AD9873JS - 232 MHz Mixed-Signal AFE | Analog Devices
Référence : AD9873JS ✗ Fin de vie| Qté | Prix unitaire | Total |
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| 10 | $0 | $0,00 |
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| 1 000 | $0 | $0,00 |
AD9873JS Présentation
A mixed-signal analog front-end, or AFE, combines analog signal acquisition and conversion functions with digital processing and interface functions on one integrated circuit. In the AD9873JS, this integration includes multiple ADC channels and a quadrature digital up-converter, allowing a system to receive and transmit broadband signals while limiting external component count. Its architecture is positioned for cost-sensitive broadband equipment where size, power dissipation, and dynamic performance are important.
The verified manufacturer material identifies a 232 MHz quadrature digital transmitter, output bandwidth up to 65 MHz, and a 12-bit TxDAC+ direct IF digital-to-analog converter. The receive section includes four ADCs with different resolutions: one 12-bit ADC, one 10-bit ADC, and two 8-bit ADCs. Two sigma-delta control DACs support control functions within the mixed-signal signal chain. The AD9873JS is identified as a 3.3 V CMOS analog front-end converter for MCNS-DOCSIS, DVB, and DAVIC-compliant set-top-box and cable-modem applications.
The AD9873JS combines a transmit path and multichannel receive path in one device, reducing the number of separate conversion and modulation blocks required by a broadband front end. The 232 MHz transmitter section is intended for quadrature digital signal generation, while the multichannel ADC section supports video and digital-data reception. This makes the device relevant to cable-modem headends, set-top-box receiver designs, DVB systems, and other broadband communication equipment requiring multiple conversion functions.
Typical implementation requires careful attention to analog input conditioning, clocking, digital data timing, power distribution, and PCB layout. Because the device integrates several high-speed and precision functions, decoupling and controlled return paths are essential for minimizing noise and crosstalk. The external interface and pin arrangement should be verified against the complete Analog Devices datasheet before PCB release, especially when matching the AD9873JS variant and its 100-lead MQFP footprint.
This page consolidates the verified AD9873JS product description, package identification, conversion features, application positioning, sourcing references, and design-oriented guidance. It also records where detailed electrical limits, timing values, pricing, pin assignments, and lifecycle information were not present in the supplied verified data, rather than inferring them.
Alternatives de remplacement direct pour AD9873JS — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
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| Product Type | Mixed-signal analog front-end converter |
| Transmitter Clock Frequency | 232 MHz quadrature digital transmitter |
| Transmitter Output Bandwidth | Up to 65 MHz |
| Primary Transmit DAC Resolution | 12-bit TxDAC+ direct IF DAC |
| Primary ADC Resolution | 12-bit |
| Secondary ADC Resolution | 10-bit |
| Additional ADC Channels | Two 8-bit ADCs |
| ADC Channel Count | Four ADC channels |
| Control DACs | Two sigma-delta control DACs |
| Tension d'alimentation | 3.3 V CMOS |
| Target Standards and Applications | MCNS-DOCSIS, DVB, DAVIC-compliant set-top-box and cable-modem applications |
| Application Domain | Broadband communications |
| Boîtier | 100-lead MQFP (14x20) |
| Type de montage | Surface mount |
Guide de configuration des broches du AD9873JS 100-lead mqfp (14x20)
Configuration des broches du AD9873JS (boîtier 100-lead mqfp (14x20)). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour AD9873JS.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AD9873JS convient pour 7 applications: Cable Modem Signal Chain, Set-Top-Box Receiver, Digital Video and Data Receiver, DVB Signal Processing, DAVIC-Compatible Cable Equipment, Broadband IF Modulation, Multichannel Communication Front End.
Cable Modem Signal Chain
AD9873JS fits cable-modem designs that combine a high-speed digital transmit path with multiple receiver conversion channels. The verified manufacturer description identifies a 232 MHz quadrature digital transmitter, a 12-bit primary ADC, a 10-bit ADC, two 8-bit ADCs, and two sigma-delta control DACs in one device. This integration can simplify a broadband front end by reducing the number of separate converter blocks around the modulation and demodulation sections. The designer should still validate clock distribution, analog input levels, channel bandwidth, interface timing, and PCB signal integrity against the complete datasheet. AD9873JS is most appropriate when the product architecture matches the documented cable-modem use case rather than when a generic low-power ADC is sufficient.
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Set-Top-Box Receiver
AD9873JS is identified by Analog Devices for cable set-top-box applications and is suited to systems processing multiple video or digital-data signals. Its receiver section combines a 12-bit ADC, a 10-bit ADC, and two 8-bit ADCs, while the transmitter section supports quadrature digital modulation at up to 65 MHz output bandwidth. Using one mixed-signal front end can reduce external conversion circuitry and board partitioning. In practice, the design team must verify the required channel count, conversion rates, video bandwidth, carrier plan, and external clock architecture. The component is more suitable than a simple ADC when transmit modulation and multichannel reception must be consolidated.
Recommandé
Digital Video and Data Receiver
The multichannel ADC arrangement makes AD9873JS relevant to broadband receivers handling video and digital data signals. The manufacturer product page describes one 12-bit ADC, one 10-bit ADC, and two 8-bit ADCs, providing different conversion resolutions for receiver functions. This mixed-resolution architecture can be useful when the system requires higher resolution for a primary signal path and lower-cost conversion for auxiliary channels. Actual signal-chain performance depends on input bandwidth, sampling clock accuracy, dynamic range, channel bandwidth, and downstream filtering. The verified data does not provide all timing or dynamic-range limits, so the complete datasheet should be used for channel-budget calculations and analog front-end design.
