SKY66315-11 - 4.4-5GHz 5V RF Power Amp | Skyworks
MPN: SKY66315-11 ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SKY66315-11 Overview
An RF power amplifier is a power management stage in the radio-frequency transmit chain that boosts a modulated carrier to the drive level required by the antenna or final-stage PA. Within the signal-chain hierarchy, the power amplifier sits after the upconverter/transceiver and before the front-end module, making its gain, linearity, and efficiency decisive for overall radio range and spectral compliance.
Key features include full input/output matching (no external matching networks required in typical designs), integrated active biasing circuitry that compensates performance over temperature, supply voltage, and process variation, and high gain with good linearity for wide-bandwidth OFDM waveforms. The device operates from a supply voltage between 4 V and 5.25 V with typical current consumption of approximately 115 mA, supporting standard 5 V RF system rails.
Architecturally, the SKY66315-11 is a fully matched multi-chip module (MCM) amplifier; the 5 x 5 mm footprint and internal impedance matching reduce board area and simplify design-in for n79-band and related 5 GHz sub-6 GHz radios. The active bias scheme keeps quiescent current stable across the -40 C to +85 C (per datasheet) range, improving gain flatness over conditions compared with fixed-bias solutions.
Typical applications include 5G NR sub-6 GHz small-cell and macro-cell driver stages, 4G LTE TDD/FDD transmit chains, customer-premises equipment (CPE) and fixed wireless access radios, and test/measurement signal sources in the 4.4-5 GHz band.
For design-in, verify supply decoupling with low-ESR ceramics close to the supply pins and provide an adequate ground via array under the package thermal path to manage power dissipation; also confirm ACPR/linearity under the specific waveform and back-off of the target standard.
This page synthesizes distributor availability, cross-family alternatives, design guidance, and application context not found in a single manufacturer datasheet.
Drop-in alternatives for SKY66315-11 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SKY66315-11A
✅ Drop-In📋 Reference alternative (not in catalog)
SKY66312-11
✅ Drop-In📋 Reference alternative (not in catalog)
SKY66313-11
✅ Drop-In📋 Reference alternative (not in catalog)
SKY66318-11
✅ Drop-In📋 Reference alternative (not in catalog)
SKY65933-11
✅ Drop-In📋 Reference alternative (not in catalog)
SKY66315-11 Maximum Ratings & Electrical Characteristics
| Product Type | RF Power Amplifier (Driver Amp) |
| Frequency Range | 4.4 GHz to 5 GHz |
| Gain | 35 dB |
| Supply Voltage | 4 V to 5.25 V (typ 5 V) |
| Supply Current (typical) | 115 mA |
| Standard | 4G LTE / 5G NR, FDD and TDD |
| Matching | Fully input/output matched, 50 ohm |
| Biasing | Integrated active bias (temperature/voltage compensated) |
| Package | 16-MCM, 5 x 5 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Instantaneous Bandwidth | Wide instantaneous bandwidth (see datasheet) |
SKY66315-11 16-mcm, 5 x 5 mm Pin Configuration Guide
Pin configuration for SKY66315-11 (16-mcm, 5 x 5 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for SKY66315-11.
Refer to the datasheet for full pin configuration.
Typical Applications
SKY66315-11 is suitable for 6 applications: 5G NR Sub-6 GHz Small-Cell Radio, Fixed Wireless Access (FWA) CPE Transmit Chain, 4G LTE TDD/FDD Infrastructure Driver, 5G Test and Measurement Signal Sources, Private 5G and CBRS Enterprise Networks, Satellite and Non-Terrestrial Network Uplink Prototyping.
5G NR Sub-6 GHz Small-Cell Radio
The SKY66315-11 is purpose-built as a driver amplifier for 5G NR sub-6 GHz small-cell transmitters operating at 4.4 GHz to 5 GHz, matching the n79 band plan. Its approximately 35 dB gain allows a transceiver output of around 0 dBm to be raised to the drive level of a final-stage PA, while the fully matched 50 ohm input/output removes the need for external matching networks and shrinks the RF section of the board. Integrated active biasing holds gain and linearity steady across temperature and supply variation - critical for maintaining ACPR compliance under high peak-to-average OFDM waveforms. Placed on a low-loss RF laminate with a solid ground via array beneath the 5 x 5 mm MCM, it adds minimal switching or bias noise compared with discrete biasing solutions, though dissipation under TDD duty cycling should be verified thermally.
Recommended
Fixed Wireless Access (FWA) CPE Transmit Chain
Fixed wireless access customer-premises equipment in the 4.4-5 GHz range benefits directly from the SKY66315-11's combination of high efficiency, wide instantaneous bandwidth, and 35 dB gain. In a typical CPE transmit chain, the transceiver's differential RF output feeds the amplifier input through a balun; the fully matched output then drives a front-end module or final PA toward the antenna. The 4 V to 5.25 V supply range tolerates CPE power-rail variation, and the 115 mA typical current keeps the DC budget modest for outdoor subscriber units powered over PoE. Active biasing compensates the wide outdoor temperature swings the unit experiences, holding EVM within mask limits. Because the part is RoHS compliant and surface mount, it integrates directly into standard CPE SMT assembly without special processing.
Recommended
4G LTE TDD/FDD Infrastructure Driver
Although optimized for 5G, the SKY66315-11 also serves 4G LTE FDD and TDD driver stages in the 4.4-5 GHz allocation, as classified by DigiKey under '4G/5G, FDD, LTE, TDD'. In LTE remote radio units, the driver amplifier must preserve linearity ahead of the Doherty or balanced final stage; the SKY66315-11's wide instantaneous bandwidth supports carrier-aggregated LTE signals without retuning. Its integrated active bias circuitry compensates gain drift over the -40 C to +85 C outdoor enclosure environment (per datasheet range), which reduces AGC loop burden in the radio. Designers should budget crest-factor reduction or back-off (typically 6-8 dB for LTE) and confirm ACPR in the system-level simulation before committing the PCB, since driver linearity directly sets final-stage ACLR margin.
