Rainbow Electronics MAX12005 User Manual

19-5554; Rev 0; 9/10

EVALUATION KIT

AVAILABLE

General Description

The MAX12005 satellite IF switch IC is designed for
multi-user applications supporting two quad universal
low-noise blocks (LNBs) to be matrix switched to four
satellite receivers. The system can be easily expanded
to accept 16 satellite IF inputs using the cascade option
and one additional satellite IF switch IC. A configuration
of eight satellite IF inputs to eight satellite receivers is
also possible by using two ICs and adding eight input
splitters. The insertion loss of these splitters can be com­pensated by a +6dB or +12dB input gain select.

There are two ways to control the switch function.
Each IC contains four DiSEqCK 2.0 decoders and four
alternate tone/voltage decoders. The decoders use an
integrated trimmed oscillator, simplifying the MAX12005
implementation into any system. There are four opera­tional modes, which include LNB mode (for use within
the LNB), cascade master mode, cascade slave mode,
and single mode.

The satellite IF switch is designed on an advanced SiGe
process and is available in a lead-free 48-pin TQFN
surface-mount package (7mm x 7mm).

Satellite IF Switch

MAX12005

Features

S 8-Input-to-4-Output Matrix Switch

S Expandable to 16 Inputs with Cascade Master/

Slave Option

S 950MHz to 2150MHz Operation

S Greater than 30dB Switch Isolation

S 0/+6/+12dB Input Stage Gain Selection to

Compensate for Splitter Insertion Loss
Gain Step for All Input Stages Is Commonly
Controlled Through an Analog Select Pin

S Four Integrated DiSEqC 2.0 Decoders with

Integrated Oscillator

S Alternate Tone/Voltage Detection

S ESD Protected to 2kV HBM

Applications

Direct Broadcast Satellite Receivers

Satellite IF Distribution

L-Band Distribution

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX12005ETM+ -40NC to +85NC 48 TQFN-EP*

+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.

DiSEqC is a trademark of EUTELSAT.

_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

Satellite IF Switch

ABSOLUTE MAXIMUM RATINGS

VCC to GND ..........................................................-0.3V to +3.6V

RFIN1–RFIN8 to GND ...........................................-0.3V to +1.5V

CASCADE_IN1–CASCADE_IN4 to GND .............. -0.3V to +1.5V

RFOUT1–RFOUT4 to GND ....................... -0.3V to (V

DISEQC_TX1–DISEQC_TX4 to GND .........-0.3V to (V

DISEQC_RX1–DISEQC_RX4 to GND ........-0.3V to (V

+ 0.3V)

CC
CC
CC

+ 0.3V)
+ 0.3V)

GAIN_SELECT, MODE_SELECT

to GND ...................................................-0.3V to (V

MAX12005

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.

CAUTION! ESD SENSITIVE DEVICE

CC

+ 0.3V)

Continuous Power Dissipation (T

TQFN (derate 27.8 mW/NC above +70NC) ..................2.2W

Operating Ambient Temperature Range ........... -40NC to +85NC

Maximum Junction Temperature .....................................+150NC

Storage Temperature Range ............................ -65NC to +150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

DC ELECTRICAL CHARACTERISTICS

(VCC = +3.0V to +3.5V, T
output loads = 75I. Typical values are at +3.3V and at T

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I

+12dB GAIN_SELECT Input High­Level Voltage

+6dB GAIN_SELECT Input Voltage
Level and Range

0dB GAIN_SELECT Input Low-Level
Voltage

Single MODE_SELECT Input High­Level Voltage

Master MODE_SELECT Input Voltage
Level and Range

Slave MODE_SELECT Input Voltage
Level and Range

LNB MODE_SELECT Input Low-Level
Voltage

GAIN_SELECT and MODE_SELECT
Input Current

DC Voltage Detect Input High Level V
DC Voltage Detect Input Low Level V
DISEQC_RX_ Input Current I

DISEQC_TX_ Output High-Level
Voltage

DISEQC_TX_ Output Low-Level
Voltage

= -40NC to +85NC, mode set to master, input gain stages set to highest gain, inputs matched to 75I,

A

CC

CC

V

IH

V

IN

V

IL

V

IH

V

IN

V

IN

V

IL

I

IN

IH

IL

IN

V

OH

V

OL

= +25NC, unless otherwise noted.) (Note 1)

