ADA4897-2ARMZ - Dual Low Noise RRO Op Amp | Analog Devices
料号： ADA4897-2ARMZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.3 | $5.30 |
| 10 | $4.77 | $47.70 |
| 100 | $4.24 | $424.00 |
| 500 | $3.71 | $1,855.00 |
| 1,000 | $3.18 | $3,180.00 |
ADA4897-2ARMZ 概述
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 signal processing, used in applications ranging from signal conditioning to active filtering. The ADA4897-2 belongs to the class of high-speed, low-noise amplifiers, which are essential in precision instrumentation and communication systems where signal integrity is critical.
Key features of the ADA4897-2 include a low input voltage noise of 1 nV/√Hz, a 1/f noise corner of 2.4 nV/√Hz at 10 Hz, and a spurious-free dynamic range (SFDR) of 80 dBc at 2 MHz. The amplifier also provides a bandwidth of 230 MHz and a slew rate of 120 V/µs, enabling fast signal processing. The rail-to-rail output stage maximizes dynamic range, making it ideal for single-supply applications.
The ADA4897-2 uses a voltage feedback architecture with complementary bipolar transistors, achieving low distortion and high linearity. The device is fully specified over the industrial temperature range of -40°C to +125°C. Its low power consumption and high speed make it a versatile choice for battery-powered and high-density systems.
Typical applications include ultrasound equipment, low noise PLL filters, high performance ADC drivers, and high speed signal conditioning. The amplifier's low noise and high bandwidth ensure accurate signal reproduction in these demanding environments.
When designing with the ADA4897-2, proper power supply decoupling is essential to maintain stability and minimize noise. Use 0.1 µF ceramic capacitors close to the supply pins and a 10 µF tantalum capacitor for bulk decoupling. The output can drive capacitive loads up to 100 pF without oscillation, but for larger loads, an isolation resistor may be required.
直接替换替代料： ADA4897-2ARMZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADA4897-2ARMZ （相同外形与封装尺寸） ——差异在于 Slew Rate, Package, Supply Voltage Range, Gain Bandwidth Product, Amplifier Type.
快速对比工具——选择替代料号进行并排对比：
ADA4896-2ARMZ
✅ 直接替换✓ 有现货
$2.25 / 个
查看数据手册 →ADA4807-2ARMZ
✅ 直接替换✓ 有现货
$1.82 / 个
查看数据手册 →ADA4806-2ARMZ
✅ 直接替换✓ 有现货
$1.85 / 个
查看数据手册 →ADA4805-2ARMZ
✅ 直接替换✓ 有现货
$2.4 / 个
查看数据手册 →ADA4666-2ARMZ-RL7
✅ 直接替换✓ 有现货
$1.85 / 个
查看数据手册 →ADA4897-2ARMZ 最大额定值与电气特性
| Number of Channels | 2 |
| Supply Voltage Range | 3 V to 10 V |
| Quiescent Current per Amplifier | 3 mA |
| Input Voltage Noise Density | 1 nV/√Hz |
| 1/f Noise Corner | 2.4 nV/√Hz at 10 Hz |
| Bandwidth | 230 MHz |
| Slew Rate | 120 V/µs |
| Spurious-Free Dynamic Range | 80 dBc at 2 MHz |
| 输出类型 | Rail-to-Rail |
| Input Type | Voltage Feedback |
| 封装 | 10-MSOP |
| 工作温度范围 | -40°C to +125°C |
| RoHS 状态 | Compliant |
| 安装类型 | Surface Mount |
| Settling Time | 45 ns to 0.1% |
ADA4897-2ARMZ 引脚配置
| 引脚 1 | OUT A — Output of amplifier A |
| 引脚 2 | -IN A — Inverting input of amplifier A |
| 引脚 3 | +IN A — Non-inverting input of amplifier A |
| 引脚 4 | V- — Negative supply voltage |
| 引脚 5 | +IN B — Non-inverting input of amplifier B |
| 引脚 6 | -IN B — Inverting input of amplifier B |
| 引脚 7 | OUT B — Output of amplifier B |
| 引脚 8 | V+ — Positive supply voltage |
| 引脚 9 | NC — No connect |
| 引脚 10 | NC — No connect |
典型应用
ADA4897-2ARMZ 适用于 6 应用s: Ultrasound Equipment, Low Noise PLL Filters, High Performance ADC Drivers, High Speed Signal Conditioning, Portable Medical Devices, Communication Systems.
