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LMH2832IRHAR bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LMH2832IRHAR bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 46 page Frequency (MHz) 0 50 100 150 200 250 300 350 400 450 500 550 600 25 30 35 40 45 50 55 60 D005 Channel A Channel B Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LMH2832 SBOS709A – JULY 2016 – REVISED JULY 2016 LMH2832 Fully Differential, Dual, 1.1-GHz, Digital Variable-Gain Amplifier 1 1 Features 1 • 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) 2 Applications • DOCSIS 3.1 CMTS Upstream Direct Sampling Receivers • CATV Modem Signal Scaling • Programmable Gain IF Amplifiers • Generic RF, IF Gain Stages • ADC Drivers 3 Description 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. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LMH2832 VQFN (40) 6.00 mm × 6.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Output Third-Order Intercept Point (OIP3) Performance |
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