AD725ARZ-RL - RGB to NTSC/PAL Video Encoder | Analog Devices
부품 번호: AD725ARZ-RL ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $5.12 | $5.12 |
| 10 | $4.61 | $46.10 |
| 100 | $4.1 | $410.00 |
| 500 | $3.68 | $1,840.00 |
| 1,000 | $3.27 | $3,270.00 |
AD725ARZ-RL 개요
A video encoder is a mixed-signal device in the data conversion and video interface hierarchy that transforms parallel or analog component video (RGB or YUV) into a single composite baseband video signal, or into separate luminance (Y) and chrominance (C) signals for S-Video. Encoders sit between a graphics processor or video source and a TV monitor, VCR, or video capture input, performing the color-space conversion, subcarrier modulation, and sync generation required by broadcast television standards.
Key features of the AD725 include both NTSC and PAL composite video outputs and separate chrominance and luminance (S-Video) outputs from the same device, a luminance trap (YTRAP) port that reduces cross-color artifacts generated by subcarrier-frequency components present in the luminance signal, fully TTL-compatible logic levels that support 3 V CMOS logic requirements, and an integrated luminance delay line. This combination allows a single, very low cost device to serve as the complete analog video output stage for embedded systems.
Technically, the AD725 performs RGB-to-YUV matrix conversion, quadrature modulation of the color difference signals onto a subcarrier, and sync insertion, producing standard-amplitude baseband video. For portable or other power-sensitive applications, the device can be powered down to less than 1 uA of current consumption, which is exceptionally low for a video-grade mixed-signal encoder.
Typical applications include embedded graphics boards, set-top box video outputs, industrial display interfaces, legacy TV-out ports on microprocessor systems, and video test equipment where NTSC or PAL composite output is required from an RGB source.
A key design consideration is proper use of the YTRAP pin: connecting the correct external LC trap circuit suppresses subcarrier leakage into the luminance path and materially reduces cross-color shimmer on fine luma detail. Supply decoupling and standard-accuracy crystal reference for the color subcarrier are also important for color accuracy.
This page synthesizes distributor pricing, drop-in alternatives, practical design notes, and application guidance not found in the manufacturer datasheet alone.
드롭인 대체품: AD725ARZ-RL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD725ARZ-RL (동일 폼 팩터 및 풋프린트) — 차이점: Package.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청AD725ARZ-RL 최대 정격 & 전기적 특성
| 기능 | RGB to NTSC/PAL Video Encoder |
| Video Standards Supported | NTSC and PAL |
| Video Outputs | Composite Video; Chrominance and Luminance (S-Video) |
| Luma Trap Port | Yes (YTRAP, reduces cross-color artifacts) |
| Logic Input Levels | TTL compatible (supports 3 V CMOS systems) |
| Integrated Luma Delay | Yes |
| Power-Down Current | < 1 uA |
| 패키지 | 16-SOIC (0.295 in, 7.50 mm width) |
| 실장 유형 | Surface Mount |
| Packaging | Tape & Reel (-RL suffix) |
| Resolution / Color Depth | Analog input (RGB component signals) |
AD725ARZ-RL 16-soic (0.295 in, 7.50 mm width) 핀 구성 가이드
AD725ARZ-RL(16-soic (0.295 in, 7.50 mm width) 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: AD725ARZ-RL.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
AD725ARZ-RL 적합 용도: 6 애플리케이션s: Embedded Graphics TV-Out Port, Portable and Battery-Powered Video Devices, Industrial Display and HMI Video Interfaces, Set-Top Box and Consumer Video Auxiliary Output, Video Test and Measurement Equipment, Retro Computing and Legacy System Restoration.