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DVB Signal Processing
AD9873JS is suitable for DVB-oriented broadband signal-processing equipment because Analog Devices identifies DVB-compliant set-top-box and cable-modem applications. The 232 MHz quadrature digital transmitter and 65 MHz output bandwidth provide a transmit modulation function, while the four ADC channels support receiver-side conversion. In a DVB design, the component can help consolidate functions that would otherwise require separate transmitter, ADC, and control-DAC blocks. Its use should be conditioned on matching the required DVB channel bandwidth, sample rates, interface format, and analog gain distribution. Since the verified snippets do not provide all DVB-specific timing or electrical limits, those values must be checked in the manufacturer documentation before schematic release.
Recommandé
DAVIC-Compatible Cable Equipment
AD9873JS is identified for DAVIC-compliant cable set-top-box and cable-modem equipment, making it applicable to legacy and regional broadband receiver designs. The integrated transmitter, multichannel ADCs, and sigma-delta control DACs provide a broad mixed-signal foundation rather than a standalone data converter. This can be advantageous when a product must combine modulation, multiple reception paths, and control functions within a compact board area. The design still needs channel-specific gain, filtering, clock distribution, and impedance-control decisions. Confirm that the exact AD9873JS ordering option, package, and electrical limits satisfy the target product requirements; the verified data does not state DAVIC certification or test results.
Recommandé
Broadband IF Modulation
AD9873JS can be used in broadband intermediate-frequency modulation systems because it includes a 232 MHz quadrature digital up-converter and a 12-bit TxDAC+ direct IF DAC. The transmitter output bandwidth reaches 65 MHz according to the verified Analog Devices material, making it relevant to IF generation for cable and broadband systems. In implementation, the digital data path, interpolation or filtering stages, clock source, and analog reconstruction network must be matched to the desired modulation bandwidth. The integrated receiver ADCs also allow transmit and receive functions to coexist in one device. Exact DAC linearity, clock requirements, and output-level limits remain unavailable in the supplied snippets and must be verified before selecting external analog components.
Recommandé
Multichannel Communication Front End
AD9873JS suits multichannel broadband communication equipment where a compact mixed-signal solution is more valuable than isolated converter ICs. The device combines four ADC channels with a 232 MHz quadrature transmitter and two sigma-delta control DACs, allowing a single package to support several receive and control paths. This consolidation can reduce component count and simplify board partitioning compared with a design built from separate ADC, DAC, and modulation blocks. The tradeoff is reduced flexibility: channel bandwidth, sampling clocks, analog input ranges, digital interfaces, and control-loop behavior must all match the integrated device. Use the complete AD9873 documentation for signal-integrity layout, power sequencing, and thermal analysis rather than assuming generic converter guidelines apply.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AD9873JS — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AD9873 | AD9873JS |
|---|---|---|---|
| Product Type | Mixed-signal analog front-end converter | AD9873 family identification | Mixed-signal analog front-end converter |
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Transmitter Clock Frequency | 232 MHz | 232 MHz family feature | 232 MHz |
| Transmitter Output Bandwidth | 65 MHz maximum | 65 MHz family feature | 65 MHz maximum |
| Transmit DAC Resolution | 12-bit TxDAC+ | 12-bit TxDAC+ family feature | 12-bit TxDAC+ |
| ADC Channel Count | 4 channels | 4 channels family feature | 4 channels |
| ADC Resolutions | 12-bit, 10-bit, 8-bit, 8-bit | 12-bit, 10-bit, 8-bit, 8-bit family feature | 12-bit, 10-bit, 8-bit, 8-bit |
| Control DACs | 2 sigma-delta | 2 sigma-delta family feature | 2 sigma-delta |
| Supply Voltage | 3.3 V CMOS | 3.3 V CMOS family feature | 3.3 V CMOS |
Principaux différenciateurs
- Integrated broadband transmit and receive functions (vs AD9873)
- Mixed-resolution receiver architecture (vs AD9873)
- High-bandwidth quadrature modulation (vs AD9873JS)
Notes de conception
Design the AD9873JS power distribution around the verified 3.3 V CMOS supply requirement and separate high-current digital paths from sensitive analog returns. The supplied data does not provide recommended capacitor values, current limits, sequencing requirements, or power-consumption figures, so these values must be taken from the complete manufacturer datasheet and reference circuitry. Estimated thermal calculations should not be performed until the actual VIN, VOUT, clock rate, channel utilization, and ambient temperature are known.
Route the AD9873JS analog, digital, clock, and ground paths with controlled impedance and short return paths. Because the device combines a 232 MHz transmitter with four ADC channels, keep high-speed digital activity away from sensitive analog inputs and use a continuous ground reference wherever practical. The verified data does not specify trace lengths or stack-up requirements; derive those constraints from the complete datasheet clocking and interface sections before release.
Validate the complete clock and data path with the system's actual sampling rate rather than only the 232 MHz transmitter headline. Check clock jitter, data timing, analog input bandwidth, filtering, output reconstruction components, and channel-to-channel crosstalk. The supplied material confirms 65 MHz transmitter output bandwidth and four ADC channels, but it does not provide dynamic-range, jitter, settling-time, or crosstalk limits; obtain those specifications from the manufacturer datasheet before sizing external components.
Informations de conformité
The supplied verified search results identify the product and its communications applications but do not provide current RoHS, REACH, halogen-free, lead-free, conflict-minerals, or AEC-Q100 status. Compliance must be confirmed from the current Analog Devices product documentation or supplier declarations.
