AD4084 - 16-Bit 20 MSPS SAR ADC | Analog Devices
料号： AD4084 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $31.68 | $31.68 |
| 10 | $29.5 | $295.00 |
| 100 | $27 | $2,700.00 |
| 500 | $24.5 | $12,250.00 |
| 1,000 | $22 | $22,000.00 |
AD4084 概述
A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input into a digital output. It typically offers high resolution, low power consumption, and fast conversion times, making it ideal for applications requiring a balance between speed and precision. The AD4084 belongs to the ADC family, which falls under data converters, a subset of analog-to-digital converters, and ultimately within the broader category of mixed-signal integrated circuits.
Key features of the AD4084 include 16-bit resolution, a 20 MSPS sampling rate, and a differential input structure that reduces common-mode noise. The Easy Drive technology minimizes input-dependent signal currents, reducing converter-induced settling artifacts and enabling simpler driver circuitry. The device also integrates digital filtering, which enhances dynamic range and simplifies post-processing. With a 1ku list price starting at $31.68, it offers a cost-effective solution for high-performance data acquisition.
Technically, the AD4084 employs a precision SAR architecture with an internal reference and track-and-hold circuit, achieving high linearity and low noise. The differential input provides excellent common-mode rejection, while the Easy Drive input structure reduces the need for external high-bandwidth drivers, lowering system power and complexity. The device operates from a single supply and supports a wide input range, making it versatile for various signal levels.
Typical applications include industrial process control, medical imaging, communications infrastructure, and test and measurement equipment. In these systems, the AD4084's combination of speed, resolution, and low noise ensures accurate digitization of fast, small-amplitude signals. Its Easy Drive feature is particularly beneficial in multi-channel systems where channel density and power efficiency are critical.
When designing with the AD4084, ensure proper decoupling of the power supply and reference pins, and consider the input drive requirements to fully exploit the Easy Drive benefits. The differential input should be driven with a low-impedance source to maintain performance. Additionally, the digital interface should be isolated from noisy logic to prevent coupling into the analog section.
直接替换替代料： AD4084 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
AD4080BBCZ
✅ 直接替换📋 参考替代料（不在目录中）
AD4082BBCZ
✅ 直接替换📋 参考替代料（不在目录中）
AD4084 最大额定值与电气特性
| 分辨率 | 16 Bit |
| 采样率 | 20 MSPS |
| Input Type | Differential |
| Number of Inputs | 1 |
| Architecture | SAR |
| 封装 | 49-CSPBGA (5x5 mm) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
AD4084 引脚配置
| 引脚 A1 | VIN+ — Positive differential analog input |
| 引脚 A2 | VIN- — Negative differential analog input |
| 引脚 A3 | REF — Voltage reference input |
| 引脚 B1 | AVDD — Analog power supply |
| 引脚 B2 | AVSS — Analog ground |
| 引脚 C1 | DVDD — Digital power supply |
| 引脚 C2 | DGND — Digital ground |
| 引脚 D1 | SCLK — Serial clock input |
| 引脚 D2 | SDI — Serial data input |
| 引脚 E1 | SDO — Serial data output |
| 引脚 E2 | CS — Chip select (active low) |
| 引脚 F1 | CNV — Convert input |
典型应用
AD4084 适用于 6 应用s: Industrial Process Control, Medical Imaging, Communications Infrastructure, Test and Measurement, Aerospace and Defense, Data Acquisition Systems.
Industrial Process Control
The AD4084's 16-bit resolution and 20 MSPS sampling rate enable precise monitoring and control of industrial processes. Its Easy Drive technology reduces signal chain complexity, allowing direct connection to sensors with minimal external components. The differential input rejects common-mode noise, ensuring accurate readings in electrically noisy factory environments. With low power consumption, it supports high channel density in distributed control systems, making it ideal for PLCs and data acquisition modules.
