ADV7128KR80 - 80MHz 10-Bit Video DAC | Analog Devices
MPN: ADV7128KR80 ✗ Tapus ng BuhayADV7128KR80 Ulas
A video DAC is a mixed-signal semiconductor that converts parallel digital pixel data into an analog video signal. It belongs to the DAC and digital-to-analog converter hierarchy, which sits within ADC/DAC and broader data-conversion semiconductor categories. The ADV7128 combines a high-speed digital input interface, a 10-bit converter core, and analog current-source outputs in one monolithic device, making it suitable for graphics, broadcast, and digital-video equipment.
The principal features of the ADV7128KR80 are its 80 MHz pipelined operating rate, 10-bit conversion resolution, standard TTL input compatibility, and support for both RS-343A and RS-170 output standards. These characteristics allow the converter to process digital pixel streams at rates commonly encountered in high-resolution color graphics and professional video systems while retaining a straightforward digital interface.
Technically, the device uses CMOS monolithic construction and produces its video signal through a high-impedance analog current source. An external 1.23 V reference establishes the converter reference level, while the pixel clock synchronizes the digital-to-analog conversion process. Because the interface is TTL-compatible and the analog output is current-based, PCB layout should minimize digital-clock noise near the output network and preserve clean reference and analog routing.
Typical applications include high-definition television equipment, high-resolution color graphics systems, broadcast video conversion, digital display interfaces, and multimedia video hardware. The ADV7128 is particularly appropriate where an older RS-343A or RS-170-compatible video output is required but a modern parallel DAC with a single +5 V supply is preferred.
The primary design consideration is external-component and signal-integrity planning. The 1.23 V reference, pixel clock, digital input traces, and analog output network must be routed according to the manufacturer's recommended application circuit. Proper decoupling and controlled impedance are necessary to prevent digital switching activity from degrading video quality.
This product data combines verified manufacturer information, distributor listings, lifecycle observations, and engineering guidance to clarify where the ADV7128KR80 fits. It also distinguishes verified drop-in alternatives from package or suffix changes that cannot safely be assumed as replacements.
Mga alternatibo na pwedeng ilagay na ADV7128KR80 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
ADV7128KR100
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ADV7128KR80 Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | 10-bit video digital-to-analog converter |
| Maximum Pipelined Operation | 80 MHz |
| Pangangasiwaan | 10 bit |
| Volte ng Pagbibigay | +5 V |
| Operating Supply Range | 4.75 V to 5.25 V |
| External Reference | 1.23 V |
| Digital Input Interface | 10-bit parallel TTL-compatible pixel input |
| Analog Output | High-impedance current-source output |
| Video Standard Compatibility | RS-343A and RS-170 compatible |
| Process Technology | CMOS monolithic construction |
| Packhaging | 28-pin SOIC, 7.50 mm width |
| Uri ng Pagpapasok | Surface mount |
| Maximum Digital Input Rate | 80 MHz |
Gabay sa Pin Configuration ng ADV7128KR80 28-pin soic, 7.50 mm width
Pin configuration para sa ADV7128KR80 (28-pin soic, 7.50 mm width package). Ang analog component na ito ay may input, output, at power supply pins. Sumangguni sa datasheet ng manufacturer para sa offset null, compensation, at enable pin configurations. Perpekto para sa signal conditioning at amplifier circuits.
Wala ng detalyadong pinout data na magagamit para sa ADV7128KR80.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ADV7128KR80 ay nararapat para sa 6 aplikasyons: High-Definition Television Video Output, High-Resolution Color Graphics, Broadcast and Studio Video Conversion, Legacy Digital Display Interface, Multimedia Video Adapter, Industrial Video Inspection and Monitoring.
High-Definition Television Video Output
The ADV7128KR80 fits legacy HDTV output stages that require a parallel 10-bit pixel bus and conventional analog video. Its 80 MHz maximum pipelined operation accommodates the device's stated video-speed role, while TTL-compatible inputs simplify interfacing with older digital-video logic. The single +5 V supply and external 1.23 V reference support an established mixed-signal architecture. Designers should use the manufacturer's recommended video-output network, terminate the digital bus correctly, and preserve adequate isolation between pixel-clock traces and the sensitive analog output. The 10-bit resolution and RS-343A or RS-170-compatible output make the converter particularly suitable for systems whose video path was designed around conventional component or studio video levels.
Inirekomenda
High-Resolution Color Graphics
The ADV7128KR80 can serve as the final digital-to-analog conversion stage in a high-resolution color-graphics system using a legacy parallel pixel architecture. The 10-bit input preserves the native digital color depth better than an 8-bit converter, and the 80 MHz pipelined rate supports high-speed pixel transfer. TTL-compatible inputs reduce the logic-interface burden when driving the device from older CMOS graphics logic. Because the output is a high-impedance current source, the external resistor and termination network directly influence video amplitude and distortion. PCB implementation should route the ten data lines and pixel clock as a controlled-length bus, place the reference close to the device, and keep the analog output path away from high-current clock and supply traces.
