PRL-444LV, 4 Channel TTL/CMOS to LVDS Level Translator and Line Driver

Applications:

• TTL to LVDS Logic Level Translation
• Conversion of Single-Ended TTL Signals to Differential Signals for Driving Long Lines
• Mini Modular Instrument for interfacing with High Speed Data Communications Equipment

Features:

• 250 MHz Typical Maximum Clock Rate
• 4 Single Ended Inputs with Selectable 50 Ω or 1 kΩ Termination
• 4 LVDS Outputs for Driving 50 Ohm Cables into 100 Ω Floating Loads
• SMA I/O Connectors
• Single Supply, +7.5 VDC to +12 VDC, operation
• Ready-to-Use 1.3 x 2.9 x 2.9-in. Module includes a ±8.5 V/1.4 A AC/DC Adapter

Description

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.