MMH3111NT1 - 250-4000 MHz, 12 dB, 22.5 dBm GaAs HFET GPA | NXP
부품 번호: MMH3111NT1 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.35 | $335.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.6 | $2,600.00 |
MMH3111NT1 개요
A general-purpose amplifier (GPA) is a wideband RF gain stage built to deliver predictable small-signal gain and IP responsivity over multiple octaves without requiring external tuning. Within the RF front-end hierarchy, a GPA sits between low-noise amplifiers (LNAs) and power amplifiers (PAs); LNAs prioritize minimum noise figure, GPAs balance noise, linearity and gain, and PAs maximize output power. The MMH3111NT1 belongs to NXP's HFET family of GaAs pHEMT-style devices, fabricated on a heterojunction process that delivers high electron mobility, low noise figure, and high linearity relative to silicon bipolar alternatives at similar frequencies.
Key features of the MMH3111NT1 include broadband operation from 250 MHz to 4000 MHz, 12 dB typical gain, a P1dB/Psat around 22.5 dBm, internal 50-ohm prematching at the input and output, and a low-profile SOT-89 plastic package with a grounded tab for thermal dissipation. The device operates from a single positive supply and is biased for Class A linear operation. Its broadband prematched architecture simplifies board layout and reduces BOM count in cellular, PCS, ISM and WLL applications.
Typical applications include driver stages for cellular/PCS base-station transmitters, ISM-band amplifiers at 900 MHz, 2.4 GHz and 3.5 GHz, broadband instrumentation, and general-purpose gain blocks in WLL and fixed-wireless designs. Designers value this part for its combination of internal prematching, which eliminates external LC networks, and its linear Class A operation across multiple octaves.
When designing with this part, evaluate the thermal path through the SOT-89 tab to the PCB ground plane and ensure adequate copper area to keep junction temperature within the rated operating range. Use a well-decoupled Vdd bias network with chip and electrolytic capacitors to prevent low-frequency oscillation.
This page consolidates distributor pricing, verified drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet, helping engineers shorten selection time.
드롭인 대체품: MMH3111NT1 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MMH3111NT1 (동일 폼 팩터 및 풋프린트) — 차이점: Frequency Range, Operating Class, Package, Part Description, Supply Voltage.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MMH3111NT1G
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MMG3007NT1
✅ 드롭인✓ 재고 있음
$1.55 / 개
데이터시트 보기 →MMH3111NT1 최대 정격 & 전기적 특성
| Manufacturer | NXP Semiconductors (formerly Freescale Semiconductor) |
| Part Description | General Purpose Amplifier (GPA) |
| Process Technology | GaAs Heterostructure FET (HFET) |
| Frequency Range | 250 MHz to 4000 MHz |
| Typical Small-Signal Gain | 12 dB |
| Saturated Output Power (Psat) | 22.5 dBm |
| Operating Class | Class A, small-signal, high linearity |
| Input / Output Matching | Internally prematched |
| 패키지 | SOT-89-4 (3 leads + tab) |
| 실장 유형 | Surface Mount |
| 공급 전압 | 6 V nominal (per distributor listing) |
| Application Categories | Cellular, PCS, ISM, WLL |
MMH3111NT1 핀 구성
| 핀 1 | RF IN — RF input (internally prematched, DC blocked) |
| 핀 2 | GND — Ground |
| 핀 3 | RF OUT / Vdd — RF output combined with DC supply feed |
| 핀 4 | TAB (GND) — Exposed tab - main ground and thermal path |
일반적인 애플리케이션
MMH3111NT1 적합 용도: 6 애플리케이션s: Cellular / PCS Base-Station Driver, ISM-Band Amplifier (900 MHz / 2.4 GHz / 3.5 GHz), WLL and Fixed-Wireless Gain Block, Broadband Test and Measurement, General-Purpose RF Gain Stage, Receiver Front-End Pre-Driver.
Cellular / PCS Base-Station Driver
The MMH3111NT1's 12 dB typical gain and 22.5 dBm Psat make it well suited as a driver or pre-driver stage in cellular and PCS base-station transmit chains. With internal input and output prematching across 250 MHz to 4 GHz, it drops into 50-ohm paths covering the 900 MHz, 1800 MHz, 1900 MHz and 2100 MHz bands without external matching components, simplifying PCB layout and reducing BOM count. Class A operation preserves linearity for non-constant-envelope modulation.
추천
ISM-Band Amplifier (900 MHz / 2.4 GHz / 3.5 GHz)
Industrial-Scientific-Medical (ISM) applications at 900 MHz, 2.4 GHz, and 3.5 GHz sit comfortably inside the MMH3111NT1's 250 MHz to 4 GHz operating range. The 12 dB gain provides useful boost for short-range radios, while the 22.5 dBm saturated output power supports moderate-range links. Internal prematching lets designers prototype Wi-Fi, Bluetooth, ZigBee and proprietary ISM radios without tuning external LC networks, accelerating time-to-market.
