SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772051-0 • Fax +49 30 7531078
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 611 D32 GBaud 3-Bit DAC

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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Description
The SHF 611 D a 3-Bit Digital-to-Analog Converter (DAC) operating at data rates up to 32 GBaud
for use in broadband test setups and telecom transmission systems. Three 32 Gbps single ended
serial data streams are accepted by the DAC and converted into one differential 8-Level data
signal at a nominal output data rate of 32 GBaud. By using only two input ports it is possible toconvert two single ended input data serial data streams into a 4-Level output signal. A single
ended clock signal with the same frequency as the output data rate drives the SHF 611 D.
For data regeneration purposes all input data signals are re-timed by the clock signal. All RF input
and output ports are AC-coupled.

FeaturesBroadband operation up to 32 GBaud
Differential data output, 800 mV single ended output swing
Single ended clock and data inputs
Latched input ports
Output level control
Bias BoxApplications


100G Ethernet development and prototyping
200G and 400G systems
OC-768 / STM-256 applications
Telecom transmission

Fibre Channel
Broadband test and measurement equipment®

Block Diagram
OutOutSHF
611 D

D1

D2(MSB)

3-Bit DACClk

D0(LSB)
Bias 1/2 (D0...D2) Vee6

BiasBoxUSB

®

+12V

Fibre Channel is a registered trademark of the Fibre Channel Industry Association

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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Bias BoxAt delivery, the Bias Box SHF 88120 B is mounted on a common base plate, together with theSHF 611 D 3-Bit DAC (Fig.1). All bias voltages are provided by this Bias Box which is controlled
by a PC via a USB interface. The easy to use software package is a complementary part of eachdelivery. For system applications it is possible to remove the Bias Box. In that case the operating
voltages have to be supplied by the customer’s circuitry.
The Bias Box can only be used with the delivered power supply. Using other power supplies candamage the Bias Box.

Fig. 1: “SHF 611 D + Bias Box”-Assembly

SHF 600 Series Control - Software
At delivery, the software package for a MS Windows installation including a 1.5m USB cable will
be provided. Control software for other operating systems is available on request.

Fig. 2: “SHF 600 Series Control” – GUISHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

Page 3/9Specifications
Parameter

Unit

Symbol

Min.

Typ.

Max.

Data Input Voltage

mVVdata in

300

5001000

Clock Input Frequency

GHzfinClock Input VoltagemVpp

Vclk in

300

VVDCin-10

Minimum Output Data Rate

GBaud

Rin,minMaximum Output Data Rate

GBaud

Rin,max32

Output Amplitude

mVVout110

External DC Voltage on
RF Output PortVVDCout-10+11.75

Comment

Input Parameters

External DC Voltage on
RF Input Port

Clock input
amplitude = 500mV
Equates to theoutput data rate

5001000

Data input
amplitude = 500mV+10AC coupled input

Output Parameters138
870

Single ended,adjustable up to -6dB,
see table on page 50+10

AC coupled output+12+12.25
250Power Requirements (incl. Bias Box)
Supply Voltage

VVee

Supply Current

mA

Iee

220

Power Dissipation

WPd

2.7

Power Requirements (DAC-Module only)
Supply Voltage

VVee

Supply Current

mA

Power Dissipation-5.2-5-4.8

Iee

350

380

W

Pd

1.8

Bias Adjust 1 for D0, D1 & D2

V

VBias1-3.3

0Bias Adjust 2 for D0, D1 & D2

VVBias2-3.30°C

Tcase

1045

@ VEE = -5V

Bias VoltagesConditions
Case Temperature1

1

Tr / Tf of the output data signal can be slightly decreased by applying additional cooling measures like heat sinks or coolingfans.
SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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Output Amplitudes
Output amplitudes shown below are adjustable up to -6 dB via “SHF 600 Series Control” - software.

Input D2

Input D1

Input D0

Minimum Output
Amplitude [mV]

Typical Output
Amplitude [mV]Maximum Output
Amplitude [mV]--On100120140-

On-

200

240

270-

On

On

300

360

400

On--

450

500

550

On-

On

550

620

700

On

On-

650

720

800

OnOn

On

750

820

900

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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Typical Output Eye Diagrams
The measurements below had been performed using a SHF 12104 A Bit Pattern Generator (PRBS312 -1) and an Agilent 86100D Digital Communication Analyzer (DCA) with Precision Time Base
Module (86107A) and 70 GHz Sampling Head (86118A). The outputs of the DAC module had beenconnected directly to the DCA input.

4-Level Output Signal Measurement

Out @ 32 GBaud

Out! @ 32 GBaud

Out @ 28 GBaud

Out! @ 28 GBaud

Out @ 20 GBaud

Out! @ 20 GBaud

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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8-Level Output Signal Measurement

Out @ 32 GBaud

Out! @ 32 GBaud

Out @ 28 GBaud

Out! @ 28 GBaud

Out @ 20 GBaud

Out! @ 20 GBaud

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

Page 7/94.6123456789109.1

14.8
9.7
9.1

Outline Drawing - Module

3.8
5.08
4x 5,08

GND

109.1
12.3

4x Ø2.7
OutOutD2

D1(MSB)SHF 611 D
D048453929(LSB)

3-Bit DAC

19Bias2
D2-5V

4.6

3

Bias1
D2Bias2 Bias2
D0
D1Clk

3

Bias1 Bias1
D0
D13900000
SHF AG Berlin

Pin283440

Designation

1

Bias 1 D1

2Bias 1 D0

19.5

3nc

4

Bias 1 D2PortConnector

5nc

Out

1.85mm (V) female

6Bias 2 D1Out

1.85mm (V) female

7Bias 2 D0

D02.92mm (K) female

8nc

D1

2.92mm (K) female

9Bias 2 D2

D22.92mm (K) female

10-5V

Clk

2.92mm (K) female

9.59.5All dimensions in mm

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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Outline Drawing – “Module + Bias Box”- AssemblyUSB

12V DC

Module15.1

4x Ø3.4

Out15.1

Out

D2

D1(MSB)SHF 611 D
D03-Bit DAC(LSB)

00000

Bias1
D2
Bias2
D2-5V118115

Bias2
D0Clk

Communication
Technologies AG10292Bias1 Bias1
D1D0
Bias2
D1SHF

82102123.4

SHF AG Berlin

SHF 88120 B
Bias BoxXXXXXUSB

312V DC

4046Baseplate

3.6
625.6
32.7

Bias Box

15.1

4710All dimensions in mm

SHF reserves the right to change specifications and design without notice - SHF 611 D - V002 – April 25, 2015

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