2 Ch. RS422 to LVDS Translator

SKU:

$ 1,305.25

Quantity

Item	Description
88000102-4	Cable, triple voltage, with modular plugs, Length in ft.
88000103-4	Cable, triple voltage, with modular plug and pig tail leads, Length in ft.

Product Description
Diagrams
Applications
Specifications
Documents

Applications:

Converting RS-422 Signals to LVDS Signals
High Speed Digital Communications systems Testing
High Speed SONET Clock Level Translation

Features:

f_max > 500 MHz
1.1 ns Typical Output Rise & Fall Times
Floating 124 Ω RS-422 Inputs
Differential 50 Ω LVDS Outputs
SMA or Triax I/O Connectors
Two channels for CLK/DATA translation
Self-contained 1.3 x 2.9 x 3.9-in. unit includes ±8.5 V/1.4 A AC/DC Adapter

Description

The PRL-426RS is an RS-422-to-LVDS Logic Level Translator.

The inputs of the PRL-422RS consist of two pairs of SMA connectors, each internally terminated with 124 Ω between the two signal pins. The SMA shields are tied to chassis ground. They are designed to interface with the 124 Ω differential Serial Data/Data or Clock/Clock outputs from data communications equipment. Model PRL-426RSTRI has Triax input connectors and SMA output connectors. Model PRL-426RSTR has SMA input connectors and Triax output connectors, and is available by special order.

The differential outputs are 50 Ω back-terminated and are designed for driving floating 100 Ω loads, normally the configuration used in LVDS input circuits. The output swing is typically 600 mV with a common mode voltage of 1.2 V. These high speed translators facilitate testing of high speed digital communications circuits where conversion of RS-422 clock and data signals to LVDS signals is often required.

Each unit is supplied with a ±8.5 V/1.8 A AC/DC Adaptor and housed in a 1.3 x 2.9 x 3.9-in. extruded aluminum enclosure. Available accessories include voltage distribution modules and brackets for mounting multiple units.

Fig. 1 PRL-426RS, Dual Channel RS-422 to LVDS Translator, SMA I/Os

Fig. 2 PRL-426RSTRI, Dual Channel RS-422 to LVDS Translator, Triax Inputs, SMA Outputs

(0° C ≤ T_A ≤ 35° C)*

SYMBOL	PARAMETER	PRL-426RS			UNIT
SYMBOL	PARAMETER	Min	Typ	Max	UNIT
R_IN	Input Resistance	122	124	126	Ω
R_INC	Common Mode Input Resistance		5k		Ω
V_CM	Input Common Mode Voltage	-2.0		+3.0	V
R_OUT	Output Resistance	49.5	50.0	50.5	Ω
V_OL	Output Low Level		0.9		V
V_OH	Output High Level		1.5		V
V_CMV	Common mode voltage¹		1.2		V
I_DC1	DC Input Current, +8.5 VDC		85	100	mA
I_DC2	DC Input Current, -8.5 VDC		-265	-300	mA
V_DC	DC Input Voltage	±7.5	±8.5	±12	V
V_AC	AC/DC Adapter Input Voltage	103	115	127	V
t_PLH	Propagation Delay to output ↑		2		ns
t_PHL	Propagation Delay to output ↓		2		ns
t_R/t_F	Rise/Fall Times (10%-90%)²		1.00	1.25	ns
t_SKEW	Skew between any 2 outputs³		200	500	ps
f_MAX	Max Clock Frequency⁴	500	625		MHz
	Size	1.3 x 2.9 x 3.9			in.
	Weight, excluding AC adapter	7			Oz
	Weight, including AC adapter	4			lb.

Notes:

(1) V_CMV = (V_oH-V_oL)/2

(2) Rise and Fall times are measured with SMA output connector units only and with ground-referenced 50 Ω loads.

(3) Skew is measured at the output of a PRL-425N when driven by a PRL-426RS

(4) fmax is measured using a PRL-425N with the corresponding input connectors as the receiver. The NECL outputs of the PRL-425N are measured.

Units with the Trompeter CBBJR79 Triax ouput connectors are tested using the PRL-425NTR, Universal Differential Receiver (Triax) with Differential NECL outputs, and the Trompeter PCGOW10PCG-36 shielded twisted pair cables.

All PRL products with Triax connectors use Trompeter P/N CBBJR79, Right Angle Circuit Board Bulkhead Jack, 3-lug (Numbered page 10, document page 11 of 142). Any Trompeter 70-series Triax Cable Plug with 3 lugs (e.g. PL75-9, 3-lug) will mate with CBBJR79.

While we believe these model to be accurate, no representations are made as to accuracy or suitability for any application:

PRL-426RS: