AD872ASD/883B - 12-Bit 10MSPS ADC | Analog Devices | Military
MPN: AD872ASD/883B ✓ Hoạt độngAD872ASD/883B Tóm tắt
An analog-to-digital converter (ADC) is a device that converts continuous analog signals into discrete digital numbers, enabling digital processing of real-world signals. The AD872ASD/883B is a high-speed, 12-bit ADC that samples at 10 MSPS, making it suitable for applications requiring fast and accurate digitization, such as radar, electronic warfare, and high-speed data acquisition. It uses a proprietary BiCMOS architecture that balances speed and power consumption, and it includes an internal track-and-hold amplifier to maintain signal integrity during conversion.
Key features of the AD872ASD/883B include 12-bit resolution, a 10 MSPS sampling rate, and a parallel output interface. It operates from ±5V power supplies and features a proprietary method ADC architecture. The device is available in a 28-pin ceramic DIP, which provides excellent thermal performance and hermetic sealing for military and aerospace environments. The MIL-STD-883 Class B screening ensures compliance with stringent military quality standards.
Technically, the AD872ASD/883B integrates a track-and-hold amplifier and a voltage reference on-chip, reducing external component count and simplifying system design. The BiCMOS process technology enables high-speed operation while maintaining low power dissipation. The parallel word access output allows direct interface to digital signal processors (DSPs) and microcontrollers. The device is specified for operation from -55°C to +125°C, making it suitable for extreme temperature environments.
Typical applications include military radar systems, electronic warfare, high-speed data acquisition, and instrumentation. The AD872ASD/883B is also used in avionics and satellite communication systems where high reliability and wide temperature range are critical. Its 10 MSPS sampling rate and 12-bit resolution provide the performance needed for demanding signal processing tasks.
When designing with the AD872ASD/883B, ensure proper decoupling of the ±5V supplies and a clean analog ground plane to minimize noise. The internal reference simplifies design, but external reference can be used for improved accuracy. The parallel output should be buffered to avoid loading effects. Given its military-grade screening, the device is ideal for defense and aerospace applications where reliability is paramount.
Bộ thay thế dễ dàng lắp đặt cho AD872ASD/883B — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
AD872ASD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD872AJD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD872AKD
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD872ATD
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD872AUD
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD872ASD/883B Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Tỷ lệ lấy mẫu | 10 MSPS |
| Number of Channels | 1 |
| Input Type | Single-ended |
| Giao diện | Parallel |
| Architecture | Pipelined |
| Điện áp cung cấp | ±5 V |
| Khoảng nhiệt độ hoạt động | -55°C to +125°C |
| Hộp | 28-pin CDIP |
| Kiểu lắp đặt | Through-hole |
| Screening Level | MIL-STD-883 Class B |
| Technology | BiCMOS |
| Trạng thái RoHS | Non-compliant (military grade) |
| Number of Terminals | 28 |
| Package Code | DIP |
Cấu hình chân AD872ASD/883B
| Chân 1 | VIN — Analog input |
| Chân 2 | VREF — Voltage reference input/output |
| Chân 3 | AGND — Analog ground |
| Chân 4 | AVDD — Positive analog supply (+5V) |
| Chân 5 | AVSS — Negative analog supply (-5V) |
| Chân 6 | CLK — Clock input |
| Chân 7 | OE — Output enable (active low) |
| Chân 8 | D0 — Digital output bit 0 (LSB) |
| Chân 9 | D1 — Digital output bit 1 |
| Chân 10 | D2 — Digital output bit 2 |
| Chân 11 | D3 — Digital output bit 3 |
| Chân 12 | D4 — Digital output bit 4 |
| Chân 13 | D5 — Digital output bit 5 |
| Chân 14 | D6 — Digital output bit 6 |
| Chân 15 | D7 — Digital output bit 7 |
| Chân 16 | D8 — Digital output bit 8 |
| Chân 17 | D9 — Digital output bit 9 |
| Chân 18 | D10 — Digital output bit 10 |
| Chân 19 | D11 — Digital output bit 11 (MSB) |
| Chân 20 | DGND — Digital ground |
| Chân 21 | DVDD — Digital supply (+5V) |
| Chân 22 | BUSY — Busy output (indicates conversion complete) |
| Chân 23 | NC — No connect |
| Chân 24 | NC — No connect |
| Chân 25 | NC — No connect |
| Chân 26 | NC — No connect |
| Chân 27 | NC — No connect |
| Chân 28 | NC — No connect |
Ứng dụng tiêu biểu
AD872ASD/883B phù hợp cho 6 Áp dụngs: Military Radar Systems, Electronic Warfare, High-Speed Data Acquisition, Avionics, Satellite Communication, Instrumentation.
