Part A
ADA4841-2YRMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5986 個数
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The ADA4805-2ARMZ and ADA4841-2YRMZ are both dual, low-power, rail-to-rail output voltage feedback operational amplifiers in 8-lead MSOP packages, making them a viable functional replacement candidate in many signal-conditioning designs. However, the ADA4805-2ARMZ offers substantially higher bandwidth and slew rate with lower supply current, while the ADA4841-2YRMZ provides lower input voltage noise and a wider specified supply range. Designers should validate dynamic performance, noise budget, and supply headroom against the target application before substituting one for the other.
Package and Pinout
High match
Channel Count
High match
Supply Voltage Range
Validation required
Bandwidth and Slew Rate
Validation required
Parts at a glance
Part B
ADA4805-2ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1854 個数
- Package
- MSOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADA4805-2ARMZ | ADA4841-2YRMZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for direct substitution. |
| Gain Bandwidth Product | 105 MHz | 80 MHz | GBW determines the maximum signal frequency the amplifier can handle at a given gain; the ADA4805-2 offers higher bandwidth. |
| Input Voltage Noise Density | 5.5 nV/√Hz | 2.1 nV/√Hz | Lower input noise improves signal-to-noise ratio in precision and low-level signal applications; the ADA4841-2 is significantly quieter. |
| Supply Voltage Range | 3 V to 10 V (±1.5 V to ±5 V) | 2.7 V to 12 V (±1.35 V to ±6 V) | The supply range must cover the system rail voltages; the ADA4841-2 supports a wider range including higher ±6 V rails. |
| Quiescent Current (per amplifier) | 0.5 mA | 1.1 mA | Lower quiescent current reduces power consumption; the ADA4805-2 is better suited for power-sensitive designs. |
| Slew Rate | 160 V/µs | 12 V/µs | Slew rate limits large-signal dynamic response; the ADA4805-2 handles much faster transients. |
| Input Offset Voltage (max) | 125 µV | 110 µV | Offset voltage affects DC accuracy; both are precision-grade, with the ADA4841-2 slightly tighter. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Identical package and pinout allow drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both cover the industrial/extended range, so thermal compatibility is maintained. |
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 | ADA4841-2YRMZ | ADA4805-2ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | General Purpose | Voltage Feedback |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 13V/µs | 250V/µs |
| -3 dB Bandwidth | 80 MHz | 120 MHz |
| Current - Input Bias | 3 µA | 550 nA |
| Voltage - Input Offset | 40 µV | 13 µV |
| Supply Current | 1.2mA (x2 Channels) | 570µA (x2 Channels) |
| Current - Output / Channel | 60 mA | 73 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 12 V | 10 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 ADA4805-2ARMZ and ADA4841-2YRMZ operational amplifiers?
The ADA4805-2ARMZ is a dual, low-power, rail-to-rail output amplifier with a 105 MHz gain bandwidth product and 160 V/µs slew rate, while the ADA4841-2YRMZ is a dual, low-noise, low-distortion amplifier with 80 MHz bandwidth and 13 V/µs slew rate. The ADA4805-2ARMZ is optimized for low power consumption (500 µA per amplifier), whereas the ADA4841-2YRMZ is optimized for low voltage noise (2.1 nV/√Hz) and low harmonic distortion.
Are the ADA4805-2ARMZ and ADA4841-2YRMZ pin-compatible?
Both devices are offered in 8-lead MSOP (RM) packages with the same pinout: pin 1 and 2 are the outputs, pins 3 and 6 are the inverting inputs, pins 4 and 5 are the non-inverting inputs, pin 7 is V+, and pin 8 is V−. However, designers must verify thermal and layout considerations independently, as the two parts have different power dissipation characteristics.
Which part is better for low-power portable applications?
The ADA4805-2ARMZ is better suited for low-power portable applications. It draws approximately 500 µA per amplifier (1 mA total for the dual) from a 3 V to 10 V supply, whereas the ADA4841-2YRMZ typically draws about 1.1 mA per amplifier. The ADA4805-2ARMZ also offers a disable feature that reduces supply current to approximately 20 µA per amplifier when not in use.
Which part offers lower noise for precision signal conditioning?
The ADA4841-2YRMZ offers significantly lower input voltage noise at 2.1 nV/√Hz at 1 kHz, compared to the ADA4805-2ARMZ at 5.5 nV/√Hz at 100 kHz. For precision, low-noise signal chains such as ADC drivers and instrumentation front ends, the ADA4841-2YRMZ is the more appropriate choice.
What are the supply voltage ranges for these two amplifiers?
The ADA4805-2ARMZ operates from a single supply of 3 V to 10 V (or dual ±1.5 V to ±5 V). The ADA4841-2YRMZ operates from a single supply of 2.7 V to 12 V (or dual ±1.35 V to ±6 V). Both are rail-to-rail output amplifiers, but their input common-mode ranges differ and should be checked against the respective datasheets for the target application.
Can the ADA4805-2ARMZ and ADA4841-2YRMZ be used interchangeably in an existing design?
They should not be treated as drop-in replacements without validation. Although they share the same 8-lead MSOP package and pinout, their bandwidth, slew rate, noise, supply current, and input bias current differ substantially. Circuit performance such as stability, settling time, and distortion must be re-verified against the manufacturer datasheets before substitution.
Which part is more suitable for driving high-speed ADCs?
The ADA4841-2YRMZ is specifically characterized as a low-power, low-noise, low-distortion amplifier well suited for driving 16-bit ADCs, with low harmonic distortion and 2.1 nV/√Hz noise. The ADA4805-2ARMZ, with its higher 105 MHz bandwidth and 160 V/µs slew rate, is better suited for higher-speed, lower-resolution signal chains where power efficiency is prioritized over noise and distortion performance.