STMicroelectronics STW82100BTR

Overview

STW82100BTR from STMicroelectronics is an RF down converter with an embedded integer-N synthesizer designed for cellular infrastructure receivers, IF sampling receiver architectures, digital PA linearization loops, and other wireless communication systems. The device integrates a passive mixer, IF amplifier, RF balun, dual differential VCOs, integer-N PLL synthesizer, dual digital control interface, and DAC outputs for external PIN diode attenuator control.

For engineers reviewing the STW82100BTR datasheet, STW82100BTR pinout, STW82100BTR application, or STW82100BTR equivalent, this RF IC is most relevant for 1620 MHz to 2400 MHz down-conversion designs requiring 8 dB conversion gain, 10.5 dB noise figure, +25.5 dBm IIP3, 70 MHz to 400 MHz IF amplifier coverage, SPI or I²C programming, and 44-lead exposed-pad VFQFPN assembly.

Technical Context

STW82100BTR combines a high-linearity passive mixer and integrated RF balun to support direct 50 Ω single-ended RF input matching over the 1620 MHz to 2400 MHz RF range. The IF output stage is intended to drive 200 Ω impedance filters across a 70 MHz to 400 MHz IF amplifier range, giving cellular infrastructure receivers a compact RF-to-IF signal-chain device with 8 dB conversion gain and 77 dBc 2FRF-2FLO spurious rejection.

The synthesizer section uses dual differential integrated VCOs with automatic center-frequency calibration, covering LOA from 1650 MHz to 1950 MHz and LOB from 2050 MHz to 2370 MHz. The embedded integer-N PLL includes a 16/17 or 19/20 dual-modulus prescaler, 10-bit programmable reference divider, adjustable charge-pump current, digital lock detector, and 150 µs fast lock time, with control through SPI or fast-mode I²C using programmable address pins.

Key Specifications

Pinout & Package

STW82100BTR is supplied in a 44-lead exposed-pad VFQFPN package measuring 7 mm × 7 mm × 1.0 mm. The exposed-pad QFN format supports compact RF placement, low-inductance grounding, controlled RF return paths, and efficient board-level thermal transfer, which are important for integrating the RF input, IF outputs, PLL loop filter, VCO control, serial bus, and multiple supply domains in cellular infrastructure RF boards.

Key Features

• Integrated RF down converter with passive mixer, IF amplifier, RF balun, integer-N synthesizer, and dual VCOs.
• 1620 MHz to 2400 MHz RF input range for high-band cellular infrastructure and wireless receiver applications.
• 8 dB conversion gain, 10.5 dB noise figure, and +25.5 dBm IIP3 for high-linearity RF-to-IF conversion.
• 70 MHz to 400 MHz IF amplifier frequency range suitable for IF sampling receiver architectures.
• Dual integrated VCO ranges with automatic center-frequency calibration and 150 µs synthesizer lock time.
• SPI and fast-mode I²C programming interface plus integrated dual-current DAC for external PIN diode attenuator control.

Applications

Equivalent & Alternatives

When evaluating STW82100BTR equivalent devices, engineers should compare RF input frequency range, LO/VCO coverage, conversion gain, noise figure, IIP3, IF amplifier frequency range, synthesizer interface, DAC attenuator-drive requirement, VFQFPN-44 footprint, and tape-and-reel production format.

Compared with STW82101BTR, STW82100BTR is optimized for higher-band RF down conversion from 1620 MHz to 2400 MHz while retaining the integrated RF balun, IF amplifier, synthesizer, and digital-control structure of the STW8210xB family. STW82100BTR vs STW82102BTR or STW82103BTR selection depends mainly on RF band coverage, LO planning, IF frequency target, spur rejection needs, and production packaging requirements.

Quality

STW82100BTR should be sourced as original STMicroelectronics components through traceable and controlled supply channels. Quality verification procedures may include VFQFPN-44 package inspection, top-mark validation, reel and label verification, solderability testing, RF input continuity review, IF output function verification, SPI / I²C programming checks, PLL lock-detect testing, conversion-gain screening, and incoming inspection according to RF infrastructure equipment production requirements.

Availability

STW82100BTR is available at Aetrix Electronics and suitable for cellular infrastructure receivers, IF sampling receiver platforms, digital PA linearization loops, and wireless RF down-conversion modules requiring stable component supply and repeatable production support.

Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and long-term availability support for OEM manufacturers, RF module builders, base-station equipment developers, wireless communication system designers, and electronics production programs.

For production deployment, confirming the VFQFPN-44 package, 1620 MHz to 2400 MHz RF range, IF frequency plan, SPI or I²C control mode, analog and digital supply rails, reel packaging, environmental specifications, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

STMicroelectronics supplies RF, mixed-signal, power, embedded, and discrete semiconductor products for wireless infrastructure, industrial, automotive, consumer, and communication systems. STW82100BTR belongs to the STW8210xB RF down-converter family, which combines frequency synthesis, VCO generation, RF mixing, IF amplification, and digital configurability for compact high-performance RF signal-chain designs.

FAQ

What is STW82100BTR used for?

STW82100BTR is used for RF down-conversion in cellular infrastructure equipment, IF sampling receivers, digital PA linearization loops, and wireless communication systems. It translates RF signals from the 1620 MHz to 2400 MHz range into a 70 MHz to 400 MHz IF range using an integrated mixer, IF amplifier, and synthesizer.

What RF and IF ranges does STW82100BTR support?

STW82100BTR supports an RF input range from 1620 MHz to 2400 MHz and a wide IF amplifier range from 70 MHz to 400 MHz. The integrated VCO ranges are LOA from 1650 MHz to 1950 MHz and LOB from 2050 MHz to 2370 MHz, allowing the device to cover the STW82100B high-band frequency plan.

Does STW82100BTR include an RF synthesizer?

Yes. STW82100BTR includes an embedded integer-N synthesizer with dual integrated VCOs, automatic center-frequency calibration, programmable prescaler, 10-bit reference divider, adjustable charge-pump current, digital lock detector, and 150 µs fast lock time. This integration reduces the need for a separate external PLL and VCO block in many RF boards.

Which digital interfaces are available on STW82100BTR?

STW82100BTR supports both SPI and fast-mode I²C bus control. The I²C address uses three programmable address pins in the 1101A2A1A0 format, while the SPI interface uses data, clock, and load control pins for register programming.

What package is used by STW82100BTR?

STW82100BTR uses a 44-lead exposed-pad VFQFPN package measuring 7 mm × 7 mm × 1.0 mm. The exposed pad provides the RF ground and thermal path, while the 44-lead layout separates RF input, IF output, PLL, VCO, DAC, digital bus, and supply-domain connections.

What are common STW82100BTR equivalent options?

Common comparison options include STW82100B for the same circuit function in tray packaging, STW82101BTR for 695 MHz to 960 MHz RF coverage, STW82102BTR for 1425 MHz to 1910 MHz coverage, and STW82103BTR for 2300 MHz to 2700 MHz coverage. Selection depends on RF band plan, LO range, IF target, package format, and production packaging.