AD570JD/+ - 8-Bit Parallel SAR ADC | Analog Devices
MPN： AD570JD/+ ✗ 停產AD570JD/+ 概覽
An ADC is an integrated circuit that converts a continuously varying analog voltage into a digital numerical representation. The AD570 belongs to the successive-approximation ADC category, a sampled-data architecture commonly used for instrumentation, industrial control, process monitoring, data acquisition, and embedded measurement systems. Within the signal-chain hierarchy, it sits between a sensor or conditioning circuit and a digital controller, processor, display, or communications interface.
The AD570's 8-bit resolution provides 256 discrete output codes, while its single parallel output structure exposes the converted word directly on digital output pins. This architecture avoids adding a serial interface such as SPI or I2C. The monolithic implementation includes the reference, clock, comparator, DAC, successive-approximation register, and output buffers, reducing the number of external signal-conditioning and conversion components required for a basic parallel-output ADC design.
According to the manufacturer datasheet, the converter uses integrated injection logic, or I2L, technology for the successive-approximation function. It also incorporates a laser-trimmed silicon-chromium thin-film resistor ladder network and a temperature-compensated subsurface Zener reference. These details indicate that the AD570 combines a complete conversion system with precision-oriented passive and reference elements rather than relying entirely on external components.
Typical uses include industrial panel meters, temperature-controller input channels, laboratory measurement equipment, legacy data-acquisition systems, and embedded control boards that accept bipolar analog signals and produce an 8-bit parallel result. The 18-pin through-hole package is particularly useful for legacy instrument designs and prototypes assembled with conventional through-hole PCB footprints.
Designers should verify the complete AD570 electrical specification from the manufacturer datasheet before replacing or updating a circuit, especially input range, reference behavior, acquisition timing, output logic levels, and temperature limits. Because the AD570 is marked not recommended for new designs, it is better suited to maintaining proven equipment than to starting a new platform without reviewing the current Analog Devices portfolio.
This page consolidates the verified manufacturer description, distributor pricing references, package information, lifecycle status, alternative-device analysis, and practical design guidance. It also distinguishes documented facts from parameters that must be confirmed in the datasheet before creating a new PCB or replacing the converter in production equipment.
直接替換替代品，適用於 AD570JD/+ — 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。
此系列的變體
與下列產品可直接替換的同系列型號： AD570JD/+ （相同外形與佔位） — 差異在於 Output Interface.
AD570JD
✅ 直接替換📋 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 →AD570JD/+ 最大額定值與電氣特性
| 解析度 | 8 bits |
| Number of Output Codes | 256 codes |
| Architecture | Successive approximation |
| Input Channels | 1 channel |
| Input Type | Bipolar |
| Output Interface | 8-bit parallel |
| 封裝 | 18-pin SBDIP/CDIP |
| 安裝類型 | Through-hole |
| On-Chip DAC | Yes |
| On-Chip Voltage Reference | Yes |
| On-Chip Clock | Yes |
| On-Chip Comparator | Yes |
| Successive-Approximation Register | Yes |
| Output Buffers | Yes |
| Resistor Ladder Technology | Laser-trimmed silicon-chromium thin film |
| Reference Technology | Temperature-compensated subsurface Zener |
| Process Technology | Integrated injection logic (I2L) |
AD570JD/+ 18-pin sbdip/cdip 腳位配置指南
AD570JD/+（18-pin sbdip/cdip 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： AD570JD/+.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD570JD/+ 適用於 6 應用s: Legacy Industrial Panel Meter, Temperature Controller Input, Laboratory Data Acquisition, Process Monitoring Interface, Embedded Control Retrofit, Analog Signal Measurement Card.
Legacy Industrial Panel Meter
The AD570JD/+ fits a legacy industrial panel meter that already uses an 18-pin through-hole ADC footprint and requires a parallel digital result. Its 8-bit resolution provides 256 numerical codes, while the integrated DAC, comparator, clock, reference, successive-approximation register, and output buffers form a complete conversion channel. The same 8-bit ADC is suitable for monitoring a scaled process signal rather than serving as a high-resolution measurement instrument. Before modifying production equipment, verify the input range, acquisition timing, logic levels, and temperature limits against the manufacturer datasheet.
