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参数资料
| 型号： | MAX3971AUTP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC AMP LIMIT 10.7GBPS 20-TQFN |
| 标准包装： | 2,500 |
| 类型： | 限幅放大器 |
| 应用： | 光纤学网络 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
Pin Description
PIN
NAME
FUNCTION
1
GNDIN+
Input Ground for Shielding Input Signal IN+. Not connected internally.
2
IN+
Noninverting Input Signal
3
IN-
Inverting Input Signal
4
GNDIN-
Input Ground for Shielding Input Signal IN-. Not connected internally.
5, 7, 9, 10
N.C.
No Connection. Leave unconnected.
6, 8, 11
GND
Ground
12, 15
VCC3
Output Circuitry Power Supply
13
OUT-
Inverting Output of Amplifier
14
OUT+
Noninverting Output of Amplifier
16
DISABLE
When DISABLE is connected to VCC or left floating, outputs are disabled. When DISABLE is
connected to GND, outputs are enabled.
17
VCC2
Power Supply to Circuitry other than Input and Output Circuits
18
CZ+
Filter Capacitor for Offset Correction. Connect CZ between pin 18 and pin 19. See the Detailed
Description section.
19
CZ-
Filter Capacitor for Offset Correction. Connect CZ between pin 18 and pin 19. See the Detailed
Description section.
20
VCC1
Input Circuitry Power Supply
—
EP
Exposed Pad. Must be soldered to supply ground for proper electrical and thermal operation.
MAX3971A
+3.3V, 10.7Gbps Limiting Amplifier
_______________________________________________________________________________________
5
Detailed Description and
Applications Information
Figure 1 is a functional diagram of the MAX3971A limit-
ing amplifier. The signal path consists of an input buffer
followed by a gain stage and output amplifier. A feed-
back loop provides offset correction by driving the
average value of the differential output to zero.
Gain Stage and Offset Correction
The limiting amplifier provides approximately 42dB
gain. The large gain makes the amplifier susceptible to
small DC offsets, which cause deterministic jitter. A
low-frequency loop is integrated into the limiting ampli-
fier to reduce output offset, typically to less than 2mV.
The external capacitor (CZ) is required for stability and
to set the low-frequency cutoff for the offset correction
loop. The time constant of the loop is set by the product
of an equivalent 20k
Ω on-chip resistor and the value of
the off-chip capacitor (CZ). For stable operation, the
minimum value of CZ is 0.01F. To minimize pattern-
dependent jitter, CZ should be as large as possible.
For 10Gbps ethernet and SONET applications, the typi-
cal value of CZ is 0.1F. Keep CZ close to the package
to reduce parasitic inductance.
CML Input Circuit
The input buffer is designed to accept CML input sig-
nals such as the output from the MAX3970 transimped-
ance amplifier. An equivalent circuit for the input is
shown in Figure 2. For lowest deterministic jitter in all
operating conditions, AC-coupling capacitors are rec-
ommended on the input.
MAX3971A
CZ-
CZ+
LOWPASS
FILTER
CZ
OFFSET
CORRECTION
AMP
INPUT
AMPLIFIER
GAIN
42dB
OUTPUT
AMPLIFIER
OUT+
OUT-
IN+
GNDIN+
GNDIN-
IN-
DISABLE
100
Ω
Figure 1. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3975EVKIT | 功能描述:交换机 IC 开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
| MAX3975UBA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3975UBA-T | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX397C/D | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX397C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
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