AD977ARZ - 16-Bit 100 kSPS SAR ADC | Analog Devices
MPN: AD977ARZ ✗ انتهى عمره الإنتاجيAD977ARZ نظرة عامة
An ADC is an integrated circuit that converts an analog voltage into a digital code for processing, measurement, or control. The AD977 belongs to the successive-approximation, or SAR, ADC family, which successively compares the input voltage with an internally generated reference voltage. SAR ADCs are widely selected for precision measurement because they provide deterministic conversion behavior, compact implementation, and an effective balance of resolution, speed, and power consumption.
The AD977ARZ provides 16-bit nominal resolution, one analog input, and a 100 kSPS conversion rate. It operates from a single 5 V supply, while an internal 2.5 V reference supplies the conversion reference. Its factory calibration is designed to minimize gain, offset, and nonlinearity errors, reducing the need for extensive calibration in the end system. Digital information is transferred through the high-speed serial interface rather than a parallel data bus, which keeps the package compact and reduces the number of PCB signal traces.
The switched-capacitor SAR architecture supports low-power operation compared with many higher-speed flash and pipeline converters. The manufacturer documentation identifies low power dissipation as a core characteristic, with a 100 mW maximum value reported in the retrieved specification data. Power-down operation is also available for systems that need to reduce consumption when conversions are not continuously required. The usable analog supply range reported by the retrieved data is 4.75 V to 5.25 V.
Typical uses include industrial process monitoring, sensor signal acquisition, instrumentation, communications equipment, data acquisition, and embedded control systems where a 16-bit conversion result and 100 kSPS throughput are sufficient. The serial interface is particularly useful when board space is constrained or the converter is connected to a microcontroller, programmable logic device, or dedicated digital controller.
When designing around the AD977ARZ, preserve separate analog and digital ground return paths and reference the analog input to the AGND1 pin specified by Analog Devices. Drive the analog input from a low-impedance source, and verify the complete power, ground, decoupling, and serial-interface implementation against the manufacturer datasheet before production release.
This page combines the verified manufacturer and distributor specifications, sourced pricing, package information, practical application guidance, and explicit data gaps. It is intended to help engineers evaluate the AD977ARZ for 16-bit, 100 kSPS single-supply acquisition without concealing information that remains unavailable in the retrieved source material.
بدائل مباشرة لـ AD977ARZ — 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 AD977ARZ (نفس عامل الشكل والبصمة) — يختلف في Package, Throughput Rate, Power-Down Mode, Supply Voltage, Converter Type.
AD977AR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←AD977ARZ الحدود القصوى والخصائص الكهربائية
| الدقة | 16 bit |
| معدل أخذ العينات | 100 kSPS |
| Number of Inputs | 1 input |
| Input Type | Single-ended |
| ADC Architecture | Successive approximation, switched-capacitor |
| Analog Supply Voltage Range | 4.75 V to 5.25 V |
| Nominal Supply Voltage | 5 V |
| Internal Reference Voltage | 2.5 V |
| Data Interface | Serial |
| Maximum Power Dissipation | 100 mW |
| Factory Calibration | Factory calibrated to minimize gain, offset, and nonlinearity errors |
| العلبة | 20-pin SOIC |
| نوع التركيب | Surface mount |
| Analog Inputs | 1 unipolar analog input |
| Power-Down Mode | Available |
دليل تكوين أطراف AD977ARZ 20-pin soic
تكوين الأطراف لـ AD977ARZ (حزمة 20-pin soic). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ AD977ARZ.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
AD977ARZ مناسب لـ 6 التطبيقs: Industrial Process Measurement, Precision Sensor Acquisition, Data Acquisition Instruments, Communications and Control Systems, Power and Battery Monitoring, Medical and Diagnostic Instrumentation.
Industrial Process Measurement
The AD977ARZ fits industrial process monitoring where a 16-bit measurement and 100 kSPS throughput are needed without a high-power flash converter. Its single 5 V supply operation, internal 2.5 V reference, and factory calibration can simplify the analog acquisition section of a transmitter or data logger. A conditioned sensor or divider network can drive the single-ended input, while the serial interface reduces trace count compared with a parallel ADC. The main engineering checks are the verified input range, acquisition timing, industrial temperature grade, and isolation requirements; engineers should confirm those details in the Analog Devices datasheet before releasing the design.
موصى به
Precision Sensor Acquisition
The AD977ARZ is appropriate for acquiring slow-to-medium-rate sensor outputs where 16-bit nominal resolution and factory calibration add value. A low-noise reference and low-impedance analog driver help ensure that the switched-capacitor SAR input settles correctly before each conversion. Because the converter uses a serial interface, it fits compact control boards that also contain a microcontroller or programmable logic device. This application benefits from the 100 kSPS maximum rate, but the design must still account for the input full-scale range, source settling time, anti-alias filtering, and the separation of AGND1 from noisy digital return paths.
