ADA4896-2ARMZ-RL7 - Dual Low Noise RRO Op Amp | Analog Devices
MPN： ADA4896-2ARMZ-RL7 ✓ 啟用中ADA4896-2ARMZ-RL7 概覽
What is a voltage feedback amplifier? A voltage feedback amplifier is a type of operational amplifier where the output voltage is fed back to the inverting input through a feedback network. It is characterized by its high input impedance, low output impedance, and high open-loop gain. Voltage feedback amplifiers are widely used in signal conditioning, filtering, and buffering applications due to their ease of use and stability. They form a subset of operational amplifiers, which are fundamental building blocks in analog signal processing.
Key features of the ADA4896-2 include a low 1/f noise of 2.4 nV/√Hz at 10 Hz, a spurious-free dynamic range (SFDR) of -80 dBc at 2 MHz, and a unity-gain bandwidth of 230 MHz. The rail-to-rail output stage allows maximum output swing, and the low quiescent current makes it ideal for battery-powered systems. The amplifier also features a wide supply voltage range and is specified for operation over the industrial temperature range of -40°C to +125°C.
The ADA4896-2 uses a complementary bipolar process technology, providing excellent DC precision and AC performance. The device is designed to drive high-speed ADCs and other capacitive loads, with a slew rate of 120 V/µs. Its low distortion and low noise make it suitable for high-performance signal chains.
Typical applications include ADC drivers, active filters, instrumentation, and portable audio equipment. The low noise and high bandwidth make it ideal for medical imaging, communications, and test and measurement systems.
When designing with the ADA4896-2, ensure proper power supply decoupling with 0.1 µF capacitors close to the supply pins. The rail-to-rail output stage requires careful consideration of the load impedance to maintain stability.
直接替換替代品，適用於 ADA4896-2ARMZ-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： ADA4896-2ARMZ-RL7 （相同外形與佔位） — 差異在於 Slew Rate, Supply Voltage Range, Quiescent Current per Amplifier, Input Bias Current, Input Voltage Noise Density.
ADA4896-2ARMZ-R7
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4896-2ARMZ
✅ 直接替換聯絡詢價
查看資料表 →ADA4897-2ARMZ-RL
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4807-2ARMZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADA4805-2ARMZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADA4806-2ARMZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADA4896-2ARMZ-RL7 最大額定值與電氣特性
| Number of Channels | 2 |
| Amplifier Type | Voltage Feedback |
| 輸出類型 | Rail-to-Rail |
| Supply Voltage Range | 3 V to 10 V (±1.5 V to ±5 V) |
| Quiescent Current per Amplifier | 3 mA |
| 1/f Noise at 10 Hz | 2.4 nV/√Hz |
| Spurious-Free Dynamic Range (SFDR) | -80 dBc at 2 MHz |
| Unity-Gain Bandwidth | 230 MHz |
| Slew Rate | 120 V/µs |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 8-MSOP |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
| Lead-Free | Yes |
ADA4896-2ARMZ-RL7 腳位配置
| 腳位 1 | OUT A — Output of amplifier A |
| 腳位 2 | -IN A — Inverting input of amplifier A |
| 腳位 3 | +IN A — Non-inverting input of amplifier A |
| 腳位 4 | V- — Negative supply voltage |
| 腳位 5 | +IN B — Non-inverting input of amplifier B |
| 腳位 6 | -IN B — Inverting input of amplifier B |
| 腳位 7 | OUT B — Output of amplifier B |
| 腳位 8 | V+ — Positive supply voltage |
典型應用
ADA4896-2ARMZ-RL7 適用於 6 應用s: ADC Driver, Active Filter, Instrumentation, Portable Audio, Communications, Medical Imaging.
ADC Driver
The ADA4896-2ARMZ-RL7 is ideal for driving high-speed ADCs due to its low noise, high bandwidth, and rail-to-rail output. Its SFDR of -80 dBc at 2 MHz ensures minimal distortion, preserving the ADC's dynamic range. The amplifier's low quiescent current is beneficial in multi-channel systems where power dissipation is a concern. When driving capacitive loads, a series resistor may be needed to maintain stability. The wide supply range allows compatibility with various ADC supply voltages.
