AD7986BCPZ - 18-Bit 2 MSPS SAR ADC | Analog Devices
料号： AD7986BCPZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $26.42 | $26.42 |
| 10 | $24.5 | $245.00 |
| 100 | $22 | $2,200.00 |
| 500 | $20 | $10,000.00 |
| 1,000 | $18.5 | $18,500.00 |
AD7986BCPZ 概述
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital numbers, enabling digital processing and storage. SAR ADCs use a binary search algorithm to determine the digital output, offering a good balance of speed, resolution, and power consumption. The AD7986 belongs to the PulSAR family, known for high accuracy and low noise, and is used in applications such as medical imaging, industrial process control, and scientific instrumentation.
Key features include a 2 MSPS throughput, 18-bit resolution, and a typical signal-to-noise ratio (SNR) of 98 dB. The device supports both SPI and daisy-chain serial interfaces, allowing multiple ADCs to be connected to a single bus. It also includes a busy indicator and a conversion result readback feature. The LFCSP package provides excellent thermal performance and a small footprint for space-constrained designs.
The AD7986 uses a charge redistribution architecture with an internal reference buffer, achieving high linearity and low drift. The device operates over the industrial temperature range of -40°C to +85°C. Its low power dissipation and high speed make it suitable for portable and battery-powered instruments where power efficiency is critical.
Typical applications include high-speed data acquisition, medical imaging (e.g., ultrasound), industrial automation, and test and measurement equipment. The device's high SNR and low distortion ensure accurate signal reproduction in demanding environments.
When designing with the AD7986, ensure proper decoupling of the AVDD and DVDD supplies, and use a low-noise reference voltage source. The VIO pin must be connected to the appropriate logic level to match the host interface. Careful PCB layout, including a solid ground plane and short trace lengths, is essential to achieve the specified performance.
直接替换替代料： AD7986BCPZ ——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： AD7986BCPZ （相同外形与封装尺寸） ——差异在于 Input Type, Resolution, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
AD7986BCPZ-RL7
✅ 直接替换📋 参考替代料（不在目录中）
AD7980BCPZ-RL7
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$18 / 个
查看数据手册 →AD7986BCPZ 最大额定值与电气特性
| 分辨率 | 18 Bit |
| 采样率 | 2 MSPS |
| Number of Inputs | 1 |
| Input Type | Differential |
| Architecture | SAR |
| 电源电压 | 2.5 V |
| Digital Supply Voltage (VIO) | 1.8 V to 2.7 V |
| Power Dissipation | 15 mW |
| SNR (Typical) | 98 dB |
| 接口 | SPI, Daisy-Chain |
| 封装 | 20-Lead LFCSP (4x4 mm) |
| 工作温度范围 | -40°C to +85°C |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| 安装类型 | Surface Mount |
AD7986BCPZ 引脚配置
| 引脚 1 | AVDD — Analog power supply (2.5 V) |
| 引脚 2 | IN+ — Positive differential input |
| 引脚 3 | IN- — Negative differential input |
| 引脚 4 | GND — Ground |
| 引脚 5 | REF — Reference voltage input |
| 引脚 6 | REFGND — Reference ground |
| 引脚 7 | DVDD — Digital power supply (2.5 V) |
| 引脚 8 | VIO — Digital interface supply (1.8 V to 2.7 V) |
| 引脚 9 | SDI — Serial data input (for daisy-chain) |
| 引脚 10 | SCK — Serial clock input |
| 引脚 11 | SDO — Serial data output |
| 引脚 12 | CNV — Conversion start input |
| 引脚 13 | BUSY — Busy indicator output |
| 引脚 14 | GND — Ground |
| 引脚 15 | GND — Ground |
| 引脚 16 | GND — Ground |
| 引脚 17 | GND — Ground |
| 引脚 18 | GND — Ground |
| 引脚 19 | GND — Ground |
| 引脚 20 | GND — Ground |
典型应用
AD7986BCPZ 适用于 6 应用s: Medical Imaging, Industrial Automation, Test and Measurement, Scientific Instrumentation, Audio and Acoustic Analysis, Aerospace and Defense.
