參數資料
| 型號： | ADA4320-1ACPZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/16頁 |
| 文件大小： | 0K |
| 描述： | IC LINE DVR CATV 5V 24LFCSP |
| 標準包裝： | 5,000 |
| 應用： | CATV |
| 輸出類型： | 差分 |
| 電路數： | 1 |
| 電流 - 電源： | 260mA |
| 電壓 - 電源，單路/雙路(±)： | 4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，CSP |
| 供應商設備封裝： | 24-LFCSP-VQ EP（4x5） |
| 包裝： | 帶卷 (TR) |
Low Distortion, DOCSIS 3.0, Upstream CATV
Line Driver
ADA4320-1
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2010 Analog Devices, Inc. All rights reserved.
FEATURES
Supports CableLabs DOCSIS 3.0/2.0 and EuroDOCSIS
3.0/2.0 specifications for customer premises equipment
(CPE) upstream transmission
5 V single-supply operation
Excellent adjacent channel rejection performance
66 dBc ACPR for a single QPSK channel
63 dBc ACPR for 4× QAM64 channels
Gain programmable in 1 dB steps over a 59 dB range
Gain range: 27 dB to +32 dB
Current-scaled output stage
Low between-burst output noise level
70 dB mV in 160 kHz bandwidth
Maintains constant output impedance in enable, disable,
and sleep conditions
Selectable low power modes
12 mA in Tx disable
12 μA in sleep mode (full power-down)
3-wire, SPI-compatible interface
4 mm × 5 mm 24-lead LFCSP, RoHS compliant
APPLICATIONS
DOCSIS 3.0 and EuroDOCSIS cable modems/E-MTAs
DOCSIS 3.0 set-top boxes
CATV telephony modems
Coaxial or twisted pair line drivers
FUNCTIONAL BLOCK DIAGRAM
POWER
AMP
DIFF OR
SINGLE
INPUT
AMP
VERNIER
VIN–
CLK
SDATA
GND
VIN+
VOUT+
VOUT–
RAMP
ATTENUATION
CORE
DECODE
DATA LATCH
SHIFT
REGISTER
8
ADA4320-1
ZOUT DIFF =
300
ZIN (SINGLE) = 320
ZIN (DIFF) = 640
POWER-DOWN
LOGIC
DATEN
TXEN
SLEEP
08707-
001
Figure 1.
GENERAL DESCRIPTION
The ADA4320-1 is a high power, ultralow distortion amplifier
designed for CATV reverse channel line driving. Its features and
specifications make the ADA4320-1 ideally suited for DOCSIS 3.0-
and EuroDOCSIS 3.0-based applications. Both gain and output
stage current are controlled via a 3-wire (SPI-compatible) interface.
A single 8-bit serial word selects one of four available supply
current presets and one of sixty gain codes.
The ADA4320-1 has been tailored to address both the high output
drive and stringent fidelity requirements of DOCSIS 3.0. The
part is able to maintain excellent adjacent channel rejection
performance over the full 5 MHz to 85 MHz range, even with
multiple bonded channels at maximum specified output levels.
The ADA4320-1 accepts a differential or single-ended input
signal. The output is specified for driving a single-ended 75 Ω
load through a 4:1 impedance transformer.
The ADA4320-1 features an output driver stage that scales
quiescent current consumption according to gain setting. In
multichannel mode at maximum gain (32 dB), the device draws
260 mA from a single 5 V supply, enabling the high power,
ultralow distortion performance required by multiple DOCSIS 3.0
upstream channels. For lifeline E-MTA applications, the ADA4320-1
output stage current can be throttled via SPI commands, reducing
the power requirement for single-channel transmission by up to
30%. In transmit-disable mode, the ADA4320-1 draws only 12 mA.
The device also features a full power-down sleep mode that
further reduces current draw to12 μA typical.
The ADA4320-1 is packaged in a RoHS-compliant, 24-lead
exposed pad LFCSP and is rated for operation over the 40°C
to +85°C temperature range.
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