AD974BNZ - 4-Channel 16-Bit 200 kSPS ADC | Analog Devices
MPN: AD974BNZ ✓ Hoạt độngAD974BNZ Tóm tắt
An ADC is a data acquisition IC that converts continuous analog voltages into digital values for processing, measurement, or transmission. In the broader semiconductor hierarchy, the AD974 belongs to the ADC/DAC class of interface ICs and supports instrumentation, industrial control, and embedded signal-processing systems. Its multiplexer permits four single-ended analog inputs to share one high-resolution conversion core, reducing the number of separate converters required in a multichannel design.
The AD974's principal specifications include 16-bit resolution, 200 kSPS throughput, four single-ended channels, a +5 V supply, and selectable input ranges of 0 V to +4 V, 0 V to +5 V, or ±10 V. Maximum power dissipation is listed as 120 mW. A power-down mode is included for systems that need to reduce consumption when conversion activity is not required.
The internal architecture combines the input multiplexer with a high-speed, 16-bit, successive-approximation switched-capacitor ADC. The serial interface provides the converted result to a digital controller or processor. According to the Analog Devices product page and manufacturer datasheet, the internal +2.5 V reference supports the converter without requiring a separate reference source, while the common +5 V supply simplifies system-level power distribution.
Typical uses include four-channel process monitoring, sensor signal acquisition, laboratory measurement systems, industrial data logging, and embedded control equipment. The 0 V to +5 V range is particularly useful for systems whose sensor outputs remain within a unipolar 5 V envelope, while the ±10 V option can simplify interfacing with conventional bipolar industrial signals when the surrounding circuitry provides suitable protection and conditioning.
Designers should account for input settling, conversion timing, serial-interface implementation, and the voltage headroom required by each selected range. External filtering or source impedance can affect acquisition accuracy, so the signal source and conditioning network should be evaluated together with the acquisition timing. The available manufacturer information identifies a maximum power dissipation of 120 mW but does not provide a verified thermal-resistance value in the supplied data.
This page combines manufacturer specifications, distributor availability, verified package information, drop-in comparison options, and practical acquisition-system guidance. It separates documented performance from unavailable details so engineers can review the AD974BNZ for data acquisition, test, and industrial control designs without relying on unverified replacement claims.
Bộ thay thế dễ dàng lắp đặt cho AD974BNZ — 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 AD974BNZ (cùng hình factor và footprint) — khác nhau ở Package, Supply Voltage, Mounting Type, Product Type, Input Multiplexer.
AD974BN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD974ANZ
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Xem tài liệu →AD974BNZ Tỷ lệ tối đa & tính chất điện
| Product Type | 4-channel data acquisition system with serial interface |
| ADC Resolution | 16 bit |
| Sampling Throughput | 200 kSPS |
| Number of Analog Input Channels | 4 single-ended channels |
| Input Multiplexer | 4-channel analog input multiplexer |
| ADC Architecture | Successive-approximation switched-capacitor ADC |
| Internal Reference | +2.5 V |
| Điện áp cung cấp | +5 V |
| Supported Input Range 1 | 0 V to +4 V |
| Supported Input Range 2 | 0 V to +5 V |
| Supported Input Range 3 | ±10 V |
| Digital Interface | High-speed serial interface |
| Maximum Power Dissipation | 120 mW |
| Power-Down Mode | Yes |
| Kiểu lắp đặt | Through hole |
| Hộp | 28-pin PDIP, 0.600 inch (15.24 mm) |
| Trạng thái RoHS | RoHS compliant |
| Lead-Free Status | Lead free |
Hướng dẫn cấu hình chân AD974BNZ 28-pin pdip, 0.600 inch (15.24 mm)
Cấu hình chân cho AD974BNZ (28-pin pdip, 0.600 inch (15.24 mm) 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 AD974BNZ.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
AD974BNZ phù hợp cho 6 Áp dụngs: Industrial Process Monitoring, Multichannel Sensor Acquisition, Laboratory Measurement Systems, Data Logging and Acquisition, Embedded Control and Instrumentation, Test and Measurement Equipment.
Industrial Process Monitoring
The AD974BNZ fits four-channel process monitoring when each sensor output is single-ended and falls within the 0 V to +4 V, 0 V to +5 V, or ±10 V supported range. Its four-channel multiplexer consolidates multiple measurements into one 16-bit, 200 kSPS conversion core, while the serial interface transfers results to a controller. The internal +2.5 V reference simplifies the converter subsystem, and the listed 120 mW maximum power dissipation is suitable for compact industrial electronics. Engineers should add suitable input protection and signal conditioning when field wiring exposes the inputs to transients or large source impedance.
