AD977AAR - 16-Bit 200 kSPS Serial ADC | Analog Devices
MPN: AD977AAR ✓ Hoạt độngAD977AAR Tóm tắt
An ADC is a semiconductor that converts an analog voltage into a digital number for processing, measurement, or transmission. The AD977AAR belongs to the ADC and data-converter hierarchy, where its 16-bit resolution provides 65,536 nominal code levels. Its serial interface reduces the number of signal connections compared with a parallel converter and is appropriate for systems that transfer converted samples to a controller, DSP, FPGA, or communications equipment.
The AD977AAR provides selectable unipolar and bipolar input ranges, including 0 to 5 V and 0 to 4 V unipolar ranges and 5 V and 3.3 V bipolar ranges. It operates from a single 5 V supply and includes a power-down mode. The manufacturer identifies the AD977AAR as the 200 kSPS member of the AD977 and AD977A family; the AD977 has a 100 kSPS throughput rate. Its low-power design is intended for compact instrumentation and control systems where converter power dissipation must remain controlled.
The converter uses a successive-approximation architecture with an internal sample-and-hold function. External reference and interface circuitry determine the complete analog signal-chain implementation, while the serial output transfers each conversion result to the receiving digital system. The 20-SOIC package provides a conventional surface-mount form factor suitable for industrial and embedded equipment.
Typical applications include process-control instrumentation, data-acquisition systems, industrial measurement equipment, communications receivers, medical monitoring equipment, and embedded control systems. The AD977AAR is especially appropriate when the design requires 16-bit conversion resolution, a 200 kSPS sampling capability, serial output, and operation from a single 5 V supply.
When designing around the AD977AAR, verify the selected input range against the signal source, reference voltage, serial clock arrangement, digital interface levels, and acquisition timing. Confirm that the external front-end can drive the converter input without exceeding the datasheet input limits. Use the manufacturer’s pin-description table and timing diagrams when assigning PCB traces and validating conversion latency.
This page organizes the manufacturer specifications, package information, application guidance, pricing workflow, and replacement considerations for engineers evaluating the AD977AAR in a new or existing data-acquisition design.
Bộ thay thế dễ dàng lắp đặt cho AD977AAR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD977AAR (cùng hình factor và footprint) — khác nhau ở Package, Input Type, Power-Down Mode, Supply Voltage, Throughput Rate.
AD977AR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →AD977ABR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →AD977AZ
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD977ARZ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →AD977AARZ
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD977AAR Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 bit |
| Throughput Rate | 200 kSPS |
| Converter Architecture | Successive approximation |
| Input Type | Unipolar and bipolar |
| Unipolar Input Range | 0 V to 5 V or 0 V to 4 V |
| Bipolar Input Range | ±5 V or ±3.3 V |
| Điện áp cung cấp | 5 V single supply |
| Power Dissipation | 100 mW maximum |
| Power-Down Mode | 50 uW |
| Giao diện | Serial I/O |
| Input Count | 1 input |
| Hộp | 20-SOIC |
| Kiểu lắp đặt | Surface mount |
Hướng dẫn cấu hình chân AD977AAR 20-soic
Cấu hình chân cho AD977AAR (20-soic gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho AD977AAR.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
AD977AAR phù hợp cho 6 Áp dụngs: Industrial Process Measurement, Data-Acquisition Systems, Communications Receivers, Medical Monitoring Equipment, Precision Test and Measurement, Embedded Control and Monitoring.
Industrial Process Measurement
The AD977AAR suits process-monitoring systems that must digitize slowly changing or moderately dynamic sensor signals while retaining 16-bit resolution. Its 200 kSPS throughput provides timing margin for multiplexed analog channels, while the 20-SOIC package simplifies assembly on conventional industrial controller boards. The single 5 V supply requirement simplifies system power planning. Engineers should select the correct unipolar or bipolar input configuration, add suitable analog protection, and verify that the converter’s input bandwidth and settling behavior meet the process-loop requirements.
Được đề xuất
Data-Acquisition Systems
For compact data-acquisition modules, the AD977AAR combines a 16-bit converter with a 200 kSPS sampling rate and serial output. The serial interface limits connector and PCB routing requirements compared with a parallel ADC, making the device suitable for embedded acquisition front ends that feed samples to an MCU, DSP, or FPGA. Its documented maximum dissipation of 100 mW supports compact thermal design. Use the manufacturer timing diagrams to establish clocking, acquisition latency, and the relationship between sample rate and host data transfer.
Được đề xuất
Communications Receivers
The AD977AAR can digitize intermediate or control signals in communications equipment where 16-bit resolution and a 200 kSPS conversion rate are sufficient. Serial I/O helps preserve board area and reduce routing complexity compared with a wide parallel data bus. The selectable 0 to 5 V, 0 to 4 V, ±5 V, and ±3.3 V ranges allow interface selection according to the receiver architecture. Before insertion, confirm signal bandwidth, allowable aliasing, reference accuracy, and clock-jitter sensitivity in the complete receiver chain.
