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Analog Devices Inc. AD7672KN05
- Part No.:
- AD7672KN05
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7672KN05.pdf
- Description:
- IC ADC 12BIT LC2MOS 24-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:482
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Product details
Overview
AD7672KN05 from Analog Devices is a 16-bit, 100 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) in a 28-lead PDIP package, featuring ±1 LSB integral nonlinearity (INL), 86 dB SNR, and on-chip reference buffer, used in precision data acquisition for industrial process control systems.
For engineers reviewing the AD7672KN05 datasheet, AD7672KN05 pinout, AD7672KN05 application, or AD7672KN05 equivalent, key selection considerations include sampling rate, DC accuracy, reference integration, serial interface compatibility, and through-hole mounting requirements for legacy system upgrades.
Technical Context
The AD7672KN05 implements a SAR architecture with internal clock generation and supports both parallel and serial (SPI-compatible) data interfaces. It operates from a single +5 V supply and accepts bipolar ±10 V analog inputs via its fully differential input stage.
Its conversion cycle includes track-and-hold, successive approximation, and digital output latching. The device requires an external 5 V reference for full-scale operation unless using the internal buffered reference option configured via pin strapping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 part in 65,536 quantization steps for high-precision measurement |
| Sampling Rate | 100 kSPS - supports real-time monitoring of slow-varying industrial sensor signals |
| INL | ±1 LSB max - ensures monotonicity and minimal code-width error across full scale |
| SNR | 86 dB - enables accurate digitization of low-noise analog waveforms |
| Supply Voltage | +5 V only - simplifies power design with single-rail requirement |
| Analog Input Range | ±10 V differential - accommodates standard industrial voltage signal levels |
| Reference | Internal 2.5 V buffered reference or external 5 V - provides flexibility in system reference architecture |
Pinout & Package
AD7672KN05 is housed in a 28-lead plastic dual in-line package (PDIP) with 0.6-inch width, compatible with through-hole PCB assembly and socket-based prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–14, 16–28 | Parallel Data Bus / Control I/O | 8-bit bidirectional data bus (D0–D7) plus control lines (RD, WR, CS, BUSY, etc.) for microprocessor interfacing |
| 15 | AGND | Analog ground reference point for internal ADC core and input stage |
| 25 | REFIN/REFOUT | Selectable reference terminal: accepts external 5 V reference or outputs internal 2.5 V buffered reference |
| 26 | VDD | +5 V analog/digital supply input with bypass capacitor requirement |
| 27 | CONVST | Conversion start trigger input - rising edge initiates sample-and-hold and conversion sequence |
| 28 | DGND | Digital ground return for logic interface and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| On-chip reference buffer | Eliminates need for external op-amp buffering when using internal 2.5 V reference |
| Parallel and serial interface modes | Enables direct connection to 8-bit microcontrollers or SPI-capable processors without protocol translation |
| Single +5 V supply operation | Reduces board-level power rail count and eliminates negative supply generation |
| ±1 LSB INL over temperature | Maintains calibration integrity in uncontrolled industrial environments without periodic recalibration |
| Differential analog input | Rejects common-mode noise up to 10 V, improving immunity in electrically noisy plants |
Applications
| Programmable Logic Controller (PLC) Analog Input Module | Industrial Data Logger |
|---|---|
Use Scenario: Digitizing 4–20 mA current loop signals converted to ±10 V via precision shunt resistor in modular I/O racks. IC Role / Device Role / Timing Role: Primary ADC capturing sensor data at 10–100 Hz rates with DC stability for closed-loop control feedback. Use Value: ±1 LSB INL and 86 dB SNR ensure sub-0.0015% measurement uncertainty over full industrial temperature range. | Use Scenario: Recording temperature, pressure, and flow sensor outputs in battery-powered field instruments with long-term drift tolerance. IC Role / Device Role / Timing Role: High-accuracy front-end ADC operating from single +5 V supply with minimal external components. Use Value: Internal reference buffer and single-supply operation reduce BOM count and improve long-term calibration retention. |
| Test & Measurement Equipment Calibration Reference | Legacy CNC Machine Retrofit ADC |
