12.5 Gb/s Driver Amplifier LABware Module
PSPL8001 Datasheet
The PSPL8001 12.5 Gb/s Driver Amplifier LABware Module is designed for
bench-top lab use. This LABware module can simply be plugged in with a
line cord (either 110 V or 220 V) and the driver amplifier is ready for use.
The PSPL8001 is ideal for driving Lithium Niobate optical modulators using
NRZ signals for test and characterization experiments. The PSPL8001 can
also be used as a linear amplifier with 26 dB gain and 12 GHz bandwidth
for inputs less than ±150 mV (300 mVp-p with 50% duty cycle).
Key performance specifications
LABware bench-top instrument
12.5 Gb/s Driver Amplifer
7.5 Vpp output amplitude
Linear amplifier with 26 dB gain
30 kHz to 12 GHz bandwidth
Integrated power supplies, amplitude, and crossing-point controls
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Typical performance
Datasheet
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The Amplitude (A) control has very little effect on the output voltage under
small signal conditions. Generally, it should be set to 10.0 when the
PSPL8001 is used as a linear amplifier. The Crossing Point (XP) control
sets the bias point of the amplifier. It should be set to 5.0. Both the
Amplitude (A) and Crossing Point (XP) controls have locking levers. Be
sure that the locks are released before rotating the knobs.
The Crossing Point (XP) control provides an adjustment for the crossing
point of NRZ signals. By shifting the bias point, it can also compensate for
NRZ signals that do not have a Mark Ratio of 1:2, RZ signals, or signals
with low or high duty cycles.
The PSPL8001 is AC-coupled at the Input and Output, and the average
value of the output signal (the DC component) must be at 0 V. Most NRZ
data streams are conditioned to have a 50% duty cycle when averaged
over a long period, about a microsecond. Those signals make full use of
the positive and negative halves of the amplifier’s operating range.
The average amplitude of low duty cycle signals can be virtually at the
baseline. These signals use only one half of the PSPL8001 operating
range, and the maximum output amplitude may be 4 V instead of 8 V. The
Crossing Point (XP) control can shift the amplifier’s operating point and
increase the output amplitude up to 6 V in some cases.
It is recommended that the PSPL8001 be driven with a negative polarity
signal when the duty cycle is very low. Narrow positive pulses can generate
excessive heat within the PSPL8001 and damage the amplifier. Similarly,
large duty signals should be positive.
Typical 10.0 Gb/s eye measurements
Input test signal
Output response
Caution: The PSPL8001 contains a static sensitive amplifier. To avoid
damage from static electricity, always short the terminals of a device before
connecting it to the input or output of the PSPL8001. Even coax cables
must be shorted before making the connection.
12.5 Gb/s Driver Amplifier LABware Module
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Specifications
Small signal (linear) conditions
Parameter Symbol Units Minimum Typical Maximum Comments
Upper 3 dB freq. fc,h GHz 12 Relative to gain at 2 GHz
Lower 3 dB freq. fc,l kHz 30 Relative to gain at 2 GHz
Small signal gain S21 dB 26.5 Measured at 2 GHz
Max Power Out
(-1 dB gain comp)
P1dB
dBm
23.5
20.5
Measured at 2 GHz
Square wave
Sine wave
Return Loss, Input and Output S11, S22 dB -14
-11
-12
-9
50 MHz < f < 5 GHz
5 GHz ≤ f < 12 GHz
Noise Figure NF dB 5.75 6.5 f = 1 GHz
Large signal conditions
Parameter Symbol Units Minimum Typical Maximum Comments
Impedance Z Ohms 50
Output Eye Voltage
with Amplitude (A) control = 10.0
VOUT Vamp 7.0 7.5 Vin = 0.5 Vamp, 12.5 Gb/s PRBS
Output Eye Voltage
with Amplitude (A) control = 0.0
VOUT Vamp 3.2 4.0 Vin = 0.5 Vamp, 12.5 Gb/s PRBS
Rise Time trps 32 41 10-90%, Vin = 0.5 Vamp, 12.5 Gb/s
PRBS
Fall Time tfps 36 44
Additive Jitter
RMS
Peak-to-Peak
ps
pspp
0.7
4
2.0
8
Vin = 0.5 Vamp, 12.5 Gb/s PRBS,
meas. at crossing point
Crossing Point (XP) Adjust, Amplitude
(A) control = 10.0
% +/-10 +/-15 Vin = 0.5 Vamp
Overshoot % 5 12.5 Gb/s PRBS
Undershoot % 5 12.5 Gb/s PRBS
Polarity Non-Inverting
Coupling AC, input and output
RF Connectors SMA jacks (f)
Operating specifications
Parameter Comments
Max Allowed Input 1.5 Max Vamp (damage threshold for input)
AC Power 100, 117, 200, or 230 VAC, 50/60 Hz, 15VA (60 Hz)
Environment
Operating
Storage
(Indoors, 80% relative humidity)
20 °C to 30 °C
0 °C to 50 °C
Safety Certifications Conforms to EN-061010-1 (CE mark), UL-1244 and IEC-348. Safety class I.
For lab use by qualified personnel.
Dimensions 9.6 x 7.5 x 1.7 in. (244 x 190 x 33 mm)
Weight 3.3 lbs. (1.5 kg)
Accessories USA power cord
Warranty One Year
Datasheet
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Ordering information
Models
PSPL8001 DRIVER AMPLIFIER, 12.5G b/s, LABware
12.5 Gb/s Driver Amplifier LABware Module
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Datasheet
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* European toll-free number. If not accessible, call: +41 52 675 3777 Updated 10 April 2013
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25 Jul 2014 1PW-30543-0
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