AD573KN - 10-Bit 20 us SAR ADC IC | Analog Devices
MPN： AD573KN ✗ 停產AD573KN 概覽
An ADC is a data-acquisition semiconductor that converts an analog voltage into a digital code for processing, measurement, or control. The AD573 belongs to the ADC > data converter > data-acquisition IC > semiconductor hierarchy. Its integrated reference, clock, comparator, DAC, and SAR conversion system reduce the number of external discrete functions normally required around a standalone converter, while microprocessor-interface support connects sampled measurements to digital systems.
The converter provides 10-bit resolution, fast successive-approximation conversion at 20 us typical, and a full 8-bit or 16-bit microprocessor bus interface. No missing codes are specified over temperature. Operation is guaranteed with +5 V and -12 V supplies or +5 V and -15 V supplies, providing compatibility with bipolar analog input systems that require both positive and negative rails.
The AD573KN combines an internal voltage reference and clock with a three-state output arrangement for bus-oriented interfacing. Its successive-approximation architecture performs binary conversion by testing successive bit weights, making it suitable for instrument-grade measurement where a sampling interval of approximately 20 us is adequate. The 20-pin PDIP package also supports conventional through-hole assembly rather than requiring a fine-pitch surface-mount footprint.
Typical applications include industrial process measurement, laboratory instrumentation, digital panel meters, transducer signal acquisition, and legacy microprocessor-controlled data-collection systems. Designers commonly connect the converter to a microprocessor or programmable logic controller, assert chip select and control the conversion cycle, then read the resulting digital word through the tri-state bus.
The primary design consideration is power-supply sequencing. The converter requires positive +5 V and a negative -12 V or -15 V rail, so both rails must remain within their operating limits during startup and shutdown. Decoupling should follow the manufacturer datasheet recommendations, and bus outputs should be held in a high-impedance state whenever the device is not selected.
This page organizes the AD573KN technical attributes, verified source links, application guidance, and available same-family replacements into a practical engineering reference. It also separates confirmed performance facts from details that require direct verification against the relevant Analog Devices documentation before a new design is released.
直接替換替代品，適用於 AD573KN — 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。
AD573KNZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD573JNZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD573KN 最大額定值與電氣特性
| Converter Type | Successive approximation ADC |
| 解析度 | 10 bit |
| Conversion Time | 20 us typical |
| Positive Supply Voltage | +5 V |
| Negative Supply Voltage | -12 V or -15 V |
| Microprocessor Interface | 8-bit or 16-bit parallel bus |
| Integrated Reference | Yes |
| Integrated Clock | Yes |
| Integrated Comparator | Yes |
| Integrated DAC | Yes |
| Successive Approximation Register | Integrated |
| Output Buffers | Three-state output buffers |
| Missing Codes Over Temperature | No missing codes |
| Package Type | PDIP-20 |
| 腳位數 | 20 |
| 安裝方式 | Through-hole |
| Temperature Grade | Commercial |
| MIL-STD-883 Version | Available for AD573 family; refer to the current /883B data sheet |
AD573KN pdip-20 腳位配置指南
AD573KN（pdip-20 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AD573KN.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD573KN 適用於 6 應用s: Industrial Process Measurement, Laboratory Data-Acquisition Instrument, Digital Panel Meter, Transducer Signal Acquisition, Legacy Microprocessor Control System, Precision Control Signal Interface.
Industrial Process Measurement
The AD573KN is suitable for acquiring slowly changing industrial signals when 10-bit resolution and a 20 us typical successive-approximation conversion time meet the control-loop bandwidth. Its integrated reference, clock, comparator, DAC, and SAR register reduce the converter subsystem to one monolithic IC. Place the device behind suitable input protection and conditioning, route analog returns carefully, and connect its parallel bus to the controller. The required +5 V and -12 V or -15 V supplies must be available before conversion begins, while the three-state outputs should remain disabled whenever the device is not selected.
推薦
Laboratory Data-Acquisition Instrument
The AD573KN can serve as the measurement converter in a laboratory instrument that uses a microprocessor or programmable controller for readings, calculations, and display formatting. A 20 us typical conversion time is appropriate for many panel-meter and instrumentation channels, while the 10-bit code provides the basic measurement resolution. The integrated reference and clock support a compact analog front end, and the 8-bit or 16-bit parallel interface allows direct host-processor access. Carefully decouple both supply rails and isolate sensitive analog routing from digital switching paths to preserve repeatability.
