AD667KN/+ - 12-Bit Voltage Output DAC | Analog Devices
Teilenummer: AD667KN/+ ✗ AbgekündigtAD667KN/+ Übersicht
A digital-to-analog converter, or DAC, converts a digital code into a proportional analog voltage or current. The AD667 belongs to the broader DAC family within data-conversion integrated circuits and mixed-signal semiconductor systems. Unlike a digital potentiometer or passive resistor network, this converter includes both the conversion core and a voltage reference, allowing a digital system to generate an analog output from a numeric command.
The primary feature of the AD667 is its 12-bit conversion resolution, providing 4096 digital output levels. Its architecture uses 12 precision high-speed bipolar current-steering switches and a laser-trimmed thin-film resistor network. The double-buffered input latch allows a new digital input to be loaded while the previous conversion result remains available at the output, which is useful in systems that require controlled output updates.
A high-stability buried-Zener reference is integrated into the device. This reference supports the converter's voltage-output operation and removes the need for an external precision reference in basic single-channel designs. The AD667 is identified as a microprocessor-compatible converter, making its parallel digital interface suitable for processors, programmable controllers, and data-acquisition equipment that can latch a 12-bit command word.
Typical uses include digital potentiometer emulation, programmable voltage sources, industrial control outputs, laboratory signal generation, and embedded instrumentation. Because the converter is complete and referenced, it can simplify analog-output subcircuits while preserving a direct digital control path. System designers should still account for the required bypass capacitors, analog-ground routing, output-load limits, and the settling behavior of the selected update sequence.
The most important design consideration is separating analog and digital return paths appropriately. The Analog Devices AD667 datasheet identifies the analog ground connection as the high-quality ground point for the output amplifier and recommends connecting it directly to the system analog reference point. Careful grounding helps preserve the benefit of the integrated reference and reduces coupling from digital switching activity.
This product page combines the manufacturer's converter architecture, package information, sourcing guidance, and engineering-focused design considerations. It also documents the available directly comparable AD667 option, supported technical questions, and practical implementation guidance for engineers evaluating the AD667KN/+ in legacy or availability-sensitive designs.
Drop-in-Alternativen für AD667KN/+ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
AD667JNZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD667KN/+ Grenzwerte & elektrische Eigenschaften
| Auflösung | 12 bit |
| Number of Channels | 1 channel |
| Ausgangstyp | Voltage output |
| Architecture | Bipolar current-steering DAC |
| Converter Switch Count | 12 precision switches |
| Input Interface | 12-bit parallel digital input |
| Input Latch | Double-buffered |
| Internal Reference | High-stability buried-Zener voltage reference |
| Resistor Network | Laser-trimmed thin-film resistor network |
| Gehäuse | 28-pin PDIP |
| Total Pin Count | 28 pins |
| Montageart | Through-hole mount |
| Shipping Package | Tube |
| MIL-STD-883 Version | Available as a compliant version |
AD667KN/+ tube Pinbelegungsleitfaden
Pinbelegung für AD667KN/+ (tube-Gehäuse). Dieses analoge Bauteil verfügt über Eingangs-, Ausgangs- und Versorgungspins. Offset-Null-, Kompensations- und Enable-Pin-Konfigurationen entnehmen Sie dem Herstellerdatenblatt. Ideal für Signalaufbereitung und Verstärkerschaltungen.
Keine detaillierten Pinbelegungsdaten verfügbar für AD667KN/+.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
AD667KN/+ ist geeignet für 6 Anwendungs: Programmable Voltage Sources, Industrial Process Control, Data-Acquisition Signal Output, Digital Potentiometer Emulation, Laboratory Signal Generation, Embedded Instrumentation and Control.
Programmable Voltage Sources
The AD667KN/+ suits a programmable voltage source because it combines a 12-bit converter, a high-stability buried-Zener reference, and a double-buffered input latch in one device. A controller can load a digital code, command an analog output update, and use the resulting voltage to control another circuit. The 28-pin PDIP package favors through-hole and legacy instrument construction, while the integrated reference simplifies the basic signal chain.
