Part A
ADA4851-2YRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3931 Stückzahl
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The ADA4851-2YRMZ is a compatible functional replacement candidate for the ADA4841-2YRMZ in many applications, sharing the same dual-channel topology, MSOP-8 package footprint, and supply voltage range. However, the ADA4851-2YRMZ offers lower bandwidth, slew rate, and output current drive, so designs requiring the ADA4841-2YRMZ's higher AC performance and drive capability should be validated before substitution.
Package Type
High match
Channel Count
High match
Supply Voltage Range
Validation required
Bandwidth and Slew Rate
Not compatible
Parts at a glance
Part B
ADA4841-2YRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5986 Stückzahl
- 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 | ADA4841-2YRMZ | ADA4851-2YRMZ | Why it matters |
|---|---|---|---|
| -3 dB Bandwidth | 80 MHz | 130 MHz | Determines the maximum signal frequency the amplifier can handle with acceptable gain; a higher bandwidth supports faster signal processing. |
| Input Voltage Noise Density | 2.1 nV/√Hz | 10 nV/√Hz | Lower noise density improves signal-to-noise ratio in precision and low-level signal applications. |
| Supply Current per Amplifier | 1.1 mA | 2.6 mA | Affects power consumption and thermal budget, critical for portable and power-sensitive designs. |
| Input Offset Voltage (Max) | 0.5 mV | 4 mV | Lower offset voltage reduces DC error, important for precision amplification and sensor interfaces. |
| Slew Rate | 12 V/µs | 170 V/µs | Higher slew rate enables faster large-signal response and better handling of high-frequency, high-amplitude signals. |
| Supply Voltage Range | 2.7 V to 12 V | 2.7 V to 10 V | Defines the allowable power supply window; a wider range offers more flexibility across different system rails. |
| Output Current (Typical) | 30 mA | 55 mA | Determines the amplifier's ability to drive low-impedance loads such as cables or ADC inputs. |
| Gain Bandwidth Product | 80 MHz | 130 MHz | Sets the closed-loop bandwidth achievable at a given gain; higher GBW supports higher gain at wider bandwidths. |
| Number of Amplifiers | 2 | 2 | Dual-channel configuration affects board layout and channel density; matching count ensures pin-compatible substitution. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Identical package ensures footprint compatibility for drop-in replacement on existing PCBs. |
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 | ADA4851-2YRMZ | ADA4841-2YRMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Voltage Feedback | General Purpose |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 375V/µs | 13V/µs |
| Gain Bandwidth Product | 70 MHz | - |
| -3 dB Bandwidth | 105 MHz | 80 MHz |
| Current - Input Bias | 2.2 µA | 3 µA |
| Voltage - Input Offset | 600 µV | 40 µV |
| Supply Current | 2.9mA (x2 Channels) | 1.2mA (x2 Channels) |
| Current - Output / Channel | 83 mA | 60 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 12 V | 12 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 ADA4841-2YRMZ and ADA4851-2YRMZ?
The ADA4841-2YRMZ is a low-power, low-noise, rail-to-rail output dual op amp optimized for precision and low voltage noise (2.1 nV/√Hz at 100 kHz), with a 3 dB bandwidth of 80 MHz and a slew rate of 12 V/µs. The ADA4851-2YRMZ is a low-cost, high-speed, rail-to-rail output dual op amp with a 3 dB bandwidth of 105 MHz and a slew rate of 110 V/µs, but higher voltage noise (10 nV/√Hz at 100 kHz). The ADA4841-2 targets precision signal-chain applications, while the ADA4851-2 targets cost-sensitive, high-speed video and consumer applications.
Are the ADA4841-2YRMZ and ADA4851-2YRMZ pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP (RM) package with identical pin assignments (1: OUT1, 2: −IN1, 3: +IN1, 4: V−, 5: +IN2, 6: −IN2, 7: OUT2, 8: V+). This allows a common PCB footprint, but electrical differences must still be validated before substitution.
How do the supply voltage ranges of the ADA4841-2YRMZ and ADA4851-2YRMZ compare?
The ADA4841-2YRMZ operates from a single supply of 2.7 V to 12 V (or dual supplies of ±1.35 V to ±6 V). The ADA4851-2YRMZ operates from a single supply of 2.7 V to 10 V (or dual supplies of ±1.35 V to ±5 V). The ADA4841-2 therefore supports a slightly higher maximum supply voltage.
Which device has lower input voltage noise, the ADA4841-2YRMZ or the ADA4851-2YRMZ?
The ADA4841-2YRMZ has significantly lower input voltage noise, specified at 2.1 nV/√Hz at 100 kHz. The ADA4851-2YRMZ is specified at 10 nV/√Hz at 100 kHz. For low-noise precision applications, the ADA4841-2 is the appropriate choice.
How do the bandwidth and slew rate of the ADA4841-2YRMZ and ADA4851-2YRMZ differ?
The ADA4841-2YRMZ has a −3 dB bandwidth of 80 MHz and a slew rate of 12 V/µs. The ADA4851-2YRMZ has a −3 dB bandwidth of 105 MHz and a slew rate of 110 V/µs. The ADA4851-2 offers higher speed, making it better suited for high-speed signal processing, while the ADA4841-2 prioritizes precision and low noise.
What are the quiescent current specifications for the ADA4841-2YRMZ and ADA4851-2YRMZ?
The ADA4841-2YRMZ has a typical quiescent current of 1.1 mA per amplifier (2.2 mA total for the dual). The ADA4851-2YRMZ has a typical quiescent current of 2.6 mA per amplifier (5.2 mA total for the dual). The ADA4841-2 is the lower-power option.
Can the ADA4851-2YRMZ be used as a drop-in replacement for the ADA4841-2YRMZ in precision applications?
Not without validation. Although the devices are pin-compatible in the 8-lead MSOP package, the ADA4851-2YRMZ has higher input voltage noise (10 nV/√Hz vs 2.1 nV/√Hz), higher quiescent current, and a lower maximum supply voltage (10 V vs 12 V). These differences can degrade precision, noise performance, and supply headroom, so the substitution must be verified against the target design requirements using the respective manufacturer datasheets.
What are the typical applications for the ADA4841-2YRMZ versus the ADA4851-2YRMZ?
The ADA4841-2YRMZ is typically used in precision instrumentation, low-noise signal conditioning, active filters, and ADC driver applications where low voltage noise and low power are critical. The ADA4851-2YRMZ is typically used in high-speed video processing, consumer electronics, portable media devices, and cost-sensitive high-speed signal chains where bandwidth and slew rate are prioritized over noise.