推荐
Medical Imaging
In medical imaging systems like ultrasound and MRI, the AD4084 provides high-speed, low-noise conversion of analog signals. Its 16-bit resolution captures fine details, while the 20 MSPS rate handles fast-moving signals. The Easy Drive input reduces the need for high-bandwidth drivers, lowering system power and heat. The differential input improves common-mode rejection, which is critical in the presence of strong electromagnetic interference from imaging equipment. This makes the AD4084 suitable for portable and high-performance medical devices.
推荐
Communications Infrastructure
The AD4084 is well-suited for communications systems such as base stations and software-defined radios. Its 20 MSPS sampling rate supports IF sampling, while the 16-bit resolution provides high dynamic range for weak signal detection. The Easy Drive technology simplifies the interface to mixers and amplifiers, reducing component count. The device's low distortion ensures signal integrity in dense spectral environments. With its small CSPBGA package, it fits into compact radio front-ends, enabling higher channel density.
推荐
Test and Measurement
For oscilloscopes, spectrum analyzers, and data acquisition systems, the AD4084 offers the speed and precision needed for accurate waveform capture. Its 16-bit resolution and 20 MSPS rate allow detailed analysis of transient signals. The Easy Drive input reduces settling artifacts, ensuring faithful reproduction of fast edges. The differential input supports balanced measurements, reducing noise pickup. The device's low power consumption is beneficial for portable test equipment, extending battery life.
推荐
Aerospace and Defense
In radar, electronic warfare, and guidance systems, the AD4084 provides reliable high-speed conversion in harsh environments. Its 16-bit resolution and 20 MSPS rate support wideband signal processing. The Easy Drive technology reduces power consumption, critical for airborne platforms. The differential input offers good common-mode rejection, essential in high-vibration and EMI-prone environments. The device's compact package allows integration into space-constrained avionics modules.
推荐
Data Acquisition Systems
The AD4084 is ideal for general-purpose data acquisition systems requiring high speed and precision. Its 16-bit resolution and 20 MSPS sampling rate enable accurate digitization of a wide range of signals. The Easy Drive input simplifies the analog front-end, reducing design time and cost. The device's low noise and distortion ensure high fidelity in measurement applications. With its small package, it is suitable for compact DAQ modules used in laboratory and field applications.
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推荐产品汇总
工程参考数据： AD4084 ——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 | AD4080BBCZ | AD4082BBCZ | AD7980BRMZ |
|---|---|---|---|---|
| Package | 49-CSPBGA (5x5 mm) | 49-CSPBGA (5x5 mm) - same | 49-CSPBGA (5x5 mm) - same | MSOP-10 - different |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 Bit | 16 Bit | 16 Bit | 16 Bit |
| Input Type | Differential | Differential | Differential | Pseudo-differential |
| Architecture | SAR | SAR | SAR | SAR |
| Easy Drive | Yes | Yes | Yes | No |
| Integrated Digital Filter | Yes | Yes | Yes | No |
关键差异点
- Easy Drive technology reduces input drive requirements （对比 AD7980BRMZ)
- Higher sampling rate of 20 MSPS （对比 AD7980BRMZ)
- Integrated digital filtering （对比 AD7606BSTZ)
设计说明
Ensure clean power supplies for AVDD and DVDD. Use low-ESR ceramic capacitors (e.g., 0.1 uF and 10 uF) placed close to the power pins to decouple high-frequency noise. A ferrite bead in series with the supply can further isolate the ADC from digital switching noise.
For optimal performance, route the differential analog inputs as a controlled-impedance pair with a solid ground plane beneath. Keep the reference and input traces short and shielded from digital signals. Use a ground plane to minimize noise coupling. The CSPBGA package requires careful thermal management; ensure adequate vias for heat dissipation.
Avoid driving the analog inputs with high-impedance sources, as this can cause settling errors. Use a low-impedance driver or an op-amp buffer. Also, ensure the reference voltage is stable and well-filtered. Incorrect power sequencing can damage the device; follow the recommended power-up sequence in the datasheet.
合规信息
RoHS compliance is indicated by the 'Z' suffix in the part number AD4084BBCZ. Other compliance details are not specified in the provided data.