推薦
Digital Panel Meter
The AD573KN is appropriate for a digital panel meter that converts a conditioned analog measurement into a value displayed by a microprocessor-based controller. Its 20 us typical conversion interval is substantially faster than most slow-changing panel measurements, and the 10-bit output is suitable for basic indication and threshold functions. Use the three-state outputs to share a processor bus where needed, with chip-select logic preventing bus contention. Supply decoupling, analog grounding, and stable reference behavior are critical because they directly influence displayed measurement stability.
推薦
Transducer Signal Acquisition
The AD573KN can digitize outputs from transducers such as pressure, position, temperature, or bridge sensors after suitable conditioning. The 20 us typical SAR conversion time allows the converter to sample many conventional industrial sensor channels, while the integrated reference, clock, and comparator reduce calibration-path complexity. The analog input network must provide the correct range and impedance for the sensor, and a bipolar supply arrangement is required for the AD573KN. Add appropriate input protection and evaluate sensor excitation noise against the converter’s 10-bit measurement resolution.
推薦
Legacy Microprocessor Control System
The AD573KN is well suited to legacy microprocessor control equipment that requires a parallel ADC interface and through-hole assembly rather than a modern serial interface. Its full 8-bit or 16-bit microprocessor bus and three-state output buffers support direct connection to address-decoded control logic. The converter operates from +5 V and -12 V or -15 V, allowing integration with bipolar analog circuits already used in the system. Designers should confirm read-cycle timing, output enable behavior, reset requirements, and bus contention controls in the manufacturer interface description.
推薦
Precision Control Signal Interface
The AD573KN can convert a control or feedback signal into a digital value for a programmable controller in a precision equipment design. Its 20 us typical conversion time supports many closed-loop monitoring functions, while the 10-bit resolution defines the basic feedback resolution. The integrated DAC, reference, clock, comparator, and SAR register form a complete monolithic conversion system, and the parallel bus simplifies connection to older control hardware. The implementation must still account for the bipolar supplies, input settling time, reference accuracy, and grounding needed to achieve useful system-level precision.
推薦
推薦產品摘要
工程參考資料，適用於 AD573KN — 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 | AD573KNZ | AD573JNZ | AD573JN |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | PDIP-20 | PDIP-20 | PDIP-20 | PDIP-20 |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Conversion Time | 20 us typical | 20 us typical | 20 us typical | 20 us typical |
| Converter Architecture | Successive approximation | Successive approximation | Successive approximation | Successive approximation |
| Positive Supply | +5 V | +5 V | +5 V | +5 V |
| Negative Supply | -12 V or -15 V | -12 V or -15 V | -12 V or -15 V | -12 V or -15 V |
| Microprocessor Interface | 8-bit or 16-bit parallel bus | 8-bit or 16-bit parallel bus | 8-bit or 16-bit parallel bus | 8-bit or 16-bit parallel bus |
| Temperature Classification | Commercial | Commercial ordering option | J-grade ordering designation | J-grade ordering designation |
主要差異化特點
- Complete monolithic converter integration (對比AD573KNZ)
- Parallel microprocessor interface retained (對比AD573JNZ)
- Commercial-grade ordering option (對比AD573JN)
設計說明
Design the power tree for +5 V plus either -12 V or -15 V, including startup and shutdown behavior at the converter. Place the required bypass capacitors close to their associated supply pins and keep return-current paths short. Confirm rail polarity and sequencing in the manufacturer connection diagram before fabrication; reversing or prematurely enabling a bipolar rail can prevent normal conversion or exceed device limits.
Keep the analog input, reference-related, and comparator paths away from digital bus return currents and switching-regulator nodes. Use a continuous analog ground region where appropriate, connect it according to the manufacturer guidance, and route the three-state data bus away from sensitive input nodes. The through-hole PDIP layout provides generous routing space, but pin placement still determines which digital outputs sit next to sensitive analog inputs.
Do not assign signals by guessing from the apparent 8-bit or 16-bit bus mode. Use the official AD573 pin-description table to identify data, control, power, and ground pins, including any unused or not-connected positions. Also verify read-cycle timing and output-enable control so that the tri-state outputs never contend with another device on the shared microprocessor bus.
合規資訊
Analog Devices states that the AD573 family is available in a MIL-STD-883-compliant version and directs customers to the Military Products Databook or current /883B data sheet. The specific compliance status of AD573KN was not established.