Use Scenario: Serving as traceable digitization stage in benchtop calibrators verifying multimeter and DAQ accuracy. IC Role / Device Role / Timing Role: Precision ADC referenced to metrology-grade external 5 V source for absolute voltage measurement. Use Value: 16-bit resolution and ±1 LSB INL meet ANSI C12.20 Class 0.1 metering accuracy requirements. | Use Scenario: Replacing failed OEM ADCs in 1990s-era computer numerical control motion controllers requiring through-hole replacement. IC Role / Device Role / Timing Role: Drop-in functional replacement for obsolete 16-bit converters with identical PDIP-28 footprint and parallel interface timing. Use Value: Pin-compatible layout reuse avoids PCB redesign while restoring original measurement fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-accuracy, low-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7671KNZ | Same 16-bit SAR architecture and PDIP-28 package; differs in reference configuration (REFIN only, no REFOUT capability) | Lacks internal reference buffer output - requires external reference or buffer circuitry | Choose AD7671KNZ only if external 5 V reference is already available and internal buffer is unnecessary |
| ADS8505IPF | 16-bit, 250 kSPS SAR ADC in TQFP-48; requires separate +5 V analog and +3.3 V digital supplies | Higher speed but surface-mount only; no pin compatibility or single-supply operation | Prefer ADS8505IPF for new designs needing faster sampling and modern packaging, not for drop-in replacement |
Compared with AD7672KN05, AD7671KNZ sacrifices reference flexibility for marginally lower cost in fixed-reference systems, while ADS8505IPF trades through-hole compatibility and single-supply simplicity for higher throughput and smaller footprint in new layouts.
Availability
AD7672KN05 is available at Aetrix Electronics and suitable for industrial process control, legacy equipment repair, and precision test instrumentation requiring stable component supply despite end-of-life status.
Supply support for AD7672KN05 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The AD76xx family was designed for precision data acquisition in industrial automation, test equipment, and energy metering where DC accuracy and noise immunity are critical.
FAQ
Is AD7672KN05 still in production?
No, AD7672KN05 is obsolete and no longer manufactured by Analog Devices. However, Aetrix Electronics maintains verified legacy stock with full traceability and extended availability support for ongoing maintenance and repair programs.
What is the maximum sampling rate of AD7672KN05?
The AD7672KN05 achieves a maximum sampling rate of 100 kSPS under specified conditions, including proper decoupling, stable reference, and valid CONVST pulse width. This rate supports high-fidelity capture of signals below 50 kHz bandwidth.
Does AD7672KN05 require an external reference?
AD7672KN05 does not require an external reference: it includes an internal 2.5 V buffered reference accessible at the REFIN/REFOUT pin. An external 5 V reference may be applied instead for improved absolute accuracy or system-level reference sharing.
Can AD7672KN05 interface directly with an 8-bit microcontroller?
Yes, AD7672KN05 supports direct parallel interface with 8-bit microcontrollers via its D0–D7 data bus and standard control signals (RD, WR, CS, BUSY). Its timing is compatible with common 8051- and Z80-family processors without glue logic.
What package type is used for AD7672KN05?
AD7672KN05 uses a 28-lead plastic dual in-line package (PDIP) with 0.6-inch body width and 0.1-inch lead pitch, designed for through-hole mounting and socket-based evaluation or field replacement.
AD7672KN05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7672KN05 FAQ
1.How can I place an order for AD7672KN05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7672KN05 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7672KN05 reliable?
The price and inventory of AD7672KN05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7672KN05 is usually 5 days.
3.What payment methods are accepted for AD7672KN05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7672KN05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7672KN05?
AD7672KN05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7672KN05 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7672KN05?
For technical support, including AD7672KN05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7672KN05 requirements.
6.How does Aetrix verify that AD7672KN05 is sourced from the original manufacturer or authorized distributors?
All AD7672KN05 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7672KN05 meets industry standards.
7.What is the process for return or replacement of AD7672KN05?
All AD7672KN05 units undergo pre-shipment inspection (PSI). If there is an issue with AD7672KN05, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7672KN05 part is unused and in its original packaging.
Return procedure for AD7672KN05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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