推薦
Temperature Controller Input
The AD570JD/+ is appropriate for a temperature-control system whose sensor signal is first converted to a controlled voltage and then sampled by an 8-bit ADC. Its single bipolar input and parallel output allow the controller to read the converted code directly from the eight data pins, avoiding a serial bus in a simple legacy architecture. The on-chip converter blocks reduce external circuitry, although a precision low-drift sensor interface and protection network may still be required. Verify the documented input range and conversion timing before setting control-loop parameters.
推薦
Laboratory Data Acquisition
The AD570JD/+ can serve as the analog front end of a laboratory data-acquisition system when 8-bit resolution is adequate and a parallel interface is preferable to a serial converter. Its integrated successive-approximation function, clock, comparator, DAC, reference, and output buffers support a compact acquisition channel. The 18-pin SBDIP package simplifies repair and retrofit work on through-hole instrumentation. Engineers should evaluate input bandwidth, acquisition timing, reference accuracy, and output settling from the official datasheet before choosing external sampling, filtering, and isolation circuits.
推薦
Process Monitoring Interface
The AD570JD/+ is useful in a process-monitoring interface that must turn a bipolar analog measurement into an 8-bit parallel value for a digital controller. The 256-code resolution limits the observable quantization to 256 levels, making it appropriate for coarse supervisory measurements rather than precision process control. On-chip clocking and output buffering reduce the number of separate digital-interface components, while the through-hole package supports established industrial boards. Confirm the target signal range and timing because the verified source does not state those numerical limits.
推薦
Embedded Control Retrofit
The AD570JD/+ offers a practical retrofit path for an embedded controller board that exposes eight digital data lines and a 4.5 V to 5.5 V interface, provided the existing board uses the documented 18-pin footprint and electrical configuration. Its parallel output avoids adding a serial protocol converter, and its complete on-chip conversion architecture reduces redesign scope. Because the AD570 is not recommended for new designs, engineers should treat it as a maintenance option and validate long-term availability before committing to new production equipment.
推薦
Analog Signal Measurement Card
The AD570JD/+ can support a compact measurement card that converts one bipolar analog input into an 8-bit parallel digital word. The internal DAC, comparator, clock, successive-approximation register, reference, and output buffers make the converter a central element rather than merely a sampling front end. The 18-pin through-hole package is advantageous for repairable laboratory cards assembled on older boards. Signal-conditioning, input protection, reference bypassing, and digital grounding should follow the application information and layout guidance in the manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 AD570JD/+ — 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 | AD570JD | AD570SD |
|---|---|---|---|
| Package | 18-pin SBDIP | 18-pin SBDIP | 18-pin CDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 8 bits | 8 bits | 8 bits |
| Number of Input Channels | 1 channel | 1 channel | 1 channel |
| Conversion Architecture | Successive approximation | Successive approximation | Successive approximation |
| Output Interface | 8-bit parallel | 8-bit parallel | 8-bit parallel |
| Input Type | Bipolar | Bipolar | Bipolar |
| Mounting Style | Through-hole | Through-hole | Through-hole |
主要差異化特點
- Complete monolithic conversion channel (對比AD570SD)
- Direct parallel digital output (對比AD570JD)
- Maintenance-focused 18-pin SBDIP availability (對比AD570SD)
設計說明
Do not treat a shared 18-pin package as proof of drop-in equivalence. The verified listings establish that AD570JD/+ is an 8-bit, one-channel, parallel-output SAR ADC in an 18-pin SBDIP and that AD570SD uses an 18-pin CDIP, but they do not provide complete input-range, timing, reference, and logic-level comparisons. Before replacing the component, compare every pin and electrical limit in the official Analog Devices datasheets and confirm the intended grade.
Use the manufacturer application schematic and pinout to plan the analog input, reference, clock, and digital output routing. Keep the AD570 analog input path away from the eight parallel output lines, and provide a low-impedance ground return for the converter. Because this is a legacy through-hole device, inspect existing boards for socketed or contaminated pins and verify clearance to nearby switching circuitry before energizing a repaired assembly.
Do not infer the permitted supply voltage from the distributor title or the 8-bit resolution label. The supplied verified data does not state the input range, supply range, conversion time, or reference specifications, so all supply, decoupling, and timing decisions must come from the official manufacturer datasheet. Add the conventional local bypass capacitors only at the values and locations specified by Analog Devices, and avoid placing noisy digital return current through the analog ground path.
合規資訊
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The part is an industrial-era mixed-signal ADC rather than an automotive-qualified device, but no formal AEC-Q100 status was provided.