A

3.0 3.5 V

VCC = 3.3V, 0dB, one input selected, four
outputs selected

VIN = V

CC

(Note 2) 1.23 V
(Note 2) 1.11 V
VIN = high or low 1

I

= -1mA

LOAD

I

= +1mA 0.4 V

LOAD

= +70NC)

A

VCC -

0.4V

1/2 V

CC

Q200mV

VCC -

0.4V

2/3 V

CC

Q200mV

1/3 V

CC

Q200mV

150 250 mA

0.4 V

0.4 V

10

-

V

CC

0.4V

V

mV

V

mV

mV

FA

FA

V

2

Satellite IF Switch

AC ELECTRICAL CHARACTERISTICS

(MAX12005 EV Kit, VCC = +3.0V to +3.5V, f
set to 0dB, RF inputs matched to 75I, RF output loads = 75I. Typical values are at +3.3V and at T
noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operation Frequency f
DISEQC_RX_ Tone Input Level V

Switch Gain at 950MHz (Note 3)

Cascade Input Switch Gain at
950MHz

Switch-to-Switch Gain Match D|S
Gain Slope with Frequency Between 950MHz and 2150MHz +3 dB

Single-Input Source Gain Change

3rd-Order Intermodulation Product
(Case 1)

= 950MHz, VIN = 70dBFV, T

IN

RF

fIN = 22kHz 60 mV

IN

0dB gain 0

+12dB gain +12

|S

21|

| At 950MHz (Note 4) -1.5 +3.5 dB

21

Gain change from single output con­nected to a single input to four outputs
connected to a single input

Output level set to +89dBFV by varying

IM3

three equal amplitude tones at 955MHz,
962MHz, and 965MHz; measure products
at 952MHz and 958MHz

= -40NC to +85NC, mode set to master, input gain stages

A

= +25NC, unless otherwise

A

950 2150 MHz

0 dB

-0.4 dB

-35 dBc

MAX12005

P-P

dB+6dB gain +6

Output level set to +89dBFV by varying
3rd-Order Intermodulation Product
(Case 2)

RFIN1–RFIN8 Input Return Loss |S

CASCADE_IN1–CASCADE_IN4 Input
Return Loss

RFOUT1–RFOUT4 Output Return Loss |S
Switch Isolation 55 dB
Port-to-Port Isolation 33 dB
DiSEqC Clock f

Note 1: Production tested at +25NC; guaranteed by design and characterization at -40NC and +85NC.
Note 2: To supply the specified input-voltage-detect levels requires the use of a voltage-divider comprised of 12.7kI and 1.02kI

Q0.5% tolerance resistors. The voltage being divided is expected to be V

Note 3: The common input gain step is set by analog control. All gain measurements have only one output connect to each input.

Switch gain measurements do not include cascade inputs as part of the switch signal path.

Note 4: Switch-to-switch gain match is defined as each switch to every other switch gain match. Each switch must be set up with

the same input gain step.

IM3

|S

OSC

three equal amplitude tones at 2135MHz,

2142MHz, and 2145MHz; measure prod-

ucts at 2132MHz and 2138MHz

| -12 dB

11

| -12 dB

11

| -12 dB

22

= 14.75V maximum and VOH = 16.75V minumum.

OL

-34 dBc

8 MHz

3

Satellite IF Switch

Typical Operating Characteristics

(MAX12005 EV Kit, VCC = +3.0V to +3.5V, fIN = 950MHz, VIN = 70dBFV, TA = -40NC to +85NC, mode set to master, input gain stages
set to 0dB, RF inputs matched to 75I, RF output loads = 75I. Typical values are at +3.3V and at T
Production tested at +25NC; guaranteed by design and characterization at -40NC and +85NC.)

VOLTAGE vs. CURRENT (0dB GAIN)

200

MAX12005

180

160

CURRENT (mA)

140

120

2.9 3.6

TA = +85°C

TA = +25°C

TA = -40°C

VOLTAGE (V)

S21 +85°C (0dB GAIN, VAR. IN/OUT)

4

3

2

1

0

-1

MAGNITUDE (dB)

-2

-3

-4

MAX12005 toc01

-1

GAIN (dB)

-2

-3

-4

3.53.43.33.23.13.0

MAX12005 toc04

-1

MAGNITUDE (dB)

-2

-3

-4

VOLTAGE vs. GAIN (+25°C)

2

1

0

2.9 3.6

2150MHz

VOLTAGE (V)

1550MHz

950MHz

3.53.43.33.23.13.0

S21 -40°C (0dB GAIN, VAR. IN/OUT)

4

3

2

1

0

MAX12005 toc02

MAX12005 toc05

= +25NC, unless otherwise noted.