Embedded Graphics TV-Out Port
The AD725ARZ-RL is the classic analog TV-output stage for embedded processors and graphics controllers that provide RGB component video. Its TTL-compatible logic levels accept 3 V CMOS sync and control signals directly, so no level shifting is needed between a 3.3 V microprocessor and the encoder. The device converts the RGB stream into NTSC or PAL composite video at standard baseband amplitude, or into S-Video Y/C pairs for higher-quality connection to TV inputs. The integrated luma delay keeps luminance and chrominance timing aligned, avoiding visible offset between color and detail edges. Because the encoder is very low cost and available in a 16-SOIC surface-mount package, it fits comfortably on cost-sensitive consumer and industrial boards where a single low-cost IC must deliver a standards-compliant composite video signal from a digital system's RGB output.
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Portable and Battery-Powered Video Devices
For portable or other power-sensitive applications, the AD725 can be powered down to less than 1 uA of current consumption per the Analog Devices datasheet, an exceptionally low shutdown figure for a video encoder. In handheld test units, portable media players, and battery-operated inspection cameras that only drive a TV intermittently, the encoder draws essentially nothing when the video stage is disabled, preserving battery life. On wake-up, the device resumes NTSC or PAL encoding of the RGB input with composite and S-Video outputs available immediately. The compact 16-SOIC (7.50 mm width) package keeps board area small, and tape-and-reel (-RL) packaging suits the automated assembly lines used in volume portable-product manufacturing. Designers should budget for the active-mode supply current listed in the datasheet electrical characteristics table when sizing the battery and regulator.
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Industrial Display and HMI Video Interfaces
Industrial human-machine interfaces and legacy control-room displays frequently require composite NTSC or PAL video outputs to feed monitors, video distribution amplifiers, or recording equipment. The AD725ARZ-RL converts the RGB output of an industrial graphics controller into standards-compliant baseband video with both composite and S-Video outputs. The YTRAP luma trap port reduces cross-color artifacts caused by subcarrier-frequency components in the luminance signal, improving picture quality when displaying fine HMI detail such as text and graticules. TTL-compatible inputs allow direct connection to 3 V CMOS logic common in industrial controllers. The surface-mount 16-SOIC package withstands standard industrial assembly processes, and the active product status of the AD725 family on analog.com supports long-term sourcing for equipment with multi-year service life expectations.
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Set-Top Box and Consumer Video Auxiliary Output
Set-top boxes, DVRs, and consumer AV products historically used the AD725 as the low-cost auxiliary composite/S-Video output stage feeding TV SCART or RCA inputs. The encoder's RGB inputs accept the graphics processor's component video, and its dual standard support (NTSC and PAL from one device) lets a single hardware design ship into multiple geographic markets with only configuration and subcarrier reference changes. The integrated luminance delay line maintains proper Y/C alignment without external delay components, reducing BOM cost. Cross-color performance on composite outputs is improved via the YTRAP pin, which is important when consumer content contains fine textures. With pricing in the low single-digit dollar range at 1000-piece volumes as of 2026-10-20, the AD725ARZ-RL remains one of the most economical ways to add a standards-compliant analog video output to a consumer design.
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Video Test and Measurement Equipment
Bench instruments, pattern generators, and production test fixtures use the AD725ARZ-RL to produce reference NTSC/PAL composite and S-Video signals from internally generated RGB test patterns. Because the encoder implements standard luminance and chrominance encoding with integrated luma delay, its output is representative of consumer-grade signal characteristics, making it useful for verifying TV, monitor, and video-capture inputs. The YTRAP port allows the test designer to evaluate cross-color behavior deliberately by including or omitting the trap network. TTL-level control inputs interface directly with the 3 V CMOS logic of modern instrument FPGAs and microcontrollers, and the sub-1 uA power-down state supports battery-powered field testers. The 16-SOIC package reflows on standard instrument PCB processes, and tape-and-reel packaging supports the production volumes of instrument OEMs.
