The PRL-444LV-SMA is a 4 Channel TTL to LVDS translator module.
The input resistance of the PRL-444LV-SMA inputs can be selected to be either 50 Ω or 1 kΩ by a common toggle switch. The 1 kΩ inputs are desirable when interfacing with low power circuits.
The four pairs of complementary outputs are designed for driving floating 100 Ω loads, normally the configuration used in LVDS input circuits. The output swing is typically 300 mV with a common mode voltage of 1.0 V.
All I/Os are DC coupled and have SMA connectors. A block diagram showing the equivalent input and output circuits of the PRL-444LV-SMA is shown in Fig. 1.
The PRL-444LV-SMA is housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure and is supplied with a ±8.5 V/±1.4 A AC/DC Adapter. The PRL-444LV-SMA may also be ordered without the power supply as part number PRL-444LV-SMA-OEM. A maximum of four units can share the included PRL-760C AC/DC adapter using additional units of cable #88000102-4. If mounting is desired, a pair of the #35001420 mounting brackets can accommodate any two PRL modules of the same length.
A complementary product, the PRL-425QLT-SMA, performs the opposite conversion of 4 LVDS signals to 4 TTL signals. The coaxial outputs can also be adapted to off-the-shelf Cat5/Cat5e/Cat6a network cabling, and then back again to coax, via one or more PRL-RJ45-SMA adapters.
PRELIMINARY SPECIFICATIONS: (0° C ≤ TA ≤ 35° C)*
|VIL||TTL input Low Level||-0.5||0.0||0.5||V|
|VIH||TTL input High Level||2.0||2.4||5.0||V|
|VDC||DC Input Voltage||7.5||8.5||12.0||V|
|VAC1||AC/DC Adapter Input Voltage, 120||103||115||127||V|
|VAC1||AC/DC Adapter Input Voltage, 220||206||230||254||V|
|IDC1||DC Input Current @ 50 MHz||65||85||mA|
|IDC2||DC Input Current @ 250 MHz||125||mA|
|VOPP||Output Differential Voltage, peak-to-peak||250||300||450||mV|
|VCMO||Output Common mode voltage1||1.0||1.2||V|
|tPLH||Propagation Delay to output ↑||2||3||ns|
|tPHL||Propagation Delay to output ↓||2||3||ns|
|tr/tf1||Rise/Fall Times (10%-90%)1||1.0||1.8||ns|
|fMAX||Max Clock Frequency||200||250||MHz|
|tSKEW||Skew between any 2 outputs||300||750||ps|
|DTY||Duty Cycle @ 50 MHz||45/55|
|Size||1.3 x 2.9 x 2.9||in.|