A

S21 +25°C (0dB GAIN, VAR. IN/OUT)

4

3

2

1

0

-1

MAGNITUDE (dB)

-2

-3

-4

9.5E+08

1.15E+09
FREQUENCY (Hz)

1.35E+09

1.55E+09

RF S11 (VAR. INPUT)

-5

-10

-15

-20

-25

-30

MAGNITUDE (dB)

-35

-40

-45

-50

1.75E+09

1.95E+09

MAX12005 toc03

2.15E+09

MAX12005 toc06

-5

-10

-15

-20

-25

-30

MAGNITUDE (dB)

-35

-40

-45

-50

4

9.5E+08

1.15E+09
FREQUENCY (Hz)

1.35E+09

RF S22 (VAR. OUTPUT)

9.5E+08

1.15E+09
FREQUENCY (Hz)

1.35E+09

1.55E+09

1.55E+09

1.75E+09

1.75E+09

1.95E+09

1.95E+09

2.15E+09

MAX12005 toc07

2.15E+09

9.5E+08

-10

-20

-30

-40

-50

ISOLATION (dB)

-60

-70

-80

-90

9.5E+08

1.15E+09
FREQUENCY (Hz)

1.35E+09

1.55E+09

1.75E+09

SWITCH ISOLATION (VAR. CH)

1.15E+09
FREQUENCY (Hz)

1.35E+09

1.55E+09

1.75E+09

1.95E+09

1.95E+09

2.15E+09

MAX12005 toc08

2.15E+09

9.5E+08

1.15E+09
FREQUENCY (Hz)

1.35E+09

1.55E+09

PORT-TO-PORT ISOLATION (VAR. PORTS)

-30

-35

-40

-45

-50

-55

ISOLATION

-60

-65

-70

-75

-80

9.5E+08

1.15E+09

1.35E+09

1.55E+09

FREQUENCY (Hz)

1.75E+09

1.75E+09

1.95E+09

1.95E+09

2.15E+09

MAX12005 toc09

2.15E+09

Satellite IF Switch

Pin Configuration

MAX12005

TOP VIEW

RFOUT3

GND

V

RFOUT2

GND

V

RFOUT1

GND

V

V

MODE_SELECT

GAIN_SELECT

CC

CC

CC

CC

CC

GND

V

35

34 33 32 31 30 29 28 27

36

37

38

39

40

41

42

43

44

45

46

+

47

48

2

3 4 5 6 7 8 9 10

1

GND

RFIN2

RFIN1

VCCRFOUT4

GND

DISEQC_TX1

DISEQC_RX1

MAX12005

GND

RFIN3

DISEQC_TX2

DISEQC_RX2

GND

RFIN4

DISEQC_RX3

RFIN5

DISEQC_RX4

DISEQC_TX3

25

26

12

11

GND

RFIN6

DISEQC_TX4

GND

24

CASCADE_IN4

23

22

GND

21

CASCADE_IN3

GND

20

CASCADE_IN2

19

18

GND

17

CASCADE_IN1

16

GND

RFIN8

15

GND

14

13

RFIN7

GND

TQFN

Pin Description

PIN NAME FUNCTION

1 RFIN1 RF Input from LNB

2, 4, 6, 8, 10, 12,

14, 16, 18, 20,
22, 24, 35, 38,

GND Electrical Ground

41, 44

3 RFIN2 RF Input from LNB
5 RFIN3 RF Input from LNB
7 RFIN4 RF Input from LNB

9 RFIN5 RF Input from LNB
11 RFIN6 RF Input from LNB
13 RFIN7 RF Input from LNB
15 RFIN8 RF Input from LNB
17 CASCADE_IN1 Cascade Input from RF Output of Second MAX12005 in Slave Mode
19 CASCADE_IN2 Cascade Input from RF Output of Second MAX12005 in Slave Mode
21 CASCADE_IN3 Cascade Input from RF Output of Second MAX12005 in Slave Mode
23 CASCADE_IN4 Cascade Input from RF Output of Second MAX12005 in Slave Mode

