ADA4807-2ARMZ - 180MHz Rail-to-Rail Op Amp | Analog Devices
部品番号: ADA4807-2ARMZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
ADA4807-2ARMZ 概要
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 ADA4807-2 is a voltage feedback amplifier, a common topology that offers stable operation with resistive feedback and is well-suited for high-speed signal processing. As a rail-to-rail input/output amplifier, it can handle input voltages that extend to both supply rails and swing its output close to the rails, which is critical in single-supply systems where headroom is limited.
Key features of the ADA4807-2ARMZ include an ultra-low input voltage noise density of 3.1 nV/√Hz and current noise density of 0.7 pA/√Hz, which are among the lowest for high-speed rail-to-rail amplifiers. The device also provides a high slew rate of 225 V/µs, enabling fast signal transitions, and a wide -3 dB bandwidth of 180 MHz for small-signal applications. The amplifier is stable for gains of 1 or greater, and it includes a disable feature that reduces quiescent current to 0.3 µA when the output is placed in a high-impedance state, making it suitable for power-sensitive designs.
Technically, the ADA4807-2 uses a complementary bipolar process that achieves low distortion and high linearity. The input stage employs a rail-to-rail architecture with a common-mode range that includes both rails, while the output stage uses a class-AB configuration to minimize crossover distortion. The device is specified for operation over the extended industrial temperature range of -40°C to +125°C, and it is available in the compact 8-lead MSOP package (ARMZ suffix), which is ideal for space-constrained PCBs.
Typical applications include portable instrumentation, active filters, analog-to-digital converter (ADC) drivers, and buffering in data acquisition systems. The low noise and high bandwidth make it particularly well-suited for driving high-resolution ADCs, such as the AD7980 or AD4000 series, where signal integrity is paramount. In portable devices, the low quiescent current extends battery life, while the rail-to-rail output ensures maximum signal swing.
When designing with the ADA4807-2ARMZ, ensure proper power supply decoupling with 0.1 µF ceramic capacitors placed close to the V+ and V- pins. The disable pin (PD) can be used for power sequencing; applying a voltage 3.4 V below the positive supply enables the device, while pulling it high disables the output. For optimal noise performance, use low-value resistors in the feedback network to minimize thermal noise contribution.
ドロップイン代替品: ADA4807-2ARMZ — 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: ADA4807-2ARMZ （同一形状・フットプリント） — 相違点: Slew Rate, Supply Voltage Range, Package, Amplifier Type, Gain Bandwidth Product.
クイック比較ツール — 並列比較する代替部品を選択:
ADA4807-2ARMZ-R7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADA4805-2TRMZ-EP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADA4897-2ARMZ-RL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA2863A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
OPA2695
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADA4807-2ARMZ 最大定格＆電気的特性
| Number of Channels | 2 |
| Amplifier Type | Voltage Feedback |
| Gain Bandwidth Product | 180 MHz |
| Slew Rate | 225 V/µs |
| Input Voltage Noise Density | 3.1 nV/√Hz |
| Input Current Noise Density | 0.7 pA/√Hz |
| Supply Current per Amplifier | 1 mA |
| Supply Voltage Range (Single) | 2.7 V to 5 V |
| Supply Voltage Range (Dual) | ±1.35 V to ±2.5 V |
| Rail-to-Rail Input/Output | Yes |
| Disable Pin | Yes (active low) |
| 動作温度範囲 | -40°C to +125°C |
| パッケージ | 8-MSOP |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
ADA4807-2ARMZ 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 or ground |
| 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 |
主な用途
ADA4807-2ARMZ の用途: 6 件s: Portable Instrumentation, Active Filters, ADC Driver, Video Signal Processing, Battery-Powered Devices, Test and Measurement.
Portable Instrumentation
The ADA4807-2ARMZ's low quiescent current (1 mA per amp) and rail-to-rail I/O make it ideal for battery-powered handheld meters and data loggers. Its 180 MHz bandwidth ensures accurate amplification of fast sensor signals, while the low noise (3.1 nV/√Hz) preserves signal integrity in precision measurements. The small 8-MSOP package saves board space in compact designs.
