AD7124-4BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7124-4BRUZ ✓ نشطAD7124-4BRUZ نظرة عامة
An analog-to-digital converter (ADC) is a device that converts a continuous analog signal into a discrete digital representation. The AD7124-4 is a sigma-delta ADC, which uses oversampling and noise shaping to achieve high resolution and excellent noise performance. It is part of the precision ADC family, which is essential in applications requiring accurate measurement of physical quantities such as temperature, pressure, and strain. The AD7124-4 integrates key signal chain components, including a PGA, reference, and excitation current sources, reducing external component count and simplifying design.
Key features of the AD7124-4BRUZ include a 24-bit resolution, low noise performance, and low power consumption. It offers a maximum output data rate of 19.2 kSPS, with programmable gain from 1 to 128. The device includes an internal band gap reference with low drift, and also accepts an external differential reference. It supports SPI communication, and includes diagnostic functions such as open-circuit detection and overvoltage monitoring. The AD7124-4 is recommended for new designs, with a 1ku list price starting from $6.55.
The AD7124-4 uses a sigma-delta architecture with a digital filter, providing high resolution and rejection of out-of-band noise. The PGA allows direct connection of low-level sensors, such as thermocouples and strain gauges, without additional amplification. The device operates from a 2.7V to 3.6V analog supply and a 1.8V to 3.6V digital supply, with a typical current consumption of 1.2 mA in full power mode. The internal reference has a typical drift of 10 ppm/°C, ensuring stable measurements over temperature.
Typical applications include temperature measurement with RTDs and thermocouples, pressure measurement with bridge sensors, and industrial process control. The AD7124-4 is also suitable for battery-powered portable instruments due to its low power consumption. Its integrated excitation current sources simplify RTD and thermocouple biasing, while the PGA and reference reduce external component count.
When designing with the AD7124-4, ensure proper decoupling of the AVDD and DVDD supplies, and place the reference decoupling capacitor close to the REF pin. The SPI interface should be isolated if the ADC is used in noisy industrial environments. The device supports both internal and external references, and the choice depends on the required accuracy and temperature drift.
بدائل مباشرة لـ AD7124-4BRUZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD7124-4BRUZ (نفس عامل الشكل والبصمة) — يختلف في Input Type, Number of Channels, Operating Temperature Range, Package, Sampling Rate.
AD7124-4BRUZ-RL7
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7124-4BBCPZ-RL7
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7190BRUZ
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7799BRUZ
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7124-8BRUZ
📋 بديل مرجعي (غير موجود في الكتالوج)
AD7124-4BRUZ الحدود القصوى والخصائص الكهربائية
| الدقة | 24 Bit |
| Number of Channels | 4 Differential or 7 Single-Ended/Pseudo Differential |
| Input Type | Differential, Single-Ended, Pseudo Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| معدل أخذ العينات | 19.2 kSPS (Maximum) |
| Programmable Gain | 1 to 128 |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| Typical Current Consumption | 1.2 mA (Full Power Mode) |
| Internal Reference Drift | 10 ppm/°C (Typical) |
| نطاق درجة حرارة التشغيل | -40°C to +125°C |
| العلبة | 24-Lead TSSOP |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف AD7124-4BRUZ
| دبوس 1 | SCLK — Serial Clock Input |
| دبوس 2 | DIN — Serial Data Input |
| دبوس 3 | DOUT/RDY — Serial Data Output / Ready |
| دبوس 4 | CS — Chip Select |
| دبوس 5 | DVDD — Digital Supply Voltage |
| دبوس 6 | GND — Ground |
| دبوس 7 | AVDD — Analog Supply Voltage |
| دبوس 8 | REFIN1+ — Positive Reference Input 1 |
| دبوس 9 | REFIN1- — Negative Reference Input 1 |
| دبوس 10 | REFIN2+ — Positive Reference Input 2 |
| دبوس 11 | REFIN2- — Negative Reference Input 2 |
| دبوس 12 | AIN0 — Analog Input 0 |
| دبوس 13 | AIN1 — Analog Input 1 |
| دبوس 14 | AIN2 — Analog Input 2 |
| دبوس 15 | AIN3 — Analog Input 3 |
| دبوس 16 | AIN4 — Analog Input 4 |
| دبوس 17 | AIN5 — Analog Input 5 |
| دبوس 18 | AIN6 — Analog Input 6 |
| دبوس 19 | VBIAS — Bias Voltage Output |
| دبوس 20 | IOUT0 — Excitation Current Output 0 |
| دبوس 21 | IOUT1 — Excitation Current Output 1 |
| دبوس 22 | P0 — General Purpose Output 0 |
| دبوس 23 | P1 — General Purpose Output 1 |
| دبوس 24 | SYNC — Synchronization Input |
التطبيقات النموذجية
AD7124-4BRUZ مناسب لـ 6 التطبيقs: Temperature Measurement with RTDs, Pressure Measurement with Bridge Sensors, Industrial Process Control, Battery-Powered Portable Instruments, Weigh Scale and Strain Gauge, Data Acquisition Systems.