5

Satellite IF Switch

Pin Description (continued)

PIN NAME FUNCTION

25 DISEQC_TX4

26 DISEQC_RX4 Input for DiSEqC Slave Signal from Satellite Receiver or Master

27 DISEQC _TX3

MAX12005

28 DISEQC _RX3 Input for DiSEqC Slave Signal from Satellite Receiver or Master

29 DISEQC _TX2

30 DISEQC _RX2 Input for DiSEqC Slave Signal from Satellite Receiver or Master

31 DISEQC _TX1

32 DISEQC _RX1 Input for DiSEqC Slave Signal from Satellite Receiver or Master

33, 36, 39, 42,

45, 46

34 RFOUT4 RF Output to Satellite Receiver
37 RFOUT3 RF Output to Satellite Receiver
40 RFOUT2 RF Output to Satellite Receiver
43 RFOUT1 RF Output to Satellite Receiver
47 MODE_SELECT Satellite Switch Mode Select
48 GAIN_SELECT Gain Select for All Input Stages

— EP

V

CC

Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller

Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller

Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller

Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller

3.0V to 3.5V Supply. Analog supply pins 33, 36, 39, and 42. Digital supply pins 45 and

46.

Exposed Pad Ground. The exposed pad must be soldered to the circuit board for prop­er thermal and electrical performance.

6

Satellite IF Switch

Functional Diagram

33, 36, 39, 42, 45

V

0/+6/+12dB

RFIN1

1

3

RFIN2

RFIN3

5

9:1 MUX

SATELLITE IF SWITCH

9:1 MUX

CC

43

RFOUT1

40

RFOUT2

MAX12005

RFOUT4

V

37

34

46

CC

47

48

16
GND

7

RFIN4

RFIN5

9

RFIN6

11

13

RFIN7

15

RFIN8

CASCADE_IN1

CASCADE_IN2

9:1 MUX

9:1 MUX

CASCADE_IN3

CASCADE_IN4

MAX12005

PORT SWITCH CONTROL

DETECTOR

DiSEqC 2.0

VOLTAGE/ TONE

DISEQC_TX1

DISEQC_RX1

3117 19 21 23 32 29 30 27 28

DISEQC_TX2

DiSEqC 2.0

DISEQC_RX2

DETECTOR

DiSEqC 2.0

VOLTAGE/ TONE

DISEQC_TX3

CONTROL

DETECTOR

VOLTAGE/ TONE

DISEQC_RX3

LOGIC

DiSEqC 2.0

DISEQC_TX4

25 26

DETECTOR

VOLTAGE/ TONE

FREQUENCY

DISEQC_RX4

2, 4, 6, 8, 10, 12, 14, 18,

20, 22, 24, 35, 38, 41, 44

RFOUT3

MODE_SELECT

GAIN_SELECT

8MHz

OSCILLATOR

OUT

GND

7

Satellite IF Switch

The MAX12005 satellite IF switch features eight 75I
inputs with three selectable gain steps of 0, +6dB, and
+12dB. Each of the eight input amplifiers feeds into four
nine-to-one multiplexers with the switching controlled
by voltage/tone or DiSEqC signaling from up to four
receivers. The output of each multiplexer is then sent to
a satellite receiver through a 75I buffered output stage.

The satellite IF switch has four modes of operation. Two

MAX12005

modes are used to increase the number of IF inputs by
cascading two MAX12005 ICs together. The first IC is
set to master mode to enable the four cascade inputs.
The second IC is set to slave mode with its outputs
connected to the cascade inputs of the master IC.

The LNB mode sets up the IC to recognize LNB DiSEqC
signaling to control switching and ignore DiSEqC
signaling for multiswitch applications. The single mode
sets up the IC to recognize multiswitch DiSEqC signaling
to control switching and ignore LNB DiSEqC signaling.
For the LNB, single, and slave modes, the four cascade
inputs are disabled.

Detailed Description

Input Gain Select

The voltage supplied to the GAIN_SELECT pin provides
the selection for one of three gain settings available at all
eight input stages, as follows:

GND = 0dB

1/2 VCC = +6dB

V

The +6dB gain step voltage can be set through the
use of a simple supply voltage-divider. This gain select
feature is intended to compensate for input signal losses
due to the use of input RF signal splitters.

