ADA4805-2ARMZ-RL7 - Dual 105MHz Low Power Op Amp | Analog Devices
部品番号: ADA4805-2ARMZ-RL7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 |
ADA4805-2ARMZ-RL7 概要
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in signal conditioning, filtering, and mathematical operations. The ADA4805-2 is a voltage feedback amplifier, a type of op amp that uses a voltage-controlled voltage source topology, providing high bandwidth and low distortion. It belongs to the family of linear integrated circuits, specifically analog signal processing components, which are fundamental building blocks in electronic systems.
Key features include a 105 MHz bandwidth, a slew rate of 225 V/µs, and a low input voltage noise of 7.5 nV/√Hz. The rail-to-rail output stage allows maximum output swing, while the low quiescent current extends battery life in portable applications. The device also features a low offset voltage of 0.2 µV/°C drift, ensuring accuracy over temperature.
The ADA4805-2 utilizes a complementary bipolar process, achieving high speed and low power simultaneously. The amplifier's architecture provides stable operation with capacitive loads, and its wide supply range accommodates various system rails. The low noise and distortion make it suitable for high resolution data conversion systems, where signal integrity is critical.
Typical applications include portable instrumentation, battery-powered equipment, active filters, and analog-to-digital converter (ADC) drivers. The low power consumption and high bandwidth make it ideal for multi-channel systems where power dissipation is a concern. The rail-to-rail output ensures full-scale signal swing, maximizing dynamic range.
When designing with this amplifier, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The input common-mode range extends to the rails, but for best performance, keep inputs within the specified range. The output can drive capacitive loads up to 100 pF without oscillation, but for larger loads, add a series resistor.
ドロップイン代替品: ADA4805-2ARMZ-RL7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADA4805-2ARMZ-RL7 （同一形状・フットプリント） — 相違点: Slew Rate, Supply Voltage Range, Input Offset Voltage, Package, Amplifier Type.
クイック比較ツール — 並列比較する代替部品を選択:
ADA4805-2ARMZ-R7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADA4805-2ARMZ
✅ ドロップイン✓ 在庫あり
$2.4 / 個
データシートを見る →ADA4666-2ARMZ-RL7
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.85 / 個
データシートを見る →ADA4661-2ARMZ-RL7
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.82 / 個
データシートを見る →ADA4528-2ARMZ-RL7
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.19 / 個
データシートを見る →ADA4805-2ARMZ-RL7 最大定格＆電気的特性
| Number of Channels | 2 |
| Amplifier Type | Voltage Feedback |
| 出力タイプ | 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 |
| パッケージ | 8-MSOP |
| 動作温度範囲 | -40°C to +125°C |
| RoHS ステータス | Compliant |
| 実装タイプ | Surface Mount |
ADA4805-2ARMZ-RL7 ピン構成
| ピン 1 | OUT A — Output of amplifier A |
| ピン 2 | -IN A — Inverting input of amplifier A |
| ピン 3 | +IN A — Non-inverting input of amplifier A |
| ピン 4 | V- — Negative supply voltage |
| ピン 5 | +IN B — Non-inverting input of amplifier B |
| ピン 6 | -IN B — Inverting input of amplifier B |
| ピン 7 | OUT B — Output of amplifier B |
| ピン 8 | V+ — Positive supply voltage |
主な用途
ADA4805-2ARMZ-RL7 の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADA4805-2ARMZ-RL7 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 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)
設計ノート
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.
コンプライアンス情報
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
