Overview
The TDA18250BHN/C1518, produced by NXP USA Inc., is a highly integrated cable silicon tuner designed for digital cable and terrestrial TV reception. This component is notable for its low power consumption, high linearity, and very low noise figure, making it an ideal choice for modern television and set-top box applications. The tuner integrates several key components, including low-noise amplifiers, surface acoustic wave (SAW) filters, and a crystal oscillator, thereby reducing the overall system cost and complexity.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| RF Frequency Range | - | 42 | - | 1002 | MHz |
| Tuner Noise Figure (fRF < 862 MHz) | 75 Ω; maximum gain | -3.8 | - | - | dB |
| Tuner Noise Figure (fRF ≥ 862 MHz) | 75 Ω; maximum gain | -4.1 | - | - | dB |
| Phase Jitter (250 Hz to 4 MHz) | - | 0.4 | 0.6 | - | Degree |
| Image Rejection (IF = 5 MHz) | RF (image) level ≥ 60 dBμV | -62 | - | - | dB |
| Maximum Input Power (single channel) | - | -115 | - | - | dBμV |
| Power Dissipation | - | - | 0.740 | - | W |
| Supply Voltage | - | -0.3 | - | 3.60 | V |
| ESD Protection (RF_IN and LT pins) | EIA/JESD22-A114 (HBM) | - | - | 8 | kV |
Key Features
- Low power consumption and high linearity
- Very low noise figure
- Flexible low IF output from 3 MHz to 7.5 MHz for easy matching with various demodulators
- RoHS compliant
- I2C-bus interface compatible with 3.3 V microcontrollers
- Strong immunity to wireless interferers (WLAN, GSM, LTE)
- Multi-reference clock frequency compliant: 16 MHz, 24 MHz, 25 MHz, 27 MHz, and 30 MHz
- Crystal oscillator output buffer to drive demodulator, SoC, or slave tuner
- Slave Tuner Output (STO) and integrated splitter for dual tuner applications
- Fully integrated oscillators
- Single-ended RF input (no need for external balun)
- Enhanced ESD protection (8 kV HBM) on RF_IN and LT pins
- Alignment free and excellent return loss compatible with cable requirements
- Integrated RSSI function and temperature sensor
- Integrated gain control
Applications
The TDA18250BHN/C1518 is primarily used in digital cable and terrestrial TV reception systems. It is suitable for a variety of applications including:
- Set-top boxes
- Digital video recorders (DVRs)
- Integrated digital TVs
- Cable and satellite receivers
- Hybrid set-top boxes combining multiple broadcast standards
Q & A
- What is the RF frequency range of the TDA18250BHN/C1518?
The RF frequency range is from 42 MHz to 1002 MHz. - What is the typical noise figure of the tuner for frequencies below 862 MHz?
The typical noise figure is -3.8 dB. - Does the TDA18250BHN/C1518 have integrated SAW filters?
No, it does not require external SAW filters due to its fully integrated IF and RF selectivity. - What is the maximum input power for a single channel?
The maximum input power for a single channel is -115 dBμV. - Is the TDA18250BHN/C1518 RoHS compliant?
Yes, it is RoHS compliant. - What is the power dissipation of the TDA18250BHN/C1518?
The power dissipation is 0.740 W. - What type of interface does the TDA18250BHN/C1518 use for communication?
It uses an I2C-bus interface compatible with 3.3 V microcontrollers. - Does the TDA18250BHN/C1518 have ESD protection?
Yes, it has enhanced ESD protection (8 kV HBM) on RF_IN and LT pins. - What are the supported reference clock frequencies?
The supported reference clock frequencies are 16 MHz, 24 MHz, 25 MHz, 27 MHz, and 30 MHz. - Does the TDA18250BHN/C1518 require an external balun for RF input?
No, it has a single-ended RF input and does not require an external balun.