= +12dB

CC

Chip Mode Select

The voltage supplied to the MODE_SELECT pin provides
the selection for one of four IC operational modes, as
follows:

GND = LNB Mode

1/3 V

2/3 V

V

The slave mode and master mode voltages can be set
through the use of simple supply voltage-dividers.

= Slave Mode (Cascade Operation)

CC

= Master Mode (Cascade Operation)

CC

= Single Mode

CC

Switch Control

Voltage/tone signaling is the default switch control after
power-up or when a receiver is connected or recon­nected with the die power on. After an individual decoder
receives a DiSEqC signal, that decoder switches from
voltage/one control to DiSEqC control until a new receiver
connection is made or when the IC has a power-on reset.

Layout Considerations

To minimize coupling between different sections of the
IC, a star power-supply routing configuration with a large
decoupling capacitor at a central V
mended. The V
each going to a separate V
a bypass capacitor as close as possible to each sup­ply pin. This arrangement provides local decoupling at
each V
for a low-inductance ground connection. Do not share
the capacitor ground vias with any other branch. The
MAX12005 EV kit can be used as a starting point for
layout. For best performance, take into consideration
grounding and routing of RF, baseband, and power­supply PCB proper line. Make connections from vias
to the ground plane as short as possible. On the high­impedance ports, keep traces short to minimize shunt
capacitance. EV kit schematic and Gerber files can be
found at www.maxim-ic.com.

pin. Use at least one via per bypass capacitor

CC

traces branch out from this node,

CC

node in the circuit. Place

CC

node is recom-

CC

SPI is a trademark of Motorola, Inc.

8

Satellite IF Switch

DiSEqC Slave Control Interface

The DiSEqC interface is designed according to the
DiSEqC Bus Functional Specification version 4.2. All
framing bytes 0xE0 through 0xE7 are supported. The
following address bytes are supported:

PRIMARY DEVICE

TO SAT RECEIVER 1

TO SAT RECEIVER 2

TO SAT RECEIVER 3

TO SAT RECEIVER 4

RFOUT1

RFOUT2

RFOUT3

RFOUT4

CASCADE3

CASCADE4

CASCADE1

CASCADE2

0x00 Any device

0x10 Any LNB, switcher, or SMATV

0x11 LNB

0x14 Switcher, DC-blocking

RFIN1

RFIN2

RFIN3

RFIN4

RFIN5

RFIN6

RFIN7

RFIN8

SAT A, LOW, VERTICAL

SAT A, LOW, HORIZONTAL

SAT A, HIGH, VERTICAL

SAT A, HIGH, HORIZONTAL

SAT B, LOW, VERTICAL

SAT B, LOW, HORIZONTAL

SAT B, HIGH, VERTICAL

SAT B, HIGH, HORIZONTAL

MAX12005

SECONDARY DEVICE

RFOUT1

RFOUT2

RFOUT3

RFOUT4

CASCADE3

CASCADE4

Figure 1. Typical Cascade Connection Between Two Satellite Switch ICs

CASCADE1

CASCADE2

RFIN1

RFIN2

RFIN3

RFIN4

RFIN5

RFIN6

RFIN7

RFIN8

SAT C, LOW, VERTICAL

SAT C, LOW, HORIZONTAL

SAT C, HIGH, VERTICAL

SAT C, HIGH, HORIZONTAL

SAT D, LOW, VERTICAL

SAT D, LOW, HORIZONTAL

SAT D, HIGH, VERTICAL

SAT D, HIGH, HORIZONTAL

9

Satellite IF Switch

Table 1 shows the coherence between the terms used
by the DiSEqC standard and the pin names used by the
MAX12005 along with the command sequences used to
control switching.

Table 2 lists the supported command bytes. The com­mand byte is the 3.byte in the DiSEqC master frame
(refer to the DiSEqC Bus Functional Specification ver­sion 4.2, top of page 13). The DiSEqC slave only sends

MAX12005

Table 1. DiSEqC Slave Control Interface

DEVICE
(Note 1)

Primary RFIN1 Satellite A, low band, vertical polarization 0x23, 0x22, 0x20, 0x21

Secondary RFIN1 Satellite C, low band, vertical polarization 0x27, 0x22, 0x20, 0x21

Note 1: The primary device outputs connect directly to the satellite receivers. The secondary device outputs connect to the primary

device through the cascade inputs. Also see Figure 1.

