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Analog Devices Inc. ADV7305AKST
- Part No.:
- ADV7305AKST
- Manufacturer:
- Analog Devices Inc.
- Category:
- Encoders, Decoders, Converters
- Package:
- 64-LQFP
- Datasheet:
-
ADV7305AKST.pdf
- Description:
- IC ENCODER VIDEO 14BIT 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,720
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Product details
Overview
ADV7305AKST from Analog Devices is a multiformat SD/HD video encoder IC with six 14-bit NSV™ DACs, supporting simultaneous standard definition (ITU-R BT.601/656) and high definition (SMPTE 274M/296M/293M) inputs and outputs. It delivers YPrPb progressive scan (EIA-770.1/770.2), RGB+H/V, composite NTSC/PAL, S-Video, and EuroScart RGB outputs. Used in professional studio equipment and HDTV set-top boxes requiring precise analog video reconstruction.
For engineers reviewing the ADV7305AKST datasheet, ADV7305AKST pinout, ADV7305AKST application, or ADV7305AKST equivalent, this page provides verified technical context, real-world timing behavior, confirmed DAC performance metrics, validated I²C register mapping, and functional alternatives for SD/HD video signal path design.
Technical Context
The ADV7305AKST integrates dual clock domains (CLKIN_A for HD/PS, CLKIN_B for simultaneous SD/HD), an on-chip PLL with external loop filter (EXT_LF), and independent timing generators for SD and HD paths. It supports async timing mode for arbitrary HD standards and EAV/SAV-based synchronization.
Its six 14-bit NSV DACs operate at 108 MHz (SD/PS) or 148.5 MHz (HDTV), with programmable gamma correction, adaptive/sharpness filters, and separate pedestal control per output type. Input modes include 4:2:2 and 4:4:4 YCrCb, RGB, and interleaved SD pixel formats - all configurable via I²C subaddress registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit DAC resolution enabling >84 dB theoretical SNR for broadcast-grade video fidelity |
| Luma Bandwidth (HDTV) | 30 MHz - supports full bandwidth of 1080i/720p signals without aliasing |
| Chroma Bandwidth (HDTV) | 13.75 MHz - preserves color detail in YPrPb component outputs |
| DAC Full-Scale Output | 4.33 mA typical - sets standard 1 Vpp into 150 Ω load for composite/S-Video |
| I²C Slave Address | 0x54 (7-bit) - fixed address for MPU interface; ALSB pin selects filtering mode, not address |
| Power Supply | VAA = VDD = 2.5 V ±6.25%; VDD_IO = 2.5 V/3.3 V - dual I/O supply enables mixed-voltage system interfacing |
| Operating Temperature | 0°C to +70°C - qualified for commercial industrial video equipment deployment |
Pinout & Package
ADV7305AKST is housed in a 64-lead LQFP package (ST-64B), lead-free, with exposed thermal pad. Pin functions are validated per Analog Devices datasheet Rev. A, including dedicated SD/HD input ports, dual pixel clocks, and six analog DAC outputs with individual compensation pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Y0–Y9 | HD Y data input (LSB on Y0/Y1) | 10-bit luma channel for progressive scan/HDTV; routed to DAC D in default mode |
| C0–C9 | HD Cr/Cb data input (4:2:2) or Cb (4:4:4) | 10-bit chroma port; drives DAC E; LSB on C0/C1 |
| S0–S9 | SD pixel input or HD Cr (4:4:4) | 10-bit SD port; defaults to DAC F output; supports CCIR-656/601 formats |
| DAC A–F | Analog video output terminals | DAC A/B/C: SD CVBS/Y/U; DAC D/E/F: HD Y/Pr/Pb - each with dedicated COMP pin and RSET bias |
| CLKIN_A / CLKIN_B | Pixel clock inputs | CLKIN_A: primary clock (27/81 MHz); CLKIN_B: secondary clock (27/74.25 MHz) only active in simultaneous SD/HD mode |
| SCLK / SDA / ALSB / I2C | I²C interface control | Standard 2-wire MPU interface; ALSB configures I²C noise filtering; I2C pin must be tied high for operation |
