However, designers must validate supply voltage headroom, output drive current, and dynamic performance, since the ADA4805-2 trades bandwidth and output current for substantially lower quiescent current. Final selection should be confirmed against application-specific AC and DC requirements.
Package and Pinout
High match
Supply Voltage Range
Validation required
Gain Bandwidth Product
Validation required
Output Drive Current
Validation required
Parts at a glance
Part B
ADA4896-2ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5675 ПКС
- 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 | ADA4896-2ARMZ | ADA4805-2ARMZ | Why it matters |
|---|---|---|---|
| -3 dB Bandwidth | 90 MHz (G = +1) | 105 MHz (G = +1) | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable gain, affecting high-speed signal fidelity. |
| Input Voltage Noise Density | 1 nV/√Hz | 3.1 nV/√Hz | Lower input voltage noise improves signal-to-noise ratio in precision and low-level signal applications. |
| Slew Rate | 120 V/µs | 160 V/µs | Slew rate limits how fast the output can respond to large signal changes, impacting large-signal bandwidth and distortion. |
| Supply Current per Amplifier | 3 mA | 0.5 mA | Supply current directly affects power consumption, critical for portable and power-sensitive designs. |
| Input Offset Voltage | 0.23 mV (max) | 0.125 mV (max) | Lower offset voltage reduces DC error, improving accuracy in precision signal conditioning. |
| Supply Voltage Range | 3 V to 10 V | 2.7 V to 10 V | The supply range determines compatibility with system power rails and low-voltage operation capability. |
| Gain Bandwidth Product | 230 MHz | 80 MHz | GBP indicates achievable closed-loop bandwidth at higher gains, affecting performance in gain-stage configurations. |
| Output Current | 80 mA | 50 mA | Output drive capability determines the ability to drive low-impedance loads such as ADCs or cables. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range defines the environments in which the device can reliably operate. |
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 | ADA4805-2ARMZ | ADA4896-2ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 250V/µs | 120V/µs |
| -3 dB Bandwidth | 120 MHz | 230 MHz |
| Current - Input Bias | 550 nA | 4 µA |
| Voltage - Input Offset | 13 µV | 28 µV |
| Supply Current | 570µA (x2 Channels) | 3mA (x2 Channels) |
| Current - Output / Channel | 73 mA | 80 mA |
| Voltage - Supply Span(Min) | 2.7 V | 3 V |
| Voltage - Supply Span(Max) | 10 V | 10 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Gain Bandwidth Product | - | 90 MHz |
Frequently asked questions
What are the primary differences between the ADA4896-2ARMZ and ADA4805-2ARMZ?
The ADA4896-2ARMZ is a high-speed, low-noise voltage feedback operational amplifier with a 230 MHz gain bandwidth product and 120 V/µs slew rate, while the ADA4805-2ARMZ is a lower power, lower bandwidth amplifier with a 105 MHz gain bandwidth product and 160 V/µs slew rate. The ADA4896-2ARMZ is optimized for low noise (1 nV/√Hz) and high dynamic performance, whereas the ADA4805-2ARMZ emphasizes lower quiescent current per amplifier.
Are the ADA4896-2ARMZ and ADA4805-2ARMZ pin-compatible?
Yes, both devices are offered in the same 8-lead MSOP (RM) package with identical pin functions, allowing them to share a common PCB land pattern. However, pin compatibility does not guarantee electrical interchangeability, and the surrounding circuit must be validated for the different bandwidth, noise, and supply current characteristics.
How do the quiescent supply currents of the ADA4896-2ARMZ and ADA4805-2ARMZ compare?
The ADA4896-2ARMZ typically draws approximately 3 mA per amplifier, while the ADA4805-2ARMZ typically draws approximately 500 µA per amplifier. The ADA4805-2ARMZ is therefore better suited to power-sensitive applications, whereas the ADA4896-2ARMZ trades higher supply current for lower voltage noise and higher bandwidth.
Which device offers lower input voltage noise, the ADA4896-2ARMZ or ADA4805-2ARMZ?
The ADA4896-2ARMZ specifies a typical input voltage noise density of 1 nV/√Hz, which is significantly lower than the ADA4805-2ARMZ typical value of approximately 5.5 nV/√Hz. The ADA4896-2ARMZ is therefore preferable for low-noise signal conditioning and precision front-end applications.
What are the gain bandwidth products of the ADA4896-2ARMZ and ADA4805-2ARMZ?
The ADA4896-2ARMZ has a gain bandwidth product of 230 MHz, while the ADA4805-2ARMZ has a gain bandwidth product of 105 MHz. The higher bandwidth of the ADA4896-2ARMZ supports wider signal chains and faster settling in high-speed applications.
Can the ADA4805-2ARMZ be used as a direct drop-in replacement for the ADA4896-2ARMZ?
Although both parts share the same 8-lead MSOP package and pinout, the ADA4805-2ARMZ has lower bandwidth, higher input voltage noise, and lower quiescent current than the ADA4896-2ARMZ. A direct substitution is only acceptable after verifying that the reduced bandwidth and increased noise meet the application requirements and that stability with the existing feedback network is confirmed.
What supply voltage ranges do the ADA4896-2ARMZ and ADA4805-2ARMZ support?
Both the ADA4896-2ARMZ and ADA4805-2ARMZ operate from dual supplies of ±2.5 V to ±5 V or single supplies of 5 V to 10 V. Designers should confirm the exact supply range and output swing requirements against the respective manufacturer datasheets for the target operating conditions.