The PRL-430AN is a dual channel, differential/single-ended input NECL receiver module with complementary outputs. It is intended for converting single-ended signals, including GHz sine waves, into differential NECL signals for driving long lines and for receiving differential signals from long lines.
A switch selects either single-ended or differential inputs, as shown in Fig. 1. In the differential input mode, both inputs D and D are terminated internally into 50 Ω/-2 V, and, therefore, either one or both inputs can accept AC coupled signals as well. In the single-ended input mode, signals should be connected to the D inputs only. The D inputs are switched internally to VBB, nominally -1.3 V, and termination resistors RT for the D input channels are changed to 62 Ω. Complementary outputs of the PRL-430AN are designed for driving 50 Ω loads terminated into -2 V. With internal pull-down resistors these outputs can also be AC coupled for driving 50 Ω loads terminated to ground or to other voltages.
The PRL-430AN is housed in a 1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and supplied with a ±8.5 V/1.8 A AC/DC adapter.
Fig. 1, PRL-430AN Block Diagram
(0° C ≤ TA ≤ 35° C)*
|VTT||D Input Termination Voltage (fixed)||-2.2||-2.0||-1.8||V|
|VT1||D Input Termination Voltage (variable)||-1.17||-1.30||-1.43||V|
|VT2||D Input Termination Voltage||-2.2||-2.0||-1.8||V|
|VIL||Input Lo Voltage||-1.95||-1.60||-1.48||V|
|VIH||Input Hi Voltage||-1.13||-0.90||-0.81||V|
|VOL||Output Lo Voltage||-1.95||-1.70||-1.48||V|
|VOH||Output Hi Voltage||-1.13||-0.90||-0.81||V|
|IDC||DC Input Current||-235||-250||mA|
|VDC||DC Input Voltage||-7.5||-8.5||-12||V|
|VAC||AC/DC Adapter Input Voltage||103||115||127||V|
|TPLH||Propagation Delay to output ↑||750||950||ps|
|TPHL||Propagation Delay to output ↓||750||950||ps|
|tr/tf(1)||Rise/Fall Times (20%-80%)||250||ps|
|TSKEW||Skew between Q & Q outputs||20||75||ps|
|FMAX(2)||Max clock frequency||4||GHz|
|VCMR||Common Mode Range||-2.7||-0.4||V|
|Size||1.3 x 2.9 x 2.2||in.|
|Weight, excluding AC adapter||5||Oz|
|Shipping weight, including AC adapter||4||lb.|
*All measurements are made with outputs terminated into 50 Ω/VTT, using the PRL-550NQ4X four channel NECL Terminator, connected to a 50 Ω input sampling oscilloscope.
(1). The output rise and fall times are measured with both the Q and Q outputs terminated into 50 Ω/VTT. An unused complementary output must be either terminated into 50 Ω/VTT or AC coupled into a 50 Ω; otherwise, output waveform distortion and rise time degradation will occur. Use the PRL-550NQ4X four channel NECL Terminator for the 50 Ω/-2 V termination and for connection of NECL signals to 50 Ω input oscilloscopes.
(2). fMAX is measured by AC coupling a sine wave to the D input using the differential input mode (switch up). The differential outputs are first divided by four, using the PRL-255N, and then measured using the PRL-550NQ4X four channel NECL Terminator, connected to a sampling scope.