Recommended
5G Test and Measurement Signal Sources
Bench and production test equipment for 5 GHz-band radios uses broadband driver amplifiers to raise vector signal generator output to the levels required for receiver blocking and intermodulation tests. The SKY66315-11 fits this role: 35 dB of gain across 4.4-5 GHz lets a +0 dBm generator output produce a strong stimulus, and the wide instantaneous bandwidth passes wideband 5G NR test models without gain ripple. The fully matched ports connect directly to 50 ohm coaxial test plumbing with no tuning. The 5 V supply and 115 mA typical draw allow compact USB-powered test fixtures. Active biasing keeps output level stable over warm-up, improving measurement repeatability - an advantage over fixed-bias discrete PAs that require calibration across temperature in production fixtures.
Recommended
Private 5G and CBRS Enterprise Networks
Private 5G networks and CBRS-adjacent enterprise radios deploying in upper sub-6 GHz spectrum use compact picocell hardware where board area and thermal budget are constrained. The SKY66315-11's 5 x 5 mm 16-MCM footprint and integrated matching reduce the RF front-end area compared with discrete matched PA solutions, and the active biasing removes the need for external bias-control circuitry and its calibration effort. The wide 4.4-5 GHz coverage lets one board design serve multiple regional band plans, reducing SKU proliferation for enterprise radio vendors. With 50 ohm matched ports, the amplifier connects to coupled-line directional couplers for power control loops with straightforward layout. Supply decoupling with low-ESR ceramics at the 5 V pin and a dense ground via field under the package complete a robust design-in.
Recommended
Satellite and Non-Terrestrial Network Uplink Prototyping
Emerging non-terrestrial network (NTN) and small-satellite uplink prototypes operating in upper S/C-adjacent allocations near 5 GHz use the SKY66315-11 in evaluation-stage transmit chains. Its 35 dB gain and fully matched interface allow rapid breadboarding with standard coaxial interconnects, and the 4-5.25 V supply range accommodates spacecraft power bus regulators. The wide instantaneous bandwidth supports spread-spectrum and OFDM waveforms under evaluation for direct-to-cell and IoT NTN links. During prototyping, the active biasing simplifies gain staging across the thermal-vacuum test range by keeping quiescent operating point stable, reducing calibration passes. For flight builds, designers must confirm radiation and qualification requirements separately, as this part is characterized for terrestrial infrastructure rather than space environments per available data.
Recommended
Recommended Products Summary
Engineering reference data for SKY66315-11 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SKY66315-11A | SKY66312-11 | SKY66313-11 | SKY66318-11 |
|---|---|---|---|---|---|
| Package | 16-MCM (5x5 mm) | 16-MCM (5x5 mm) - same | 16-MCM (5x5 mm) - same | 16-MCM (5x5 mm) - same | 16-MCM (5x5 mm) - same |
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Frequency Range | 4.4 GHz to 5 GHz | 4.4 GHz to 5 GHz | 2.3 GHz to 2.4 GHz | 3.4 GHz to 3.6 GHz | 3.3 GHz to 3.6 GHz |
| Target Standard | 4G/5G FDD, LTE, TDD | 4G/5G FDD, LTE, TDD | 4G/5G, LTE | 4G/5G FDD/TDD | 5G wideband infrastructure |
| Active Bias Compensation | Yes (integrated) | Yes (integrated) | Yes (family architecture) | Yes (per Skyworks product page) | Yes (family architecture) |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Upper 5 GHz band coverage for 5G n79 (vs SKY66313-11)
- Wide 4.4-5 GHz coverage vs narrow band variants (vs SKY66318-11)
- Honest trade-off: not a second source for lower bands (vs SKY66312-11)
Design Notes
Mount the SKY66315-11 on a continuous ground plane with a dense via array directly under the 16-MCM package to provide both RF grounding and the primary thermal path. Skyworks MCM power amplifiers rely on the PCB ground for heat removal - estimate thermal rise using DC power minus RF output power (at 5 V and 115 mA quiescent, DC input is about 0.58 W before drive). Use 50 ohm controlled-impedance microstrip/stripline at the RF ports and keep the input-to-output path clean to avoid feedback and instability at 5 GHz.
Decouple the 4-5.25 V supply pin with low-ESR ceramic capacitors (typically 100 pF, 1000 pF, and 10 uF in parallel) placed within a few millimeters of the supply pin. The supply network must present low impedance at the envelope-modulation frequencies of the 5G waveform (up to 100 MHz channel bandwidth), or bias ripple will degrade EVM and ACPR. Route the supply as a dedicated plane or wide trace, and keep supply inductance low to prevent voltage droop during peak-envelope events.
Do not interchange band variants: the SKY66312-11 (2.3-2.4 GHz), SKY66313-11 (3.4-3.6 GHz), and SKY66318-11 (3.3-3.6 GHz) share the same 5 x 5 mm package family but are not frequency-compatible with the 4.4-5 GHz SKY66315-11 - a BOM error here will pass DC checks yet fail RF tests. Also verify the exact '-11' suffix and revision when sourcing; the 'A' suffix (SKY66315-11A) denotes a revised variant, so confirm the datasheet revision applies to your qualification before substituting in production.
Compliance Information
RoHS compliance per JLCPCB part listing (C2887667) for SKY66315-11. REACH and halogen-free status should be confirmed via the official Skyworks material declaration sheet.