Temperature Measurement with RTDs
The AD7124-4BRUZ is ideal for RTD temperature measurement due to its integrated excitation current sources and high resolution. It provides 24-bit resolution and programmable gain up to 128, allowing direct connection to RTDs without external amplification. The internal reference with low drift ensures accurate temperature readings over a wide range. The device's low power consumption makes it suitable for battery-powered temperature loggers. With SPI interface, it easily interfaces with microcontrollers for data acquisition and control.
موصى به
Pressure Measurement with Bridge Sensors
The AD7124-4BRUZ is well-suited for pressure measurement using bridge sensors. Its PGA allows direct connection to low-level bridge outputs, and the 24-bit resolution provides high accuracy. The device's low noise performance ensures precise pressure readings even in noisy industrial environments. The integrated reference and excitation current sources simplify the signal chain, reducing external components. The SPI interface enables easy integration with microcontrollers for real-time monitoring and control.
موصى به
Industrial Process Control
In industrial process control, the AD7124-4BRUZ provides high-resolution, low-noise analog-to-digital conversion for monitoring and control loops. Its 24-bit resolution and programmable gain allow accurate measurement of process variables such as temperature, pressure, and flow. The device's low power consumption is beneficial for field instruments powered by loop power. The SPI interface supports isolated communication in noisy environments. The integrated diagnostics, such as open-circuit detection, enhance system reliability.
موصى به
Battery-Powered Portable Instruments
The AD7124-4BRUZ is ideal for battery-powered portable instruments due to its low power consumption of 1.2 mA typical. It operates from a 2.7V to 3.6V supply, making it compatible with single-cell lithium-ion batteries. The device's integrated PGA and reference reduce external component count, saving board space and power. The 24-bit resolution ensures accurate measurements for portable data loggers and handheld meters. The SPI interface allows low-power microcontrollers to interface efficiently.
موصى به
Weigh Scale and Strain Gauge
The AD7124-4BRUZ is well-suited for weigh scale and strain gauge applications. Its high resolution and low noise enable precise weight measurements. The PGA allows direct connection to strain gauge bridges, and the integrated excitation current sources simplify sensor biasing. The device's low drift internal reference ensures stable measurements over temperature. The SPI interface facilitates communication with microcontrollers for display and control. The low power consumption is beneficial for portable scales.
موصى به
Data Acquisition Systems
The AD7124-4BRUZ is a versatile ADC for data acquisition systems, offering 4 differential or 7 single-ended inputs. Its 24-bit resolution and programmable gain allow accurate digitization of various analog signals. The device's low noise and high PSRR make it suitable for precision data acquisition in industrial and laboratory settings. The SPI interface supports high-speed data transfer to microcontrollers or DSPs. The integrated reference and diagnostics reduce external components and enhance system reliability.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD7124-4BRUZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD7124-4BRUZ-RL7 | AD7124-4BBCPZ-RL7 | AD7124-8BRUZ | AD7190BRUZ |
|---|---|---|---|---|---|
| Package | 24-Lead TSSOP | 24-Lead TSSOP | 32-Lead LFCSP | 24-Lead TSSOP | 24-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Channels | 4 Differential / 7 Single-Ended | 4 Differential / 7 Single-Ended | 4 Differential / 7 Single-Ended | 8 Differential / 15 Single-Ended | 2 Differential / 4 Single-Ended |
| Maximum Output Data Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 4.8 kSPS |
| Programmable Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Typical Current Consumption | 1.2 mA | 1.2 mA | 1.2 mA | 1.2 mA | 6.5 mA |
| Integrated Excitation Current Sources | Yes | Yes | Yes | Yes | No |
أبرز الفروقات
- Integrated excitation current sources (مقابلAD7190BRUZ)
- Lower power consumption (مقابلAD7190BRUZ)
- More input channels (مقابلAD7190BRUZ)
ملاحظات التصميم
Ensure proper decoupling of AVDD and DVDD supplies. Place 0.1uF and 10uF capacitors close to the AVDD and DVDD pins. The analog and digital supplies should be separated to minimize noise coupling. Use a low-noise LDO for AVDD to maintain ADC performance.
Place the reference decoupling capacitor close to the REFIN pins. Use a 10uF ceramic capacitor for the internal reference. For external reference, use a low-drift reference and place its decoupling capacitor close to the REFIN pins. Keep analog input traces short and shielded to reduce noise pickup.
Avoid exceeding the absolute maximum ratings for AVDD and DVDD. Ensure the SPI interface is isolated if used in noisy industrial environments. The SYNC pin should be tied to DVDD if not used. Do not leave unused analog inputs floating; connect them to AVDD or GND as appropriate.
معلومات الامتثال
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