Note 2: Only those DiSEqC commands that differ between sequences have to be sent to change the input, not all four commands.

By default RFIN1 from the primary device is selected.

The DiSEqC interface is designed according to the DiSEqC Bus Functional Specification version 4.2.

INPUT SIGNAL FROM

RFIN2 Satellite A, low band, horizontal polarization 0x23, 0x22, 0x20, 0x25
RFIN3 Satellite A, high band, vertical polarization 0x23, 0x22, 0x24, 0x21
RFIN4 Satellite A, high band, horizontal polarization 0x23, 0x22, 0x24, 0x25
RFIN5 Satellite B, low band, vertical polarization 0x23, 0x26, 0x20, 0x21
RFIN6 Satellite B, low band, horizontal polarization 0x23, 0x26, 0x20, 0x25
RFIN7 Satellite B, high band, vertical polarization 0x23, 0x26, 0x24, 0x21
RFIN8 Satellite B, high band, horizontal polarization 0x23, 0x26, 0x24, 0x25

RFIN2 Satellite C, low band, horizontal polarization 0x27, 0x22, 0x20, 0x25
RFIN3 Satellite C, high band, vertical polarization 0x27, 0x22, 0x24, 0x21
RFIN4 Satellite C, high band, horizontal polarization 0x27, 0x22, 0x24, 0x25
RFIN5 Satellite D, low band, vertical polarization 0x27, 0x26, 0x20, 0x21
RFIN6 Satellite D, low band, horizontal polarization 0x27, 0x26, 0x20, 0x25
RFIN7 Satellite D, high band, vertical polarization 0x27, 0x26, 0x24, 0x21
RFIN8 Satellite D, high band, horizontal polarization 0x27, 0x26, 0x24, 0x25

a reply if requested by a framing byte 0xE2 or 0xE3
in the master frame (refer to DiSEqC Bus Functional
Specification version 4.2, bottom of page 13). All DiSEqC
commands control the contents of the DiSEqC registers
described in chapter 7.1.

Table 3 lists the supported command bytes. The DiSEqC
commands are internally mapped to individually named
registers. The registers do not have an address.

DiSEqC COMMAND SEQUENCE

(Note 2)

10

Satellite IF Switch

Table 2. DiSEqC Slave Control Interface Command Bytes

HEX VALUE COMMAND FUNCTION DATA BYTES SLAVE REPLY

0x00 Reset Reset DiSEqC decoder — Framing byte

0x01 Clr Reset

0x04 Set Contend

0x05 Contend

0x06 Clr Contend

0x07 Address

0x08 Move C

0x09 Move

0x10 Status

0x11 Config

0x14 Switch 0

0x20 Set Lo

0x21 Set VR

0x22 Set Pos A

0x23 Set S0A

0x24 Set Hi

0x25 Set HL

0x26 Set Pos B

0x27 Set S0B

0x30 Sleep

0x31 Awake

Clear reset flag

Clears Status_reg, bit 0

Set contention flag

Sets Status_reg, bit 7

Return address only if contention flag is set

Reads Address_reg

Clear contention flag

Clears Status_reg, bit 7

Return address unless contention flag is set

Reads Address_reg

Change address only if contention flag is set

Writes to Address_reg

Change address unless contention flag is set

Writes to Address_reg

Read status register flags

Reads Status_reg

Read configuration flags

Reads Configuration_reg

Read switching state flags

Reads Switch_reg

Select the low local oscillator frequency

Clears Switch_reg, bit 4

Select vertical polarization (or right circular)

Clears Switch_reg, bit 5

Select satellite position A (or position C)

Clears Switch_reg, bit 6

Select switch option A (i.e. positions A/B)

Clears Switch_reg, bit 7

Select the high local oscillator frequency

Sets Switch_reg, bit 4

Select horizontal polarization (or left circular)

Sets Switch_reg, bit 5

Select satellite position B (or position D)

Sets Switch_reg, bit 6

Select switch option B (i.e. positions C/D)

Sets Switch_reg, bit 7

Ignore all bus commands except Awake

Sets Status_reg, bit 1

Respond to future bus commands normally

Clears Status_reg, bit 1

— Framing byte

— Framing byte

—

— Framing byte

—

1 byte Framing byte

1 byte Framing byte

—

—

—

— Framing byte

— Framing byte

— Framing byte

— Framing byte

— Framing byte

— Framing byte

— Framing byte

— Framing byte

— Framing byte

— Framing byte

Framing + data
byte

Framing + data
byte

Framing + data
byte

Framing + data
byte

Framing + data
byte

MAX12005

11

Satellite IF Switch

Table 2. DiSEqC Slave Control Interface Command Bytes (continued)

