ADV7321KSTZ - 216MHz Multiformat HD Video Encoder | Analog Devices
料号： ADV7321KSTZ ✓ 量产中ADV7321KSTZ 概述
A video encoder is a mixed-signal device that sits at the end of a video processing pipeline, converting digital video streams (typically parallel YCrCb or RGB data) into industry-standard analog waveforms for display, recording, or broadcast. Video encoders form part of the video encoder family within analog front-end ICs, which in turn belong to the broader power-and-signal-chain semiconductor hierarchy alongside ADCs, DACs, and interface ICs. The ADV7321 integrates the DAC conversion, interpolation filters, and analog drive circuitry on a single monolithic chip.
Key features include six NSV (noise-shaped video) 12-bit DACs operating at up to 216 MHz, TTL-compatible input ports accepting 8-/10-, 16-/20-, and 24-/30-bit data, and full compliance with SMPTE video standards including SMPTE 296M (720p at 74.25 MHz) and SMPTE 240M (1035i), plus 10-bit 4:4:4 RGB. NTSC and PAL standard-definition encoding is supported alongside HD formats.
The NSV DAC architecture uses noise shaping and oversampling to move quantization noise out of the video band, improving signal-to-noise ratio and picture quality compared with conventional Nyquist-rate video DACs. Separate input ports allow simultaneous handling of high-definition and standard-definition data streams, simplifying dual-output designs.
Typical applications include DVD players and recorders (CGMS-A copy-protection support for 625p outputs), EVD players, progressive-scan and HDTV set-top outputs, and professional video test equipment.
Design consideration: provide a clean low-noise 2.5 V analog supply and follow the manufacturer's recommended decoupling, since DAC noise performance directly sets output video SNR.
This page adds drop-in alternative analysis, application guidance, and comparison tables that go beyond the manufacturer datasheet alone.
直接替换替代料： ADV7321KSTZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADV7321KSTZ （相同外形与封装尺寸） ——差异在于 DAC Resolution, Package, Copy Protection, High-Definition Input Formats, Product Type.
ADV7320KSTZ
✅ 直接替换联系询价
查看数据手册 →ADV7324KSTZ
✅ 直接替换📋 参考替代料（不在目录中）
ADV7314KST
✅ 直接替换联系询价
查看数据手册 →ADV7321KSTZ 规格参数
| 功能 | Digital-to-analog video encoder |
| Number of DACs | 6 |
| DAC Resolution | 12-bit (NSV) |
| Maximum Pixel Clock | 216 MHz |
| Video Output Formats | CVBS, S-Video, YPbPr, RGB |
| Video Standards | NTSC, PAL, SD / progressive scan / HDTV |
| HD Compliance | SMPTE 296M (720p), SMPTE 240M (1035i) |
| Input Ports | Separate 8-/10-, 16-/20-, 24-/30-bit parallel ports |
| Input Format | 4:2:2 and 4:4:4 parallel YCrCb, 10-bit 4:4:4 RGB |
| Input Interface Level | TTL-compatible |
| 电源电压 | 2.5 V |
| Copy Protection | CGMS-A support for 625p outputs |
| 封装 | 64-LQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| Applications | EVD, DVD, SD/PS/HDTV |
| Architecture | Single monolithic chip, high-speed NSV DACs |
ADV7321KSTZ 64-lqfp (10x10 mm) 引脚配置指南
ADV7321KSTZ（64-lqfp (10x10 mm) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ADV7321KSTZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADV7321KSTZ 适用于 6 应用s: DVD Players and Recorders, HDTV and Progressive Scan Outputs, EVD Players, Video Test and Measurement Equipment, Set-Top Box Video Output, Industrial Video Monitors and Security Systems.
DVD Players and Recorders
The ADV7321KSTZ is purpose-built for DVD player and recorder analog video output. Its six NSV 12-bit DACs drive CVBS, S-Video, and component YPbPr outputs simultaneously from SD or progressive-scan digital video streams, and CGMS-A support for 625p outputs lets the product satisfy industry copy-protection requirements. Placed after the MPEG decoder's digital video output bus, the encoder accepts 8-/10- or 16-/20-bit YCrCb data with TTL levels, applies interpolation filtering, and delivers broadcast-standard analog waveforms. The NSV noise-shaping architecture moves quantization noise out of the video band, visibly improving picture quality on both CRT and flat-panel displays.
推荐
HDTV and Progressive Scan Outputs
For set-top boxes and displays requiring 720p or 1035i analog component output, the ADV7321KSTZ supports SMPTE 296M and SMPTE 240M formats at pixel clocks up to 74.25 MHz within its 216 MHz capability. Its separate HD and SD input ports allow a single device to serve both a high-definition YPbPr/RGB output and a standard-definition CVBS/S-Video output, reducing BOM count. The 4:4:4 10-bit RGB input mode supports graphics overlays and OSD insertion before conversion. Designers should budget clean 2.5 V analog supply rails and follow the datasheet's output filter recommendations to preserve HD signal fidelity over component cable runs.
