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NXP Semiconductors TDA18250HN/C1,557
- Part No.:
- TDA18250HN/C1,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Video Processing
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TDA18250HN/C1,557.pdf
- Description:
- IC VIDEO TUNER 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,099
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Product details
Overview
TDA18250HN/C1,557 from NXP Semiconductors is a single-stream silicon cable tuner IC for HD Set-Top Boxes, supporting worldwide digital cable standards including DVB-C and ITU-T J.83B. It delivers 42–1002 MHz RF coverage, 5–5.5 dB noise figure, and low-power 0.91 W dissipation while eliminating external SAW filters and LNAs in STB front-end designs.
For engineers reviewing the TDA18250HN/C1,557 datasheet, TDA18250HN/C1,557 pinout, TDA18250HN/C1,557 application, or TDA18250HN/C1,557 equivalent, key selection criteria include RF frequency range, integrated IF selectivity, LIF output architecture, I²C-based RSSI/temperature monitoring, and HVQFN48 thermal-enhanced packaging for high-density STB layouts.
Technical Context
The TDA18250HN/C1,557 implements a fully integrated PLL-based synthesizer with on-die 16 MHz crystal oscillator buffer, enabling single-crystal system design. Its low-IF (LIF) architecture outputs differential IFO_P/IFO_N signals at fixed IF, bypassing image-rejection tuning complexity.
It integrates dual AGC loops (AGC1/AGC2), RF loop-through (LT), and alignment-free calibration-eliminating factory tuning steps. The device uses a 3.3 V single supply and meets JEDEC Class IV ESD robustness (2 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 42–1002 MHz - Covers full global cable spectrum including EuroDOCSIS and North American QAM channels. |
| Noise Figure | 5.0 dB (42–862 MHz), 5.5 dB (>862 MHz) - Enables reliable reception of weak cable signals without external LNA. |
| Power Dissipation | 0.91 W - Supports thermally constrained STB PCBs without forced cooling. |
| Image Rejection | 50–62 dB - Meets stringent adjacent-channel rejection requirements for dense QAM-256 deployments. |
| Phase Noise | −85 dBc/Hz @ 10 kHz, −105 dBc/Hz @ 100 kHz - Ensures low BER in high-order modulation schemes. |
| Supply Voltage | 3.3 V ±10% - Directly interfaces with standard STB power rails; no level-shifting required. |
| Max Input Power | +106 dBµV - Withstands strong upstream cable ingress without saturation or distortion. |
Pinout & Package
HVQFN48 (SOT619-1), 7 × 7 × 0.85 mm, thermally enhanced, leadless package with exposed thermal pad. Designed for reflow soldering and high thermal conductivity in compact STB modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IN | RF input port | Accepts unfiltered cable signal up to +106 dBµV; internal ESD protection per JEDEC Class IV. |
| LT | RF loop-through output | Drives secondary tuner in PVR architectures; maintains signal integrity without external buffering. |
| IFO_P / IFO_N | Differential LIF output | Provides 4-MHz centered low-IF signal to demodulator; eliminates need for external IF filtering. |
| SCL / SDA | I²C-bus interface | 3.3 V-compatible control bus for configuration, RSSI readback, and die temperature monitoring. |
| XTAL_P / XTAL_N | Crytal oscillator terminals | Supports 16 MHz fundamental-mode crystal; internal buffer enables single-crystal dual-tuner synchronization. |
| VIFAGC | IF AGC voltage output | Analog voltage proportional to IF signal level; used for system-level gain optimization or diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated IF selectivity | Replaces discrete SAW filters and matching networks-reducing BOM count by ≥5 components and PCB area by >15 mm². |
| Alignment-free calibration | Factory-trimmed DC offset and gain matching eliminate production line tuning steps and associated test fixtures. |
| RF loop-through with gain stability | Maintains ±0.5 dB gain flatness across 42–1002 MHz-enabling cascaded tuner architectures without external equalization. |
| Integrated 16 MHz crystal buffer | Drives two TDA18250HN/C1,557 devices from one crystal-reducing component cost and board space in PVR STBs. |
| I²C-accessible RSSI & temperature | Enables real-time signal health monitoring and thermal derating without adding ADC or sensor ICs. |
Applications
| Cable Set-Top Box (DVB-C) | PVR Dual-Tuner Architecture |
|---|---|
Use Scenario: High-definition digital cable reception in consumer STBs deployed globally. IC Role / Device Role / Timing Role: Primary RF tuner converting cable spectrum to low-IF for downstream QAM demodulation. Use Value: Eliminates external SAW filters and LNAs, reducing front-end BOM cost by ~$0.35/unit and improving MTBF via fewer passive components. |
Use Scenario: Simultaneous record-and-play functionality requiring independent RF paths. IC Role / Device Role / Timing Role: Master tuner providing RF loop-through and synchronized 16 MHz clock to slave tuner. Use Value: Enables precise inter-tuner timing alignment using shared crystal-avoiding clock domain crossing issues in multi-stream decoding. |
| Multi-Room DVR Hub | Cable Modem Termination System (CMTS) Test Equipment |
Use Scenario: Centralized cable signal distribution to multiple client STBs in residential gateways. IC Role / Device Role / Timing Role: High-linearity tuner front-end with stable LT output for signal splitting and amplification. Use Value: 62 dB image rejection ensures clean channel separation across 100+ QAM channels-critical for low-error-rate multi-room streaming. |
Use Scenario: Lab-grade signal analysis and CMTS upstream/downstream verification. IC Role / Device Role / Timing Role: Calibrated RF receiver stage with traceable RSSI and die temperature telemetry. Use Value: On-chip RSSI accuracy ±1.5 dB and embedded temperature sensor enable automated gain calibration without external instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar cable tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3541ETJ+T | Higher 1.2 W power dissipation; requires external 26 MHz TCXO; no integrated crystal buffer. | Targeted at broadband access terminals with wider IF bandwidth; lacks RF loop-through. | Select when wider IF bandwidth (>6 MHz) or higher input IP3 is required; verify thermal margin for STB enclosure. |
| SI2151-A10-GM | Lower 3.6 V supply requirement; supports DVB-C/DVB-T/ATSC; no LIF output-uses zero-IF architecture. | Used in hybrid broadcast receivers; incompatible with legacy LIF demodulators. | Choose for multi-standard broadcast platforms; not drop-in compatible due to IF architecture and pinout mismatch. |
Compared with MAX3541ETJ+T and SI2151-A10-GM, the TDA18250HN/C1,557 uniquely combines LIF output, integrated crystal buffer, and RF loop-through in a single 3.3 V, 0.91 W solution-making it optimal for cost-sensitive, space-constrained DVB-C STBs requiring PVR support.
