AD573JN - 10-Bit SAR ADC with 20 us Conversion | Analog Devices
MPN: AD573JN ✗ Cuối đờiAD573JN Tóm tắt
An ADC converts a time-varying analog voltage into a numerical representation for processing by a microprocessor, controller, or other digital logic. The AD573 belongs to the SAR ADC hierarchy: during each conversion, its internal DAC generates successive trial voltages for the comparator, and the successive-approximation register records the binary result. This complete converter category includes the reference, clock, comparator, SAR logic, and digital output interface in one device.
Key features include 10-bit resolution, one analog input, a typical successive-approximation conversion time of 20 us, no missing codes over temperature, operation from a +5 V supply with a negative -12 V or -15 V supply, and a monolithic implementation. Separate HBE and LBE inputs enable the eight most-significant bits or the two least-significant bits for straightforward connection to narrower microprocessor buses.
The AD573JN uses a parallel digital interface rather than a serial protocol. The manufacturer datasheet identifies DB9 through DB2 on pins 10 through 3, with HBE on pin 20 and LBE on pin 19; DB1 and DB0 occupy pins 2 and 1. Its integrated reference, clock, comparator, and output buffering simplify system implementation, although the negative supply requirement and parallel-bus wiring remain important constraints.
Typical uses include industrial process-control instrumentation, laboratory measurement equipment, legacy microprocessor data-acquisition systems, embedded control panels, and educational analog-measurement platforms. The 20 us typical conversion time favors sampled or multiplexed measurement systems rather than high-frame-rate waveform acquisition, while the 10-bit result provides approximately 1024 addressable output codes.
Designers should verify input-range, reference, timing, and logic-level details against the manufacturer datasheet before layout. Decoupling, grounding, bus timing, and unused digital outputs require careful treatment because this legacy-style converter combines analog and digital functions in one package. The cited supply configurations should be followed exactly rather than assuming conventional single-supply operation.
This product record consolidates manufacturer functionality, distributor package information, interface details, and verified drop-in candidates. It also separates documented specifications from unavailable parameters, making the engineering trade-offs and replacement uncertainty explicit rather than presenting unverified values as production-ready design data.
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AD573JD
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| ADC Type | Successive Approximation Register (SAR) |
| Độ phân giải | 10 bit |
| Input Channels | 1 input |
| Conversion Time | 20 us typical |
| Architecture | Complete monolithic SAR converter |
| Integrated DAC | Yes |
| Integrated Voltage Reference | Yes |
| Integrated Clock | Yes |
| Integrated Comparator | Yes |
| Integrated SAR Register | Yes |
| Digital Output Buffers | Three-state output buffers |
| Positive Supply | +5 V |
| Negative Supply Options | -12 V or -15 V |
| Missing Codes | No missing codes over temperature |
| Hộp | 20-pin PDIP |
| Kiểu lắp đặt | Through-hole |
| Digital Interface | Parallel microprocessor bus interface |
Hướng dẫn cấu hình chân AD573JN 20-pin pdip
Cấu hình chân cho AD573JN (20-pin pdip gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
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Ứng dụng tiêu biểu
AD573JN phù hợp cho 6 Áp dụngs: Industrial Process Measurement, Legacy Microprocessor Data Acquisition, Laboratory Measurement Equipment, Embedded Control Panels, Sensor Interface Modules, Educational Analog Systems.
Industrial Process Measurement
The AD573JN fits industrial process-measurement channels that require a complete 10-bit conversion front end rather than only a sampling ADC. Its integrated DAC, voltage reference, clock, comparator, successive-approximation register, and three-state output buffers reduce the number of discrete support components around the converter. The 20 us typical conversion time is suitable for many pressure, temperature, position, and level monitoring loops, while the parallel bus connects readily to older controller hardware. Designers should allow adequate settling time between samples and verify that the converter's documented input range covers the sensor signal without front-end overrange.
Legacy Microprocessor Data Acquisition
The AD573JN is well suited to legacy microprocessor data-acquisition systems using an 8-bit or 16-bit parallel bus. The manufacturer documentation identifies HBE and LBE controls for enabling selected groups of output bits, including the eight most-significant bits and two least-significant bits. That flexibility can simplify bus interfacing when a full 10-bit read is unnecessary. The device's 20 us typical conversion time supports routine supervisory and control measurements, but the system must observe all timing, bus-control, and output-disable requirements stated in the official AD573 datasheet.
