LMH2191 Texas instruments

LMH2191

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LMH2191

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Описание

The LMH2191 is a dual-channel clock tree driver that 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. It also provides protection of the master clock from varying loads and frequency pulling effects, isolation 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 LMH2191 can be clocked up to 52 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 LMH2191 dual clock distributor is offered in a tiny 1.61 mm x 1.063 mm 8-bump DSBGA package. Its small size and low supply current make it ideal for portable applications.

One Input Clock, Two Output Clocks
1.8V Square Wave Clock Outputs
Inverted Clock Outputs
Independent Clock Requests
High Isolation of Supply Noise to Clock Input
High Output-to-Output Isolation
Integrated 1.8V Low-Dropout Regulator
- Low Output-Noise Voltage
- 10 mA Load Current
EMI Filtering
Ultra Low Standby Current
V_BAT Range = 2.5V to 5.5V
8-Bump DSBGA Package

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Function	Single-ended
Additive RMS jitter (typ) (fs)	95
Output frequency (max) (MHz)	52
Number of outputs	2
Output supply voltage (V)	1.8
Core supply voltage (V)	2.5, 3.3, 5
Output skew (ps)	3.1
Features	Dual 1:2 fanout
Operating temperature range (°C)	-40 to 85
Rating	Catalog
Output type	SQUARE
Input type	SINE, SQUARE