ADA4666-2ARMZ-RL7 - 18V, 4MHz CMOS RRIO Op Amp | Analog Devices
MPN: ADA4666-2ARMZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.85 | $1,850.00 |
Drop-in alternatives for ADA4666-2ARMZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADA4666-2ARMZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4666-2ARMZ-R7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4666-2ARMZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4661-2ARMZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4661-2ARMZ-R7
✅ Drop-In📋 Reference alternative (not in catalog)
AD8606ARZ
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →ADA4666-2ARMZ-RL7 Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Supply Voltage Range | 3 V to 18 V |
| Supply Current per Amplifier | 725 µA |
| Gain Bandwidth Product | 4 MHz |
| Slew Rate | 1.5 V/µs |
| Input Offset Voltage | 50 µV (typical) |
| Input Bias Current | 1 pA (typical) |
| Rail-to-Rail Input | Yes |
| Rail-to-Rail Output | Yes |
| Capacitive Load Stability | 100 pF |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-MSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Amplifier Type | CMOS |
ADA4666-2ARMZ-RL7 Pin Configuration
| Pin 1 | OUT A — Output of amplifier A |
| Pin 2 | -IN A — Inverting input of amplifier A |
| Pin 3 | +IN A — Non-inverting input of amplifier A |
| Pin 4 | V- — Negative supply voltage |
| Pin 5 | +IN B — Non-inverting input of amplifier B |
| Pin 6 | -IN B — Inverting input of amplifier B |
| Pin 7 | OUT B — Output of amplifier B |
| Pin 8 | V+ — Positive supply voltage |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADA4666-2ARMZ-RL7 is suitable for 6 applications: Battery-Powered Instrumentation, Portable Medical Devices, Sensor Signal Conditioning, Active Filters, Industrial Process Control, Automotive Electronics.
Battery-Powered Instrumentation
The ADA4666-2ARMZ-RL7's low supply current of 725 µA and wide supply range of 3 V to 18 V make it ideal for battery-powered instruments. It can operate directly from a 3.3 V or 5 V rail, and its rail-to-rail input/output maximizes dynamic range. The low offset voltage of 50 µV ensures accurate measurement in portable data loggers and handheld multimeters. Its 4 MHz bandwidth supports signal conditioning of sensor outputs without excessive power drain, extending battery life in remote monitoring systems.
Recommended
Portable Medical Devices
In portable medical devices such as glucose monitors and pulse oximeters, the ADA4666-2ARMZ-RL7 provides low-power signal conditioning with high accuracy. Its 3 V to 18 V supply range allows operation from a single lithium-ion cell or two alkaline batteries. The rail-to-rail output ensures full-scale signal swing for ADC interfaces, while the low input bias current of 1 pA minimizes errors when interfacing with high-impedance sensors. The extended temperature range of -40°C to +125°C ensures reliable operation in clinical environments.
Recommended
Sensor Signal Conditioning
The ADA4666-2ARMZ-RL7 is well-suited for conditioning signals from various sensors, including temperature, pressure, and strain gauges. Its CMOS input stage provides high input impedance, minimizing loading on sensor bridges. The low offset voltage and low bias current preserve signal integrity, while the 4 MHz bandwidth allows amplification of dynamic signals. The rail-to-rail output enables direct interface to ADCs without additional level shifting. The wide supply range accommodates both 5 V and 12 V sensor systems.
Recommended
Active Filters
With a gain bandwidth product of 4 MHz, the ADA4666-2ARMZ-RL7 can be used to implement active filters for anti-aliasing and signal reconstruction. Its low supply current makes it suitable for multi-channel filter banks in portable devices. The rail-to-rail input and output allow maximum signal swing, and the low offset voltage ensures DC accuracy in low-frequency filters. The device's stability with capacitive loads up to 100 pF simplifies filter design, and its wide supply range supports both 3.3 V and 5 V logic systems.
Recommended
Industrial Process Control
The ADA4666-2ARMZ-RL7 is suitable for industrial process control applications such as PLC analog input modules and transmitter signal conditioning. Its wide supply range of 3 V to 18 V allows operation from 24 V industrial supplies with proper regulation. The extended temperature range and low offset voltage ensure accurate signal processing in harsh environments. The rail-to-rail output enables direct interface to 5 V ADCs, and the low power consumption reduces heat dissipation in densely populated control cabinets.
Recommended
Automotive Electronics
In automotive electronics, the ADA4666-2ARMZ-RL7 can be used for battery monitoring, motor control signal conditioning, and sensor interfaces. Its wide supply range of 3 V to 18 V covers typical automotive battery voltages, and the extended temperature range of -40°C to +125°C meets AEC-Q100 Grade 1 requirements (though the device itself is not AEC-Q100 qualified). The low supply current is beneficial for always-on modules, and the rail-to-rail output allows direct interface to microcontrollers. The 4 MHz bandwidth supports PWM signal filtering and current sensing applications.
Recommended
Recommended Products Summary
Engineering reference data for ADA4666-2ARMZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4666-2ARMZ-RL | ADA4666-2ARMZ-R7 | ADA4661-2ARMZ-RL | AD8606ARZ |
|---|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage Range | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 2.7 V to 5.5 V |
| Supply Current per Amplifier | 725 µA | 725 µA | 725 µA | 300 µA | 1 mA |
| Gain Bandwidth Product | 4 MHz | 4 MHz | 4 MHz | 2 MHz | 10 MHz |
| Input Offset Voltage | 50 µV | 50 µV | 50 µV | 50 µV | 50 µV |
| Rail-to-Rail Input/Output | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- Wide supply voltage range of 3 V to 18 V (vs AD8606ARZ)
- Lower supply current of 725 µA (vs AD8606ARZ)
- Higher bandwidth of 4 MHz (vs ADA4661-2ARMZ-RL)
Design Notes
The ADA4666-2ARMZ-RL7 operates from 3 V to 18 V. For optimal performance, use a low-impedance power supply and place a 0.1 µF ceramic capacitor close to each supply pin (V+ and V-). For noisy environments, add a 10 µF tantalum capacitor in parallel. Ensure the supply voltage does not exceed the absolute maximum rating of 20 V to prevent damage.
For best performance, place the ADA4666-2ARMZ-RL7 close to the signal source to minimize trace inductance. Use a ground plane to reduce noise and provide a low-impedance return path. Keep feedback resistors and input traces short to minimize parasitic capacitance, which can cause instability. For high-impedance sensors, consider a guard ring around the input pins to reduce leakage currents.
Avoid driving capacitive loads greater than 100 pF directly, as this can cause oscillation. If larger loads are required, add a series resistor (e.g., 50 Ω) at the output. Also, ensure the input common-mode voltage stays within the supply rails; although the device is rail-to-rail, exceeding the rails by more than 0.3 V can damage the input stage. Finally, do not leave unused inputs floating; tie them to a suitable voltage, such as mid-supply.
Compliance Information
RoHS compliance is indicated by the 'Z' in the part number. AEC-Q100 qualification is not specified in the available data.