推薦
Active Filter
The ADA4896-2ARMZ-RL7 is well-suited for active filter applications due to its high unity-gain bandwidth of 230 MHz and low noise. It can be used in low-pass, high-pass, and band-pass filters in communication and instrumentation systems. The rail-to-rail output allows maximum signal swing, and the low quiescent current makes it efficient for battery-powered filters. The amplifier's stability at unity gain simplifies filter design, and its low distortion ensures signal fidelity.
推薦
Instrumentation
In instrumentation, the ADA4896-2ARMZ-RL7 provides low noise and high bandwidth for precise signal conditioning. Its 1/f noise of 2.4 nV/√Hz at 10 Hz is critical for low-frequency measurements, and the wide supply range supports various sensor interfaces. The dual-channel configuration is useful for differential measurements. The amplifier's low power consumption extends battery life in portable instruments, and its small MSOP package saves board space.
推薦
Portable Audio
The ADA4896-2ARMZ-RL7 is suitable for portable audio applications due to its low noise and low power consumption. It can be used in headphone amplifiers, audio codec output buffers, and active filters. The rail-to-rail output maximizes dynamic range, and the low quiescent current extends battery life. The amplifier's high bandwidth ensures accurate reproduction of audio signals, and its small package is ideal for compact devices.
推薦
Communications
In communications systems, the ADA4896-2ARMZ-RL7 is used in IF and baseband signal chains. Its high bandwidth and low distortion support high-speed data transmission, and the low noise improves signal-to-noise ratio. The amplifier can drive mixers, filters, and ADCs in transceivers. The wide supply range allows integration with various RF front-end components, and the low power consumption is advantageous in battery-operated communication devices.
推薦
Medical Imaging
The ADA4896-2ARMZ-RL7 is used in medical imaging equipment such as ultrasound and MRI systems. Its low noise and high bandwidth are essential for processing weak signals from sensors. The amplifier's low power consumption is beneficial in portable medical devices, and its small package allows high-density designs. The wide supply range supports various power architectures, and the rail-to-rail output ensures maximum signal fidelity.
推薦
推薦產品摘要
工程參考資料，適用於 ADA4896-2ARMZ-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 | ADA4896-2ARMZ-R7 | ADA4896-2ARMZ | ADA4897-2ARMZ-RL | ADA4807-2ARMZ-RL7 |
|---|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 2 | 2 | 2 | 2 | 2 |
| 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 |
| Quiescent Current per Amplifier | 3 mA | 3 mA | 3 mA | 3.5 mA | 1 mA |
| 1/f Noise at 10 Hz | 2.4 nV/√Hz | 2.4 nV/√Hz | 2.4 nV/√Hz | 1.8 nV/√Hz | 3.1 nV/√Hz |
| Unity-Gain Bandwidth | 230 MHz | 230 MHz | 230 MHz | 310 MHz | 180 MHz |
| Slew Rate | 120 V/µs | 120 V/µs | 120 V/µs | 170 V/µs | 80 V/µs |
主要差異化特點
- Low quiescent current of 3 mA per amplifier (對比ADA4897-2ARMZ-RL)
- Lower 1/f noise of 2.4 nV/√Hz at 10 Hz (對比ADA4807-2ARMZ-RL7)
- Higher unity-gain bandwidth of 230 MHz (對比ADA4807-2ARMZ-RL7)
設計說明
The ADA4896-2ARMZ-RL7 operates from 3 V to 10 V. Ensure the supply voltage is within this range and properly decoupled. Use 0.1 µF ceramic capacitors close to the V+ and V- pins to minimize noise and improve stability. For optimal performance, a 10 µF tantalum capacitor in parallel is recommended for lower frequency decoupling.
For high-speed applications, place the ADA4896-2ARMZ-RL7 close to the signal source and ADC to minimize trace inductance. Use a ground plane to reduce noise and ensure a low-impedance return path. Keep feedback resistors and capacitors as close to the amplifier as possible to reduce parasitic capacitance and inductance.
The ADA4896-2ARMZ-RL7 is unity-gain stable, but driving large capacitive loads can cause instability. Add a series resistor (e.g., 50 Ω) between the output and the capacitive load to maintain stability. Also, avoid exceeding the absolute maximum supply voltage of 12 V to prevent damage.
合規資訊
RoHS and REACH compliance confirmed from Analog Devices product page. AEC-Q100 not applicable as this is not an automotive-grade part.
