NXP Semiconductors TFF11092HN/N1

Overview

TFF11092HN from NXP Semiconductors is a Ku-band frequency generator IC designed as a low-phase-noise local oscillator (LO) for VSAT upconverters and transceivers. It delivers RF output from 9.03 GHz to 9.22 GHz, achieves −97 dBc/Hz synthesizer phase noise at 100 kHz offset (with 64× division), and operates with 3.3 V supply and 100–130 mA current draw.

For engineers reviewing the TFF11092HN datasheet, TFF11092HN pinout, TFF11092HN application, or TFF11092HN equivalent, key selection criteria include IESS-308 compliance, differential reference input support (35–576 MHz), programmable divider settings (16/32/64/128/256), integrated VCO regulation (VREGVCO), and lock-detect output (LCKDET) with CMOS-compatible voltage levels.

Technical Context

The TFF11092HN implements a third- or fourth-order PLL architecture with a voltage-controlled oscillator (VCO) core, phase-frequency detector (PFD), and charge pump (CP). Its loop filter interface supports type-2 or type-3 configurations via CPOUT and VTUNE pins, with internal 10 pF and 30 pF capacitors referenced to VREGVCO.

It features dual differential RF outputs (BUF1_P/N, BUF2_P/N), internally stabilized voltage references for REF and DIV blocks, and a window-based lock detector comparing VTUNE against 7% and 93% of VREGVCO (2.7 V nominal), delivering 2.5 V CMOS logic on LCKDET.

Key Specifications

Pinout & Package

Package: HVQFN24 (SOT616-1), 4 mm × 4 mm × 0.85 mm, thermally enhanced, leadless, 24-terminal plastic package with exposed diepad for thermal and ground integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LO generator applications.

Compared with HMC738LP4E and ADF4371, the TFF11092HN offers plug-and-play IESS-308 compliance with integrated VCO regulation and dual buffered outputs-reducing design cycle time and component count for fixed-frequency Ku-band upconverters.

Availability

TFF11092HN is available at Aetrix Electronics and suitable for Ku-band VSAT upconverters, satellite transceivers, and Intelsat-compliant modem designs requiring stable component supply, consistent phase noise performance, and long-term obsolescence management.

Supply support for TFF11092HN 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 communication infrastructure markets.

The TFF11092HN belongs to NXP's high-frequency RF synthesizer product line, engineered specifically for satellite communications equipment requiring ultra-low phase noise, Ku-band integration, and regulatory compliance in compact form factors.

FAQ

What is the guaranteed RF output frequency range for the TFF11092HN?

The TFF11092HN guarantees an RF output frequency range of 9.03 GHz to 9.22 GHz under specified operating conditions (VCC = 3.0–3.6 V, Tamb = −40 to +85 °C). This range is achieved using its internal VCO and integer-N divider with reference inputs from 35 MHz to 576 MHz. The device is characterized and validated for Ku-band VSAT upconverter applications within this band.

Does the TFF11092HN support differential or single-ended reference inputs?

The TFF11092HN supports both differential and single-ended reference inputs via IN(REF)_P and IN(REF)_N pins. The inputs are high-impedance, internally biased differential pairs requiring AC coupling. For single-ended use, the unused input must be terminated with the same impedance as the source, as shown in Figure 8 of the datasheet. No external biasing is required.

How is lock detection implemented on the TFF11092HN?

The TFF11092HN implements lock detection using a window comparator that monitors VTUNE voltage relative to VREGVCO. The lower threshold is 7% and upper threshold is 93% of VREGVCO (≈2.7 V), with 0.1 V hysteresis. LCKDET outputs 2.5 V CMOS HIGH when locked and 0 V when out of lock, with typical 10 µs attack/decay time. A 100 kΩ pull-down resistor is integrated to GND1(REF).

Can the TFF11092HN be used with a type-3 loop filter?

Yes, the TFF11092HN supports both type-2 and type-3 loop filters. For type-3, external components R2 and C3 are added between CPOUT and VTUNE (see Figure 5). Table 5 provides recommended values for C1, C2, C3, R1, and R2 based on reference frequency and divider setting. Type-3 improves transient response and reduces reference spurs compared to type-2.

What is the purpose of the VREGVCO pin on the TFF11092HN?

VREGVCO (Pin 1) provides a regulated 2.7 V output used as the reference voltage for the VCO tuning circuit and loop filter. It supplies the bias for internal VCO regulation and serves as the reference for the lock detector's window thresholds. External loop filter components must be connected directly to VREGVCO, not to VCC, to ensure stable VCO control and accurate lock detection.