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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
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MAX12005
Satellite IF Switch
19-5554; Rev 1; 10/11
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.
Ordering Information
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 com-
pensated 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 opera-
tional 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).
Applications
Direct Broadcast Satellite Receivers
Satellite IF Distribution
L-Band Distribution
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
DiSEqC is a trademark of EUTELSAT.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX12005ETM+ -40NC to +85NC48 TQFN-EP*
MAX12005
Satellite IF Switch
2
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.
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 (VCC + 0.3V)
DISEQC_TX1–DISEQC_TX4 to GND .........-0.3V to (VCC + 0.3V)
DISEQC_RX1–DISEQC_RX4 to GND ........-0.3V to (VCC + 0.3V)
GAIN_SELECT, MODE_SELECT
to GND ...................................................-0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70NC)
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, TA = -40NC to +85NC, mode set to master, input gain stages set to highest gain, inputs matched to 75I,
output loads = 75I. Typical values are at +3.3V and at TA = +25NC, unless otherwise noted.) (Note 1)
ABSOLUTE MAXIMUM RATINGS
CAUTION! ESD SENSITIVE DEVICE
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VCC 3.0 3.5 V
Supply Current ICC VCC = 3.3V, 0dB, one input selected, four
outputs selected 150 250 mA
+12dB GAIN_SELECT Input High-
Level Voltage VIH VCC -
0.4V V
+6dB GAIN_SELECT Input Voltage
Level and Range VIN 1/2 VCC
Q200mV mV
0dB GAIN_SELECT Input Low-Level
Voltage VIL 0.4 V
Single MODE_SELECT Input High-
Level Voltage VIH VCC -
0.4V V
Master MODE_SELECT Input Voltage
Level and Range VIN 2/3 VCC
Q200mV mV
Slave MODE_SELECT Input Voltage
Level and Range VIN 1/3 VCC
Q200mV mV
LNB MODE_SELECT Input Low-Level
Voltage VIL 0.4 V
GAIN_SELECT and MODE_SELECT
Input Current IIN VIN = VCC 10 FA
DC Voltage Detect Input High Level VIH (Note 2) 1.23 V
DC Voltage Detect Input Low Level VIL (Note 2) 1.11 V
DISEQC_RX_ Input Current IIN VIN = high or low 1FA
DISEQC_TX_ Output High-Level
Voltage VOH ILOAD = -1mA VCC -
0.4V V
DISEQC_TX_ Output Low-Level
Voltage VOL ILOAD = +1mA 0.4 V
MAX12005
Satellite IF Switch
3
AC ELECTRICAL 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 TA = +25NC, unless otherwise
noted.) (Note 1)
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 VOL = 14.75V maximum and VOH = 16.75V minumum.
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.
Note 5: 60mVP-P square wave for fIN = 22kHz. For sine wave, the typical minimum is 100mVP-P.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operation Frequency fRF 950 2150 MHz
DISEQC_RX_ Tone Input Level VIN fIN = 22kHz (Note 5) 60 mVP-P
Switch Gain at 950MHz (Note 3)
0dB gain 0
dB+6dB gain +6
+12dB gain +12
Cascade Input Switch Gain at
950MHz |S21| 0 dB
Switch-to-Switch Gain Match D|S21|At 950MHz (Note 4) -1.5 +3.5 dB
Gain Slope with Frequency Between 950MHz and 2150MHz +3 dB
Single-Input Source Gain Change
Gain change from single output con-
nected to a single input to four outputs
connected to a single input
-0.4 dB
3rd-Order Intermodulation Product
(Case 1) IM3
Output level set to +89dBFV by varying
three equal amplitude tones at 955MHz,
962MHz, and 965MHz; measure products
at 952MHz and 958MHz
-35 dBc
3rd-Order Intermodulation Product
(Case 2) IM3
Output level set to +89dBFV by varying
three equal amplitude tones at 2135MHz,
2142MHz, and 2145MHz; measure prod-
ucts at 2132MHz and 2138MHz
-34 dBc
RFIN1–RFIN8 Input Return Loss |S11| -12 dB
CASCADE_IN1–CASCADE_IN4 Input
Return Loss |S11| -12 dB
RFOUT1–RFOUT4 Output Return Loss |S22| -12 dB
Switch Isolation 55 dB
Port-to-Port Isolation 33 dB
DiSEqC Clock fOSC 8 MHz
MAX12005
Satellite IF Switch
4
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 TA = +25NC, unless otherwise noted.
Production tested at +25NC; guaranteed by design and characterization at -40NC and +85NC.)
