AD7988-5BCPZ - 16-Bit 500kSPS SAR ADC | Analog Devices
MPN: AD7988-5BCPZ ✓ AktifAD7988-5BCPZ Genel Bakış
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.
Drop-in alternatifler için AD7988-5BCPZ — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller AD7988-5BCPZ (aynı form faktörü ve ayağa oturma) — farklı olan Interface, Package, Sampling Rate.
AD7988-1BCPZ
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →AD7988-5BCPZ-RL7
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
AD7988-5BCPZ-RL
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
AD7988-5BCPZ Maksimum Değerlendirmeler & Elektriksel Özellikler
| Çözünürlük | 16 bit |
| Ölçekleme Oranı | 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 |
| İşletim Sıcaklığı Aralığı | -40°C to +125°C |
| Paket | 10-Lead LFCSP-WD (3x3 mm) |
| Montaj Türü | Surface Mount |
| Arayüz | SPI, QSPI, MICROWIRE, DSP |
| Daisy-Chain Support | Yes |
| RoHS Durumu | Compliant |
AD7988-5BCPZ Pin Yapısı
| Pin 1 | VDD — Power supply input |
| Pin 2 | GND — Ground |
| Pin 3 | IN+ — Positive analog input |
| Pin 4 | IN- — Negative analog input |
| Pin 5 | REF — Reference voltage input |
| Pin 6 | VIO — Logic supply voltage |
| Pin 7 | SCK — Serial clock input |
| Pin 8 | SDI — Serial data input (for daisy-chain) |
| Pin 9 | SDO — Serial data output |
| Pin 10 | CNV — Convert input |
Tipik Uygulamalar
AD7988-5BCPZ için uygundur 6 uygulamas: 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.
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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.
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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.
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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.
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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.
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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.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: AD7988-5BCPZ — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | 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 |
Ana Farklılayıcılar
- Higher throughput than AD7988-1 (karşılaştırma:AD7988-1BCPZ)
- Ultra-low power consumption (karşılaştırma:ADS8860)
- Wide logic interface range (karşılaştırma:ADS8860)
Tasarım Notları
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.
Uyumluluk Bilgisi
RoHS compliance is indicated by the 'Z' suffix in the part number. Other compliance details not specified in the provided data.
