NXP Semiconductors TDA8295HN/C1,518

Overview

TDA8295HN/C1,518 from NXP Semiconductors is a digital multistandard low-IF PLL demodulator IC for analog TV and FM radio, supporting M/N, B/G/H, I, D/K, L, and L-accent standards with 12-bit IF ADC (54 MHz), dual 10-bit DACs (CVBS + SSIF/mono audio), and integrated FM radio preprocessing. It operates with 1.2 V and 3.3 V supplies, delivers 62 dB weighted video S/N, and targets PC TV and DVD recorder systems.

For engineers reviewing the TDA8295HN/C1,518 datasheet, TDA8295HN/C1,518 pinout, TDA8295HN/C1,518 application, or TDA8295HN/C1,518 equivalent, key selection factors include its alignment-free digital IF demodulation, 40-pin HVQFN package, I²C-programmable standard selection, gated/peak IF AGC modes, and compatibility with NXP silicon tuners TDA8275A/TDA1827x.

Technical Context

The TDA8295HN/C1,518 implements fully digital IF processing including a second-order robust PLL demodulator with ±830 kHz (extendable to ±1660 kHz) pull-in range, CORDIC-based AM/FM sound demodulation, and Nyquist/video low-pass filtering. Its architecture eliminates external SAW/ceramic filters and supports both crystal oscillator (16 MHz) and external reference clock inputs.

Signal path includes symmetric 12-bit IF ADC sampling at 54 MHz or 27 MHz, DC offset removal, standard-dependent NSC notch filters, group delay equalization (20–40 ns ripple), and video leveling for SCART-compliant CVBS output. FM radio preprocessing uses a sharp 5.5 MHz digital band-pass filter and frequency shifting from 1.25 MHz to enable mono output without external components.

Key Specifications

Pinout & Package

The TDA8295HN/C1,518 is housed in a 40-pin HVQFN (SOT618-1) package with exposed thermal pad, optimized for low-inductance grounding and thermal performance in analog-digital mixed-signal applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog TV and FM radio demodulation applications.

Compared with TDA8290HN/C1,518, the TDA8295HN/C1,518 adds FM radio preprocessing and improves video S/N by 4 dB, while SI2151-A10-GM serves a fundamentally different (digital-only) application space and cannot replace analog demodulation functionality.

Availability

TDA8295HN/C1,518 is available at Aetrix Electronics and suitable for PC TV tuner cards, DVD recorders with analog TV input, and legacy set-top boxes requiring stable component supply and long-term obsolescence management.

Supply support for TDA8295HN/C1,518 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 global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The TDA8295HN/C1,518 belongs to NXP's legacy analog TV demodulator product line, designed specifically for global multistandard broadcast reception in cost-sensitive consumer electronics with minimal external components.

FAQ

What analog TV standards does the TDA8295HN/C1,518 support?

The TDA8295HN/C1,518 supports all major global analog TV standards: M/N, B/G/H, I, D/K, L, and L-accent. It performs digital multistandard demodulation with active carrier regeneration and alignment-free operation. Each standard is handled via I²C-programmable registers, and the IC includes standard-specific video equalization and group delay correction. The TDA8295HN/C1,518 achieves this without external SAW filters or manual alignment, making it suitable for worldwide deployment in a single hardware design.

How does the TDA8295HN/C1,518 handle FM radio signals?

The TDA8295HN/C1,518 integrates dedicated FM radio preprocessing: it shifts incoming 1.25 MHz FM signals to 5.5 MHz and applies a highly selective digital band-pass filter to reject adjacent channels. This eliminates the need for external ceramic filters. The processed signal is then demodulated using a linear CORDIC detector and de-emphasized before output via the mono audio DAC. The TDA8295HN/C1,518 delivers FM mono audio with 54–58 dB weighted S/N and supports automatic/forced mute-enabling compact, low-BOM FM radio functionality.

What is the role of the IF_AGC pin on the TDA8295HN/C1,518?

The IF_AGC pin on the TDA8295HN/C1,518 is a bit-stream DAC output that controls the IF AGC amplifier in compatible NXP silicon tuners (e.g., TDA8275A or TDA1827x). It maintains a constant 3 dB headroom at the TDA8295HN/C1,518's 12-bit IF ADC input by dynamically adjusting the tuner's gain during field periods. The signal is a PWM waveform at 13.5/27/54 MHz, requiring only an external RC low-pass filter. This closed-loop control ensures optimal ADC utilization under varying signal conditions-including channel changes and flutter-without external circuitry.

Can the TDA8295HN/C1,518 be used without an external crystal?

Yes, the TDA8295HN/C1,518 can operate without an external crystal by accepting a 16 MHz clock signal directly on the XIN pin (slave mode), typically sourced from an NXP silicon tuner like the TDA8275A or TDA1827x. Alternatively, a 16 MHz fundamental crystal may be connected between XIN and XOUT for standalone oscillator mode. Both configurations feed the internal PLL synthesizer to generate required clocks for the ADC, DACs, and digital signal processing blocks. The TDA8295HN/C1,518 does not require crystal load capacitors in slave mode, simplifying layout.

What are the power supply requirements for the TDA8295HN/C1,518?

The TDA8295HN/C1,518 requires two independent supply rails: 1.2 V (±10 %) for digital core, PLL, and DAC logic (VDDD1, VDDD2, VDDA(PLL)), and 3.3 V (±10 %) for analog sections including IF ADC, video DAC, and sound DAC (VDDA(ADC), VDDA(DAC1), VDDA(DAC2), VDDDR). Total active power dissipation is typically 324 mW; standby mode draws just 7 mW. Each supply must be locally decoupled with 100 nF ceramic capacitors close to respective VDD/VSS pins, as specified in the layout guidelines of the datasheet.