Key Features
| Feature | Design Value |
|---|---|
| NSV™ 14-bit DAC architecture | Reduces quantization noise in video band via noise shaping - improves SNR by ≥3 dB vs. conventional DACs |
| Simultaneous SD + HD processing | Independent timing generators allow concurrent 525p/625p and 720p/1080i encoding without frame buffering |
| Programmable RGB matrix | Full 3×3 YCrCb-to-RGB conversion with 10-bit coefficient precision - enables custom color space alignment |
| On-chip test pattern generator | Generates color bar, black bar, hatch, and flat field patterns - eliminates need for external pattern sources in validation |
| Macrovision Rev 7.1 support | Integrated copy protection logic for SD outputs - compliant with legacy DVD playback requirements |
Applications
| Professional Studio Equipment | HDTV Set-Top Boxes |
|---|---|
|
Use Scenario: Real-time upconversion of SD baseband feeds (CCIR-601) to HD component outputs for broadcast monitoring. IC Role / Device Role / Timing Role: ADV7305AKST acts as format translator and DAC engine - accepts 16-bit parallel SD input, applies luma/chroma filtering, and outputs synchronized YPrPb at 74.25 MHz. Use Value: Eliminates external line buffers and discrete DACs; achieves <0.6° hue accuracy and <0.5% saturation error per ITU-R BT.709. |
Use Scenario: Generating analog video outputs (composite, S-Video, RGB) from decoded MPEG-2/4 bitstreams in multi-format STBs. IC Role / Device Role / Timing Role: ADV7305AKST serves as final-stage video DAC - receives 10-bit YCrCb over parallel bus and produces simultaneous NTSC/PAL and RGB+H/V outputs. Use Value: Single-chip solution reduces BOM count by 6+ discrete DACs and associated passive filters; supports CGMS-A insertion for content protection. |
| High-End DVD Players | SD/HD Display Devices |
|
Use Scenario: Converting decoded 4:2:0 video to analog RGB or YUV for CRT/LCD displays with legacy analog inputs. IC Role / Device Role / Timing Role: ADV7305AKST performs chroma upsampling, gamma correction, and 14-bit DAC conversion - driven by 27 MHz pixel clock in SD-only mode. Use Value: Delivers 64 dB SNR (luma ramp) and <0.1% luminance nonlinearity - meets DVD Forum analog output compliance. |
Use Scenario: Driving analog inputs of professional monitors (e.g., waveform scopes, vectorscopes) from digital video processors. IC Role / Device Role / Timing Role: ADV7305AKST operates in HD-only mode with 148.5 MHz oversampling - outputs calibrated YPrPb with programmable pedestal and delay matching. Use Value: Output skew ≤1 ns and analog delay = 8 ns enable precise timing alignment across three component channels for measurement-grade accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video encoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADV7304AKST | Same pinout and core architecture, but lacks Macrovision Rev 7.1 and supports only Macrovision Rev 1.0 on SD outputs | Not suitable for DVD players requiring Rev 7.1 copy protection; otherwise identical SD/HD encoding capability | Select ADV7304AKST only when Rev 7.1 is unnecessary and cost optimization is prioritized |
| MAX9526ETL+ | Single-channel 10-bit SD encoder (NTSC/PAL only); no HD support, no I²C register access, fixed gamma | Only fits basic composite/S-Video output needs; cannot replace ADV7305AKST in multiformat or HD systems | Use MAX9526ETL+ only for cost-sensitive SD-only consumer devices where HD compatibility is irrelevant |
Compared with ADV7305AKST, ADV7304AKST offers identical HD/SD functionality minus Rev 7.1, while MAX9526ETL+ is a lower-cost, single-standard alternative with no HD capability - making ADV7305AKST the sole choice for simultaneous SD/HD broadcast-grade encoding.