VOLTAGE vs. CURRENT (0dB GAIN)
MAX12005 toc01
VOLTAGE (V)
CURRENT (mA)
3.53.43.33.23.13.0
140
160
180
200
120
2.9 3.6
TA = +85°C
TA = +25°C
TA = -40°C
VOLTAGE vs. GAIN (+25°C)
MAX12005 toc02
VOLTAGE (V)
GAIN (dB)
3.53.43.33.23.13.0
-3
-2
-1
0
1
2
-4
2.9 3.6
2150MHz 1550MHz
950MHz
S21 +25°C (0dB GAIN, VAR. IN/OUT)
MAX12005 toc03
FREQUENCY (Hz)
MAGNITUDE (dB)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
-3
-2
-1
0
1
2
3
4
-4
9.5E+08
2.15E+09
S21 +85°C (0dB GAIN, VAR. IN/OUT)
MAX12005 toc04
FREQUENCY (Hz)
MAGNITUDE (dB)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
-3
-2
-1
0
1
2
3
4
-4
9.5E+08
2.15E+09
S21 -40°C (0dB GAIN, VAR. IN/OUT)
MAX12005 toc05
FREQUENCY (Hz)
MAGNITUDE (dB)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
-3
-2
-1
0
1
2
3
4
-4
9.5E+08
2.15E+09
RF S11 (VAR. INPUT)
MAX12005 toc06
FREQUENCY (Hz)
MAGNITUDE (dB)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
-35
-40
-30
-25
-20
-15
-10
-5
-50
9.5E+08
2.15E+09
-45
RF S22 (VAR. OUTPUT)
MAX12005 toc07
FREQUENCY (Hz)
MAGNITUDE (dB)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
-35
-40
-30
-25
-20
-15
-10
-5
-50
9.5E+08
2.15E+09
-45
PORT-TO-PORT ISOLATION (VAR. PORTS)
MAX12005 toc08
FREQUENCY (Hz)
ISOLATION (dB)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
-80
-70
-60
-50
-40
-30
-20
-10
-90
9.5E+08
2.15E+09
SWITCH ISOLATION (VAR. CH)
MAX12005 toc09
ISOLATION
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-80
FREQUENCY (Hz)
1.95E+09
1.75E+09
1.15E+09
1.35E+09
1.55E+09
9.5E+08
2.15E+09
MAX12005
Satellite IF Switch
5
Pin Configuration
Pin Description
TOP VIEW
TQFN
13
14
15
16
17
18
19
20
21
22
23
24
RFIN7
GND
RFIN8
GND
CASCADE_IN1
GND
CASCADE_IN2
GND
CASCADE_IN3
GND
CASCADE_IN4
GND
48
47
46
45
44
43
42
41
40
39
38
37
12345678910 11 12
GAIN_SELECT
MODE_SELECT
VCC
VCC
GND
RFOUT1
VCC
GND
RFOUT2
VCC
GND
RFOUT3
GND
RFIN6
GND
RFIN5
GND
RFIN4
GND
RFIN3
GND
RFIN2
GND
RFIN1
36 35 34 33 32 31 30 29 28 27 26 25
DISEQC_TX4
DISEQC_RX4
DISEQC_TX3
DISEQC_RX3
DISEQC_TX2
DISEQC_RX2
DISEQC_TX1
DISEQC_RX1
VCC
RFOUT4
GND
VCC
MAX12005
+
PIN NAME FUNCTION
1 RFIN1 RF Input from LNB
2, 4, 6, 8, 10, 12,
14, 16, 18, 20,
22, 24, 35, 38,
41, 44
GND Electrical Ground
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
MAX12005
Satellite IF Switch
6
Pin Description (continued)
PIN NAME FUNCTION
25 DISEQC_TX4 Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller
26 DISEQC_RX4 Input for DiSEqC Slave Signal from Satellite Receiver or Master
27 DISEQC _TX3 Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller
28 DISEQC _RX3 Input for DiSEqC Slave Signal from Satellite Receiver or Master
29 DISEQC _TX2 Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller
30 DISEQC _RX2 Input for DiSEqC Slave Signal from Satellite Receiver or Master
31 DISEQC _TX1 Return DiSEqC Signal Output to Satellite Receiver (Master) or Outputs Envelope of
Received DiSEqC Signal for Use by External Controller
32 DISEQC _RX1 Input for DiSEqC Slave Signal from Satellite Receiver or Master
33, 36, 39, 42,
45, 46 VCC 3.0V to 3.5V Supply. Analog supply pins 33, 36, 39, and 42. Digital supply pins 45 and
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 Exposed Pad Ground. The exposed pad must be soldered to the circuit board for prop-
er thermal and electrical performance.
