LMH2832 Series
Fully-Differential, Dual, 1.1 GHz Digital Variable Gain Amplifier
Manufacturer: Texas Instruments
Catalog
Fully-Differential, Dual, 1.1 GHz Digital Variable Gain Amplifier
Key Features
• Dual-Channel, Individual SPI™-Controlled DVGASingle 5-V Supply–3-dB Bandwidth: 1.1 GHz (Max Gain)Flat Bandwidth Response: 300 MHzChannel-to-Channel Gain Matching: ±0.05 dBChannel-to-Channel Phase Matching: ±0.1°Gain:30 dB to –9 dB1-dB Steps ±0.2 dBOutput Third-Order Intercept Point (OIP3):43 dBm at 300 MHz51 dBm at 200 MHzNoise Figure (NF):6.5 dB (Max Gain) at 300 MHz, ZIN= 150 ΩAdjustable Power Consumption:90 mA to 108 mA per ChannelPower-Saving, Power-Down Feature:IQ< 4.5 mA per ChannelPower-Down Pin and SPI ProgrammabilityInput Return Loss at 300 MHz:17 dB (RS= 150 Ω)Dual-Channel, Individual SPI™-Controlled DVGASingle 5-V Supply–3-dB Bandwidth: 1.1 GHz (Max Gain)Flat Bandwidth Response: 300 MHzChannel-to-Channel Gain Matching: ±0.05 dBChannel-to-Channel Phase Matching: ±0.1°Gain:30 dB to –9 dB1-dB Steps ±0.2 dBOutput Third-Order Intercept Point (OIP3):43 dBm at 300 MHz51 dBm at 200 MHzNoise Figure (NF):6.5 dB (Max Gain) at 300 MHz, ZIN= 150 ΩAdjustable Power Consumption:90 mA to 108 mA per ChannelPower-Saving, Power-Down Feature:IQ< 4.5 mA per ChannelPower-Down Pin and SPI ProgrammabilityInput Return Loss at 300 MHz:17 dB (RS= 150 Ω)
Description
AI
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.
