ADA4805-2ARMZ-RL7 - Dual 105MHz Low Power Op Amp | Analog Devices
MPN: ADA4805-2ARMZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.79 | $3.79 |
| 10 | $3.41 | $34.10 |
| 100 | $2.73 | $273.00 |
| 500 | $2.32 | $1,160.00 |
| 1,000 | $1.97 | $1,970.00 |
Drop-in alternatives for ADA4805-2ARMZ-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:
ADA4805-2ARMZ-R7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4805-2ARMZ
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →ADA4666-2ARMZ-RL7
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →ADA4661-2ARMZ-RL7
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ADA4528-2ARMZ-RL7
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ADA4805-2ARMZ-RL7 Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Amplifier Type | Voltage Feedback |
| Output Type | Rail-to-Rail |
| Supply Voltage Range (Dual) | ±1.5 V to ±5 V |
| Supply Voltage Range (Single) | 3 V to 5 V |
| Quiescent Current per Amplifier | 500 µA |
| Bandwidth (-3 dB) | 105 MHz |
| Slew Rate | 225 V/µs |
| Input Voltage Noise Density | 7.5 nV/√Hz |
| Offset Voltage Drift | 0.2 µV/°C |
| Output Current | 85 mA |
| Package | 8-MSOP |
| Operating Temperature Range | -40°C to +125°C |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
ADA4805-2ARMZ-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
ADA4805-2ARMZ-RL7 is suitable for 6 applications: Portable Instrumentation, ADC Driver, Active Filters, Battery-Powered Equipment, High-Speed Signal Conditioning, Medical Devices.
Portable Instrumentation
The ADA4805-2ARMZ-RL7's low quiescent current of 500 µA per amplifier and wide supply range from ±1.5 V to ±5 V make it ideal for battery-powered instruments. Its 105 MHz bandwidth ensures accurate signal conditioning in portable multimeters and data loggers. The rail-to-rail output maximizes dynamic range, while the low noise of 7.5 nV/√Hz preserves signal integrity in precision measurements. Designers can use it in active filters and buffer stages, benefiting from its low power consumption to extend battery life.
Recommended
ADC Driver
The ADA4805-2ARMZ-RL7 is well-suited for driving high-resolution ADCs due to its low noise and high bandwidth. Its 105 MHz bandwidth and 225 V/µs slew rate allow it to settle quickly for sampling rates up to several MSPS. The rail-to-rail output ensures full-scale input to the ADC, maximizing dynamic range. The low quiescent current is beneficial in multi-channel systems where multiple drivers are used. The amplifier's low distortion preserves signal fidelity, making it ideal for precision data acquisition systems.
Recommended
Active Filters
The ADA4805-2ARMZ-RL7's high bandwidth and low power make it an excellent choice for active filters in portable devices. Its 105 MHz bandwidth allows implementation of filters up to 10 MHz with good accuracy. The low quiescent current of 500 µA is ideal for battery-powered filters. The rail-to-rail output enables maximum signal swing, and the low noise ensures clean filtering. Designers can use it in Sallen-Key or multiple feedback topologies for anti-aliasing or reconstruction filters.
Recommended
Battery-Powered Equipment
The ADA4805-2ARMZ-RL7 is optimized for battery-powered equipment due to its low quiescent current of 500 µA per amplifier. It operates from a single 3 V or 5 V supply, making it compatible with common battery voltages. The rail-to-rail output allows full use of the supply range, and the low noise ensures accurate signal processing. Its small 8-MSOP package saves board space, and the wide temperature range of -40°C to +125°C suits harsh environments. Applications include portable medical devices, handheld meters, and wireless sensors.
Recommended
High-Speed Signal Conditioning
The ADA4805-2ARMZ-RL7's 105 MHz bandwidth and 225 V/µs slew rate make it suitable for high-speed signal conditioning in video and communication systems. It can buffer and amplify signals up to 10 MHz with minimal distortion. The low quiescent current is advantageous in multi-channel systems, and the rail-to-rail output provides maximum headroom. The amplifier's low noise of 7.5 nV/√Hz ensures signal integrity in sensitive paths. It is ideal for driving cables, filters, and ADCs in high-speed data acquisition.
Recommended
Medical Devices
The ADA4805-2ARMZ-RL7 is suitable for medical devices such as patient monitors and diagnostic equipment due to its low power and low noise. Its 500 µA quiescent current extends battery life in portable monitors, and the low noise of 7.5 nV/√Hz ensures accurate biopotential measurements. The wide supply range accommodates various battery configurations, and the rail-to-rail output maximizes signal range. The small MSOP package is ideal for compact medical devices. The device's reliability over -40°C to +125°C ensures consistent performance.
Recommended
Recommended Products Summary
Engineering reference data for ADA4805-2ARMZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4805-2ARMZ-R7 | ADA4805-2ARMZ | ADA4666-2ARMZ-RL7 | ADA4661-2ARMZ-RL7 | ADA4528-2ARMZ-RL7 |
|---|---|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Bandwidth | 105 MHz | 105 MHz | 105 MHz | 4 MHz | 18 MHz | 6.5 MHz |
| Quiescent Current per Amplifier | 500 µA | 500 µA | 500 µA | 1.2 mA | 1.2 mA | 1.5 mA |
| Slew Rate | 225 V/µs | 225 V/µs | 225 V/µs | 1.2 V/µs | 10 V/µs | 5 V/µs |
| Input Voltage Noise Density | 7.5 nV/√Hz | 7.5 nV/√Hz | 7.5 nV/√Hz | 12 nV/√Hz | 10 nV/√Hz | 5.8 nV/√Hz |
| Offset Voltage Drift | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C | 0.5 µV/°C | 0.5 µV/°C | 0.015 µV/°C |
| Output Current | 85 mA | 85 mA | 85 mA | 30 mA | 30 mA | 50 mA |
Key Differentiators
- Lowest quiescent current in its bandwidth class (vs ADA4666-2ARMZ-RL7)
- Higher bandwidth than pin-compatible alternatives (vs ADA4661-2ARMZ-RL7)
- Higher output current capability (vs ADA4528-2ARMZ-RL7)
Design Notes
The ADA4805-2ARMZ-RL7 operates from ±1.5 V to ±5 V dual supplies or 3 V to 5 V single supply. Ensure the supply voltage is within the specified range to avoid damage. Use 0.1 µF ceramic capacitors close to the V+ and V- pins for decoupling. For single-supply operation, connect V- to ground and ensure the input common-mode range is respected.
For optimal performance, place the ADA4805-2ARMZ-RL7 on a PCB with a solid ground plane. Keep traces short and direct, especially for high-frequency signals. Use surface-mount components to minimize parasitic inductance. The MSOP package has a thermal pad; solder it to a copper pour for better heat dissipation, though power dissipation is low.
Avoid driving capacitive loads greater than 100 pF directly, as this may cause oscillation. If larger loads are required, add a series resistor (e.g., 50 Ω) at the output. Also, ensure the input signals do not exceed the supply rails, as this can cause phase reversal. The ADA4805-2 is not a rail-to-rail input, so keep inputs within the common-mode range.
Compliance Information
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
