AD570SD/883B - 8-Bit ADC, 25us, MIL-STD-883B | Analog Devices
MPN: AD570SD/883B ✓ פעילAD570SD/883B סקירה
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.
חלופות תחליף ישיר עבור AD570SD/883B — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
AD570SD
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD570JD
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
AD570KD
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
AD570TD
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
AD570SD/883B
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD570SD/883B דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 8 bits |
| Conversion Time | 25 us |
| טווח מתח כניסה | -5 V to +5 V |
| Supply Voltage (Positive) | +5 V |
| Supply Voltage (Negative) | -15 V (also -12 V) |
| טווח טמפרטורת פעולה | -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 |
תצורת פינים של AD570SD/883B
| פין 1 | VLOGIC — Logic supply voltage |
| פין 2 | D0 — Digital output bit 0 (LSB) |
| פין 3 | D1 — Digital output bit 1 |
| פין 4 | D2 — Digital output bit 2 |
| פין 5 | D3 — Digital output bit 3 |
| פין 6 | D4 — Digital output bit 4 |
| פין 7 | D5 — Digital output bit 5 |
| פין 8 | D6 — Digital output bit 6 |
| פין 9 | D7 — Digital output bit 7 (MSB) |
| פין 10 | GND — Ground |
| פין 11 | VEE — Negative supply (-15V) |
| פין 12 | VCC — Positive supply (+5V) |
| פין 13 | BIP OFF — Bipolar offset adjustment |
| פין 14 | ANALOG IN — Analog input |
| פין 15 | BIP OFF — Bipolar offset adjustment |
| פין 16 | CONVERT — Convert start input |
| פין 17 | STATUS — Conversion status output |
| פין 18 | VLOGIC — Logic supply voltage |
יישומים טיפוסיים
AD570SD/883B מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור AD570SD/883B — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- MIL-STD-883B qualification (לעומתAD570SD)
- Wide operating temperature range (לעומתAD570JD)
- Integrated clock and reference (לעומתAD570SD)
הערות תכנון
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.
מידע על תאימות
This is a military-grade component, likely leaded and not RoHS compliant. Compliance data not provided in the verified sources.
