TIME (ns)

1.8

1.3

0.9

0.4

0.0

-0.5

-10

0

10

20

30

40

50

CLK1 OUTPUT @ 26 MHz

CL = 22 pF

CL = 33 pF

CL = 50 pF

CL = 10 pF

TIME (ns)

1.8

1.3

0.9

0.4

0.0

-0.5

15

25

35

CLK1 OUTPUT @ 52 MHz

CL = 22 pF

CL = 33 pF

CL = 50 pF

CL = 10 pF

TIME (ns)

1.8

1.3

0.9

0.4

0.0

-0.5

-60

-50

-40

-30

-20

-10

0

CLK1 OUTPUT @ 19 MHz

CL = 22 pF

CL = 33 pF

CL = 50 pF

CL = 10 pF

POWER SUPPLY REJECTION RATIO

100

90

80

70

60

50

40

100

1k

10k

100k

1M

10M

VBAT: No Capacitors

COUT: 2.2 PF

FREQUENCY OFFSET (Hz)

-110

-120

-130

-140

-150

-160

-170

100

1k

10k

100k

1M

CLK1 - 19 MHz

CLK2_26 MHz

CLK1 - 26 MHz

CLK2_19 MHz

TIME (Ps)

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

-0.2

-2k

0

2k

4k

6k

8k

10k

CLK REQ

LDO 10 mA

LDO 1 mA

LMH2191

www.ti.com

SNAS485D – JULY 2010 – REVISED MAY 2013

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Unless otherwise specified, TA = 25°C, VBAT = 3.5V, fSCLK_IN = 26 MHz, COUT = 2.2 µF

Additive Phase Noise

vs.

LDO output voltage OFF timing

Frequency Offset

Figure 11.

Figure 12.

Power Supply Rejection Ratio

vs.

CLK1 Pulse Response 10-50pF @ 19MHz

Frequency

Figure 13.

Figure 14.

CLK1 Pulse Response 10-50pF @ 26MHz

CLK1 Pulse Response 10-50pF @ 52MHz

Figure 15.

Figure 16.

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