AD7988-5BCPZ - 16-Bit 500kSPS SAR ADC | Analog Devices
料号： AD7988-5BCPZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $15.37 | $15.37 |
| 10 | $14.2 | $142.00 |
| 100 | $12.5 | $1,250.00 |
| 500 | $10.8 | $5,400.00 |
| 1,000 | $9.5 | $9,500.00 |
AD7988-5BCPZ 概述
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital numbers, enabling digital systems to process real-world signals. SAR ADCs use a binary search algorithm to determine the digital output, offering a good balance of speed, resolution, and power consumption. The AD7988-5 is part of the SAR ADC family, which is widely used in data acquisition systems, industrial process control, and medical instrumentation.
Key features of the AD7988-5 include ultra-low power consumption, making it suitable for battery-powered and portable applications. It supports a wide logic interface range from 1.8 V to 5 V via the separate VIO supply, allowing direct connection to various microcontrollers and DSPs. The device also supports daisy-chaining multiple ADCs on a single 3-wire bus using the SDI input, simplifying system design and reducing pin count.
The AD7988-5 uses a successive approximation architecture with an internal capacitive DAC, providing high accuracy and low noise. It includes a track-and-hold circuit that captures the input signal, and the conversion result is output serially. The device features a power-down mode to reduce current consumption between conversions, further enhancing its efficiency in duty-cycled applications.
Typical applications include battery-powered instrumentation, portable medical devices, data acquisition systems, and industrial process control. Its high throughput and low power make it ideal for applications requiring continuous monitoring of multiple channels, such as multi-channel data loggers and portable analyzers.
When designing with the AD7988-5, ensure that the reference voltage is stable and well-decoupled, as it directly affects conversion accuracy. The analog input should be driven by a low-impedance source to avoid sampling errors, and proper PCB layout with separate analog and digital grounds is recommended to minimize noise.
直接替换替代料： AD7988-5BCPZ ——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： AD7988-5BCPZ （相同外形与封装尺寸） ——差异在于 Interface, Package, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
AD7988-1BCPZ
✅ 直接替换✓ 有现货
$8.1 / 个
查看数据手册 →AD7988-5BCPZ-RL7
✅ 直接替换📋 参考替代料（不在目录中）
AD7988-5BCPZ-RL
✅ 直接替换📋 参考替代料（不在目录中）
AD7988-5BCPZ 最大额定值与电气特性
| 分辨率 | 16 bit |
| 采样率 | 500 kSPS |
| Number of Input Channels | 1 |
| Input Type | Single-Ended |
| Architecture | SAR |
| Supply Voltage - VDD | 2.375 V to 2.625 V |
| Logic Supply Voltage - VIO | 1.8 V to 5 V |
| 工作温度范围 | -40°C to +125°C |
| 封装 | 10-Lead LFCSP-WD (3x3 mm) |
| 安装类型 | Surface Mount |
| 接口 | SPI, QSPI, MICROWIRE, DSP |
| Daisy-Chain Support | Yes |
| RoHS 状态 | Compliant |
AD7988-5BCPZ 引脚配置
| 引脚 1 | VDD — Power supply input |
| 引脚 2 | GND — Ground |
| 引脚 3 | IN+ — Positive analog input |
| 引脚 4 | IN- — Negative analog input |
| 引脚 5 | REF — Reference voltage input |
| 引脚 6 | VIO — Logic supply voltage |
| 引脚 7 | SCK — Serial clock input |
| 引脚 8 | SDI — Serial data input (for daisy-chain) |
| 引脚 9 | SDO — Serial data output |
| 引脚 10 | CNV — Convert input |
典型应用
AD7988-5BCPZ 适用于 6 应用s: Battery-Powered Instrumentation, Industrial Process Control, Medical Instrumentation, Data Acquisition Systems, Portable Medical Devices, Test and Measurement.