موصى به
Data Acquisition Instruments
The AD977ARZ supports laboratory and industrial data-acquisition equipment that prioritizes a compact 16-bit converter with predictable SAR conversion behavior. Its 100 kSPS rate is suitable for many pressure, temperature, position, and general-purpose analog channels, while the 20-pin SOIC package remains easy to assemble. The internal 2.5 V reference can simplify the architecture when its accuracy and drift meet the instrument specification. For high-end measurements, engineers should evaluate offset and gain calibration, noise performance, input bandwidth, and reference decoupling using the manufacturer's characterization data rather than relying only on nominal resolution.
موصى به
Communications and Control Systems
AD977ARZ can be used in communication and industrial-control equipment for analog supervisory channels, feedback loops, and received signal-level monitoring. The serial interface provides a practical connection to digital control logic without requiring a 16-bit parallel bus, while the 100 kSPS throughput is more than adequate for many supervisory measurements. Single 5 V operation supports integration into compact mixed-signal boards. Designers should use controlled-impedance routing for the serial signals, provide local supply bypassing, and confirm that the ADC acquisition interval satisfies the control-loop timing requirements under worst-case clock and conversion conditions.
موصى به
Power and Battery Monitoring
The AD977ARZ can monitor low-frequency power-system analog channels where a 16-bit converter helps preserve small measurement changes around a larger DC operating point. Its single 5 V supply and low 100 mW maximum power figure are useful in compact monitoring equipment. Depending on the measured voltage, a resistive divider or differential front end may be required to translate the signal into the ADC input range. The converter's power-down capability can reduce consumption during inactive periods, while the 100 kSPS rate supports fast supervisory updates. Input protection, divider accuracy, and common-mode limitations must be checked against the verified datasheet.
موصى به
Medical and Diagnostic Instrumentation
The AD977ARZ may suit diagnostic or monitoring equipment that digitizes low-bandwidth analog channels at 100 kSPS. Its nominal 16-bit resolution can preserve small signal variations, and the internal reference reduces the number of external precision components. Medical use still requires an application-specific risk assessment: verified operating-temperature limits, electrical safety, isolation, EMC performance, and regulatory claims are not present in the retrieved source data. The analog front end should provide the required input range and patient-signal protection, while AGND1 routing and a low-impedance drive must follow the manufacturer's layout guidance.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD977ARZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD977AR |
|---|---|---|
| Package | 20-pin SOIC | 20-pin SOIC |
| Brand | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit |
| Sampling Rate | 100 kSPS | 100 kSPS |
| Input Channel Count | 1 input | 1 input |
| Input Type | Single-ended | Single-ended |
| Supply Voltage | Single 5 V nominal; 4.75 V to 5.25 V analog range | Single 5 V nominal; 4.75 V to 5.25 V analog range |
| Internal Reference | 2.5 V | 2.5 V |
| Data Interface | Serial | Serial |
| Maximum Power Dissipation | 100 mW | 100 mW |
أبرز الفروقات
- Same-family replacement path with identical headline conversion specifications (مقابلAD977AR)
- Low-power 16-bit acquisition in a compact package (مقابلAD977AR)
- Factory-calibrated converter with integrated reference (مقابلAD977AR)
ملاحظات التصميم
Analog Devices states that the AD977/AD977A contains two analog grounds and that the analog input should be referenced to AGND1, the low-current ground. Route analog input and reference returns independently toward their assigned converter ground pins, keep digital-interface return current away from the input reference, and place bypass capacitors close to the relevant supply pins. This arrangement reduces ground-drop-induced conversion error that would otherwise appear as offset or channel instability.
Drive the analog input from a low-impedance source and allow the switched-capacitor SAR front end to settle before sampling. The retrieved manufacturer guidance specifically identifies low source impedance as important. Place the input driver, anti-alias filter, and protection elements close to the ADC pins, and keep the serial clock and data routes away from the sensitive analog node. Confirm the acquisition interval from the datasheet rather than deriving it only from the 100 kSPS headline rate.
Operate the converter from a nominal 5 V supply within the verified 4.75 V to 5.25 V analog range, and verify the digital-supply limits from the complete datasheet. Use local high-frequency bypass capacitance and minimize supply-loop area. If the AD977 is disabled during idle periods, verify the power-down state and startup behavior in the system controller; maximum power dissipation is reported as 100 mW, so the converter is appropriate for low-power acquisition but still requires normal supply-decoupling discipline.
معلومات الامتثال
The retrieved manufacturer and distributor snippets did not explicitly provide AD977ARZ material-compliance declarations. Statuses are therefore recorded as unknown rather than assumed.