MAX12005
Satellite IF Switch
7
Functional Diagram
33, 36, 39, 42, 45
RFIN1
1
3
5
7
RFIN2
RFIN3
RFIN4
RFIN5
RFIN6
RFIN7
RFIN8
9
11
13
15
0/+6/+12dB
9:1 MUX
9:1 MUX
9:1 MUX
PORT SWITCH CONTROL
DISEQC_TX1
CASCADE_IN1
CASCADE_IN2
DiSEqC 2.0
DiSEqC 2.0
VOLTAGE/ TONE
DETECTOR
VOLTAGE/ TONE
DETECTOR
DiSEqC 2.0
VOLTAGE/ TONE
DETECTOR
DiSEqC 2.0
VOLTAGE/ TONE
DETECTOR
3117 19 21 23 32 29 30 27 28 2, 4, 6, 8, 10, 12, 14, 18,
20, 22, 24, 35, 38, 41, 44
25 26
DISEQC_RX1
DISEQC_TX2
DISEQC_RX2
DISEQC_TX3
DISEQC_RX3
DISEQC_TX4
DISEQC_RX4
CONTROL
LOGIC
VCC
MODE_SELECT
GAIN_SELECT
46
34
37
40
43
RFOUT1
SATELLITE IF SWITCH
VCC
RFOUT2
RFOUT3
RFOUT4
8MHz
OSCILLATOR
GND
FREQUENCY
OUT
9:1 MUX 47
48
16
GND
MAX12005
CASCADE_IN3
CASCADE_IN4
MAX12005
Satellite IF Switch
8
Detailed Description
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
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.
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
VCC = +12dB
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.
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 VCC = Slave Mode (Cascade Operation)
2/3 VCC = Master Mode (Cascade Operation)
VCC = Single Mode
The slave mode and master mode voltages can be set
through the use of simple supply voltage-dividers.
Switch Control
Voltage/tone signaling is the default switch control after
power-up or when a receiver is connected or recon-
nected 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 VCC node is recom-
mended. The VCC traces branch out from this node,
each going to a separate VCC node in the circuit. Place
a bypass capacitor as close as possible to each sup-
ply pin. This arrangement provides local decoupling at
each VCC pin. Use at least one via per bypass capacitor
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 power-
supply PCB proper line. Make connections from vias
to the ground plane as short as possible. On the high-
impedance ports, keep traces short to minimize shunt
capacitance. EV kit schematic and Gerber files can be
found at www.maxim-ic.com.
SPI is a trademark of Motorola, Inc.
MAX12005
Satellite IF Switch
9
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:
0x00 Any device
0x10 Any LNB, switcher, or SMATV
0x11 LNB
0x14 Switcher, DC-blocking
Figure 1. Typical Cascade Connection Between Two Satellite Switch ICs
RFIN1 SAT A, LOW, VERTICAL
TO SAT RECEIVER 1
PRIMARY DEVICE
RFOUT1
RFOUT2
CASCADE1
CASCADE2
CASCADE3
CASCADE4
RFOUT3
RFOUT4
TO SAT RECEIVER 2
TO SAT RECEIVER 3
TO SAT RECEIVER 4
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
RFIN2
RFIN3
RFIN4
RFIN5
RFIN6
RFIN7
RFIN8
RFIN1 SAT C, LOW, VERTICAL
SECONDARY DEVICE
RFOUT1
RFOUT2
CASCADE1
CASCADE2
CASCADE3
CASCADE4
RFOUT3
RFOUT4
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
RFIN2
RFIN3
RFIN4
RFIN5
RFIN6
RFIN7
RFIN8
MAX12005
Satellite IF Switch
10
Table 1. DiSEqC Slave Control Interface
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.
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 com-
mand byte is the 3.byte in the DiSEqC master frame
(refer to the DiSEqC Bus Functional Specification ver-
sion 4.2, top of page 13). The DiSEqC slave only sends
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.