推荐
EVD Players
Enhanced Versatile Disc (EVD) players, common in the Chinese consumer market, require high-quality analog video output from compressed disc content, and the ADV7321KSTZ is listed by Analog Devices as an EVD target application. The encoder's 12-bit NSV DACs provide the color depth needed for EVD's enhanced-resolution progressive formats, while the flexible 8-/10-, 16-/20-, and 24-/30-bit input ports match the wide pixel buses of EVD decoder SoCs. CGMS-A copy protection on 625p outputs supports licensed content playback. The 10x10 mm 64-LQFP package suits the compact main boards typical of consumer players, with surface-mount assembly on standard reflow lines.
推荐
Video Test and Measurement Equipment
Video signal generators and broadcast test equipment use the ADV7321KSTZ to synthesize NTSC, PAL, and HD component test patterns with precise analog timing. External horizontal, vertical, and blanking sync inputs give the test system full control over line timing, enabling non-standard pattern generation for display characterization. The six independent 12-bit DACs allow simultaneous generation of all component channels plus composite outputs, and the 216 MHz maximum rate covers all practical raster frequencies with margin. The NSV oversampling architecture reduces post-DAC filter complexity, simplifying the reconstruction filter design in precision instruments.
推荐
Set-Top Box Video Output
Digital set-top boxes convert decoded MPEG streams into analog outputs for legacy TVs, and the ADV7321KSTZ handles this conversion with its CVBS, S-Video, and YPbPr output modes from a single device. Its dual input-port architecture lets the same chip serve both the standard-definition composite output to the primary TV and a progressive or HD component output, simplifying mixed-resolution designs. TTL-compatible inputs connect directly to the transport/decoder section without level shifting, and the I2C-compatible control port allows software selection of output format, gamma, and brightness/contrast controls. The 2.5 V supply integrates with modern low-voltage board power trees.
推荐
Industrial Video Monitors and Security Systems
CCTV matrix switches, industrial video monitors, and legacy security systems still distribute analog composite video, and the ADV7321KSTZ converts digital video from network decoders or DVR processors into NTSC/PAL CVBS for coaxial distribution. Its 12-bit DAC resolution maintains grayscale accuracy across long cable runs, and the noise-shaped oversampling output requires only a simple analog low-pass filter before the 75-ohm line driver stage. External sync inputs permit genlocking to a house reference in multi-camera installations. The robust monolithic construction and wide format coverage make it a single-chip solution for mixed SD/PS output requirements in surveillance head-ends.
推荐
推荐产品汇总
工程参考数据： ADV7321KSTZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADV7320KSTZ | ADV7324KSTZ | ADV7314KST |
|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP - verify suffix variant |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Target Applications | EVD, DVD, SD/PS/HDTV | SD/PS/HDTV, enhanced performance | SD/PS/HDTV encoder | SD/PS/HDTV encoder (earlier generation) |
关键差异点
- CGMS-A copy-protection support on 625p outputs （对比 ADV7320KSTZ)
- Six NSV 12-bit DACs versus conventional video encoders （对比 ADV7314KST)
- Separate SD and HD input ports （对比 ADV7324KSTZ)
设计说明
The ADV7321KSTZ operates from a 2.5 V supply, and DAC supply noise translates directly into output video noise. Use a low-noise LDO or well-filtered rail for the analog supply, decouple each supply pin with 0.1 uF ceramic capacitors placed within a few millimeters of the pin, and add bulk 10 uF capacitance per supply domain. Estimated: a switching regulator's output ripple can appear on the DAC outputs; a ferrite bead plus ceramic filter between the switcher and the analog pins typically reduces video-band ripple substantially.
Keep the six DAC analog output traces short, direct, and impedance-controlled (75-ohm video environment) with a continuous ground plane beneath them. Do not route digital pixel bus traces under or parallel to the analog outputs; the 216 MHz-class pixel clocks contain harmonics that can couple into the video band. Provide an external horizontal/vertical/blanking sync path per the datasheet typical application circuit, and follow the manufacturer's recommended output reconstruction filter topology before the 75-ohm back-termination.
TTL-compatible pixel inputs require stable clocking - hold-together skew between the pixel clock and data bus can cause pixel-edge sampling errors visible as vertical striping. Verify the input port width configuration (8-/10-, 16-/20-, or 24-/30-bit) in the control register matches your bus wiring before bring-up, since a misconfigured port width yields shifted or blank video. For DVD applications, enable CGMS-A on 625p outputs during compliance testing rather than as an afterthought.
合规信息
The KSTZ suffix on Analog Devices parts conventionally indicates the RoHS-compliant lead-free package option, but explicit compliance status should be confirmed on the Analog Devices product page before final sourcing decisions.
