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參數(shù)資料
| 型號： | MAX3660ETE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TRANSIMPEDANCE AMP 16TQFN-EP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 轉(zhuǎn)阻放大器 |
| 應(yīng)用： | CATV |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN-EP（4x4） |
| 包裝： | 帶卷 (TR) |
MAX3660
Analog CATV Transimpedance Amplifier
_______________________________________________________________________________________
5
Pin Description
PIN
NAME
FUNCTION
1, 4, 9, 12
VCC
+5.0V Supply
2
IN+
Positive Analog Input. Connect to photodiode cathode.
3
IN-
Negative Analog Input. Connect to photodiode anode.
5
VAGC
AGC Control Input. See the Gain (ZT) vs. Frequency graph.
6
MUTE
Active-Low Mute Control Input. VMUTE < 0.8V to disable output.
7
HYST
AGC Hysteresis Control Input. A resistor from HYST to GND controls the hysteresis level.
8, 14, 15, 16
GND
Supply Ground
10
OUT-
Negative RF Output
11
OUT+
Positive RF Output
13
TEST
Reserved for test. Connect to GND for normal operation.
—
EP
Exposed Pad. The exposed pad must be soldered to the circuit board ground for proper thermal
and electrical performance.
Detailed Description
The MAX3660 variable gain TIA has differential AC-
coupled photocurrent inputs and 75
Ω differential RF
output. When used with a low-cost operational amplifi-
er, photodiode assembly, bias network, and balun, the
MAX3660 provides a complete high-performance
BPON/GPON video receiver with a simple and effective
feed-forward AGC. It can also be used with feedback
AGC.
Low-Noise Variable-Gain Amplifier
The low-noise differential input is designed to be AC-
coupled to the anode and cathode of the analog photo-
diode in a PON triplexer. The maximum input current to
achieve rated linearity is 1.675mAP-P.
Very low TIA input impedance provides excellent fre-
quency response with no (internal or external) compen-
sation between photodiode and amplifier, thus
simplifying design, manufacturing, and photodiode
selection.
VAGC and Hysteresis Control
The overall transimpedance is controlled using the VAGC
input pin. See the
Typical Operating Characteristics for
descriptions of the transimpedance, OIP2 (CSO), and
OIP3 (CTB) performance for VAGC voltages between 0
and 1.8V.
The MAX3660 has a very flat and stable gain vs. volt-
age characteristic in the range 0.175V
≤ VVAGC ≤ 1.4V,
enabling a simple feed-forward AGC based on average
optical power level as measured by the photodiode DC
current (see Figure 4 for the EV kit schematic).
Feedback AGC can be used to achieve a wider
dynamic range, in which case the VAGC voltage would
be controlled by an external power detector, such as
the MAX2014, typically through a microcontroller inter-
face. In this case, the maximum voltage at VAGC
should be kept below approximately 1.65V to maintain
adequate linearity levels for typical GPON applications.
The forward signal path is implemented with three
switched variable gain stages, each covering one-third
of the total dynamic range. When the voltage input at
VAGC crosses the points on the Gain (ZT) vs. VAGC
curve where a new stage is selected (VVAGC = 350mV
and VVAGC = 700mV), there can be a small (approxi-
mately 50ns) deviation in the output, causing an inter-
ruption to the CATV signal. Hysteresis is provided for
the VAGC input to prevent the output signal from dither-
ing when the average optical input level is very close to
one of these two switching points. The amount of hys-
teresis can be controlled by the value of RHYST, and is
minimum (0.14dB) when RHYST is open.
RF Output and Cable Tilt Compensation
The MAX3660 includes integrated cable compensation
(uptilt). With a photodiode assembly similar to that
described in Figure 1, the output at 870MHz is 4dB
higher compared to the output at 47MHz. About half of
the uptilt is due to the combination of photodiode
capacitance and the inductance of the triplexer leads,
and half is internal to the MAX3660.
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| MAX3660EVKIT | 制造商:Maxim Integrated Products 功能描述:PCB THAT PROVIDES AN OPTICAL INPUT WITH AN ELECTRICAL OUTPUT - Bulk |
| MAX3663ETG | 功能描述:激光驅(qū)動器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3663ETG+ | 功能描述:激光驅(qū)動器 Integrated Circuits (ICs) RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3663ETG+T | 功能描述:激光驅(qū)動器 Integrated Circuits (ICs) RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3663ETG-T | 功能描述:激光驅(qū)動器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
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