ADA4805-1AKSZ - 105MHz Low Power Rail-to-Rail Op Amp | ADI
MPN： ADA4805-1AKSZ ✓ 啟用中ADA4805-1AKSZ 概覽
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used to condition analog signals in applications such as filtering, amplification, and buffering. The ADA4805-1 belongs to the class of rail-to-rail output amplifiers, which can swing its output very close to the supply rails, maximizing dynamic range in low-voltage systems. As a voltage feedback amplifier, it offers stable operation with resistive feedback networks and is widely used in signal conditioning chains, from sensors to ADCs.
Key features of the ADA4805-1 include a low input offset voltage of 0.2 µV/°C drift, a high slew rate of 170 V/µs, and a low input voltage noise of 7 nV/√Hz. The rail-to-rail output stage ensures maximum output swing, while the low quiescent current extends battery life in portable instruments. The amplifier also features a wide supply range, making it suitable for both 3 V and 5 V systems, and it is fully specified over the industrial temperature range of -40°C to +125°C.
Technically, the ADA4805-1 uses a complementary bipolar process that achieves a good balance between speed and power consumption. The 105 MHz bandwidth and 170 V/µs slew rate enable it to handle fast signals, while the 500 µA quiescent current is exceptionally low for this performance class. The device also includes internal ESD protection and is available in lead-free, RoHS-compliant packages.
Typical applications include portable instrumentation, battery-powered medical devices, active filters, and ADC driver circuits. In these applications, the ADA4805-1 provides the necessary bandwidth and precision while minimizing power drain. For example, in a 16-bit SAR ADC driver, the low noise and high slew rate ensure accurate settling, while the rail-to-rail output maximizes the ADC's input range.
When designing with the ADA4805-1, ensure proper power supply decoupling with 0.1 µF capacitors close to the supply pins. The SC70 package has a thermal resistance of approximately 200°C/W, so consider power dissipation in high-temperature environments. For best performance, use a solid ground plane and keep feedback paths short to minimize parasitic capacitance.
直接替換替代品，適用於 ADA4805-1AKSZ — 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 （相同外形與佔位） — 差異在於 Slew Rate, Amplifier Type, Gain Bandwidth Product, Current - Input Bias, Current - Output / Channel.
ADA4805-1AKSZ-R2
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4805-1AKSZ-R7
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4807-1AKSZ-R2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD8615AKSZ-R2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADA4805-1AKSZ 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 |
| Slew Rate | 170 V/µs |
| Gain Bandwidth Product | 105 MHz |
| Current - Input Bias | 0.6 µA |
| Voltage - Input Offset | 0.2 µV/°C drift |
| Current - Supply | 500 µA |
| Current - Output / Channel | 30 mA |
| Voltage - Supply Span (Min) | 3 V |
| Voltage - Supply Span (Max) | 10 V |
| 工作溫度 | -40°C to +125°C |
| 封裝 / 外殼 | SC-70-6 |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ADA4805-1AKSZ 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 適用於 6 應用s: Portable Instrumentation, Battery-Powered Medical Devices, Active Filters, ADC Driver Circuits, Video Signal Processing, Industrial Control Systems.
Portable Instrumentation
The ADA4805-1AKSZ's low quiescent current of 500 µA and wide supply range make it ideal for battery-powered instruments. Its 105 MHz bandwidth ensures accurate signal conditioning for sensors and transducers, while the rail-to-rail output maximizes dynamic range in 3 V systems. The small SC70 package saves board space in handheld devices.
推薦
Battery-Powered Medical Devices
In medical devices like glucose monitors and pulse oximeters, power efficiency is critical. The ADA4805-1AKSZ consumes only 500 µA, extending battery life. Its low offset drift (0.2 µV/°C) ensures accurate signal processing over temperature variations. The rail-to-rail output allows full-scale signals to be digitized by ADCs without additional gain stages.
推薦
Active Filters
The ADA4805-1AKSZ's 105 MHz bandwidth and 170 V/µs slew rate make it suitable for active filters in communication and audio systems. Its low quiescent current is advantageous in multi-channel filter banks. The rail-to-rail output allows filters to operate at lower supply voltages without clipping, preserving signal integrity.
推薦
ADC Driver Circuits
The ADA4805-1AKSZ is ideal for driving high-resolution ADCs due to its low noise and high slew rate. It can settle quickly to 16-bit accuracy, ensuring accurate conversion. The rail-to-rail output maximizes the ADC's input range, and the low quiescent current reduces thermal drift in precision systems.
推薦
Video Signal Processing
With 105 MHz bandwidth and 170 V/µs slew rate, the ADA4805-1AKSZ can handle composite video signals. Its low power consumption is beneficial in portable video equipment. The rail-to-rail output ensures full video swing, and the small SC70 package is ideal for compact camera modules.
推薦
Industrial Control Systems
The ADA4805-1AKSZ operates over -40°C to +125°C, making it suitable for industrial environments. Its wide supply range (3 V to 10 V) allows use in 24 V systems with proper regulation. The low offset drift ensures accurate process control, and the rail-to-rail output interfaces directly with ADCs in PLCs and sensors.
推薦
推薦產品摘要
工程參考資料，適用於 ADA4805-1AKSZ — 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 | ADA4805-1ARJZ-R7 | ADA4805-1AKSZ-R2 | ADA4807-1AKSZ-R2 | AD8615AKSZ-R2 |
|---|---|---|---|---|---|
| Package | SC-70-6 | SOT-23-6 | SC-70-6 | SC-70-6 | SC-70-6 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Gain Bandwidth Product | 105 MHz | 105 MHz | 105 MHz | 130 MHz | 24 MHz |
| Quiescent Current | 500 µA | 500 µA | 500 µA | 1 mA | 1.7 mA |
| Slew Rate | 170 V/µs | 170 V/µs | 170 V/µs | 220 V/µs | 12 V/µs |
| Input Offset Drift | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C | 0.5 µV/°C |
| Supply Voltage Range | 3 V to 10 V | 3 V to 10 V | 3 V to 10 V | 3 V to 10 V | 2.7 V to 5 V |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
主要差異化特點
- Lowest quiescent current in its class (對比ADA4807-1AKSZ-R2)
- Higher bandwidth than AD8615 (對比AD8615AKSZ-R2)
- Lower offset drift than AD8615 (對比AD8615AKSZ-R2)
設計說明
The ADA4805-1AKSZ operates from 3 V to 10 V supplies. Use 0.1 µF ceramic capacitors close to the V+ and V- pins for decoupling. For single-supply operation, ensure the input common-mode range is not exceeded; the device is not rail-to-rail input, so keep inputs within the specified range.
The SC70-6 package has a thermal resistance of approximately 200°C/W. For high-power applications, ensure adequate copper area on the PCB to dissipate heat. Keep traces short to minimize parasitic capacitance, which can affect high-frequency performance.
Do not exceed the absolute maximum supply voltage of 12 V. The output can swing close to the rails but not exactly to them; leave headroom for load conditions. Also, avoid driving capacitive loads greater than 100 pF without a series resistor, as this can cause instability.
合規資訊
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
