AD574ASE/883B - 12-Bit SAR ADC, Military Grade | Analog Devices
料号： AD574ASE/883B ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $150 | $150.00 |
| 10 | $135 | $1,350.00 |
| 100 | $120 | $12,000.00 |
| 500 | $105 | $52,500.00 |
| 1,000 | $95 | $95,000.00 |
AD574ASE/883B 概述
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital values. The AD574A family is a classic example of a successive-approximation register (SAR) ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their good balance of speed, resolution, and power consumption, making them suitable for a wide range of data acquisition systems. The AD574A is a complete converter, meaning it includes all necessary functions on-chip, such as the reference and clock, simplifying system design.
Key features of the AD574ASE/883B include 12-bit resolution, a maximum conversion time of 35 microseconds, and guaranteed no missing codes over temperature. It supports both 8-bit and 16-bit microprocessor bus interfaces, allowing flexible integration with various digital systems. The device also offers a bipolar input range of -10V to +10V, making it suitable for industrial and instrumentation applications. The military-grade screening ensures reliable operation in harsh environments.
Technically, the AD574A uses a laser-trimmed thin-film resistor network and an internal reference to achieve high accuracy. The device is designed to operate without external components for the reference and clock, reducing system complexity. The 3-state output buffers allow direct connection to a data bus, and the device can be configured for either 8-bit or 16-bit data transfer. The military version (883B) undergoes additional testing and screening to meet stringent reliability standards.
Typical applications include military avionics, radar systems, industrial process control, and test and measurement equipment. The wide input range and high accuracy make it ideal for precision data acquisition in harsh environments. The device's robustness and long-term availability (often through authorized distributors like Rochester Electronics) make it a preferred choice for legacy system maintenance.
When designing with the AD574ASE/883B, ensure proper decoupling on the power supply pins and a clean analog ground plane to minimize noise. The reference and clock are internal, but external bypass capacitors are recommended for optimal performance. Also, consider the conversion time of 35 µs when planning system throughput.
直接替换替代料： AD574ASE/883B ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD574ASE/883B （相同外形与封装尺寸） ——差异在于 Architecture, Resolution, Operating Temperature Range, RoHS Status, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
AD574AUD/883B
✅ 直接替换📋 参考替代料（不在目录中）
AD574ASE/883B 最大额定值与电气特性
| 分辨率 | 12 Bit |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Architecture | SAR |
| Conversion Time | 35 µs (max) |
| 输入电压范围 | -10 V to +10 V |
| 接口 | Parallel |
| 数据总线宽度 | 8-bit / 16-bit |
| Reference Type | Internal |
| 工作温度范围 | -55°C to +125°C |
| Package Type | 28-LCC (11.43x11.43 mm) |
| 安装类型 | Surface Mount |
| Screening Level | MIL-STD-883 Class B |
| 电源电压 | 5 V (logic), ±12 V / ±15 V (analog) |
| RoHS 状态 | Non-compliant (military grade) |
AD574ASE/883B 引脚配置
| 引脚 1 | VLOGIC — Logic supply voltage (5V) |
| 引脚 2 | 12/8 — Data bus width select (12-bit or 8-bit) |
| 引脚 3 | CS — Chip select (active low) |
| 引脚 4 | A0 — Address input for byte selection |
| 引脚 5 | R/C — Read/Convert input |
| 引脚 6 | CE — Chip enable (active high) |
| 引脚 7 | VEE — Negative analog supply (-12V or -15V) |
| 引脚 8 | REF OUT — Reference output (10V) |
| 引脚 9 | AGND — Analog ground |
| 引脚 10 | REF IN — Reference input |
| 引脚 11 | VCC — Positive analog supply (+12V or +15V) |
| 引脚 12 | BIP OFF — Bipolar offset input |
| 引脚 13 | 10V IN — Analog input for 0-10V range |
| 引脚 14 | 20V IN — Analog input for -10V to +10V range |
| 引脚 15 | DGND — Digital ground |
| 引脚 16 | DB0 — Data bit 0 (LSB) |
| 引脚 17 | DB1 — Data bit 1 |
| 引脚 18 | DB2 — Data bit 2 |
| 引脚 19 | DB3 — Data bit 3 |
| 引脚 20 | DB4 — Data bit 4 |
| 引脚 21 | DB5 — Data bit 5 |
| 引脚 22 | DB6 — Data bit 6 |
| 引脚 23 | DB7 — Data bit 7 |
| 引脚 24 | DB8 — Data bit 8 |
| 引脚 25 | DB9 — Data bit 9 |
| 引脚 26 | DB10 — Data bit 10 |
| 引脚 27 | DB11 — Data bit 11 (MSB) |
| 引脚 28 | STS — Status output (busy) |
典型应用
AD574ASE/883B 适用于 6 应用s: Military Avionics, Industrial Process Control, Test and Measurement Equipment, Aerospace Data Acquisition, Radar Systems, Medical Imaging (Legacy).