Availability
ADV7305AKST is available at Aetrix Electronics and suitable for professional studio equipment, HDTV set-top boxes, and high-end DVD players requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for ADV7305AKST 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.
The ADV7305AKST belongs to Analog Devices' video encoder product line, designed specifically for multistandard broadcast video conversion - balancing precision DAC performance, flexible timing control, and integrated copy protection for professional and premium consumer video systems.
FAQ
What video standards does the ADV7305AKST support for HD output?
The ADV7305AKST supports EIA-770.1 (YPrPb progressive scan), EIA-770.2 (YPrPb progressive scan), EIA-770.3 (YPrPb HDTV), and RGB + H/V (5-wire HDTV) outputs. It complies with SMPTE274M (1080i), SMPTE296M (720p), SMPTE293M (525p), and ITU-R BT.1358 (625p) standards in both synchronous and async timing modes - all confirmed in the official datasheet Rev. A.
Does the ADV7305AKST require external resistors or capacitors for basic operation?
Yes. The ADV7305AKST requires two 1520 Ω resistors (RSET1 and RSET2) connected from pins 35 and 47 to AGND to set DAC output current. It also requires 0.1 µF capacitors from COMP1 (pin 36) and COMP2 (pin 45) to VAA for DAC stability. These values are specified in the Absolute Maximum Ratings and Pin Function Descriptions sections of the datasheet.
How does the ADV7305AKST handle simultaneous SD and HD inputs?
The ADV7305AKST uses separate input ports (S0–S9 for SD, Y0–Y9/C0–C9 for HD) and dual timing generators. When configured via Input Mode Register (subaddress 01h = 011/101/110), it processes both streams concurrently - routing SD to DACs A–C and HD to DACs D–F with independent sync insertion and filtering, as shown in Figure 9 of the datasheet.
What is the I²C slave address of the ADV7305AKST?
The ADV7305AKST has a fixed 7-bit I²C slave address of 0x54, as defined in Figure 16 of the datasheet. This differs from the ADV7304AKST (0xD4). The ALSB pin controls I²C noise filtering but does not alter the address. No external pull-up resistors are required on SDA/SCLK beyond standard I²C bus design.
Can the ADV7305AKST generate test patterns internally?
Yes. The ADV7305AKST includes an on-chip test pattern generator supporting color bars (SD), black bar (SD/HD), hatch (HD), and flat field/frame (HD) patterns. These are enabled via HD Mode Register (subaddress 11h, Bit 5) and SD Mode Register (subaddress 03h, Bit 0), eliminating need for external pattern sources during factory calibration or field diagnostics.
ADV7305AKST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Video Encoder
- Applications:
- DVD, SD/HD
- Voltage - Supply, Analog:
- 2.5V
- Voltage - Supply, Digital:
- 2.5V
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (14x14)
ADV7305AKST FAQ
1.How can I place an order for ADV7305AKST through Aetrix?
Please submit a Request for Quotation (RFQ) for ADV7305AKST 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 ADV7305AKST reliable?
The price and inventory of ADV7305AKST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADV7305AKST is usually 5 days.
3.What payment methods are accepted for ADV7305AKST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADV7305AKST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADV7305AKST?
ADV7305AKST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADV7305AKST 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 ADV7305AKST?
For technical support, including ADV7305AKST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADV7305AKST requirements.
6.How does Aetrix verify that ADV7305AKST is sourced from the original manufacturer or authorized distributors?
All ADV7305AKST 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 ADV7305AKST meets industry standards.
7.What is the process for return or replacement of ADV7305AKST?
All ADV7305AKST units undergo pre-shipment inspection (PSI). If there is an issue with ADV7305AKST, 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 ADV7305AKST part is unused and in its original packaging.
Return procedure for ADV7305AKST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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