Laboratory Measurement Equipment
The AD573JN can provide the measurement conversion stage in laboratory instruments that require moderate resolution and a self-contained converter. Integrating the DAC, reference, clock, comparator, SAR, and output buffers on one monolithic chip simplifies the analog acquisition block and makes the part relevant to bench meters, educational instrumentation, and process demonstrators. Its 10-bit resolution provides 1024 digital code positions, and the 20 us typical conversion time is useful for repeatedly sampled control or display values. Measurement accuracy still depends on the verified input range, reference performance, source impedance, layout, and calibration procedure.
Embedded Control Panels
The AD573JN is applicable to embedded control panels that acquire a variable analog quantity and present it through a parallel digital interface. Its complete monolithic architecture limits the number of separate converter, reference, and clock components needed around a controller, while the 10-bit result is adequate for many position, level, and status displays. The device requires +5 V plus either -12 V or -15 V, so the control-panel power tree must include the negative rail. Firmware must also account for the 20 us typical conversion interval and the documented behavior of the HBE, LBE, and three-state outputs.
Sensor Interface Modules
The AD573JN can serve as the converter in a compact analog sensor interface when the selected sensor output remains within the converter's verified input span. Its integrated reference, clock, DAC, comparator, and successive-approximation register create a more self-contained acquisition channel than a bare sampling ADC. The 20 us typical conversion time supports periodic readings from temperature, pressure, potentiometric, and industrial transducers. Input conditioning remains essential: the design must protect the analog input, provide suitable source impedance, and avoid adding offset or noise that cannot be corrected within the available 10-bit code space.
Educational Analog Systems
The AD573JN is appropriate for teaching laboratories and embedded-systems demonstrations because it exposes the complete SAR conversion chain rather than only a sampling front end. Students can observe successive approximation, use the HBE and LBE output controls, and connect the parallel outputs to a controller or logic analyzer. Its 10-bit resolution and 20 us typical conversion time make the timing behavior easy to study without demanding high-speed sampling hardware. The dual-polarity supply arrangement, including +5 V and -12 V or -15 V, should be included explicitly in instructional schematics so that the laboratory power supply and decoupling reflect the verified operating conditions.
Dữ liệu tham khảo kỹ thuật cho AD573JN — 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 | AD573JD |
|---|---|---|
| Package | 20-pin PDIP | 20-pin PDIP - package details require datasheet confirmation |
| Brand | Analog Devices | Analog Devices |
| Resolution | 10 bit | 10 bit |
| Input Channels | 1 input | 1 input |
| Architecture | SAR | SAR |
Bảo phân biệt quan trọng
- Complete monolithic conversion front end (vsAD573JD)
- Defined 20 us typical conversion timing (vsAD573JD)
- Guaranteed dual-polarity supply configurations (vsAD573JD)
Ghi chú thiết kế
Design the power tree for the verified +5 V and -12 V or -15 V operating combination rather than treating the AD573JN as a single +5 V part. Place the supply bypass capacitors close to the corresponding package pins using the pin definitions and layout guidance in the manufacturer datasheet. Check ground-current return paths so analog and digital return currents do not share a long common segment beneath the converter.
Account for the parallel data bus settling time when connecting DB1 through DB9 to a processor, latch, or analyzer. The manufacturer identifies HBE on pin 20 and LBE on pin 19, plus DB9 through DB2 on pins 10 through 3 and DB1 through DB0 on pins 2 and 1. Verify read-cycle timing, bus direction, and output-disable behavior in the official datasheet rather than inferring them from generic ADC conventions.
Do not assume the input can exceed the converter's specified range or that an unused digital output may remain permanently enabled. The verified materials do not provide the complete analog input range, reference accuracy, temperature limits, or full electrical-characteristics table. Before release, retrieve the official AD573 datasheet and confirm those limits, along with startup, sampling, and power-disipation constraints for the selected operating mode.
Thông tin tuân thủ
The supplied manufacturer information states that an AD573 version compliant with MIL-STD-883 is available, but it does not associate that qualification with AD573JN. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations for AD573JN were not provided.