おすすめ
Active Filters
With a gain bandwidth product of 180 MHz, the ADA4807-2ARMZ can implement active filters with cutoff frequencies up to tens of MHz. Its low noise and high slew rate (225 V/µs) minimize distortion in filter responses. The rail-to-rail output allows maximum signal swing in single-supply filter designs, making it suitable for anti-aliasing filters in communication systems.
おすすめ
ADC Driver
The ADA4807-2ARMZ is optimized for driving high-resolution ADCs. Its low noise (3.1 nV/√Hz) and high bandwidth (180 MHz) ensure that the ADC's performance is not degraded by the driver. The rail-to-rail output can swing close to the ADC's reference rails, maximizing dynamic range. The disable pin (on LFCSP version) allows power saving between conversions.
おすすめ
Video Signal Processing
The 180 MHz bandwidth and 225 V/µs slew rate of the ADA4807-2ARMZ make it suitable for video buffering and distribution. It can drive coaxial cables with minimal signal degradation, and its low differential gain/phase errors ensure accurate color reproduction. The low power consumption is beneficial in multi-channel video systems.
おすすめ
Battery-Powered Devices
The ADA4807-2ARMZ's 1 mA quiescent current per amplifier extends battery life in portable devices such as medical monitors and wireless sensors. Its rail-to-rail I/O allows operation from a single 3.3 V supply without headroom issues. The small MSOP package is ideal for space-constrained PCBs in wearables and IoT devices.
おすすめ
Test and Measurement
In test equipment, the ADA4807-2ARMZ provides high bandwidth and low noise for signal conditioning in oscilloscopes, spectrum analyzers, and data acquisition systems. Its fast settling time and low distortion ensure accurate measurement of high-frequency signals. The dual-channel configuration saves space in multi-channel instruments.
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: ADA4807-2ARMZ — 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 | ADA4807-2ARMZ-R7 | ADA4805-2TRMZ-EP | ADA4897-2ARMZ-RL | OPA2863A |
|---|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Gain Bandwidth Product | 180 MHz | 180 MHz | 105 MHz | 230 MHz | 90 MHz |
| Input Voltage Noise | 3.1 nV/√Hz | 3.1 nV/√Hz | 4.5 nV/√Hz | 1 nV/√Hz | 4.5 nV/√Hz |
| Supply Current per Amp | 1 mA | 1 mA | 1.1 mA | 3 mA | 1.2 mA |
| Slew Rate | 225 V/µs | 225 V/µs | 120 V/µs | 120 V/µs | 100 V/µs |
| Rail-to-Rail I/O | Yes | Yes | Yes | Yes | Yes |
| Disable Pin | No (MSOP) | No (MSOP) | No | No | No |
主な差別化要因
- Lowest noise among high-speed rail-to-rail amplifiers （vs OPA2863A)
- Higher bandwidth than ADA4805-2 （vs ADA4805-2TRMZ-EP)
- Lower power consumption than ADA4897-2 （vs ADA4897-2ARMZ-RL)
設計ノート
The ADA4807-2ARMZ operates from 2.7V to 5V single supply or ±1.35V to ±2.5V dual supply. Ensure the supply voltage does not exceed the absolute maximum rating of 6V. Use 0.1µF ceramic capacitors close to the V+ and V- pins for decoupling, and a 10µF bulk capacitor for low-frequency stability.
For optimal noise performance, keep the feedback resistors low (e.g., 1kΩ or less) to minimize thermal noise. Place the amplifier close to the signal source and ADC to reduce trace inductance. Use a solid ground plane and avoid routing high-speed digital traces near the analog inputs.
The MSOP package does not include the disable (PD) pin; it is only available on the LFCSP version (ADA4807-2ACPZ). If you need the disable feature, use the LFCSP variant. Also, the ADA4807-2 is not unity-gain stable for gains less than 1; ensure a minimum gain of 1 to avoid oscillation.
コンプライアンス情報
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Halogen-free status not specified in available data.