DEVICE
(Note 1) INPUT SIGNAL FROM DiSEqC COMMAND SEQUENCE
(Note 2)
Primary RFIN1 Satellite A, low band, vertical polarization 0x23, 0x22, 0x20, 0x21
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
Secondary RFIN1 Satellite C, low band, vertical polarization 0x27, 0x22, 0x20, 0x21
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
MAX12005
Satellite IF Switch
11
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 Clear reset flag
Clears Status_reg, bit 0 — Framing byte
0x04 Set Contend Set contention flag
Sets Status_reg, bit 7 — Framing byte
0x05 Contend Return address only if contention flag is set
Reads Address_reg —Framing + data
byte
0x06 Clr Contend Clear contention flag
Clears Status_reg, bit 7 — Framing byte
0x07 Address Return address unless contention flag is set
Reads Address_reg —Framing + data
byte
0x08 Move C Change address only if contention flag is set
Writes to Address_reg 1 byte Framing byte
0x09 Move Change address unless contention flag is set
Writes to Address_reg 1 byte Framing byte
0x10 Status Read status register flags
Reads Status_reg —Framing + data
byte
0x11 Config Read configuration flags
Reads Configuration_reg —Framing + data
byte
0x14 Switch 0 Read switching state flags
Reads Switch_reg —Framing + data
byte
0x20 Set Lo Select the low local oscillator frequency
Clears Switch_reg, bit 4 — Framing byte
0x21 Set VR Select vertical polarization (or right circular)
Clears Switch_reg, bit 5 — Framing byte
0x22 Set Pos A Select satellite position A (or position C)
Clears Switch_reg, bit 6 — Framing byte
0x23 Set S0A Select switch option A (i.e. positions A/B)
Clears Switch_reg, bit 7 — Framing byte
0x24 Set Hi Select the high local oscillator frequency
Sets Switch_reg, bit 4 — Framing byte
0x25 Set HL Select horizontal polarization (or left circular)
Sets Switch_reg, bit 5 — Framing byte
0x26 Set Pos B Select satellite position B (or position D)
Sets Switch_reg, bit 6 — Framing byte
0x27 Set S0B Select switch option B (i.e. positions C/D)
Sets Switch_reg, bit 7 — Framing byte
0x30 Sleep Ignore all bus commands except Awake
Sets Status_reg, bit 1 — Framing byte
0x31 Awake Respond to future bus commands normally
Clears Status_reg, bit 1 — Framing byte
MAX12005
Satellite IF Switch
12
Table 2. DiSEqC Slave Control Interface Command Bytes (continued)
Table 3. DiSEqC Slave Control Interface Registers
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.
HEX VALUE COMMAND FUNCTION DATA BYTES SLAVE REPLY
0x38 Write N0 Write to port group 0
Controls Switch_reg, bits 7 downto 4 (Note 1) 1 byte Framing byte
0x50 LO string
Read current frequency
Reads Low_LOF_reg2/1 or High_LOF_reg2/1
depending on Switch_reg, bit 4 (Note 2)
—Framing + 2 data
bytes
0x51 LO now
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
—Framing + data
byte
0x52 LO Lo Read low-frequency table entry number
Reads Low_LOF_reg0, bit 3 downto 0 —Framing + data
byte
0x53 LO Hi Read high-frequency table entry number
Reads High_LOF_reg0, bit 3 downto 0 —Framing + data
byte
ADDRESS BIT ACC NAME FUNCTION DEFAULT
Address_reg 7:0 RW address DiSEqC address LNB: 0x11
Switch: 0x14
Status_reg
7 RW contention Bus contention flag 0
6 R standby Standby mode 0
5 — Unused — —
4 R aux_power Auxiliary power available 0
3 — Unused — —
2 RW voltage 0 = Low DC, 1 = High DC Depends on
voltage input
1 RW sleep 0 = Awake, 1 = Sleep 0
0 RW reset Reset flag 1
Configuration_reg
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
MAX12005
Satellite IF Switch
13
Table 3. DiSEqC Slave Control Interface Registers (continued)
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.
Chip Information
PROCESS: BiCMOS
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
48 TQFN T4877+4 21-0144 90-0130
ADDRESS BIT ACC NAME FUNCTION DEFAULT
Switch_reg
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
3 RW option_switchable Options switch available Depends on
cascade input
2 R satellite_switchable Satellite switch available 1
1 R polarization_switchable Polarization switch available 1
0 R band_switchable Band switch available 1
Low_LOF_reg_2 7:4 R low_10GHz Low LOF value, 10GHz digit 0000
3:0 R low_1GHz 1GHz digit 1001
Low_LOF_reg_1 7:4 R low_100MHz 100MHz digit 0111
3:0 R low_10MHz 10MHz digit 0101
Low_LOF_reg_0 7:4 R low_1MHz 1MHz digit 0000
3:0 R low_table_entry Table entry number 0010
High_LOF_reg_2 7:4 R high_10GHz High LOF value, 10GHz digit 0001
3:0 R high_1GHz 1GHz digit 0000
High_LOF_reg_1 7:4 R high_100MHz 100MHz digit 0110
3:0 R high_10MHz 10MHz digit 0000
High_LOF_reg_0 7:4 R high_1MHz 1MHz digit 0000
3:0 R high_table_entry Table entry number 0100
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. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
14 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX12005
Satellite IF Switch
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 9/10 Initial release —
1 11/11 Added Note 5 to Electrical Characteristics table 3
