Part A
ADA4665-2ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3904 ПКС
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Compatible functional replacement candidate
The ADA4665-2ARMZ is a viable functional replacement candidate for the ADA4610-2ARMZ in low-power, low-frequency signal conditioning applications, as both share the same dual op-amp configuration and MSOP-8 package footprint. However, the ADA4610-2ARMZ offers substantially higher gain bandwidth and slew rate, so the ADA4665-2ARMZ should not be substituted in wideband or high-speed signal chains without validating AC performance and dynamic response.
Package Type
High match
Channel Count
High match
Gain Bandwidth Product
Validation required
Slew Rate
Validation required
Parts at a glance
Part B
ADA4610-2ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6414 ПКС
- Package
- MSOP-8
- 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 | ADA4610-2ARMZ | ADA4665-2ARMZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is compatible for direct substitution in dual-channel designs. |
| Input Offset Voltage (max) | 0.3 mV | 1 mV | Lower offset voltage improves DC accuracy; the ADA4610-2 offers tighter precision than the ADA4665-2. |
| Input Bias Current (typ) | 0.5 pA | 1 pA | Very low bias current is critical for high-impedance sensor and photodiode front-ends; both are excellent but differ slightly. |
| Gain Bandwidth Product | 16 MHz | 1.4 MHz | GBW determines achievable closed-loop bandwidth; the ADA4610-2 supports much higher-frequency signal processing. |
| Slew Rate | 25 V/µs | 1 V/µs | Higher slew rate enables faster large-signal response and lower distortion at high frequencies. |
| Supply Voltage Range | ±4.5 V to ±15 V | 4 V to 16 V (or ±2 V to ±8 V) | Operating supply range must match the system rails; the ADA4665-2 supports lower single-supply operation while the ADA4610-2 targets higher-voltage bipolar supplies. |
| Supply Current per Amplifier (typ) | 1.5 mA | 0.35 mA | Quiescent current affects power budget; the ADA4665-2 is significantly more power-efficient for battery-powered designs. |
| Input Voltage Noise Density (1 kHz) | 7.3 nV/√Hz | 22 nV/√Hz | Lower voltage noise improves SNR in precision signal chains; the ADA4610-2 is notably quieter. |
| Rail-to-Rail Input/Output | Rail-to-rail output | Rail-to-rail input and output | RRIO capability allows full supply-range signal swing; the ADA4665-2 offers rail-to-rail inputs, which the ADA4610-2 does not. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Identical package and pinout allow drop-in board replacement without layout changes. |
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 | ADA4665-2ARMZ | ADA4610-2ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | CMOS | J-FET |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 1V/µs | 61V/µs |
| Gain Bandwidth Product | 1.2 MHz | 16.3 MHz |
| Current - Input Bias | 0.1 pA | 5 pA |
| Voltage - Input Offset | 1 mV | 400 µV |
| Supply Current | 290µA (x2 Channels) | 1.6mA (x2 Channels) |
| Current - Output / Channel | 30 mA | 79 mA |
| Voltage - Supply Span(Min) | 5 V | 10 V |
| Voltage - Supply Span(Max) | 16 V | 30 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| -3 dB Bandwidth | - | 9.5 MHz |
Frequently asked questions
What are the primary differences between the ADA4610-2ARMZ and ADA4665-2ARMZ operational amplifiers?
The ADA4610-2ARMZ is a dual, low-noise, low-input-bias-current JFET-input op amp optimized for high DC precision and low noise, while the ADA4665-2ARMZ is a dual, micropower, rail-to-rail input/output CMOS op amp optimized for low supply current and wide supply range. They differ in input stage technology, supply current, noise, and bandwidth, so they are not interchangeable without design validation.
Are the ADA4610-2ARMZ and ADA4665-2ARMZ pin-compatible in the MSOP-8 package?
Both devices are offered in an 8-lead MSOP (RM-8) package with the standard dual op amp pinout, so the package footprint and pin functions are compatible. However, pin compatibility does not guarantee electrical interchangeability; circuit performance must be verified against each datasheet.
How do the supply current requirements of the ADA4610-2ARMZ and ADA4665-2ARMZ compare?
The ADA4665-2ARMZ is a micropower CMOS amplifier with a typical supply current of approximately 145 µA per amplifier, making it suitable for battery-powered and low-power applications. The ADA4610-2ARMZ draws a higher typical supply current of approximately 1.6 mA per amplifier, reflecting its JFET input stage and higher bandwidth.
Which device is better suited for low-noise signal conditioning?
The ADA4610-2ARMZ is the better choice for low-noise signal conditioning. Its datasheet specifies a low input voltage noise density of approximately 8 nV/√Hz at 1 kHz, whereas the ADA4665-2ARMZ has a higher input voltage noise density of approximately 22 nV/√Hz at 1 kHz.
How do the input bias currents of the ADA4610-2ARMZ and ADA4665-2ARMZ differ?
The ADA4610-2ARMZ uses a JFET input stage with a very low typical input bias current of approximately 5 pA at 25°C, making it suitable for high-impedance sensor interfaces. The ADA4665-2ARMZ uses a CMOS input stage with a typical input bias current of approximately 1 pA at 25°C, which is also very low but specified under different test conditions.
What are the supply voltage ranges for the ADA4610-2ARMZ and ADA4665-2ARMZ?
The ADA4610-2ARMZ operates from a dual supply of ±4.5 V to ±15 V (9 V to 30 V total). The ADA4665-2ARMZ operates from a single supply of 2.7 V to 16 V (or equivalent dual supplies), providing rail-to-rail input and output operation for low-voltage systems.
Can the ADA4665-2ARMZ be used as a drop-in replacement for the ADA4610-2ARMZ in an existing design?
No, it should not be treated as a drop-in replacement without full validation. Although both are dual op amps in the same MSOP-8 package, they differ in supply current, noise, bandwidth, input stage technology, and supply voltage range. The circuit must be re-evaluated for stability, noise, power budget, and signal swing against the ADA4665-2ARMZ datasheet.
Which device offers rail-to-rail input and output operation?
The ADA4665-2ARMZ features rail-to-rail input and output operation, allowing its input common-mode range and output swing to extend to both supply rails. The ADA4610-2ARMZ does not provide rail-to-rail input or output; its input common-mode and output swing are limited relative to the supply rails per its datasheet.