ADA4807-2ARMZ - 180MHz Rail-to-Rail Op Amp | Analog Devices
MPN： ADA4807-2ARMZ ✓ 啟用中ADA4807-2ARMZ 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 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.
直接替換替代品，適用於 ADA4807-2ARMZ — 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： ADA4807-2ARMZ （相同外形與佔位） — 差異在於 Slew Rate, Supply Voltage Range, Package, Amplifier Type, Gain Bandwidth Product.
ADA4807-2ARMZ-R7
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4805-2TRMZ-EP
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4897-2ARMZ-RL
✅ 直接替換📋 參考替代品（不在目錄中）
OPA2863A
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA2695
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADA4807-2ARMZ 最大額定值與電氣特性
| 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) |
| 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 |
ADA4807-2ARMZ 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 or ground |
| 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 |
典型應用
ADA4807-2ARMZ 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADA4807-2ARMZ — 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 | 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 |
主要差異化特點
- Lowest noise among high-speed rail-to-rail amplifiers (對比OPA2863A)
- Higher bandwidth than ADA4805-2 (對比ADA4805-2TRMZ-EP)
- Lower power consumption than ADA4897-2 (對比ADA4897-2ARMZ-RL)
設計說明
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.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Halogen-free status not specified in available data.
