SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772 051-0 • Fax +49 30 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF L806 ABroadband Linear Amplifier

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Description
The SHF L806 A is the RoHS compliant successor to the popular SHF 806 E driver amplifier. It offers
more gain and bandwidth than the 806 E.
The L806 A is a three-stage amplifier design, using proprietary monolithic microwave integrated circuits(MMICs) inside special carriers to achieve ultra-wide bandwidth and low noise performance. An internal
voltage regulation protects the amplifier against accidental reverse voltage connection and makes it
robust against line voltage ripple.

Ease of Use
Upon delivery, the amplifier is already pre-set to deliver maximum gain, maximum output amplitude andnominally 50% crossing. The small signal gain could be reduced by applying a negative voltage to theGain control pin. By applying a positive or negative voltage to the Crossing control pin the Crossing
could be adjusted. For more detailed information see page 10.

Available Options
1

01: DC return on input (max. ±1.75 V, max. 35 mA)

02: Built-in bias tee on input (max. ±9 V, max. 200 mA)
03: DC return on output (max. ±1.75 V, max. 35 mA)

1

1

04: Built-in bias tee on output (max. ±9 V, max. 200 mA)

1

MP: Matches the phase of two amplifiers

1The options 01 & 02 or 03 & 04 cannot be combined.
If an option is chosen, maximum gain and output power might be reduced by up to 1 dB and the low frequency 3 dB point might be increased
up to 70 kHz. The DC resistance of a bias tee is about 4 Ω.

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Specifications – SHF L806 AParameter

Unit

SymbolMin

TypMax

Conditions

Maximum RF Input Powerin OperationdBm
V

Pin max

00.63

peak to peak voltage

Maximum RF Input Powerwithout Power SupplydBm
VPin max

102

peak to peak voltage

DC Voltage at RF Input

V±9AC coupled input

DC Voltage at RF Output

V±9AC coupled output

Gain Control Voltage

V-6-5…0+6will not exceed 0.02 ACrossing Control Voltage

V-6-5…+5+6will not exceed 0.02 A

Supply Voltage

V8.5

100.7 A, reverse voltage protected

Absolute Maximum Ratings

Case Temperature

22Tcase°C

104055

If operated with heat sink (part of the delivery) at room temperature there is no need for additional cooling.

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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ParameterUnit

SymbolMin

TypMax

Conditions

Electrical Characteristics (At 40°C case temperature, unless otherwise specified)High Frequency 3 dB Point

