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| 型号： | MAX9213EUM+D |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/18页 |
| 文件大小： | 0K |
| 描述： | IC SERIALIZER PROG 48-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 39 |
| 功能： | 串行器 |
| 数据速率： | 1.785Gbps |
| 输入类型： | LVTTL/LVCMOS |
| 输出类型： | LVDS |
| 输入数： | 21 |
| 输出数： | 3 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-TFSOP（0.240"，6.10mm 宽） |
| 供应商设备封装： | 48-TSSOP |
| 包装： | 管件 |
MAX9209/MAX9213
Programmable DC-Balanced
21-Bit Serializers
14
______________________________________________________________________________________
Applications Information
Selection of AC-Coupling Capacitors
Voltage droop and the DSV of transmitted symbols
cause signal transitions to start from different voltage
levels. Because the transition time is finite, starting the
signal transition from different voltage levels causes
timing jitter. The time constant for an AC-coupled link
needs to be chosen to reduce droop and jitter to an
acceptable level.
The RC network for an AC-coupled link consists of the
LVDS receiver termination resistor (RT), the LVDS driver
output resistor (RO), and the series AC-coupling capac-
itors (C). The RC time constant for two equal-value
series capacitors is (C x (RT + RO)) / 2 (Figure 14). The
RC time constant for four equal-value series capacitors
is (C x (RT + RO)) / 4 (Figure 15).
RT is required to match the transmission line imped-
ance (usually 100
) and RO is determined by the LVDS
driver design, with a minimum value of 78
(see the DC
Electrical Characteristics table). This leaves the capaci-
tor selection to change the system time constant.
In the following example, the capacitor value for a
droop of 2% is calculated. Jitter due to this droop is
then calculated assuming a 1ns transition time:
C = -(2 x tB x DSV) / (ln (1 - D) x (RT + RO)) (Eq 1)
where:
C = AC-coupling capacitor (F)
tB = bit time (s)
DSV = digital sum variation (integer)
ln = natural log
D = droop (% of signal amplitude)
RT = termination resistor (
)
(7 + 2):1
1:(9 - 2)
7
RT =
100
RT =
100
RT =
100
RT =
100
(7 + 2):1
1:(9 - 2)
7
(7 + 2):1
1:(9 - 2)
7
PLL
MAX9209
MAX9213
MAX9210
MAX9214
TxOUT
TxCLK OUT
RxIN
RxCLK IN
21:3 SERIALIZER
3:21 DESERIALIZER
PWRDWN
RxCLK OUT
RxOUT
PWRDWN
TxCLK IN
TxIN
HIGH-FREQUENCY CERAMIC
SURFACE-MOUNT CAPACITORS
RO
Figure 15. Four Capacitors per Link, AC-Coupled, DC-Balanced Mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9214 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable DC-Balance 21-Bit Deserializers |
| MAX9214ETM | 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE DC-BALANCE 21-BIT DESERIALIZER - Rail/Tube |
| MAX9214EUM | 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE DC-BALANCE 21-BIT DESERIALIZER - Rail/Tube |
| MAX9214EUM+ | 功能描述:串行器/解串器 - Serdes RoHS:否 制造商:Texas Instruments 类型:Deserializer 数据速率:1.485 Gbit/s 输入类型:ECL/LVDS 输出类型:LVCMOS 输入端数量:1 输出端数量:20 工作电源电压:2.375 V to 2.625 V 工作温度范围:0 C to + 70 C 封装 / 箱体:TQFP-64 |
| MAX9214EUM+D | 功能描述:串行器/解串器 - Serdes RoHS:否 制造商:Texas Instruments 类型:Deserializer 数据速率:1.485 Gbit/s 输入类型:ECL/LVDS 输出类型:LVCMOS 输入端数量:1 输出端数量:20 工作电源电压:2.375 V to 2.625 V 工作温度范围:0 C to + 70 C 封装 / 箱体:TQFP-64 |
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