Overview
The TDA10025HN/C1, produced by NXP USA Inc., is a Dual Cable Downstream Processor (CDP) designed to implement the physical interfaces and protocols necessary for high-quality services in in-band DOCSIS, EuroDOCSIS, DVB, and OpenCable Set-Top Boxes (STBs). This component digitizes downstream signals using a 12-bit Analog to Digital Converter (ADC) and processes them through demodulation and Forward Error Correction (FEC) blocks, supporting various modulation schemes and standards such as ITU-T J83 Annex A, B, and C.
Key Specifications
| Symbol | Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| P | Power dissipation (Standby mode) | All 3 ADC in Power-down mode and all clocks disabled | - | 10 | 30 | mW |
| P | Power dissipation (Operation mode) | 1.2 V supply voltage; 2 simultaneous DVB-C demodulations (256 QAM 6.9 Msps) | - | 205 | 280 | mW |
| Ptot | Total power dissipation | 2 simultaneous DVB-C demodulations (256 QAM 6.9 Msps) | - | 235 | 330 | mW |
| VDD(1V2) | Supply voltage (1.2 V) | - | 1.15 | 1.2 | 1.3 | V |
| VDD(3V3) | Supply voltage (3.3 V) | - | 3.0 | 3.3 | 3.6 | V |
| VIH | HIGH-level input voltage | VDD(3V3) related input levels | 2.0 | - | VDD(3V3) + 0.5 | V |
| VIL | LOW-level input voltage | - | -0.5 | - | 0.8 | V |
| Tstg | Storage temperature | - | -40 | - | 150 | °C |
| Tj | Junction temperature | - | - | 120 | °C |
Key Features
- Support for QPSK, 16 QAM, 32 QAM, 64 QAM, 128 QAM, and 256 QAM demodulation
- ITU-T J83 Annex A, B, and C FEC support
- Transport Stream Multiplex Frame (TSMF) module for Annex C compliance
- Time interleaved parallel mode or serial mode for Transport Stream (TS) interface
- On-chip PLL for crystal frequency multiplication (16 MHz external)
- Reuse of the tuner clock, saving one crystal
- Embedded 12-bit ADC
- Dual 3.3 V and 1.2 V power supplies
- Low power consumption (< 235 mW for dual stream operation)
- Small size package (48-VFQFN Exposed Pad)
- Low cost Bill Of Material (BOM)
- I²C control interface
Applications
The TDA10025HN/C1 is primarily used in consumer video applications, particularly in Set-Top Boxes (STBs) and other cable TV equipment. It supports various cable standards such as DOCSIS, EuroDOCSIS, DVB-C, and OpenCable, making it a versatile component for high-quality video and data transmission over cable networks.
Q & A
- What is the primary function of the TDA10025HN/C1?
The TDA10025HN/C1 is a Dual Cable Downstream Processor that implements the physical interfaces and protocols required for high-quality services in cable TV systems.
- Which modulation schemes does the TDA10025HN/C1 support?
The TDA10025HN/C1 supports QPSK, 16 QAM, 32 QAM, 64 QAM, 128 QAM, and 256 QAM demodulation.
- What are the supported FEC standards?
The component supports ITU-T J83 Annex A, B, and C FEC standards.
- What is the role of the TSMF module in the TDA10025HN/C1?
The TSMF module ensures compliance with Annex C standards.
- How does the TDA10025HN/C1 manage power consumption?
The component has low power consumption, with total power dissipation of less than 235 mW for dual stream operation.
- What are the supply voltage ranges for the TDA10025HN/C1?
The component operates with supply voltages of 1.15V to 1.3V and 3.0V to 3.6V.
- What is the package type of the TDA10025HN/C1?
The component is packaged in a 48-VFQFN Exposed Pad package.
- Does the TDA10025HN/C1 have an on-chip PLL?
Yes, the component includes an on-chip PLL for crystal frequency multiplication.
- What is the control interface used by the TDA10025HN/C1?
The control interface is I²C.
- In which applications is the TDA10025HN/C1 typically used?
The TDA10025HN/C1 is used in consumer video applications, particularly in Set-Top Boxes (STBs) and other cable TV equipment.