Battery-Powered Instrumentation
The AD7988-5BCPZ's ultra-low power consumption and 500 kSPS sampling rate make it ideal for portable data loggers and handheld test equipment. Its wide operating temperature range ensures reliable operation in field environments. The device's power-down mode further extends battery life in duty-cycled applications, making it a top choice for energy-efficient designs.
推荐
Industrial Process Control
In industrial automation, the AD7988-5BCPZ provides high-resolution, fast conversion of sensor signals such as temperature, pressure, and flow. Its 16-bit resolution ensures precise measurement, while the 500 kSPS throughput enables real-time monitoring. The device's SPI interface simplifies integration with industrial microcontrollers, and its -40°C to +125°C range suits harsh factory environments.
推荐
Medical Instrumentation
The AD7988-5BCPZ is well-suited for portable medical devices such as patient monitors and diagnostic equipment. Its low power consumption is critical for battery-operated devices, and the high resolution ensures accurate readings of physiological signals. The small LFCSP package saves board space, and the wide temperature range supports sterilization processes.
推荐
Data Acquisition Systems
For general-purpose data acquisition, the AD7988-5BCPZ offers a balance of speed and resolution. Its 500 kSPS rate allows sampling of fast-changing signals, while the 16-bit resolution captures fine details. The device's daisy-chain capability enables multiple channels to be read with minimal wiring, simplifying system design and reducing cost.
推荐
Portable Medical Devices
The AD7988-5BCPZ is ideal for portable medical devices like glucose meters and pulse oximeters. Its low power consumption extends battery life, and the high resolution ensures accurate readings. The compact package fits small form factors, and the SPI interface connects easily to low-power microcontrollers. The device's wide temperature range ensures reliable operation in various clinical environments.
推荐
Test and Measurement
In test and measurement equipment, the AD7988-5BCPZ provides accurate digitization of analog signals for analysis. Its high sampling rate and resolution make it suitable for oscilloscopes, spectrum analyzers, and data loggers. The device's low power consumption is beneficial for portable test instruments, and its SPI interface allows easy integration with FPGAs and DSPs.
推荐
推荐产品汇总
工程参考数据： AD7988-5BCPZ ——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 | AD7988-1BCPZ | AD7988-5BCPZ-RL7 | ADS8860 |
|---|---|---|---|---|
| Package | 10-Lead LFCSP-WD (3x3 mm) | 10-Lead LFCSP-WD (3x3 mm) | 10-Lead LFCSP-WD (3x3 mm) | 10-Lead VSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 500 kSPS | 100 kSPS | 500 kSPS | 1 MSPS |
| Input Type | Single-Ended | Single-Ended | Single-Ended | Single-Ended |
| Interface | SPI, QSPI, MICROWIRE, DSP | SPI, QSPI, MICROWIRE, DSP | SPI, QSPI, MICROWIRE, DSP | SPI |
| Supply Voltage (VDD) | 2.375 V to 2.625 V | 2.375 V to 2.625 V | 2.375 V to 2.625 V | 2.7 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
关键差异点
- Higher throughput than AD7988-1 （对比 AD7988-1BCPZ)
- Ultra-low power consumption （对比 ADS8860)
- Wide logic interface range （对比 ADS8860)
设计说明
Ensure that the VDD supply is clean and well-decoupled. Use a 10uF tantalum capacitor in parallel with a 0.1uF ceramic capacitor close to the VDD pin. The VIO supply should also be decoupled with a 0.1uF capacitor. Proper decoupling minimizes noise and ensures accurate conversions.
For optimal performance, separate analog and digital grounds. Use a solid ground plane and place the ADC close to the signal source to minimize trace inductance. Keep the analog input traces short and shielded if necessary. Avoid routing digital signals near the analog input to prevent coupling.
The reference voltage (REF) pin must be driven by a low-impedance source. Use a precision reference like the ADR4520 or a buffer amplifier. Insufficient reference decoupling can cause conversion errors. Also, ensure the analog input is within the specified common-mode range to avoid saturation.
合规信息
RoHS compliance is indicated by the 'Z' suffix in the part number. Other compliance details not specified in the provided data.
