The LMH2190 is a quad channel configurable clock tree driver which supplies a digital system clock to peripherals in mobile handsets or other applications. It provides a solution to clocking issues such as limited drive capability for fanout or longer traces, protection of the master clock from varying loads and frequency pulling effects, isolation buffering from noisy modules, and crosstalk isolation. It has very low phase noise which enables it to drive sensitive modules such as Wireless LAN and Bluetooth.

The LMH2190 can be clocked up to 27 MHz, and has an independent clock request pin for each clock output which allows the peripheral to control the clock. It features an integrated LDO which provides an ultra low noise voltage supply with 10 mA external load current which can be used to supply the TCXO or other clock source.

The I²C serial interface can be used to override the default configuration of the device to optimize the LMH2190 for the application. Some of these programmable features include setting the polarity of both the clock and the clock request inputs. In addition, the clock outputs have programmable output drive current to optimize for the connected load. EMI switching noise can be controlled by configuring output drive and skew settings.

The LMH2190 quad clock distributor is offered in a tiny 1.61mm x 1.61mm 16 bump DSBGA package. Its small size and low supply current make it ideal for portable applications.

• 1 Input Clock, 4 Output Clocks
• Supports both Square or Sine Wave Input
• 1.8V Square Wave Clock Outputs
• Skewed Clock Outputs
• Independent Clock Request
• High Isolation of Supply Noise to Clock Input
• High Output to Output Isolation
• Output Drive up to 50 pF
• EMI Controlled Output Edges and EMI Filtering
• Integrated 1.8V Low-Dropout Regulator
  • Low Output Noise Voltage
  • 10 mA load Current
• I2C Configurable up to 400 kHz (Fast Mode)
• Ultra Low Standby Current
• VBAT Range = 2.5V to 5.5V

All trademarks are the property of their respective owners.

• Function
• Single-ended
• Additive RMS jitter (Typ) (fs)
• 100
• Output frequency (Max) (MHz)
• 27
• Number of outputs
• 4
• Output supply voltage (V)
• 1.8
• Core supply voltage (V)
• 2.5, 3.3, 5
• Output skew (ps)
• 8.5
• Features
• 1:4 fanout
• Operating temperature range (C)
• -20 to 85
• Rating
• Catalog
• Output type
• SQUARE
• Input type
• SINE, SQUARE

LMH2190的完整型号有：LMH2190TM-38/NOPB，以下是这些产品的关键参数及官网采购报价：

LMH2190TM-38/NOPB，工作温度：-20 to 85，封装：DSBGA (YFQ)-16，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LMH2190TM-38/NOPB的批量USD价格：1.628（1000+）

LMH2190TMEVAL — 用于 LMH2190 的评估板

The LMH2190EVAL board helps evaluating the LMH2190 Quad Channel 26 MHz Clock Tree Driver with I2C. It is designed such that it gives maximum flexibility in evaluating the LMH2190 in various configurations.

The LMH2190 provides a digital system clock to peripheral devices in mobile handsets. It (...)

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