Product Details

describe:

The LMH2832 is a high linearity, dual channel, AOD4120 digital variable gain amplifier (DVGA) for high speed signal chains and data acquisition systems. The LMH2832 is optimized to provide high bandwidth, low distortion, and low noise, making the device ideal for use as a dual 14-bit analog-to-digital converter (ADC) driver. The device consists of a fixed gain block and a variable attenuator with a total gain of 30 dB and a maximum attenuation of 39 dB. The gain range is 30 dB to –9 dB with a gain step size of 1 dB and a gain accuracy of ±0.2 dB. The input impedance can be easily matched to a 50-Ω or 75-Ω system 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 Data over Cable Services Interface Specification (DOCSIS) 3 requirements. 0 32 Quadrature Amplitude Modulation (QAM) carriers and DOCSIS 3.1 Wideband Orthogonal Frequency Division Multiplexing (OFDM) system. The LMH2832 has excellent NF (6.5 dB) and linearity, and is designed to meet DOCSIS specifications. The quiescent current of each channel is less than 5 mA in the power-down state, and the typical current consumption during operation is 105 mA per channel.

characteristic:

●Dual channel, independent SPI? Controlled DVGA

●Single 5V power supply

-3-dB bandwidth: 1.1 GHz (maximum gain)

● Flat bandwidth response: 300 MHz

●Inter-channel gain matching: ±0.05 dB

●Phase matching between channels: ±0.1°

●Get:

○30dB to –9dB

○1-dB step ±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 (maximum gain) at 300 MHz, Z IN = 150 Ω

●Adjustable power consumption:

○90 mA to 108 mA per channel

●Power-saving, power-down function:

○ IQ < 4.5 mA per channel

○ Power down pin and SPI programmability

●Input return loss at 300 MHz:

○17dB (RS = 150Ω)

parameter:

Second harmonic (dBc): 82

Third harmonic (dBc): 94

@MHz: 100

Acl, Minimum Spec Gain (V/V): 0.35

Approximate Price (USD): 1 Library | 10.397

Architecture: VGA, Fully Differential ADC Driver

Bandwidth@Acl (MHz): 1100

Gain (Max) (dB): 30

Gain (Min) (dB): -9

Step size (dB): 1

Type: RF VGA

Iq (Typ) (mA) per channel: 105

Number of channels (#): 2

Operating temperature range (°C): -40 to 85

Total supply voltage (max) (+5V=5, +/-5V=10): 5.25

Total supply voltage (Min) (+5V=5, +/-5V=10): 4.75

Vs (min) (V): 4.75

Vs (max) (V): 5.25