HEX VALUE COMMAND FUNCTION DATA BYTES SLAVE REPLY

0x38 Write N0

0x50 LO string

Write to port group 0
Controls Switch_reg, bits 7 downto 4 (Note 1)

Read current frequency

Reads Low_LOF_reg2/1 or High_LOF_reg2/1
depending on Switch_reg, bit 4 (Note 2)

1 byte Framing byte

—

Framing + 2 data
bytes

MAX12005

0x51 LO now

0x52 LO Lo

0x53 LO Hi

Note 1: Refer to DiSEqC Bus Functional Specification version 4.2, page 18.
Note 2: Refer to DiSEqC Bus Functional Specification version 4.2, page 22.

Read current frequency table entry number

Reads Low_LOF_reg0, bit 3 downto 0 or
High_LOF_reg0, bit 3 downto 0
depending on Switch_reg, bit 4

Read low-frequency table entry number

Reads Low_LOF_reg0, bit 3 downto 0

Read high-frequency table entry number

Reads High_LOF_reg0, bit 3 downto 0

Table 3. DiSEqC Slave Control Interface Registers

ADDRESS BIT ACC NAME FUNCTION DEFAULT

Address_reg 7:0 RW address DiSEqC address

7 RW contention Bus contention flag 0
6 R standby Standby mode 0
5 — Unused — —
4 R aux_power Auxiliary power available 0

Status_reg

Configuration_reg

3 — Unused — —

2 RW voltage 0 = Low DC, 1 = High DC

1 RW sleep 0 = Awake, 1 = Sleep 0
0 RW reset Reset flag 1
7 R analog Analog output facility 0
6 R standby Standby facility 0
5 R positioner Positioner capability 0
4 R power_detection External power-detection capability 0
3 R loop_through Loopthrough facility 0
2 R polarizer Polarizer capability 0
1 R switch Switcher capability 1
0 R lof_values LOF value output capability 1

—

—

—

Framing + data
byte

Framing + data
byte

Framing + data
byte

LNB: 0x11

Switch: 0x14

Depends on

voltage input

12

Satellite IF Switch

Table 3. DiSEqC Slave Control Interface Registers (continued)

ADDRESS BIT ACC NAME FUNCTION DEFAULT

7 RW option 0 = Positions A/B, 1 = Positions C/D 0
6 RW satellite 0 = Satellite A(C), 1 = Satellite B(D) 0
5 RW polarization 0 = Vertical, 1 = Horizontal 0
4 RW band 0 = Low band, 1 = High band 0

Switch_reg

Low_LOF_reg_2

Low_LOF_reg_1

Low_LOF_reg_0

High_LOF_reg_2

High_LOF_reg_1

High_LOF_reg_0

3 RW option_switchable Options switch available

2 R satellite_switchable Satellite switch available 1
1 R polarization_switchable Polarization switch available 1

0 R band_switchable Band switch available 1
7:4 R low_10GHz Low LOF value, 10GHz digit 0000
3:0 R low_1GHz 1GHz digit 1001
7:4 R low_100MHz 100MHz digit 0111
3:0 R low_10MHz 10MHz digit 0101
7:4 R low_1MHz 1MHz digit 0000
3:0 R low_table_entry Table entry number 0010
7:4 R high_10GHz High LOF value, 10GHz digit 0001
3:0 R high_1GHz 1GHz digit 0000
7:4 R high_100MHz 100MHz digit 0110
3:0 R high_10MHz 10MHz digit 0000
7:4 R high_1MHz 1MHz digit 0000
3:0 R high_table_entry Table entry number 0100

MAX12005

Depends on

cascade input

Chip Information

PROCESS: BiCMOS

Package Information

For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.

PACKAGE

TYPE

48 TQFN T4877+4

PACKAGE

CODE

OUTLINE

NO.

21-0144 90-0130

LAND

PATTERN NO.

13

Satellite IF Switch

Revision History

REVISION

NUMBER

0 9/10 Initial release —

REVISION

DATE

MAX12005

DESCRIPTION

PAGES

CHANGED

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.

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