ADA4805-1AKSZ-RL7 - 105MHz Low Power Rail-to-Rail Op Amp | ADI
MPN： ADA4805-1AKSZ-RL7 ✓ 啟用中ADA4805-1AKSZ-RL7 概覽
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block in analog electronics, used in signal conditioning, filtering, and amplification. The ADA4805-1 belongs to the class of high-speed, low-power op amps, which balance bandwidth and power consumption for portable instrumentation and data acquisition systems.
Key features include a low input offset voltage of 0.2 µV/°C drift, low noise, and rail-to-rail output. The amplifier is designed for low-power, high-resolution data conversion systems, where it can drive ADCs or buffer reference voltages. Its wide bandwidth and low quiescent current make it suitable for battery-operated devices that require both performance and efficiency.
The ADA4805-1 uses a voltage feedback architecture, providing stable operation with a wide range of gain configurations. It is specified for operation over the industrial temperature range of -40°C to +125°C. The SC70-6 package is compact, with a footprint of 2.0 mm × 1.25 mm, enabling high-density PCB layouts.
Typical applications include portable medical devices, battery-powered instrumentation, active filters, and ADC driver circuits. The amplifier's low power consumption extends battery life, while its high bandwidth ensures accurate signal reproduction.
When designing with the ADA4805-1, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The rail-to-rail output stage allows maximum dynamic range, but care must be taken to avoid output saturation when driving low-impedance loads.
直接替換替代品，適用於 ADA4805-1AKSZ-RL7 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADA4805-1AKSZ-RL7 （相同外形與佔位） — 差異在於 Amplifier Type, Gain Bandwidth Product, Current - Supply, Package / Case, Slew Rate.
ADA4805-1AKSZ-R7
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4805-1AKSZ-RL7 最大額定值與電氣特性
| Amplifier Type | General Purpose |
| Number of Circuits | 1 |
| 輸出類型 | Rail-to-Rail |
| Gain Bandwidth Product | 105 MHz |
| Voltage - Input Offset | 0.2 µV/°C drift |
| Current - Supply | 500 µA |
| Voltage - Supply Span (Min) | 3 V |
| Voltage - Supply Span (Max) | 10 V (±5 V) |
| 工作溫度 | -40°C to +125°C |
| 封裝 / 外殼 | SC70-6 |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ADA4805-1AKSZ-RL7 腳位配置
| 腳位 1 | OUT — Output |
| 腳位 2 | V- — Negative supply |
| 腳位 3 | +IN — Non-inverting input |
| 腳位 4 | -IN — Inverting input |
| 腳位 5 | V+ — Positive supply |
| 腳位 6 | NC — No connect |
典型應用
ADA4805-1AKSZ-RL7 適用於 6 應用s: Portable Medical Devices, Battery-Powered Instrumentation, Active Filters, ADC Driver, Audio Signal Conditioning, RF and IF Amplification.
Portable Medical Devices
The ADA4805-1AKSZ-RL7's low quiescent current of 500 µA and wide supply range make it ideal for battery-powered medical devices such as glucose monitors and pulse oximeters. Its high bandwidth of 105 MHz ensures accurate signal amplification for biosensors, while the rail-to-rail output maximizes dynamic range in low-voltage systems. The compact SC70-6 package saves board space in wearable designs.
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Battery-Powered Instrumentation
In portable test equipment, the ADA4805-1AKSZ-RL7 provides high-speed signal conditioning with minimal power drain. Its 105 MHz bandwidth supports fast transient signals, while the 500 µA supply current extends battery life. The amplifier can operate from a single 3 V supply, making it compatible with Li-ion batteries. Its low offset drift ensures measurement accuracy over temperature.
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Active Filters
The ADA4805-1AKSZ-RL7 is well-suited for active filter designs due to its high gain-bandwidth product of 105 MHz and low power consumption. It can implement Butterworth or Chebyshev filters in the MHz range without excessive power dissipation. The rail-to-rail output allows full-scale signal swing, and the low input bias current minimizes filter errors. Its small package enables compact filter modules.
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ADC Driver
The ADA4805-1AKSZ-RL7 can drive high-speed ADCs with its 105 MHz bandwidth and low output impedance. It provides the necessary signal conditioning and buffering to maintain signal integrity. The low quiescent current is beneficial in multi-channel systems where many amplifiers are used. Its wide supply range allows it to interface with various ADC supply voltages.
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Audio Signal Conditioning
With its low noise and high bandwidth, the ADA4805-1AKSZ-RL7 is suitable for audio applications such as headphone amplifiers and microphone preamps. The rail-to-rail output provides maximum headroom, and the low power consumption is ideal for portable audio devices. The small SC70-6 package fits into compact audio modules.
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RF and IF Amplification
The ADA4805-1AKSZ-RL7's 105 MHz bandwidth makes it useful for IF amplification in radio receivers. It can amplify signals up to 105 MHz with low distortion. The low power consumption is beneficial in battery-operated radios. Its wide supply range allows operation from various battery voltages.
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推薦產品摘要
工程參考資料，適用於 ADA4805-1AKSZ-RL7 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADA4805-1AKSZ-R7 | ADA4805-1ARJZ-R7 | ADA4805-2ARMZ-R7 |
|---|---|---|---|---|
| Package | SC70-6 | SC70-6 | SOT-23-6 | MSOP-8 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 1 | 1 | 1 | 2 |
| Gain Bandwidth Product | 105 MHz | 105 MHz | 105 MHz | 105 MHz |
| Supply Current | 500 µA | 500 µA | 500 µA | 1 mA (per amp) |
| Supply Voltage Range | 3 V to 10 V | 3 V to 10 V | 3 V to 10 V | 3 V to 10 V |
| Rail-to-Rail Output | Yes | Yes | Yes | Yes |
| Offset Drift | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C |
主要差異化特點
- Low quiescent current of 500 µA (對比ADA4805-1ARJZ-R7)
- High bandwidth of 105 MHz (對比AD8605AKSZ-REEL7)
- Rail-to-rail output (對比OPA333AIDCKR)
設計說明
The ADA4805-1AKSZ-RL7 operates from a single 3 V to 10 V supply or dual ±1.5 V to ±5 V supplies. Ensure the supply voltage does not exceed the absolute maximum ratings. Use 0.1 µF ceramic capacitors close to the V+ and V- pins for decoupling.
For optimal performance, place the ADA4805-1AKSZ-RL7 close to the signal source and ADC. Keep traces short and use a ground plane to minimize noise. The SC70-6 package has a small footprint; ensure adequate solder pad size for reliable soldering.
Avoid driving capacitive loads directly without a series resistor, as this can cause instability. The rail-to-rail output stage may have limited drive capability; check the datasheet for output current specifications. Also, ensure the input common-mode voltage is within the specified range.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