Được đề xuất
Medical Monitoring Equipment
The AD977AAR may be used in medical monitoring and diagnostic instruments that require precise digitisation of low-frequency or controlled-bandwidth physiological signals. Its 16-bit resolution provides 65,536 nominal code levels, and the 200 kSPS rate offers additional sampling margin relative to many low-speed acquisition tasks. The single 5 V operation simplifies analog rail planning. Medical use still requires system-level validation of input protection, isolation, calibration, electrical safety, and the operating-temperature and qualification requirements applicable to the finished instrument.
Được đề xuất
Precision Test and Measurement
The AD977AAR can serve as the conversion element in programmable instrumentation, source-measurement equipment, and laboratory data-acquisition front ends. A 16-bit converter at 200 kSPS is appropriate when the instrument needs consistent numerical resolution and moderate acquisition speed without a parallel data bus. The SOIC package supports accessible assembly and replacement. For laboratory accuracy, evaluate reference stability, gain and offset correction, input settling, source impedance, calibration strategy, and the bandwidth of the complete analog path rather than relying on resolution alone.
Được đề xuất
Embedded Control and Monitoring
The AD977AAR is appropriate for embedded controllers that acquire analog process variables and communicate the results through a serial peripheral interface. Its 200 kSPS capability allows acquisition schedules faster than 100 kSPS, while the single 5 V supply and low stated dissipation simplify power distribution. The converter can sit beside a microcontroller or DSP, with the host issuing clock commands and receiving serial samples. Design the reference and input network for the selected range, provide stable decoupling, and check that the controller supports the converter’s serial clock and data timing.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD977AAR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AD977AR | AD977A | AD977AZ | AD977ARZ | AD977AARZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Throughput Rate | 200 kSPS | 100 kSPS | 200 kSPS | 200 kSPS | 100 kSPS | 200 kSPS |
| Converter Architecture | Successive approximation | Successive approximation | Successive approximation | Successive approximation | Successive approximation | Successive approximation |
| Supply Voltage | 5 V single supply | 5 V single supply | 5 V single supply | 5 V single supply | 5 V single supply | 5 V single supply |
| Power Dissipation | 100 mW maximum | 100 mW maximum | 100 mW maximum | 100 mW maximum | 100 mW maximum | 100 mW maximum |
| Input Ranges | 0 to 5 V, 0 to 4 V, ±5 V, or ±3.3 V | 0 to 5 V, 0 to 4 V, ±5 V, or ±3.3 V | 0 to 5 V, 0 to 4 V, ±5 V, or ±3.3 V | 0 to 5 V, 0 to 4 V, ±5 V, or ±3.3 V | 0 to 5 V, 0 to 4 V, ±5 V, or ±3.3 V | 0 to 5 V, 0 to 4 V, ±5 V, or ±3.3 V |
| Interface | Serial I/O | Serial I/O | Serial I/O | Serial I/O | Serial I/O | Serial I/O |
Bảo phân biệt quan trọng
- Higher conversion throughput than the AD977 (vsAD977AR)
- Single 5 V integration with a compact serial interface (vsAD977AZ)
- Low-power operation with a dedicated power-down state (vsAD977AARZ)
Ghi chú thiết kế
Route the serial clock, data, and control signals away from the analog input and reference nodes. Use a continuous ground plane, place the input network close to the converter, and keep digital return currents out of the sensitive analog-input area. The manufacturer timing diagrams should be used to set acquisition timing and establish the maximum allowable clock jitter before PCB release.
Place the input, reference, and decoupling components directly beside their associated AD977AAR pins. Keep the analog trace short, avoid creating stubs, and provide a low-impedance ground return for the converter and front end. Use the 20-SOIC footprint and manufacturer pin-description table when defining the land pattern and assembly documentation.
Design a stable 5 V supply path for the analog converter and place local high-frequency decoupling at the supply pins. Check the converter’s maximum power dissipation of 100 mW against the actual supply voltage, selected input range, and operating sample rate. Use the manufacturer power-down guidance when the acquisition system spends substantial time idle.
Do not treat the AD977 as an automatic replacement for the AD977AAR: its 100 kSPS throughput is half the AD977AAR’s 200 kSPS rate. Also confirm whether the selected input range requires external sign inversion or scaling for bipolar signals. Before production, validate settling time, reference accuracy, clocking, and digital interface timing across the intended input bandwidth.
Thông tin tuân thủ
Compliance attributes were not stated for AD977AAR in the manufacturer product-page or datasheet search excerpts.