Military Radar Systems
The AD872ASD/883B is ideal for military radar systems due to its 12-bit resolution and 10 MSPS sampling rate, which enable accurate digitization of radar returns. Its MIL-STD-883 Class B screening ensures reliability in harsh environments, and the wide temperature range of -55°C to +125°C allows operation in extreme conditions. The on-chip track-and-hold amplifier maintains signal integrity, while the parallel interface simplifies connection to DSPs for real-time processing.
Được đề xuất
Electronic Warfare
In electronic warfare systems, the AD872ASD/883B provides high-speed digitization of wideband signals. Its 10 MSPS sampling rate and 12-bit resolution capture fine details in signals, while the military temperature range and MIL-STD-883 screening ensure operation in demanding environments. The parallel output allows fast data transfer to FPGAs or DSPs for real-time analysis. The internal reference reduces external component count, simplifying system design.
Được đề xuất
High-Speed Data Acquisition
The AD872ASD/883B is well-suited for high-speed data acquisition systems, offering 12-bit resolution at 10 MSPS. Its wide input bandwidth and on-chip track-and-hold amplifier ensure accurate sampling of fast transients. The device operates from ±5V supplies, making it compatible with common analog front-ends. The parallel interface enables straightforward connection to microcontrollers or DSPs. Its military-grade reliability makes it suitable for aerospace and defense data logging.
Được đề xuất
Avionics
The AD872ASD/883B is used in avionics systems for flight control and navigation, where high reliability and wide temperature range are critical. Its 12-bit resolution and 10 MSPS sampling rate provide accurate digitization of sensor signals. The MIL-STD-883 Class B screening ensures compliance with military quality standards. The ceramic DIP package offers hermetic sealing, protecting against moisture and contaminants. The device operates over -55°C to +125°C, suitable for extreme flight conditions.
Được đề xuất
Satellite Communication
In satellite communication systems, the AD872ASD/883B digitizes intermediate frequency (IF) signals for demodulation. Its 10 MSPS sampling rate and 12-bit resolution support high data rates, while the military temperature range ensures operation in space environments. The on-chip voltage reference reduces external components, saving board space. The parallel interface allows efficient data transfer to baseband processors. MIL-STD-883 screening provides confidence in long-term reliability.
Được đề xuất
Instrumentation
The AD872ASD/883B is used in high-performance instrumentation, such as oscilloscopes and spectrum analyzers, where accurate digitization of signals is essential. Its 12-bit resolution and 10 MSPS sampling rate provide high dynamic range. The device's wide temperature range and military-grade screening make it suitable for field-deployed test equipment. The parallel output simplifies interface to display processors. The internal track-and-hold amplifier ensures accurate sampling of high-frequency signals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD872ASD/883B — 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 | AD872ASD | AD872AJD | AD872AKD |
|---|---|---|---|---|
| Package | 28-pin CDIP | 28-pin CDIP | 28-pin CDIP | 28-pin CDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 10 MSPS | 10 MSPS | 10 MSPS | 10 MSPS |
| Temperature Range | -55°C to +125°C | -55°C to +125°C | 0°C to +70°C | -40°C to +85°C |
| Screening | MIL-STD-883 Class B | None | None | None |
| Supply Voltage | ±5V | ±5V | ±5V | ±5V |
| Interface | Parallel | Parallel | Parallel | Parallel |
Bảo phân biệt quan trọng
- MIL-STD-883 Class B screening (vsAD872ASD)
- Military temperature range (vsAD872AJD)
- Ceramic DIP package (vsAD872AJD)
Ghi chú thiết kế
The AD872ASD/883B requires ±5V supplies. Use low-noise linear regulators for analog and digital supplies to minimize noise coupling. Decouple each supply pin with 0.1µF ceramic capacitors placed close to the pins, and add 10µF tantalum capacitors for bulk decoupling. Ensure the analog and digital grounds are connected at a single point to avoid ground loops.
For optimal performance, use a multi-layer PCB with dedicated analog and digital ground planes. Keep the analog input traces short and shielded to reduce noise pickup. Place the ADC close to the signal source. Use a ground plane under the device to provide a low-impedance return path. Avoid routing digital signals near the analog input.
Ensure the clock input is clean and free of jitter, as it directly affects SNR. Use a low-jitter clock source. The analog input should be driven with a low-impedance source to avoid sampling errors. Do not exceed the absolute maximum ratings for supply voltages. The output enable pin (OE) should be tied low to enable outputs, or controlled for bus sharing.
Thông tin tuân thủ
Military-grade component, not RoHS compliant due to lead-based solder and ceramic package. MIL-STD-883 screening.