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Retro Computing and Legacy System Restoration
Restoration and reproduction designs for retro computers, arcade boards, and legacy industrial systems rely on the AD725ARZ-RL to regenerate composite NTSC/PAL video from original RGB sources, since period-correct encoder chips are often obsolete. The AD725's straightforward RGB input interface matches the component-video output of vintage graphics chips, and its composite and S-Video outputs connect to modern TVs and capture devices. Designers of replacement boards appreciate that the AD725 family remains actively listed by Analog Devices, avoiding the obsolescence risk of alternatives, and that the datasheet's application circuits for the YTRAP network and subcarrier crystal reference are directly reusable. The low single-unit price as of 2026-10-20 also suits hobbyist-scale board runs, while tape-and-reel availability supports small commercial production of reproduction hardware.
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추천 제품 요약
엔지니어링 참조 데이터: AD725ARZ-RL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD725ARZ | AD725AR-RL | AD725AR |
|---|---|---|---|---|
| Package | 16-SOIC (7.50 mm) | 16-SOIC (7.50 mm) - same | 16-SOIC (7.50 mm) - same | 16-SOIC (7.50 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Video Standards | NTSC and PAL | NTSC and PAL | NTSC and PAL | NTSC and PAL |
| Output Types | Composite + S-Video (Y/C) | Composite + S-Video (Y/C) | Composite + S-Video (Y/C) | Composite + S-Video (Y/C) |
| Luma Trap Port (YTRAP) | Yes | Yes | Yes | Yes |
| Power-Down Current | < 1 uA | < 1 uA | < 1 uA | < 1 uA |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tube |
| Finish / RoHS Variant | Z (RoHS-friendly finish) | Z (same finish) | Legacy (non-Z) finish | Legacy (non-Z) finish |
| Drop-In Compatibility | Reference | Pin-to-pin, identical die | Pin-to-pin, identical die | Pin-to-pin, identical die |
주요 차별점
- RoHS-friendly Z-suffix finish in tape-and-reel (vs AD725AR-RL)
- Automated assembly packaging at identical cost class (vs AD725ARZ)
- Dual-standard output flexibility with sub-1 uA shutdown (vs AD725AR)
설계 노트
Use the YTRAP pin exactly as specified in the AD725 datasheet application circuit: the external trap network tunes out subcarrier-frequency components from the luminance path. Without it, chroma energy leaking into luma shows up as rainbow shimmer on fine detail (stripes, text edges) in the composite output. Use accurate inductor and capacitor values with low-loss components, and verify the trap response at the NTSC (3.58 MHz) or PAL (4.43 MHz) subcarrier frequency appropriate to your configured standard.
Keep the analog video output traces short and route them away from the subcarrier crystal and digital RGB/sync lines to minimize crosstalk into the encoded video. Place decoupling capacitors close to the supply pins of the AD725, and ground the SOIC-16 device with a clean analog ground return. Since the encoder output feeds 75-ohm video loads, maintain controlled impedance and correct output back-termination to avoid reflections that appear as ghosting in the composite picture.
Exploit the power-down mode for battery designs: the AD725 draws less than 1 uA when shut down per the datasheet, so a GPIO from the system MCU can gate the video stage. Estimated: even at a modest 20 mA active current, a duty cycle of 1% active / 99% shutdown cuts average encoder consumption to roughly 0.2 mA plus leakage, which materially extends battery life in portable testers and handhelds. Confirm exact active-mode current from the datasheet electrical characteristics table for your supply conditions.
Do not confuse AD725 ordering codes when releasing the BOM: -RL means tape and reel, and the Z suffix denotes the RoHS-friendly lead-finish variant; mixing AD725AR (legacy finish, tube) into a RoHS assembly line can create compliance documentation issues even though the die is identical. Also verify that your graphics source provides RGB levels and sync timing matching the datasheet input requirements before layout sign-off.
규정 준수 정보
The Z suffix in Analog Devices nomenclature conventionally denotes the RoHS-friendly lead finish, but explicit RoHS/REACH declarations were not present in the retrieved web data; verify on the official ADI product page before compliance sign-off.
