Datasheet

LMH1983
www.ti.com SNLS309G –APRIL 2010–REVISED JANUARY 2011
ELECTRICAL CHARACTERISTICS
(1)(2)
(continued)
Unless otherwise specified, all limits are specified for T
A
= 25°C, V
DD
= 3.3V, R
L_CLK
= 100Ω (CLKout differential load).
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min
(3)
Typ
(4)
Max
(3)
Units
V
OS
Common Signal Output Voltage 100Ω differential load, CLKout1, CLKout2 or CLKout3
(8)
1.125 1.25 1.375 V
|Change to V
OD
| for
|V
OD
| 100Ω differential load, CLKout1, CLKout2 or CLKout3
(8)
50 |mV|
Complementary Output States
|Change to V
OS
| for
|V
OS
| 100Ω differential load, CLKout1, CLKout2 or CLKout3
(8)
50 |mV|
Complementary Output States
Differential clock output pins connected to GND for CLKout1,
I
OS
Output Short Circuit Current 24 |mA|
CLKout2 or CLKout3
Output buffer in shutdown mode, differential clock output
I
OZ
Output Shutdown Leakage Current 1 10 |µA|
pins connected to V
DD
or GND
VCXO Input (XOin)
Maximum Relative Frequency
f
OFF
Offset between VCXO Input and H Assumes H input jitter of ±15 ns ±150 ppm
Input
Single-ended Signal Input Voltage
V
XOin_SE
Single-ended input buffer mode 0 V
DD
V
Range
Differential Signal Input Voltage
V
XOin_DIFF
Differential input buffer mode, V
CM
= 1.2V 247 350 454 mV
Range
Digital Holdover and Free-Run Specifications
V
VCout_RNG
DAC Output Voltage Range Digital Free-run Mode 0.5 V
DD
-0.5V V
SUPPORTED STANDARDS AND TIMING FORMATS
Table 1 lists the supported standard timing formats. The table includes the relevant parameters used to configure
the LMH1983 for the input and output formats. Auto-detection of the input is supported for the formats listed in
Table 1. The input format can also be manually programmed by the host via I
2
C if its necessary to override the
auto-detection feature.
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