Empfohlen
Industrial Process Control
The AD667KN/+ can provide a microprocessor-controlled analog command for industrial process-control subsystems. Its 12-bit resolution gives 4096 digital steps across the converter's code range, while the double-buffered input latch supports controlled transfer of new commands. The complete converter-and-reference architecture is useful where a compact, traceable analog output is required in equipment built with through-hole control boards.
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Data-Acquisition Signal Output
In a data-acquisition instrument, the AD667KN/+ can generate a controlled analog excitation or test signal from a digital command. Its voltage output, integrated buried-Zener reference, and 12-bit current-steering architecture provide a straightforward path from a processor or controller to the analog test fixture. The design should preserve the recommended analog-ground connection and use the manufacturer's bypass and reference layouts to limit digital coupling.
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Digital Potentiometer Emulation
The AD667KN/+ is suitable for emulating the behavior of a digitally controlled potentiometer or attenuator. A controller writes a 12-bit value to the converter, and the DAC produces a corresponding voltage for the surrounding circuit. Because the reference and conversion circuitry are integrated, the implementation can be simpler than a switched-resistor network. Output loading and settling behavior must remain within the limits defined in the AD667 datasheet.
Empfohlen
Laboratory Signal Generation
The AD667KN/+ fits legacy laboratory instruments that require a digitally commanded, referenced analog output. Its 12-bit resolution supports 4096 code-controlled levels, and the double-buffered input latch helps organize command updates. The 28-pin PDIP package is appropriate for instrument designs using through-hole construction. For low-level signals, grounding and output-conditioning decisions are as important as the converter resolution itself.
Empfohlen
Embedded Instrumentation and Control
The AD667KN/+ can act as the final analog-output stage in an embedded controller or legacy measurement system. A processor supplies a 12-bit code, the double-buffered latch accepts the command, and the converter produces a voltage referenced to the on-chip Zener source. The part is especially relevant to equipment that retains a 28-DIP footprint and values a complete, microprocessor-compatible converter rather than a modular external DAC system.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AD667KN/+ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AD667JNZ |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 28-pin PDIP | 28-DIP - same package |
| Resolution | 12 bit | 12 bit |
| Number of Channels | 1 channel | 1 channel |
| Output Type | Voltage output | Voltage output |
| Internal Reference | High-stability buried-Zener reference | High-stability buried-Zener reference |
| Input Latch | Double-buffered | Double-buffered |
| Converter Architecture | 12 bipolar current-steering switches | 12 bipolar current-steering switches |
| Compatibility | Original target order code | Published as completely replaceable with matching terminals and package |
Wichtigste Unterscheidungsmerkmale
- Fully integrated converter and voltage reference (vs. AD667JNZ)
- Matched 28-DIP drop-in footprint (vs. AD667JNZ)
- Double-buffered command interface (vs. AD667JNZ)
Designhinweise
Route the converter's analog ground to the system analog-reference point. The Analog Devices AD667 datasheet identifies that connection as the high-quality ground for the output amplifier and recommends a direct path to the analog reference point. Keep digital return currents away from the reference and output-amplifier ground so switching activity does not share the same sensitive return path.
Follow the reference and bypass-capacitor arrangement in the manufacturer datasheet when laying out the converter. Place the specified bypass components close to their associated device pins and use short, direct connections for digital command signals. The double-buffered input architecture does not remove the need for a sound reference network and careful supply decoupling.
Do not treat the AD667JNZ comparison as permission to change the converter without checking the board-level grade and sourcing constraints. The published comparison identifies consistent performance, terminals, and package, but procurement should still confirm the exact order code, lifecycle position, and assembly requirements. Avoid substituting modern DACs without a complete pin, interface, and analog-performance review.
Schedule the digital write and analog-output update using the timing information in the AD667 datasheet. The double-buffered input latch allows new command data to be transferred while a previous state is retained, but software timing still needs to account for conversion and settling. Where the output drives sensitive analog circuitry, evaluate the required settling interval before treating the updated voltage as valid.
Compliance-Informationen
The Analog Devices AD667 datasheet states that versions compliant with MIL-STD-883 are available. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status are not established by the available manufacturer information.