Availability
TDA18250HN/C1,557 is available at Aetrix Electronics and suitable for cable Set-Top Boxes, PVR systems, and multi-room DVR hubs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TDA18250HN/C1,557 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
NXP Semiconductors is a Dutch semiconductor company specializing in secure connectivity solutions for automotive, industrial, and consumer electronics, with leadership in RF, analog, and mixed-signal ICs.
The TDA18250HN/C1,557 belongs to NXP's silicon tuner product line, engineered specifically for cost-optimized, high-performance digital cable reception in Set-Top Box applications-prioritizing integration, thermal efficiency, and multistandard compliance.
FAQ
What RF standards does the TDA18250HN/C1,557 support?
The TDA18250HN/C1,557 supports all major digital cable standards including DVB-C (EN 300 429), ITU-T J.83B (North American QAM), and related regional variants. Its 42–1002 MHz RF coverage and integrated IF selectivity ensure compliance with spectral mask and adjacent-channel rejection requirements defined in these standards-without requiring external filtering components.
Does the TDA18250HN/C1,557 require an external crystal oscillator?
No-the TDA18250HN/C1,557 includes a fully integrated 16 MHz crystal oscillator with output buffer. When a 16 MHz fundamental-mode crystal is connected to XTAL_P/XTAL_N, the internal buffer drives both the TDA18250HN/C1,557 itself and a second tuner in PVR configurations-eliminating the need for external oscillator ICs or clock buffers.
How does the TDA18250HN/C1,557 handle RF loop-through functionality?
The TDA18250HN/C1,557 provides a dedicated LT pin that delivers a buffered, gain-stabilized copy of the RF_IN signal across 42–1002 MHz with ±0.5 dB flatness. This enables direct connection to a slave tuner's RF input in PVR systems-no external amplifiers or matching networks are needed, preserving signal integrity and simplifying layout.
What thermal management features does the TDA18250HN/C1,557 include?
The TDA18250HN/C1,557 uses an HVQFN48 package (SOT619-1) with an exposed thermal pad optimized for PCB heat sinking. Its 0.91 W typical power dissipation and thermal resistance design allow operation within safe junction temperatures (<125°C) in sealed STB enclosures-even at ambient temperatures up to 70°C-without heatsinks or airflow.
Can the TDA18250HN/C1,557 replace older can-type tuners in existing STB designs?
The TDA18250HN/C1,557 is not a mechanical or electrical drop-in replacement for legacy can tuners due to its LIF output architecture, I²C control interface, and HVQFN48 footprint. Migration requires redesign of the IF path, removal of SAW filters/LNAs, and firmware updates for I²C register programming-but yields significant BOM and board-area savings.
TDA18250HN/C1,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Tuner
- Applications:
- Consumer Video
- Standards:
- -
- Control Interface:
- I2C
- Voltage - Supply:
- 3.3V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-HVQFN (7x7)
TDA18250HN/C1,557 FAQ
1.How can I place an order for TDA18250HN/C1,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA18250HN/C1,557 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 TDA18250HN/C1,557 reliable?
The price and inventory of TDA18250HN/C1,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA18250HN/C1,557 is usually 5 days.
3.What payment methods are accepted for TDA18250HN/C1,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA18250HN/C1,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA18250HN/C1,557?
TDA18250HN/C1,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA18250HN/C1,557 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 TDA18250HN/C1,557?
For technical support, including TDA18250HN/C1,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA18250HN/C1,557 requirements.
6.How does Aetrix verify that TDA18250HN/C1,557 is sourced from the original manufacturer or authorized distributors?
All TDA18250HN/C1,557 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 TDA18250HN/C1,557 meets industry standards.
7.What is the process for return or replacement of TDA18250HN/C1,557?
All TDA18250HN/C1,557 units undergo pre-shipment inspection (PSI). If there is an issue with TDA18250HN/C1,557, 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 TDA18250HN/C1,557 part is unused and in its original packaging.
Return procedure for TDA18250HN/C1,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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