AD570SD/883B - 8-Bit ADC, 25us, MIL-STD-883B | Analog Devices
MPN： AD570SD/883B ✓ 啟用中AD570SD/883B 概覽
An analog-to-digital converter (ADC) is an electronic component that converts continuous analog signals into discrete digital numbers, enabling digital systems to process real-world signals. The AD570 is a successive approximation ADC, a type that uses a binary search algorithm to converge on the digital representation, balancing speed and resolution. It belongs to the broader category of data converters, which are essential in signal processing chains bridging analog sensors and digital processors.
Key features include 8-bit resolution, a conversion time of 25 microseconds, and a parallel output interface with 8-bit access. The device offers unipolar and bipolar input ranges, with full-scale calibration and offset adjustments. It is guaranteed to operate with -15 V and +5 V supplies, and also supports -12 V operation. The military-grade processing ensures reliability in harsh environments, with a temperature range of -55°C to +125°C.
Technically, the AD570 integrates all conversion functions on a single chip, eliminating the need for external clock or reference components. The successive approximation architecture provides a deterministic conversion time, making it suitable for real-time sampling. The device features a tri-state output buffer for bus-oriented systems, and its bipolar input capability allows direct connection to bipolar analog signals without external level shifting.
Typical applications include military avionics, industrial process control, data acquisition systems, and test and measurement equipment where high reliability and wide temperature operation are critical. The AD570SD/883B is particularly suited for legacy military systems requiring a drop-in replacement for the original AD570.
When designing with this device, ensure proper supply decoupling and consider the input impedance and settling time for accurate conversions. The device's parallel interface simplifies connection to microprocessors, but timing requirements must be observed for reliable data transfer.
直接替換替代品，適用於 AD570SD/883B — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
AD570SD
✅ 直接替換聯絡詢價
查看資料表 →AD570JD
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD570KD
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD570TD
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD570SD/883B
✅ 直接替換聯絡詢價
查看資料表 →AD570SD/883B 最大額定值與電氣特性
| 解析度 | 8 bits |
| Conversion Time | 25 us |
| 輸入電壓範圍 | -5 V to +5 V |
| Supply Voltage (Positive) | +5 V |
| Supply Voltage (Negative) | -15 V (also -12 V) |
| 工作溫度範圍 | -55°C to +125°C |
| Package Type | 18-pin Side-Brazed Ceramic DIP (SBDIP) |
| Screening Level | MIL-STD-883B Class B |
| Output Interface | Parallel, 8-bit |
| Architecture | Successive Approximation |
| Number of Channels | 1 |
| Input Type | Bipolar |
AD570SD/883B 腳位配置
| 腳位 1 | VLOGIC — Logic supply voltage |
| 腳位 2 | D0 — Digital output bit 0 (LSB) |
| 腳位 3 | D1 — Digital output bit 1 |
| 腳位 4 | D2 — Digital output bit 2 |
| 腳位 5 | D3 — Digital output bit 3 |
| 腳位 6 | D4 — Digital output bit 4 |
| 腳位 7 | D5 — Digital output bit 5 |
| 腳位 8 | D6 — Digital output bit 6 |
| 腳位 9 | D7 — Digital output bit 7 (MSB) |
| 腳位 10 | GND — Ground |
| 腳位 11 | VEE — Negative supply (-15V) |
| 腳位 12 | VCC — Positive supply (+5V) |
| 腳位 13 | BIP OFF — Bipolar offset adjustment |
| 腳位 14 | ANALOG IN — Analog input |
| 腳位 15 | BIP OFF — Bipolar offset adjustment |
| 腳位 16 | CONVERT — Convert start input |
| 腳位 17 | STATUS — Conversion status output |
| 腳位 18 | VLOGIC — Logic supply voltage |
典型應用
AD570SD/883B 適用於 6 應用s: Military Avionics, Industrial Process Control, Data Acquisition Systems, Test and Measurement Equipment, Medical Monitoring, Aerospace Telemetry.
Military Avionics
The AD570SD/883B is ideal for military avionics systems due to its MIL-STD-883B qualification and wide operating temperature range of -55°C to +125°C. Its 8-bit resolution and 25us conversion time are sufficient for flight control monitoring and sensor data acquisition. The device's parallel interface simplifies integration with mission computers, and its bipolar input range allows direct connection to analog sensors. The rugged ceramic package ensures reliability under vibration and thermal stress, making it a trusted choice for legacy avionics upgrades.
