ADA4805-2ARMZ - Dual 105MHz Low Power Op Amp | Analog Devices
MPN: ADA4805-2ARMZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.79 | $3.79 |
| 10 | $3.45 | $34.50 |
| 100 | $2.98 | $298.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.4 | $2,400.00 |
Drop-in alternatives for ADA4805-2ARMZ — 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:
ADA4805-2TRMZ-EP
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4805-2ARMZ-R7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4805-2TRMZ-EPR7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4807-2ARMZ
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ADA4805-2ARMZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Amplifier Type | Voltage Feedback |
| Bandwidth (-3dB) | 105 MHz |
| Slew Rate | 225 V/µs |
| Quiescent Current per Amplifier | 500 µA |
| Supply Voltage Range (Dual) | ±1.5 V to ±5 V |
| Supply Voltage Range (Single) | 3 V to 5 V |
| Input Voltage Noise | 3.1 nV/√Hz |
| Offset Voltage Drift | 0.2 µV/°C |
| Output Type | Rail-to-Rail |
| Package | 8-MSOP |
| Operating Temperature Range | -40°C to +125°C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 1 |
ADA4805-2ARMZ Pin Configuration
| Pin 1 | OUT1 — Output of amplifier 1 |
| Pin 2 | -IN1 — Inverting input of amplifier 1 |
| Pin 3 | +IN1 — Non-inverting input of amplifier 1 |
| Pin 4 | V- — Negative supply voltage |
| Pin 5 | +IN2 — Non-inverting input of amplifier 2 |
| Pin 6 | -IN2 — Inverting input of amplifier 2 |
| Pin 7 | OUT2 — Output of amplifier 2 |
| 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 is suitable for 6 applications: Portable Instrumentation, Battery-Powered Medical Devices, ADC Driver Circuits, Active Filters, High-Speed Data Acquisition, Test and Measurement Equipment.
Portable Instrumentation
The ADA4805-2ARMZ'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 portable instruments. Its 105 MHz bandwidth and rail-to-rail output ensure accurate signal conditioning in handheld multimeters, data loggers, and portable medical devices. The low noise of 3.1 nV/√Hz preserves signal integrity in precision measurement circuits. With an MSOP-8 package, it saves board space in compact designs. The amplifier can drive high-resolution ADCs directly, reducing component count and power consumption in portable systems.
Recommended
Battery-Powered Medical Devices
In battery-powered medical devices such as glucose monitors and wearable health trackers, the ADA4805-2ARMZ provides high-speed signal conditioning with minimal power consumption. Its 500 µA quiescent current extends battery life, while the 105 MHz bandwidth supports fast signal processing for ECG and EEG signals. The rail-to-rail output maximizes dynamic range in single-supply 3 V systems. The low offset drift of 0.2 µV/°C ensures accurate measurements over temperature. The MSOP-8 package is suitable for compact medical device PCBs. The amplifier's low noise is critical for detecting weak biomedical signals.
Recommended
ADC Driver Circuits
The ADA4805-2ARMZ is an excellent choice for driving high-resolution ADCs in data acquisition systems. Its 105 MHz bandwidth and 225 V/µs slew rate allow it to settle quickly for accurate sampling. The low output impedance and rail-to-rail output ensure full-scale signal swing to the ADC input. The low noise of 3.1 nV/√Hz minimizes noise contribution to the conversion. The amplifier can drive capacitive loads up to 100 pF, making it stable with ADC input capacitance. In multi-channel systems, the dual-channel configuration saves space and power. The wide supply range accommodates various ADC supply voltages.
Recommended
Active Filters
The ADA4805-2ARMZ is well-suited for active filter designs in communication and instrumentation systems. Its 105 MHz bandwidth allows implementation of high-frequency filters with minimal phase error. The low quiescent current makes it efficient for multi-stage filters. The rail-to-rail output enables large signal swings without clipping. The low input voltage noise ensures a clean signal path. The amplifier's high slew rate of 225 V/µs prevents distortion in fast-moving signals. With dual channels, it can implement second-order filters in a single package. The MSOP-8 package is ideal for compact filter modules.
Recommended
High-Speed Data Acquisition
In high-speed data acquisition systems, the ADA4805-2ARMZ provides the necessary bandwidth and low power to condition signals before digitization. Its 105 MHz bandwidth supports sampling rates up to several MSPS. The low noise and low distortion preserve signal fidelity. The rail-to-rail output maximizes the ADC's dynamic range. The amplifier's fast settling time ensures accurate conversion in multiplexed systems. The dual-channel configuration allows simultaneous sampling of two signals. The wide supply range from ±1.5 V to ±5 V provides flexibility in system design. The MSOP-8 package is suitable for dense PCB layouts.
Recommended
Test and Measurement Equipment
The ADA4805-2ARMZ is ideal for test and measurement equipment such as oscilloscopes, spectrum analyzers, and signal generators. Its 105 MHz bandwidth and 225 V/µs slew rate enable accurate reproduction of high-frequency waveforms. The low noise of 3.1 nV/√Hz ensures precise measurements. The rail-to-rail output allows full-scale signal generation. The low quiescent current reduces heat generation in benchtop instruments. The dual-channel configuration is useful for differential measurements. The wide supply range accommodates various power architectures. The MSOP-8 package is compact for multi-channel instruments.
Recommended
Recommended Products Summary
Engineering reference data for ADA4805-2ARMZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4805-2TRMZ-EP | ADA4805-2ARMZ-R7 | ADA4807-2ARMZ |
|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Bandwidth | 105 MHz | 105 MHz | 105 MHz | 220 MHz |
| Quiescent Current per Amplifier | 500 µA | 500 µA | 500 µA | 1.5 mA |
| Slew Rate | 225 V/µs | 225 V/µs | 225 V/µs | 500 V/µs |
| Input Voltage Noise | 3.1 nV/√Hz | 3.1 nV/√Hz | 3.1 nV/√Hz | 3.1 nV/√Hz |
| Supply Voltage Range | ±1.5 V to ±5 V | ±1.5 V to ±5 V | ±1.5 V to ±5 V | ±1.5 V to ±5 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- Low quiescent current of 500 µA per amplifier (vs ADA4807-2ARMZ)
- 105 MHz bandwidth with low power (vs ADA4807-2ARMZ)
- Enhanced product version available (vs ADA4805-2ARMZ-R7)
Design Notes
The ADA4805-2ARMZ operates from ±1.5 V to ±5 V dual supplies or 3 V to 5 V single supply. Ensure that 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 best performance, use a low-impedance ground plane.
The MSOP-8 package has a thermal resistance of 190°C/W. For high-power applications, ensure adequate copper area on the PCB to dissipate heat. Place the amplifier away from heat sources. Use short traces for input and output to minimize parasitic capacitance and inductance.
Avoid driving capacitive loads greater than 100 pF directly, as this may cause instability. If larger capacitive loads are required, add a series resistor at the output. Also, ensure that the input common-mode voltage does not exceed the specified range, although the device has overvoltage protection.
Compliance Information
RoHS compliant per distributor listings. AEC-Q100 not applicable for this industrial-grade part.