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WLL and Fixed-Wireless Gain Block
Wireless Local Loop (WLL) and fixed-wireless access systems require broadband, linear gain stages that operate reliably across multiple service bands. The MMH3111NT1's 250 MHz to 4 GHz coverage, internal prematching, and Class A bias deliver predictable gain for outdoor subscriber and base-station units. The SOT-89-4 package's grounded tab provides sufficient thermal dissipation for continuous-duty WLL operation.
추천
Broadband Test and Measurement
Laboratory instruments - signal generators, spectrum analyzers, and broadband amplifiers - need gain stages that work over multi-decade bandwidths without retuning. The MMH3111NT1's 250 MHz to 4 GHz response and 12 dB gain make it a useful building block for wideband lab amplifiers. Its internal prematching keeps input return loss acceptable in 50-ohm test setups, while its modest 22.5 dBm Psat prevents excessive signal levels in measurement paths.
추천
General-Purpose RF Gain Stage
When a designer needs a quick, predictable RF gain block that works across cellular, ISM, and instrumentation frequencies, the MMH3111NT1 offers the simplest path. With 12 dB typical gain, internal prematching, and Class A operation, it can be inserted between a mixer/IF stage and a downstream filter or ADC without any external matching components. The SOT-89-4 surface-mount package fits standard 50-ohm microstrip layouts.
추천
Receiver Front-End Pre-Driver
While the MMH3111NT1 is optimized as a general-purpose amplifier, its 12 dB gain and 250 MHz to 4 GHz coverage allow it to act as a pre-driver in receiver paths feeding mixers or ADCs. Its broadband prematching simplifies interface to 50-ohm IF filters, and its linearity preserves signal integrity for demodulation of digital modulation schemes. Designers should evaluate noise figure per application against LNA-only alternatives.
추천
추천 제품 요약
엔지니어링 참조 데이터: MMH3111NT1 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MMH3111NT1G | MMG3007NT1 |
|---|---|---|---|
| Package | SOT-89-4 | SOT-89-4 - same | SOT-89-4 - same |
| Brand | NXP Semiconductors | onsemi | NXP Semiconductors |
| Frequency Range | 250 MHz - 4 GHz | 250 MHz - 4 GHz | DC - 3 GHz (typ) |
| Typical Gain | 12 dB | 12 dB | 16 dB (typ) |
| Process Technology | GaAs HFET | GaAs HFET | GaAs pHEMT MMIC |
| Operating Class | Class A | Class A | Class A / AB |
| Input/Output Matching | Internal prematch (50 ohm) | Internal prematch (50 ohm) | Internal prematch |
| Pin Count | 3 + tab | 3 + tab | 3 + tab |
주요 차별점
- Internally prematched input and output (vs Discrete GaAs FET designs requiring external LC matching)
- Broadband 250 MHz to 4 GHz coverage (vs Narrow-band amplifiers covering only one sub-band)
- GaAs HFET process for high linearity (vs Silicon bipolar gain blocks at similar frequencies)
설계 노트
The SOT-89-4 package dissipates heat primarily through the exposed tab. At Psat (22.5 dBm, ~178 mW) plus quiescent dissipation, total power can reach 0.6 W. Solder the tab to a copper pour of at least 1 square inch on the PCB and use multiple thermal vias under the tab to keep junction temperature within the rated operating range. Estimated: with theta_JA around 80 C/W on a JEDEC test board, 0.6 W dissipation gives roughly 48 C rise above ambient - adequate margin in commercial environments but tighter in sealed enclosures.
Follow the NXP evaluation board layout for MMH3111NT1 to preserve the internal prematching characteristics. Place input/output 50-ohm transmission lines as short as possible, keep the tab ground pour continuous under the device, and isolate the bias network with chip capacitors (typically 100 pF and 10 nF in parallel) plus an electrolytic bulk cap at the supply pin. Avoid ground plane splits under the RF traces.
Do not assume all SOT-89 GPAs share the same pinout - pin 1 location varies between manufacturers. Verify against the MMH3111NT1 datasheet before PCB assembly. Also, beware of low-frequency oscillation: if the bias network lacks sufficient decoupling at VHF/UHF bands, the device can self-oscillate. Add a small series resistor (5-10 ohm) in the Vdd line if oscillation is observed.
규정 준수 정보
RoHS/lead-free status not stated in the verified web snippets; confirm with NXP's latest material declaration. AEC-Q100 is not applicable to this RF amplifier.