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Industrial Process Control
In industrial process control, the AD570SD/883B provides reliable 8-bit analog-to-digital conversion for monitoring temperature, pressure, and flow. Its 25us conversion time enables real-time control loops, while the bipolar input range accommodates both positive and negative sensor signals. The device operates from standard -15V and +5V supplies, simplifying power design. The wide temperature range and ceramic package make it suitable for harsh factory environments. Its parallel output interface connects directly to microcontrollers or PLCs, reducing system complexity.
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Data Acquisition Systems
The AD570SD/883B is well-suited for data acquisition systems requiring moderate-speed, 8-bit resolution. Its integrated clock and reference eliminate the need for external components, simplifying board design. The device's 25us conversion time allows sampling rates up to 40 kSPS, adequate for many industrial and scientific applications. The parallel output interface enables easy interfacing with DSPs and microprocessors. The military-grade screening ensures long-term reliability in critical data logging applications.
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Test and Measurement Equipment
For test and measurement equipment, the AD570SD/883B offers a balance of speed and resolution. Its 25us conversion time supports accurate waveform digitization, while the 8-bit resolution is sufficient for many instrumentation applications. The device's bipolar input range allows direct measurement of positive and negative voltages without external conditioning. The parallel interface simplifies connection to display and processing circuits. The wide temperature range and rugged package make it suitable for portable and benchtop instruments used in field environments.
推薦
Medical Monitoring
In medical monitoring, the AD570SD/883B provides reliable conversion of physiological signals such as ECG and temperature. Its 8-bit resolution is adequate for many monitoring applications, and the 25us conversion time supports real-time data acquisition. The device's bipolar input range allows direct connection to sensor outputs. The military-grade reliability ensures consistent performance in critical care environments. The compact SBDIP package fits into space-constrained medical devices, and the wide temperature range accommodates various operating conditions.
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Aerospace Telemetry
The AD570SD/883B is used in aerospace telemetry systems for converting analog sensor data into digital format for transmission. Its 25us conversion time enables high-speed data acquisition, while the 8-bit resolution is sufficient for many telemetry channels. The device's MIL-STD-883B qualification ensures reliability in space and high-altitude environments. The bipolar input range accommodates various sensor outputs, and the parallel interface simplifies data formatting. The wide temperature range and ceramic package withstand extreme conditions.
推薦
推薦產品摘要
工程參考資料，適用於 AD570SD/883B — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD570SD | AD570JD | AD570KD | AD570TD |
|---|---|---|---|---|---|
| Package | 18-pin SBDIP | 18-pin SBDIP | 18-pin SBDIP | 18-pin SBDIP | 18-pin SBDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Conversion Time | 25 us | 25 us | 25 us | 25 us | 25 us |
| Operating Temperature | -55°C to +125°C | -55°C to +125°C | 0°C to +70°C | -25°C to +85°C | -55°C to +125°C |
| Screening Level | MIL-STD-883B | None | None | None | None |
| Input Voltage Range | -5V to +5V | -5V to +5V | -5V to +5V | -5V to +5V | -5V to +5V |
| Supply Voltage | +5V, -15V | +5V, -15V | +5V, -15V | +5V, -15V | +5V, -15V |
主要差異化特點
- MIL-STD-883B qualification (對比AD570SD)
- Wide operating temperature range (對比AD570JD)
- Integrated clock and reference (對比AD570SD)
設計說明
The AD570SD/883B requires dual supplies: +5V and -15V (or -12V). Ensure adequate decoupling with 0.1uF ceramic capacitors close to the VCC and VEE pins. The -15V supply should be clean and stable, as it powers the internal reference and comparator. A low-impedance ground plane is essential to minimize noise coupling into the analog input.
For optimal performance, keep the analog input trace short and shielded from digital signals. Use a ground plane under the device to reduce noise. The CONVERT and STATUS pins should be routed away from the analog input to prevent digital switching noise from coupling. Consider adding a series resistor on the analog input for overvoltage protection.
Do not exceed the absolute maximum ratings for supply voltages. The analog input should be within -5V to +5V to avoid damage. Ensure the CONVERT pulse meets the minimum width specified in the datasheet. The STATUS output indicates conversion completion; wait for it to go low before reading data. Incorrect timing can result in invalid data.
合規資訊
This is a military-grade component, likely leaded and not RoHS compliant. Compliance data not provided in the verified sources.
