Overview
The TDA18275HN/C1, produced by NXP USA Inc., is a high-performance hybrid silicon tuner designed for terrestrial and cable TV reception. It supports both analog and digital TV standards, delivering a Low IF (LIF) signal to a demodulator for analog TV and/or a channel demodulator for digital TV. This tuner is notable for its alignment-free design, single 3.3 V supply voltage, and worldwide multistandard capabilities, making it a versatile component for various TV systems.
Key Specifications
| Symbol | Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| fRF | RF frequency | full range of RF input | 42 | - | 1002 | MHz |
| NFtun | tuner noise figure | 75 Ω impedance source; maximum gain; RF < 870 MHz | - | 3.3 | 3.8 | dB |
| NFtun | tuner noise figure | 75 Ω impedance source; maximum gain; 870 MHz ≤ RF ≤ 1002 MHz | - | 3.9 | 4.5 | dB |
| φjit | phase jitter | integrated from 250 Hz to 4 MHz | - | 0.4 | 0.6 | degree |
| αimage | image rejection | worst case, measured at 4 MHz IF frequency and for image levels above 60 dBμV | - | 65 | - | dB |
| CSO | composite second-order distortion | worst interferer over RF frequency with respect to wanted carrier | -70 | -65 | -65 | dBc |
| CTB | composite triple beat | - | -70 | -65 | -65 | dBc |
| ICP1dB | 1 dB input compression point | at the tuner input and minimum gain | 120 | - | - | dBμV |
Key Features
- Single 3.3 V supply voltage
- Worldwide multistandard terrestrial and cable capabilities
- Alignment free
- RoHS compliant
- I2C-bus interface compatible with 3.3 V microcontrollers
- Fully integrated oscillators
- Fully integrated RF selectivity (no need for RF tracking filters coils)
- 2 programmable General-Purpose Outputs (GPO)
- Dual IF output ports
- Channel bandwidths: 1.7 MHz, 6 MHz, 7 MHz, 8 MHz, and 10 MHz
- LIF channel center frequency output ranging from 0.8 MHz to 7.5 MHz
- Fully integrated IF selectivity; eliminating the need for external SAW filters
- Single-ended RF input, no need for external balun
- Excellent return loss compatible with cable requirements
- Power Level Detector (PLD) embedded
- Integrated gain control
- Self-AGC synchronization mode (VSync) for analog reception
- Very fast tuning time
- Strong immunity to LTE and WLAN interferers
Applications
The TDA18275HN/C1 is designed for use in various TV systems, including terrestrial and cable TV reception. It is suitable for both analog and digital TV broadcasts, making it a versatile component for:
- DTV and DVB-T receivers
- Cable TV set-top boxes
- Hybrid TV systems combining terrestrial and cable reception
- Multi-standard TV tuners requiring global compatibility
Q & A
- What is the TDA18275HN/C1 used for?
The TDA18275HN/C1 is a hybrid silicon tuner used for terrestrial and cable TV reception, supporting both analog and digital TV standards. - What is the supply voltage of the TDA18275HN/C1?
The TDA18275HN/C1 operates on a single 3.3 V supply voltage. - Is the TDA18275HN/C1 RoHS compliant?
Yes, the TDA18275HN/C1 is RoHS compliant. - What are the key features of the TDA18275HN/C1?
Key features include alignment-free design, fully integrated oscillators, dual IF output ports, and strong immunity to LTE and WLAN interferers. - What are the typical noise figures for the TDA18275HN/C1?
The typical noise figures are 3.3 dB for RF < 870 MHz and 3.9 dB for 870 MHz ≤ RF ≤ 1002 MHz. - Does the TDA18275HN/C1 require external SAW filters?
No, the TDA18275HN/C1 has fully integrated IF selectivity, eliminating the need for external SAW filters. - What are the channel bandwidths supported by the TDA18275HN/C1?
The TDA18275HN/C1 supports channel bandwidths of 1.7 MHz, 6 MHz, 7 MHz, 8 MHz, and 10 MHz. - How does the TDA18275HN/C1 handle gain control?
The TDA18275HN/C1 features integrated gain control and a self-AGC synchronization mode (VSync) for analog reception. - Is the TDA18275HN/C1 resistant to interference?
Yes, it has strong immunity to LTE and WLAN interferers. - What is the typical phase jitter of the TDA18275HN/C1?
The typical phase jitter is 0.4 degrees, integrated from 250 Hz to 4 MHz.