Medical Imaging
The AD7986BCPZ's 18-bit resolution and 2 MSPS sampling rate enable high-fidelity signal capture in ultrasound and MRI systems. Its low power consumption (15 mW) is critical for portable devices, and the high SNR (98 dB) ensures accurate image reconstruction. The differential input rejects common-mode noise, improving signal integrity in noisy clinical environments.
推荐
Industrial Automation
In industrial process control and automation, the AD7986BCPZ provides precise analog-to-digital conversion for sensors and transducers. Its 2 MSPS throughput supports real-time monitoring, while the SPI interface simplifies integration with microcontrollers. The wide operating temperature range (-40°C to +85°C) ensures reliability in harsh factory environments, and the low power dissipation reduces heat buildup in enclosed systems.
推荐
Test and Measurement
The AD7986BCPZ is ideal for high-speed data acquisition in oscilloscopes, spectrum analyzers, and other test equipment. Its 18-bit resolution and 2 MSPS sampling rate allow accurate capture of fast transient signals. The low noise and high linearity ensure measurement accuracy, while the small LFCSP package saves board space in compact instruments. The daisy-chain interface enables multi-channel synchronization.
推荐
Scientific Instrumentation
For scientific instruments such as spectrometers and particle detectors, the AD7986BCPZ offers the high resolution and speed needed to capture subtle signal variations. Its low power consumption is advantageous for battery-operated field instruments. The differential input reduces interference, and the wide temperature range supports outdoor and laboratory use. The SPI interface allows easy connection to DSPs and FPGAs.
推荐
Audio and Acoustic Analysis
The AD7986BCPZ's high SNR (98 dB) and 18-bit resolution make it suitable for professional audio and acoustic measurement applications. It can digitize high-frequency signals with low distortion, enabling accurate analysis of sound waves and vibrations. The low power consumption is beneficial for portable audio analyzers, and the small package allows integration into compact devices.
推荐
Aerospace and Defense
In aerospace and defense systems, the AD7986BCPZ provides reliable high-speed conversion for radar, communication, and guidance systems. Its wide temperature range and low power consumption are critical for airborne and satellite applications. The high SNR ensures signal integrity in noisy electromagnetic environments, and the compact LFCSP package withstands vibration and thermal cycling.
推荐
推荐产品汇总
工程参考数据： AD7986BCPZ ——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 | AD7986BCPZ-RL7 | AD7980BCPZ | AD7980BRMZ |
|---|---|---|---|---|
| Package | 20-Lead LFCSP (4x4 mm) | 20-Lead LFCSP (4x4 mm) - same | 20-Lead LFCSP (4x4 mm) - same | 10-Lead MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 18 Bit | 18 Bit | 16 Bit | 16 Bit |
| Sampling Rate | 2 MSPS | 2 MSPS | 1 MSPS | 1 MSPS |
| Power Dissipation | 15 mW | 15 mW | 7 mW | 7 mW |
| SNR (Typical) | 98 dB | 98 dB | 91 dB | 91 dB |
| Interface | SPI, Daisy-Chain | SPI, Daisy-Chain | SPI, Daisy-Chain | SPI, Daisy-Chain |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
关键差异点
- Higher resolution and speed （对比 AD7980BCPZ)
- Higher SNR （对比 AD7980BCPZ)
- Pin-compatible with AD7980BCPZ （对比 AD7980BCPZ)
设计说明
Use separate analog and digital power supplies (AVDD and DVDD) with proper decoupling. Place 0.1 µF and 10 µF capacitors close to each supply pin. The VIO supply should be decoupled with a 0.1 µF capacitor. Ensure the reference voltage (REF) is low-noise and stable, as it directly affects conversion accuracy.
Maintain a solid ground plane under the ADC and avoid routing digital traces near analog inputs. Keep the analog input traces short and shielded to minimize noise pickup. Use a star-ground topology to separate analog and digital grounds, connecting them at a single point. Follow the layout guidelines in the AD7986 datasheet for optimal performance.
Do not exceed the absolute maximum ratings for supply voltages. Ensure the VIO voltage matches the host interface logic level to avoid damage. The CNV pin must be held low during conversion to prevent false triggers. Use a low-jitter clock for SCK to maintain timing accuracy. Verify the reference voltage is within the specified range to avoid clipping.
合规信息
RoHS compliant and lead-free per Analog Devices product page. AEC-Q100 not applicable for this industrial ADC.
