- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄5814 > MAX3798ETJ+ (Maxim Integrated Products)IC LIMITING AMP/VCSEL DVR 32TQFN PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX3798ETJ+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 21/35頁 |
| 文件大小： | 0K |
| 描述： | IC LIMITING AMP/VCSEL DVR 32TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 放大器類型： | 限制 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分 |
| 電流 - 電源： | 97mA |
| 電壓 - 電源，單路/雙路(±)： | 2.85 V ~ 3.63 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-TQFN-EP（5x5） |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 1387 (CN2011-ZH PDF) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
MAX3798
impromptu deemphasis adjustment, it is recommended
that the DE_INC (MODINC[5]) bit is used. Use of this bit
increments or decrements the deemphasis code setting
by 1 LSB based on the sign of increment in the
MODINC[4:0] and, hence, the SET_IMOD[8:0] setting.
This helps maintain the BER while having the flexibility to
improve signal quality by adjusting deemphasis while
the transmit operation continues. This feature enables
glitchless deemphasis adjustment while maintaining
excellent BER performance.
Programming Pulse-Width Control
The eye crossing at the Tx output can be adjusted
using the SET_PWCTRL register. Table 6 shows these
settings.
The sign of the number specifies the direction of pulse-
width distortion. The code of 1111 corresponds to a
balanced state for differential output. The pulse-width
distortion is bidirectional around the balanced state
(see the
Typical Operating Characteristics section).
Programming CML Output Settings
Amplitude of the CML output stage is controlled by an
8-bit DAC register (SET_CML). The differential output
amplitude range is from 40mVP-P up to 1200mVP-P with
4.6mVP-P resolution (assuming an ideal 100
Ω differen-
tial load).
Output Voltage ROUT (mVP-P) = 40 + 4.55 (SET_CML)
Select the Coupling Capacitor
For AC-coupling, the coupling capacitors CIN and
COUT should be selected to minimize the receiver’s
deterministic jitter. Jitter is decreased as the input low-
frequency cutoff (fIN) is decreased.
fIN = 1/[2
π(50)(CIN)]
The recommended CIN and COUT is 0.1μF for the
MAX3798.
Select the Offset-Correction Capacitor
The capacitor between CAZ1 and CAZ2 determines the
time constant of the signal path DC-offset cancellation
loop. To maintain stability, it is important to keep at
least a one-decade separation between fIN and the
low-frequency cutoff (fOC) associated with the DC-off-
set cancellation circuit. A 1nF capacitor between CAZ1
and CAZ2 is recommended for the MAX3798.
Applications Information
Layout Considerations
To minimize inductance, keep the connections between
the MAX3798 output pins and laser diode as close as
possible. Optimize the laser diode performance by
placing a bypass capacitor as close as possible to the
laser anode. Use good high-frequency layout tech-
niques and multiple-layer boards with uninterrupted
ground planes to minimize EMI and crosstalk.
Exposed-Pad Package
The exposed pad on the 32-pin TQFN provides a very
low-thermal resistance path for heat removal from the IC.
The pad is also electrical ground on the MAX3798 and
must be soldered to the circuit board ground for proper
thermal and electrical performance. Refer to Application
Note 862:
HFAN-08.1: Thermal Considerations of QFN
and Other Exposed-Paddle Packages for additional
information.
Laser Safety and IEC 825
Using the MAX3798 laser driver alone does not ensure
that a transmitter design is compliant with IEC 825. The
entire transmitter circuit and component selections
must be considered. Each user must determine the
level of fault tolerance required by the application, rec-
ognizing that Maxim products are neither designed nor
authorized for use as components in systems intended
for surgical implant into the body, for applications
intended to support or sustain life, or for any other
application in which the failure of a Maxim product
could create a situation where personal injury or death
could occur.
1.0625Gbps to 10.32Gbps, Integrated, Low-
Power SFP+ Limiting Amplifier and VCSEL Driver
28
______________________________________________________________________________________
SET_PWCTRL[3:0]
PWD
SET_PWCTRL[3:0]
PWD
1000
-7
0111
8
1001
-6
0110
7
1010
-5
0101
6
1011
-4
0100
5
1100
-3
0011
4
1101
-2
0010
3
1110
-1
0001
2
1111
0
0000
1
Table 6. Eye-Crossing Settings for
SET_PWCTRL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BK1/S506-6.3-R | FUSE 6.3A 250V TLAG GLS 5X20 IEC |
| BK/S506-5-R | FUSE 5A 250V T-LAG GLASS S506 |
| 2095-300-BLF | SURGE ARRESTOR GDT 3000V AXIAL |
| BK/ATC-1 | FUSE BLADE 1A 32V BLACK UL |
| 2095-200-BLF | SURGE ARRESTOR GDT 2000V AXIAL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3798ETJ+ | 功能描述:激光驅(qū)動(dòng)器 1.0625-10.32Gbps SFP w/VCSEL Driver 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 |
| MAX3798ETJ+T | 功能描述:激光驅(qū)動(dòng)器 1.0625-10.32Gbps SFP w/VCSEL Driver 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 |
| MAX3799E/D | 功能描述:限幅放大器 1Gbps to 14Gbps SFP+ Multirate Limiting Amplifier and VCSEL Driver RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| MAX3799ETJ+ | 功能描述:限幅放大器 1-14Gbps SFP w/VCSEL Driver RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| MAX3799ETJ+T | 功能描述:限幅放大器 1-14Gbps SFP w/VCSEL Driver RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。