SHF Communication Technologies AGWilhelm-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.de

Preliminary Datasheet
SHF 611 B32 GBaud 3-Bit DAC

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 1/9

Description
The SHF 611 B is a 3-Bit Digital-to-Analog Converter (DAC) operating at data rates up to32 GBaud for use in broadband test setups and telecom transmission systems. Three 32 Gbpssingle ended serial data streams are accepted by the DAC and converted into one differential 8Level data signal at a nominal output data rate of 32 GBaud. By using only two input ports it ispossible to convert two single ended input data serial data streams into a 4-Level output signal. A
single ended clock signal (nominally 32 GHz) with the same frequency as the output data rate
drives the SHF 611 B.
For data regeneration purposes all input data signals are re-timed by the clock signal. All RF inputand output ports are AC-coupled. Unused in- and output ports should be terminated.

Features






Broadband operation up to 32 GBaud
Differential data output, 750 mV single ended output swing
Single ended clock and data inputs
Latched input ports
Output level control
Bias boardApplications


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®

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 B - V002 – November 28, 2012 Page 2/9

Bias BoxAt delivery, the bias box SHF 88120 A is mounted on a common base plate, together with the SHF
611 B 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 board. 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 B + Bias Box”-Assembly

SHF 600 Series Control - Software
At delivery, the software package including a 1.5m USB cable will be provided.

Fig. 2: “SHF 600 Series Control” – GUISHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 3/9

Specifications
Parameter

Unit

SymbolMin.

Typ.

Max.

Data Input VoltagemVVdata in300500

1000

Clock Input FrequencyGHzfin

1

Clock Input VoltagemVpp

Vclk in300

Minimum Output Data Rate

GBaud

Rin,minMaximum Output Data Rate

GBaudRin,max

32mV

Vout

650

770

900

+11.75+12+12.25
250

CommentInput Parameters
Clock input
amplitude = 500mV

32
500

1000

Data input
amplitude = 500mV

Output Parameters

Output Amplitude

1

Single ended, full scale,adjustable up to -6dB,
see table on page 5Power Requirements (incl. Bias Box)
Supply Voltage

VVee

Supply Current

mAIee

220

Power Dissipation

WPd

2.7

Power Requirements (DAC-Module only)
Supply VoltageVVee

Supply CurrentmA

Power Dissipation-5.2-5-4.8

Iee350380W

Pd

1.8

Bias Adjust 1 for D0, D1 & D2

VVBias1-3.30

Bias Adjust 2 for D0, D1 & D2

VVBias2

-3.3

0°C

Tcase

@ VEE = -5V

Bias Voltages

Conditions
Case Temperature45

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 4/9

Typical Output Amplitude Values & Spread
Input D2

Input D1

Input D0

Minimum Output
Amplitude [mV]Maximum Output
Amplitude [mV]

--

On

103

115

-

On-

217

243-

On

On

320

360

On-

-433

485

On-

On

525

590

On

On-

615

690

OnOn

On

720

820

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 5/9

Typical Output Eye Diagrams
The measurements below had been performed using a SHF 12103 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.

8-Level Output Signal Measurement

Out @ 32 GBaud

Out! @ 32 GBaud

Out @ 20 GBaud

Out! @ 20 GBaud

Out @ 10 GBaud

Out! @ 10 GBaud

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 6/9

4-Level Output Signal Measurement

Out @ 32 GBaud

Out! @ 32 GBaud

Out @ 20 GBaud

Out! @ 20 GBaud

Out @ 10 GBaud

Out! @ 10 GBaud

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 7/9Outline Drawing - Modulebcdeghij4,69,1

14,89,79,1af

3,85,08
4x 5,08

GND

109,19,12

112,34x Ø2,7OUT

D2(MSB)6OUT

D13

SHF 611 B

D0(LSB)

5Clk

4

XXXXX
SHF AG Berlin

Bias1 Bias1
D0
D14,63

Bias2
D0

Bias1
D2

Bias2 Bias2
D2
D1-5V

2834
40

19,59,5Port
Designation

abc

d9,5e

Bias 1 Bias 1 Bias 1
DO
D1
D2fg1

23456Designation

OutOut

D1Clk

D0

D2(LSB)(MSB)

1.85mm (V) Female

hBias 2 Bias 2 Bias 2DO
D1
D2PortConnector

1929383529193-Bit DACij-5V

2.92mm (K) Female

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 8/9

Outline Drawing – “Module + Bias Box”- AssemblyUSB

12V DC

15.1

15.1
Module4x Ø3.4

OUT

D2(MSB)OUT

D1

SHF 611 B
3-Bit DAC

D0(LSB)Clk

XXXXX
SHF AG Berlin

Bias1 Bias1
D0D1Bias1
D2Bias2 Bias2
D2
D1-5V

SHF

Communication
Technologies AG

SHF 88120 A9282108102

8292

113.4

Bias2
D0

Bias BoxXXXXXUSB

12V DC

4046

Baseplate

3.6
647
1025.6
32.7

15.1

Bias Box

SHF reserves the right to change specifications and design without notice – SHF 611 B - V002 – November 28, 2012 Page 9/9