GHz

fHIGH

40Low Frequency 3 dB Point

kHz

fLOW

Gain

dB

S21

Max. Gain ReductiondB

Output Power at 1 dB
Compression

dBm
V

P01dB

17.5
4.7

10 MHz…20 GHz

Output Power at 2 dB
Compression

dBm
V

P02dB

19.5
5.9

10 MHz…20GHz

Output Power at 3 dB
Compression

dBm
V

P03dB

20.5
6.7

10 MHz…20 GHz

Crossing Control
Range%

Input ReflectiondB

S11Output Reflection

dBS224028292.5

3inverting
measured at Pin=-27 dBm

4peak to peak voltage

peak to peak voltage

peak to peak voltage-55at 6 Vpp-12-10-10-9< 10 GHz-10-9< 35 GHz< 35 GHz

20%...80%

Rise Time/Fall Time

Jitterps

fstr/tf

JRMS

600
700

1115

Deconvoluted

720
800

Deconvoluted

3,43

Full Setup

Full Setup

3,43

measured at 44 Gbps / 6 Vpp

Group Delay Ripple

psPower Consumption

W±50
5.4

2 GHz…30 GHz, 160 MHz aperture
9 V / 0.6A

Mechanical Characteristics
5Input Connector

1.85 mm (V) female

Output Connector

1.85 mm (V) male

345

Measured with SHF BPG 40 A (at full scale) -> DUT (SHF L806 A) -> Agilent 86100C with 70 GHz sampling head & precision time base.
Calculation based on typical results of setup without DUT :𝑡𝑟 /𝑡𝑓 𝑑𝑒𝑐𝑜𝑛𝑣𝑜𝑙𝑢𝑡𝑒𝑑 = √(𝑡𝑟 /𝑡𝑓 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − (𝑡𝑟 /𝑡𝑓 𝑠𝑒𝑡𝑢𝑝 𝑤/𝑜 𝐷𝑈𝑇 )2 = √(𝑡𝑟 /𝑡𝑓 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − 11 𝑝𝑠 2
2𝐽𝑅𝑀𝑆 𝑑𝑒𝑐𝑜𝑛𝑣𝑜𝑙𝑢𝑡𝑒𝑑 = √(𝐽𝑅𝑀𝑆 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − (𝐽𝑅𝑀𝑆 𝑠𝑒𝑡𝑢𝑝 𝑤/𝑜 𝐷𝑈𝑇 ) = √(𝐽𝑅𝑀𝑆 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − 350 𝑓𝑠 2
5Other gender configurations are available on request.

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Typical S-Parameters, Group Delay and Phase Response

Aperture of group delay measurement: 160 MHz

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Typical Noise Figure
The measurement had been performed using a FSW85 Spectrum Analyzer by Rhode & Schwarz. The
noise figure defines the degradation of the signal-to-noise ratio when the signal passes the amplifier. An
ideal amplifier would amplify the noise at its input along with the signal. However, a real amplifier adds
some extra noise from its own components and degrades the signal-to-noise ratio. Please note that thisapplies to small signals only. When the amplifier is used close to or in its saturation region additional
non-linear effects will impact the signal-to-noise ratio and the signal waveform.

1098

Noise Figure [dB]76543210051015

20

2530

3540

Frequency [GHz]SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Typical Binary Waveforms
Eye Amplitudes: Input ~110 mV ⇒ Output ~3.8 V
Measurements at 32 and 44 Gbps had been performed using a SHF 40 A BPG and an Agilent 86100C
DCA with Precision Time Base Module (86107A) and 70 GHz Sampling Head (86118A).
This measurements will not be part of the inspection report delivered with each particular device.

Input Signal @ 32 Gbps

Output Signal @ 32 Gbps

Input Signal @ 44 Gbps

Output Signal @ 44 Gbps

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Typical Binary Waveforms
Eye Amplitudes: Input ~220 mV ⇒ Output ~6.4 V
Measurements at 32 and 44 Gbps had been performed using a SHF 40 A BPG and an Agilent 86100C
DCA with Precision Time Base Module (86107A) and 70 GHz Sampling Head (86118A).
This measurements will be part of the inspection report delivered with each particular device.

Input Signal @ 32 Gbps

Output Signal @ 32 Gbps

Input Signal @ 44 Gbps

Output Signal @ 44 Gbps

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Typical 4-Level Waveforms
Eye Amplitudes: Input ~150 mV ⇒ Output ~5 V
Measurements at 32 GBaud had been performed using a SHF 611 C DAC and an Agilent 86100C DCA
with Precision Time Base Module (86107A) and 70 GHz Sampling Head (86118A).
Faster input signals had been taken from a SHF 613 A DAC.
This measurements will not be part of the inspection report delivered with each particular device.

Input Signal @ 32 GBaudOutput Signal @ 32 GBaud, ~5 Vpp

Input Signal @ 45 GBaud

Output Signal @ 45 GBaud, ~4.5 Vpp

Input Signal @ 50 GBaud

Output Signal @ 50 GBaud, ~4.5 Vpp

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Handling Instructions
To operate the amplifier a positive supply voltage of approximately +9 V must be applied.
The gain can be adjusted by applying a voltage of 0 to -5 V to the gain control pin. If this pin is left open, theamplifier will have maximum gain. By reducing the gain the crossing will shift. Typical characteristics areshown in the following diagram for an input voltage of 0.2 Vpp with 50% crossing.