Military Avionics
The AD574ASE/883B is ideal for military avionics systems due to its MIL-STD-883 Class B screening and wide operating temperature range of -55°C to +125°C. It provides 12-bit resolution with a 35 µs conversion time, enabling accurate digitization of sensor signals in flight control and navigation systems. The internal reference and clock reduce external component count, enhancing reliability in space-constrained avionics modules. Its parallel interface simplifies connection to mission computers, and the bipolar input range of -10V to +10V accommodates various analog sensors without additional signal conditioning.
推荐
Industrial Process Control
In industrial process control, the AD574ASE/883B offers reliable 12-bit conversion for monitoring and control loops. Its 35 µs conversion time supports sampling rates up to ~28 kSPS, sufficient for many process variables like temperature, pressure, and flow. The device's wide input range and internal reference simplify interface to 4-20 mA loops and sensor bridges. The military-grade temperature range ensures operation in harsh factory environments. The parallel bus interface allows easy integration with PLCs and industrial microcontrollers, and the 3-state outputs enable bus sharing in multi-channel systems.
推荐
Test and Measurement Equipment
The AD574ASE/883B is well-suited for test and measurement equipment such as data loggers and digital multimeters. Its 12-bit resolution and 35 µs conversion time provide a good balance of speed and accuracy for general-purpose measurements. The internal reference ensures stable readings over temperature, and the bipolar input range allows direct measurement of both positive and negative signals. The parallel interface enables fast data transfer to DSPs or FPGAs. The device's robustness and long-term availability make it a reliable choice for professional instruments.
推荐
Aerospace Data Acquisition
For aerospace data acquisition systems, the AD574ASE/883B provides a proven, radiation-tolerant ADC solution. Its MIL-STD-883 screening ensures high reliability in space and high-altitude applications. The 12-bit resolution and 35 µs conversion time are adequate for telemetry and payload data. The wide temperature range and ceramic package offer excellent thermal stability. The internal reference and clock minimize external parts, which is critical for weight and space constraints. The parallel interface allows direct connection to spacecraft computers, and the device's heritage in military systems instills confidence in mission-critical designs.
推荐
Radar Systems
In radar systems, the AD574ASE/883B can digitize analog signals from receivers and signal processors. Its 12-bit resolution provides good dynamic range for radar return signals, and the 35 µs conversion time is sufficient for many radar processing tasks. The device's military-grade temperature range and screening make it suitable for deployed radar units. The bipolar input range allows direct connection to IF signals. The parallel interface enables high-speed data transfer to digital signal processors, and the internal reference ensures consistent performance across temperature variations.
推荐
Medical Imaging (Legacy)
Although newer ADCs offer higher performance, the AD574ASE/883B is still used in legacy medical imaging equipment such as older ultrasound and X-ray machines. Its 12-bit resolution and 35 µs conversion time are adequate for many imaging modalities. The military-grade reliability ensures long service life in critical medical devices. The internal reference and clock simplify calibration, and the parallel interface allows integration with existing digital backplanes. For maintenance and repair of legacy systems, this ADC is a reliable replacement part.
推荐
推荐产品汇总
工程参考数据： AD574ASE/883B ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD574ATD/883B | AD574AUD/883B | AD574ASD/883B | AD1674TD/883B | AD674BTD/883B |
|---|---|---|---|---|---|---|
| Package | 28-LCC (11.43x11.43) | 28-CDIP | 28-LCC (11.43x11.43) | 28-CDIP | 28-CDIP | 28-CDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Conversion Time | 35 µs | 35 µs | 35 µs | 35 µs | 10 µs | 15 µs |
| Input Voltage Range | -10V to +10V | -10V to +10V | -10V to +10V | -10V to +10V | -10V to +10V | -10V to +10V |
| Operating Temperature | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C |
| Interface | Parallel 8/16-bit | Parallel 8/16-bit | Parallel 8/16-bit | Parallel 8/16-bit | Parallel 8/16-bit | Parallel 8/16-bit |
| Internal Reference | Yes | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Military-grade screening (MIL-STD-883 Class B) （对比 AD574AUD/883B)
- Surface-mount LCC package （对比 AD574ATD/883B)
- Complete converter with internal reference and clock （对比 AD1674TD/883B)
设计说明
The AD574ASE/883B requires a +5V logic supply and dual analog supplies of ±12V or ±15V. Ensure that the analog supplies are well-regulated and decoupled with 0.1µF ceramic capacitors close to the VCC and VEE pins. The logic supply should be decoupled with a 0.1µF capacitor as well. Proper power supply sequencing is recommended to avoid latch-up.
For optimal performance, use a solid analog ground plane and separate digital ground plane, connecting them at a single point. Place the ADC close to the signal source to minimize trace length and noise pickup. Keep analog input traces away from digital traces to reduce crosstalk. Use a ground plane under the ADC to provide a low-impedance return path.
Do not exceed the absolute maximum ratings for the input voltage or supply voltages. The input voltage range is -10V to +10V; applying voltages beyond this can damage the device. Ensure that the reference output is not loaded excessively. Also, be aware that the conversion time is 35 µs; do not initiate a new conversion before the previous one is complete.
合规信息
Military-grade component, typically exempt from RoHS due to lead in ceramic package and solder. Not AEC-Q100 qualified as it is not an automotive part.
