LMH2832

AKTIV

Voll differenzieller digitaler Verstärker mit variabler Verstärkung, Dual, 1,1 GHz

Produktdetails

2nd harmonic (dBc) -76 3rd harmonic (dBc) 94 Frequency of harmonic distortion measurement (MHz) 200 Acl, min spec gain (V/V) 0.35 Architecture Fully Differential ADC Driver, VGA BW at Acl (MHz) 1100 Gain (max) (dB) 30 Gain (min) (dB) -9 Step size (dB) 1 Type RF VGA Iq per channel (typ) (mA) 105 Number of channels 2 Rating Catalog Operating temperature range (°C) -40 to 85 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.75 Vs (min) (V) 4.75 Vs (max) (V) 5.25
2nd harmonic (dBc) -76 3rd harmonic (dBc) 94 Frequency of harmonic distortion measurement (MHz) 200 Acl, min spec gain (V/V) 0.35 Architecture Fully Differential ADC Driver, VGA BW at Acl (MHz) 1100 Gain (max) (dB) 30 Gain (min) (dB) -9 Step size (dB) 1 Type RF VGA Iq per channel (typ) (mA) 105 Number of channels 2 Rating Catalog Operating temperature range (°C) -40 to 85 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.75 Vs (min) (V) 4.75 Vs (max) (V) 5.25
VQFN (RHA) 40 36 mm² 6 x 6
  • Dual-Channel, Individual SPI™-Controlled DVGA
  • Single 5-V Supply
  • –3-dB Bandwidth: 1.1 GHz (Max Gain)
  • Flat Bandwidth Response: 300 MHz
  • Channel-to-Channel Gain Matching: ±0.05 dB
  • Channel-to-Channel Phase Matching: ±0.1°
  • Gain:
    • 30 dB to –9 dB
    • 1-dB Steps ±0.2 dB
  • Output Third-Order Intercept Point (OIP3):
    • 43 dBm at 300 MHz
    • 51 dBm at 200 MHz
  • Noise Figure (NF):
    • 6.5 dB (Max Gain) at 300 MHz, ZIN = 150 Ω
  • Adjustable Power Consumption:
    • 90 mA to 108 mA per Channel
  • Power-Saving, Power-Down Feature:
    • IQ < 4.5 mA per Channel
    • Power-Down Pin and SPI Programmability
  • Input Return Loss at 300 MHz:
    • 17 dB (RS = 150 Ω)
  • Dual-Channel, Individual SPI™-Controlled DVGA
  • Single 5-V Supply
  • –3-dB Bandwidth: 1.1 GHz (Max Gain)
  • Flat Bandwidth Response: 300 MHz
  • Channel-to-Channel Gain Matching: ±0.05 dB
  • Channel-to-Channel Phase Matching: ±0.1°
  • Gain:
    • 30 dB to –9 dB
    • 1-dB Steps ±0.2 dB
  • Output Third-Order Intercept Point (OIP3):
    • 43 dBm at 300 MHz
    • 51 dBm at 200 MHz
  • Noise Figure (NF):
    • 6.5 dB (Max Gain) at 300 MHz, ZIN = 150 Ω
  • Adjustable Power Consumption:
    • 90 mA to 108 mA per Channel
  • Power-Saving, Power-Down Feature:
    • IQ < 4.5 mA per Channel
    • Power-Down Pin and SPI Programmability
  • Input Return Loss at 300 MHz:
    • 17 dB (RS = 150 Ω)

The LMH2832 is a high-linearity, dual-channel, digital variable-gain amplifier (DVGA) for high-speed signal chain and data-acquisition systems. The LMH2832 is optimized to provide high bandwidth, low distortion, and low noise, thus making the device ideally suited as a dual, 14-bit, analog-to-digital converter (ADC) driver. The device consists of one fixed-gain block and one variable attenuator consisting of a total gain of 30 dB with a maximum attenuation of 39 dB. The gain range is from 30 dB to –9 dB in 1-dB gain steps with a gain accuracy of ±0.2 dB. The input impedance can be easily matched to 50-Ω or 75-Ω systems using a 1:3-Ω or 1:2-Ω ratio balun, respectively. The LMH2832 is designed to drive general-purpose ADCs and also meets the requirements for both data over cable service interface specification (DOCSIS) 3.0 32 quadrature amplitude modulation (QAM) carriers and DOCSIS 3.1 wideband orthogonal frequency-division multiplexing (OFDM) systems. With excellent NF (6.5 dB) and linearity, the LMH2832 is designed to perform to within DOCSIS specifications. The quiescent current in the power-down state is less than 5 mA per channel with the typical current consumption during operation at 105 mA per channel.

The LMH2832 is a high-linearity, dual-channel, digital variable-gain amplifier (DVGA) for high-speed signal chain and data-acquisition systems. The LMH2832 is optimized to provide high bandwidth, low distortion, and low noise, thus making the device ideally suited as a dual, 14-bit, analog-to-digital converter (ADC) driver. The device consists of one fixed-gain block and one variable attenuator consisting of a total gain of 30 dB with a maximum attenuation of 39 dB. The gain range is from 30 dB to –9 dB in 1-dB gain steps with a gain accuracy of ±0.2 dB. The input impedance can be easily matched to 50-Ω or 75-Ω systems using a 1:3-Ω or 1:2-Ω ratio balun, respectively. The LMH2832 is designed to drive general-purpose ADCs and also meets the requirements for both data over cable service interface specification (DOCSIS) 3.0 32 quadrature amplitude modulation (QAM) carriers and DOCSIS 3.1 wideband orthogonal frequency-division multiplexing (OFDM) systems. With excellent NF (6.5 dB) and linearity, the LMH2832 is designed to perform to within DOCSIS specifications. The quiescent current in the power-down state is less than 5 mA per channel with the typical current consumption during operation at 105 mA per channel.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LMH2832 Fully Differential, Dual, 1.1-GHz, Digital Variable-Gain Amplifier datasheet (Rev. A) PDF | HTML 18 Jul 2016
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mär 2017
EVM User's guide LMH2832EVM-50 Evaluation Module User's Guide 30 Jun 2016
EVM User's guide LMH2832EVM-75 Evaluation Module User's Guide 30 Jun 2016

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LMH2832EVM-50 — LMH2832EVM-50-Evaluierungsmodul

Das LMH2832EVM-50-Evaluierungsmodul (EVM) wird zur Evaluierung des dualen LMH2832 verwendet, eines digital gesteuerten Verstärkers mit variabler Verstärkung (Digitally-Controlled Variable Gain Amplifier, DVGA) in einem 40-Pin-VQFN-Gehäuse. Das EVM wird verwendet, um die Funktionalität und Leistung (...)
Benutzerhandbuch: PDF
GUI für Evaluierungsmodul (EVM)

SLOC338 LMH2832 EVM GUI Setup

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Referenzdesigns

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Dieses Referenzdesign besteht aus einer analogen Frontend-Signalkette (AFE) für Breitband-Empfänger-Anwendungen unter Verwendung des digital gesteuerten Verstärkers mit variablem Verstärkungsfaktor (DVGA) LMH2832 und des Analog-Digital-Wandlers (ADC) ADS54J40. Das Design ist in erster Linie für (...)
Design guide: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
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