Ultrasound Equipment
The ADA4897-2ARMZ is ideal for ultrasound systems due to its low noise (1 nV/√Hz) and high bandwidth (230 MHz), which are essential for processing high-frequency echo signals with minimal distortion. The dual channel configuration allows for compact front-end designs, and the rail-to-rail output maximizes dynamic range for improved image quality. Its low power consumption (3 mA per channel) is beneficial for portable ultrasound devices.
推荐
Low Noise PLL Filters
In phase-locked loop (PLL) circuits, the ADA4897-2ARMZ provides low noise amplification for loop filter components, ensuring stable and clean frequency synthesis. Its low voltage noise (1 nV/√Hz) minimizes phase noise contribution, while the high bandwidth (230 MHz) supports fast loop dynamics. The rail-to-rail output allows full control voltage swing, and the small MSOP package saves board space in RF modules.
推荐
High Performance ADC Drivers
The ADA4897-2ARMZ is well-suited for driving high-speed ADCs, providing low noise and high bandwidth to preserve signal fidelity. Its low distortion (SFDR 80 dBc at 2 MHz) ensures accurate conversion, and the rail-to-rail output maximizes the ADC input range. The dual channel configuration is ideal for differential driving, and the fast settling time (45 ns) supports high sampling rates.
推荐
High Speed Signal Conditioning
The ADA4897-2ARMZ excels in high speed signal conditioning applications such as video amplification and communication systems. Its 230 MHz bandwidth and 120 V/µs slew rate enable accurate reproduction of fast signals, while the low noise (1 nV/√Hz) preserves signal quality. The rail-to-rail output is beneficial for single-supply systems, and the low power consumption (3 mA) is advantageous for multi-channel designs.
推荐
Portable Medical Devices
The ADA4897-2ARMZ is suitable for portable medical devices due to its low power consumption (3 mA per channel) and small MSOP package. Its low noise (1 nV/√Hz) is critical for accurate biopotential measurements, and the wide supply range (3 V to 10 V) accommodates battery voltages. The rail-to-rail output ensures maximum signal swing, and the high bandwidth supports fast signal acquisition.
推荐
Communication Systems
In communication systems, the ADA4897-2ARMZ provides low noise amplification for IF and baseband signals. Its high SFDR (80 dBc at 2 MHz) ensures low distortion in multi-carrier environments, and the high bandwidth (230 MHz) supports wideband signals. The dual channel configuration is useful for I/Q processing, and the low power consumption is beneficial for high-density line cards.
推荐
推荐产品汇总
工程参考数据： ADA4897-2ARMZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADA4896-2ARMZ | ADA4807-2ARMZ | ADA4806-2ARMZ | ADA4805-2ARMZ |
|---|---|---|---|---|---|
| Package | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage Range | 3 V to 10 V | 3 V to 10 V | 2.7 V to 5 V | 2.7 V to 5 V | 2.7 V to 5 V |
| Quiescent Current per Amplifier | 3 mA | 2.5 mA | 1 mA | 0.8 mA | 0.8 mA |
| Input Voltage Noise Density | 1 nV/√Hz | 1.2 nV/√Hz | 3.1 nV/√Hz | 4.5 nV/√Hz | 4.5 nV/√Hz |
| Bandwidth | 230 MHz | 230 MHz | 180 MHz | 100 MHz | 105 MHz |
| Slew Rate | 120 V/µs | 120 V/µs | 225 V/µs | 150 V/µs | 150 V/µs |
关键差异点
- Lowest input voltage noise in its class （对比 ADA4807-2ARMZ)
- Higher bandwidth （对比 ADA4806-2ARMZ)
- Higher slew rate （对比 ADA4805-2ARMZ)
设计说明
The ADA4897-2ARMZ operates from a 3 V to 10 V supply. Ensure the supply voltage is within this range and adequately decoupled. Use a 0.1 µF ceramic capacitor close to each supply pin and a 10 µF tantalum capacitor for bulk decoupling. This minimizes power supply noise and ensures stable operation.
For optimal performance, place the ADA4897-2ARMZ on a PCB with a solid ground plane. Keep the feedback network components close to the amplifier to minimize parasitic inductance. Use short, direct traces for the input and output connections to reduce noise pickup. The MSOP package has a thermal pad that should be soldered to the ground plane for improved thermal dissipation.
Avoid driving capacitive loads greater than 100 pF directly, as this can cause instability. If a larger capacitive load is required, add an isolation resistor in series with the output. Also, ensure the input common-mode voltage is within the specified range to prevent output phase reversal. Refer to the datasheet for detailed application circuits.
合规信息
RoHS compliant per distributor data. Other compliance information not specified in the provided data.
