Part A
AD8616ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3647 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD8616ARMZ and AD8611ARM-R2 are not drop-in replacements for one another. The AD8616ARMZ is a dual precision CMOS operational amplifier, while the AD8611ARM-R2 is a single high-speed comparator. Their fundamental functions, channel counts, output characteristics, and package pinouts differ, so substituting one for the other requires circuit redesign and cannot be treated as a direct swap.
Different device function
Different channel count
Different output type
Different pinout
Parts at a glance
Part B
AD8611ARM-R2
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5026 PCS
- Package
- TSSOP-8
- Series
- Linear - Comparatores
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8616ARMZ | AD8611ARM-R2 | Why it matters |
|---|---|---|---|
| Amplifier Type | CMOS, Rail-to-Rail Input/Output Operational Amplifier | High-Speed Comparator | An op-amp and a comparator serve fundamentally different functions; they are not direct substitutes in a circuit. |
| Number of Channels | 2 | 1 | Channel count determines how many independent signal paths can be processed per package. |
| Supply Voltage Range | 2.7 V to 5.5 V | 3 V to 5 V | The supply range must match the system rail voltages for the device to operate correctly. |
| Gain Bandwidth / Speed | 24 MHz gain bandwidth product | 100 MHz (comparator propagation delay 4 ns typical) | Bandwidth and speed determine the maximum signal frequency the device can handle accurately. |
| Input Offset Voltage | 65 µV maximum | 3.5 mV maximum | Lower offset voltage improves DC accuracy in precision signal chains. |
| Output Type | Rail-to-Rail | Complementary (CMOS/TTL compatible) | Output swing and logic compatibility affect interfacing with downstream stages. |
| Package / Mounting | 8-Lead MSOP, Surface Mount | 8-Lead MSOP, Surface Mount | Package footprint compatibility is required for drop-in board replacement. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The temperature range must cover the application's environmental conditions. |
| Quiescent Supply Current | 1.7 mA typical per amplifier | 4.5 mA typical | Quiescent current impacts power budget, especially in portable or low-power designs. |
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 | AD8616ARMZ | AD8611ARM-R2 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | - | with Latch |
| Number of Elements | - | 1 |
| Output Type | Rail-to-Rail | Complementary, TTL |
| Voltage - Supply, Single/Dual (±) | - | 3V ~ 5V |
| Voltage - Input Offset (Max) | - | 7mV @ 5V |
| Current - Input Bias(Max) | - | 6µA @ 5V |
| Current - Quiescent (Max) | - | 10mA, 4mA |
| CMRRPSRR(Typ) | - | 85dB CMRR, 73dB PSRR |
| Propagation Delay(Max) | - | 5.5ns |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Series | DigiTrim® | - |
| Amplifier Type | CMOS | - |
| Number of Circuits | 2 | - |
| Slew Rate | 12V/µs | - |
| Gain Bandwidth Product | 24 MHz | - |
| Current - Input Bias | 0.2 pA | - |
| Voltage - Input Offset | 23 µV | - |
| Supply Current | 1.7mA (x2 Channels) | - |
| Current - Output / Channel | 150 mA | - |
| Voltage - Supply Span(Min) | 2.7 V | - |
| Voltage - Supply Span(Max) | 5 V | - |
Frequently asked questions
What are the fundamental differences between the AD8616ARMZ and the AD8611ARM-R2?
The AD8616ARMZ is a dual, precision, low-noise, CMOS operational amplifier specified for 2.7 V to 5 V operation, supplied in an 8-lead MSOP (RM) package. The AD8611ARM-R2 is a single, ultrafast comparator with complementary outputs, specified for 5 V operation, supplied in an 8-lead MSOP (RM) package and shipped on tape and reel. They are functionally different device classes (op amp versus comparator) and are not interchangeable.
Can the AD8616ARMZ be used as a direct replacement for the AD8611ARM-R2?
No. The AD8616ARMZ is a dual operational amplifier, while the AD8611ARM-R2 is a single high-speed comparator with complementary outputs. Their internal functions, pin assignments, and output structures differ, so one cannot directly replace the other without redesign and validation.
Do the AD8616ARMZ and AD8611ARM-R2 share the same package and pinout?
Both devices are offered in an 8-lead MSOP (RM) package, but their pin functions are not identical because one is a dual op amp and the other is a single comparator with complementary outputs. PCB land patterns may be similar, but pin assignments must be verified against the respective datasheets before any layout reuse.
What are the supply voltage requirements for each device?
The AD8616ARMZ is specified for operation from 2.7 V to 5 V single supply. The AD8611ARM-R2 is specified for 5 V operation. Designs must confirm the actual supply rail against the manufacturer datasheet for the exact grade and conditions used.
How do the output characteristics of the AD8616ARMZ and AD8611ARM-R2 differ?
The AD8616ARMZ provides rail-to-rail CMOS amplifier outputs intended for analog signal conditioning. The AD8611ARM-R2 provides complementary digital outputs (Q and Q-bar) intended for high-speed comparison and logic interfacing. The output types serve different signal-chain roles and are not equivalent.
Which device is appropriate for precision analog signal conditioning versus high-speed threshold detection?
The AD8616ARMZ, as a precision low-noise CMOS op amp, is suited to analog signal conditioning such as filtering, buffering, and amplification. The AD8611ARM-R2, as an ultrafast comparator, is suited to high-speed threshold detection and conversion of analog levels to digital logic. Selection should follow the datasheet specifications for the target application.
Are the AD8616ARMZ and AD8611ARM-R2 available in the same packaging format?
Both are available in the 8-lead MSOP (RM) package. The AD8611ARM-R2 suffix indicates tape-and-reel shipment, while the AD8616ARMZ is supplied in the standard manufacturer packaging for that orderable part number. Buyers should confirm the exact packaging and orderable part number with an authorized distributor.