0-2-4

Gain [dB]-6

Crossing
shift [%]

-8-10
0-1-2-3-4-5

Gain Control Voltage [V]Crossing [%]The crossing can be adjusted by applying a voltage of -5 to +5 V to the crossing control pin. If this pin is left
open a crossing of approximately 50 % is achieved. The range depends on the input voltage level. Typicalcharacteristics are shown in the following diagram for input voltages of 0.11 and 0.22 Vpp with 50% crossing.

60585654525048464442400.11 V0.22 V-505Crossing Control Voltage [V]SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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Typical Low Frequency Response (<40 MHz)

Typical Saturation power

Top (red): 3 dB compression;
Middle (green): 2 dB compression;
Bottom (blue): 1 dB compression

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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4.935
12.37

4.9

16.5

4251

40

Right view

12.9
16.35
18.7
23.5

7P03dB : 21 dBm

+9V
0.7A
Gain
0 ... -5V

29 dBnc

Communication
SHF Technologies
AGGermany

40kHz - 40GHz

42123

Crossing-5V...+5V

SHF L806 A

Top view

79
12.35

16.35
18.7
23.5

Left view4216.5

Mechanical Drawing with Heat Sink

All dimensions in mm

59.1

143.6
136.9

18.8
37.5

Bottom view

M4 (2x)Pin assignment might change if a bias tee option is chosen.
Thermal resistance of heat sink approx. 4 K/W
For permanent mounting remove the heat sink from the amplifier. In that case please ensure that
adequate cooling of the amplifier is guaranteed. It is recommended to use thermal paste or a thermal
gap pad for the mounting. In order to separate the heat sink from the amplifier, remove the four screws
on the heat sink. Please note, thermal paste is used between the heat sink and the amplifier housing.
SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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4.9

35

+9V0.7A4.8
7.15

4.9

16.5

42

10.6
13.5

Right view

712.37

Gain
0 ... -5V

P03dB : 21 dBm

Communication
SHF Technologies
AGGermany

29 dB

40kHz - 40GHz

42123

ncCrossing-5V...+5VTop view

SHF L806 A

7912.35

Left view

13.5

42

16.5

Mechanical Drawing without Heat Sink

3151
48

332

Bottom view

M2.5x5 (4x)All dimensions in mm

Pin assignment might change if a bias tee option is chosen.
Please ensure that adequate cooling of the amplifier is guaranteed.

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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User Instructions
ATTENTION!
Electrostatic sensitive GaAs FET amplifier1.

To prevent damage through static charge build up, cables should be always discharged before
connecting them to the amplifier!

2.

Attach a 50 Ohm output load before supplying DC power to the amplifier!

3.

The supply voltage can be taken from any regular 9 V, 0.7 A DC power supply and can be connectedto the supply feed-through filter via an ON / OFF switch.

4.

Using a 3 dB or 6 dB input attenuator will result in a 6 dB or 12 dB increase of the input return loss.
For minimal degradation of amplifier rise time, these attenuators should have a bandwidth
specification of greater 50 GHz (V/ 1.85mm attenuators)!

5.

A input signal of about 0.3 Vpp will produce output swing of about 7 Vpp.

6.

Higher input voltages will drive the amplifier’s output stage into saturation, leading to waveform peakclipping.

7.

Saturated output voltages can only be used without damage while the amplifier is connected to a 50Ohm precision load with a VSWR of less than 1.2 or better than 20 dB return loss up to 40 GHz.

8.

While using a reflective load the output voltage has to be reduced to a safe operating level according
to the magnitudes of the reflections.

9.

ATTENTION: At radio frequencies a capacitive load can be transformed to an inductive one throughtransmission lines! With an output stage driven into saturation this may lead to the immediate
destruction of the amplifier (within a few ps)!

10.

The input voltage should never be greater than 0.6 Vpp equivalent to 0 dBm input power.

SHF reserves the right to change specifications and design without notice - SHF L806 A - V002 - May 22, 2017

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