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LMH2832IRHAR bảng dữ liệu(PDF) 1 Page - Texas Instruments

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tên linh kiện LMH2832IRHAR
Giải thích chi tiết về linh kiện  LMH2832 Fully Differential, Dual, 1.1-GHz, Digital Variable-Gain Amplifier
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LMH2832IRHAR bảng dữ liệu(HTML) 1 Page - Texas Instruments

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Frequency (MHz)
0
50 100 150 200 250 300 350 400 450 500 550 600
25
30
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50
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D005
Channel A
Channel B
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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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