Multichannel Sensor Acquisition
The AD974BNZ is appropriate for acquiring several low-bandwidth sensor channels through a common serial data path. Its 16-bit resolution provides 65,536 nominal quantization levels, while 200 kSPS throughput allows the four-channel multiplexer to service successive channels. The selectable 0 V to +5 V range is useful for sensors with a unipolar 5 V output envelope, and the internal +2.5 V reference reduces the number of external precision components. The system must still validate source settling and acquisition timing against the complete Analog Devices datasheet before using high-impedance sensors.
Laboratory Measurement Systems
The AD974BNZ supports laboratory instruments that need four analog measurement inputs, 16-bit resolution, and a compact serial-interface ADC. Its single +5 V operating supply simplifies analog and digital power planning, while the internal +2.5 V reference provides the converter with an integrated reference. For instrumentation, the supported ±10 V input range can reduce conversion requirements when signals are already bipolar and properly conditioned. Calibration, reference behavior, input-noise performance, and serial timing must be evaluated from the complete manufacturer documentation before setting measurement uncertainty.
Data Logging and Acquisition
The AD974BNZ can serve as the conversion element in a multichannel data logger where four single-ended inputs are sampled at up to 200 kSPS and transferred through a serial interface. The 16-bit conversion core provides greater nominal resolution than lower-bit general-purpose converters, while the three input-range choices offer flexibility across different sensor outputs. Its power-down mode can be used when continuous acquisition is unnecessary, although the verified source does not quantify shutdown timing. A practical implementation should include input filtering, settling buffers where needed, and a controller that supports the documented serial protocol.
Embedded Control and Instrumentation
The AD974BNZ fits embedded control systems that need to observe four analog process variables and retain the sampled data for control decisions. Its serial interface avoids exposing a parallel data bus, while its 200 kSPS conversion capability provides ample headroom for many low-frequency control and monitoring channels. Operation from a single +5 V supply supports integration with conventional embedded logic, and the internal +2.5 V reference avoids a separate reference IC. Design work should verify signal bandwidth, startup behavior, power-down sequencing, and input protection against the complete manufacturer datasheet.
Test and Measurement Equipment
The AD974BNZ can be integrated into compact test equipment that measures up to four single-ended voltages at 16-bit nominal resolution. The 0 V to +5 V option is appropriate for calibrated low-voltage test points, while ±10 V can simplify compatibility with conventional bipolar test signals. The integrated multiplexer, switched-capacitor ADC, internal +2.5 V reference, and serial interface create a compact acquisition block. Accuracy in a finished instrument remains dependent on input buffering, calibration, grounding, reference stability, and the application circuit described in the official Analog Devices documentation.
Dữ liệu tham khảo kỹ thuật cho AD974BNZ — 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 | AD974BN | AD974ANZ |
|---|---|---|---|
| Package | 28-pin PDIP | 28-pin PDIP | 28-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices |
| ADC Resolution | 16 bit | 16 bit | 16 bit |
| Sampling Throughput | 200 kSPS | 200 kSPS | 200 kSPS |
| Input Channels | 4 single-ended channels | 4 single-ended channels | 4 single-ended channels |
| Input Ranges | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V |
| Supply Voltage | +5 V | +5 V | +5 V |
| Internal Reference | +2.5 V | +2.5 V | +2.5 V |
| Maximum Power Dissipation | 120 mW | 120 mW | 120 mW |
| Power-Down Mode | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Lead-free Z-grade ordering option (vsAD974BN)
- Documented distributor availability (vsAD974ANZ)
- Compact four-channel conversion (vsAD974ANZ)
Ghi chú thiết kế
Validate input settling before using the AD974BNZ with high-impedance sensors. The four-channel multiplexer and 200 kSPS sampling architecture require the source impedance, protection network, and any filtering network to settle within the acquisition interval specified by the complete manufacturer datasheet. Place analog traces away from serial-interface clocks and digital return currents, and use a quiet ground path to prevent converter reference and input disturbances from coupling into the measurement.
Decouple the single +5 V supply close to the device and maintain a low-impedance return path. The verified maximum power dissipation is 120 mW, but the supplied source does not provide thermal resistance or junction-temperature data, so it cannot support a complete thermal estimate. Power-down sequencing, startup behavior, and the allowable supply tolerances are also unavailable in the excerpts and must be checked in the official Analog Devices datasheet before final schematic release.
Route the four analog inputs symmetrically where practical and keep their routing away from the serial data lines and supply-return transitions. Because the package is a through-hole 28-pin PDIP, use a prototype layout that allows access to all pins and provide adequate clearance around the analog section. Confirm the actual pin functions and package drawing from the manufacturer documentation before assigning connector locations, grounding pins, or input-range circuitry.
Thông tin tuân thủ
The verified DigChip product page identifies AD974BNZ as lead free and RoHS compliant. REACH, halogen-free, and conflict-minerals information was not supplied. AEC-Q100 is not applicable because the component is an industrial data acquisition ADC and no automotive qualification is stated.