Inirekomenda
Broadcast and Studio Video Conversion
The ADV7128KR80 is appropriate for broadcast and studio equipment that still uses RS-343A or RS-170-compatible analog video outputs. Its 10-bit converter resolution supports higher-fidelity conversion than legacy 8-bit systems, while the 80 MHz pipelined specification addresses high pixel-clock rates. TTL-compatible inputs allow connection to digital video logic without a complex high-voltage interface. The implementation must account for the difference between consumer and studio video levels through the appropriate output network. Signal-integrity measures include a short analog output path, a clean 1.23 V reference, local supply bypassing, and careful separation from switching circuitry. Legacy timing and output-amplitude checks remain mandatory before production use.
Inirekomenda
Legacy Digital Display Interface
The ADV7128KR80 can provide an analog video endpoint for legacy monitors and display controllers that accept a 10-bit parallel pixel stream. Its TTL-compatible input interface supports older controller families, and the +5 V-only power arrangement avoids the multiple rails demanded by some earlier video-output devices. The converter's 80 MHz operation rate should be checked against the controller's maximum pixel clock and total blanking interval. Layout quality directly affects display stability: maintain a consistent pixel-data bus, provide a low-noise reference, and prevent switching-node currents from sharing paths with the analog output. A prototype should be evaluated for color accuracy, edge response, synchronization, and output compliance across the full supported resolution.
Inirekomenda
Multimedia Video Adapter
The ADV7128KR80 is usable in a legacy multimedia adapter that must generate conventional analog video from a parallel digital pixel engine. The 10-bit pixel input and 80 MHz pipelined rate suit graphics pipelines that predate serialized display interfaces, while the standard TTL interface eases connection to existing video controllers. The converter's single +5 V supply and external 1.23 V reference make the power architecture straightforward relative to multi-rail legacy designs. Engineering validation should include pixel-clock timing, output settling at the selected pixel rate, and video-level compliance. Short analog traces, local decoupling, and a dedicated reference-return path are important because display artifacts caused by reference or clock coupling can otherwise be mistaken for converter malfunction.
Inirekomenda
Industrial Video Inspection and Monitoring
The ADV7128KR80 can support legacy industrial video inspection or monitoring equipment that retains an RS-343A or RS-170 analog-video interface. The 10-bit conversion resolution preserves more gray and color information than an 8-bit implementation, while operation up to 80 MHz provides a suitable rate for conventional pixel-clock domains. TTL-compatible digital inputs allow integration with controller logic already designed around older voltage families. For industrial deployment, validate operating-temperature limits, which are not present in the supplied excerpts, and confirm the continued availability of obsolete inventory. The PCB should provide uninterrupted reference and analog routing, use stable video termination, and separate converter output paths from motor controls, switching supplies, and high-energy machine wiring.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ADV7128KR80 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ADV7128KR100 |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 28-pin SOIC | 28-pin SOIC |
| Product Type | 10-bit video DAC | 10-bit video DAC |
| Maximum Pipelined Operation | 80 MHz | 100 MHz |
| Resolution | 10 bit | 10 bit |
| Supply Voltage | +5 V | +5 V |
| External Reference | 1.23 V | 1.23 V |
| Digital Input Interface | TTL-compatible 10-bit parallel pixel input | TTL-compatible 10-bit parallel pixel input |
| Output Compatibility | RS-343A and RS-170 compatible | RS-343A and RS-170 compatible |
Pangunahing mga Pagkakaiba
- Matches the required legacy video-conversion rate (kumpara saADV7128KR100)
- Provides the verified 10-bit video conversion resolution (kumpara saADV7128KR100)
- Uses the established single-supply video architecture (kumpara saADV7128KR100)
Talaan ng Disenyo
Route the ten digital pixel inputs and pixel clock as a compact, consistently timed bus. Keep the analog output and reference paths away from clock edges, switching-regulator traces, and high-current return paths. The supplied data verifies an 80 MHz maximum pipelined rate, so timing margins should be evaluated with the actual pixel clock, board delay, and receiving-device setup requirements rather than inferred only from clock frequency.
Use the manufacturer's recommended application circuit for the 1.23 V external reference, supply bypassing, and high-impedance analog current-source output network. Place reference and decoupling components close to their associated pins, provide a low-impedance return path, and avoid sharing narrow analog traces with digital return currents. Verify output compliance and video amplitude in the final schematic because those values were not included in the supplied excerpts.
Do not treat every ADV7128 suffix as an automatic drop-in replacement. The KR80 ordering code includes a speed grade, while other suffixes may indicate package, temperature, or handling differences. Confirm the complete ordering information, pin assignments, clock limit, operating temperature, and electrical characteristics. Also do not assume that a faster 100 MHz member preserves every timing, power, and output characteristic of the original 80 MHz design.
Impormasyon ng Pagsunod sa Kautusan
The supplied verified excerpts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The obsolete legacy-product status does not by itself establish non-compliance, so these fields remain unknown.
