SEMICMF.017 1
Features
• Single chip synthesised downconverter forming a
complete double conversion tuner when
combined with the SL2100 or SL2101
• Compatible with digital and analogue system
requirements
• CTB contribution < -64 dBc, CXM contribution
< -62 dBc and spectral spread < -64 dBc
• IF amplifier optimised to interface with standard
SAW filters
• Extremely low phase noise balanced local
oscillator with I2C bus controlled band switching
and with very low fundamental and harmonic
radiation
• Integral fast mode compliant I2C bus controlled
PLL frequency synthesiser designed for high
comparison frequencies and low phase noise
performance
• Full ESD protection. (Normal ESD handling
procedures should be observed)
Applications
• Double conversion tuners
• Digital Terrestrial tuners
• Cable Modems
• Data transmit systems
• Data communications systems
•MATV
Description
The ZL10100 is a fully integrated single chip mixer
oscillator with on-board low phase noise I2C bus
controlled PLL frequency synthesiser. It is intended
primarily as the down converter for application in
double conversion tuners and is compatible with HIIF
frequencies between 1 and 1.3 GHz and all standard
tuner IF output frequencies.
The device contains all elements necessary, with the
exception of local oscillator tuning network, loop filter
and crystal reference to fabricate a complete
synthesised block converter with IF amplifier,
compatible with digital and analogue requirements.
DS5736 Issue 1.4 July 2002
Ordering Information
ZL10100/DDA (Tubes)
ZL10100/DDB (Tape & Reel)
-40°C to 85°C
ZL10100
Single Chip Synthesised
Downconverter with IF Amplifier
Data Sheet
Figure 1 - ZL10100 Functional Block Diagram
RF Input
RF InputB
IF Output
IF OutputB
VCO
LO
LOB
Charge
Pump
15 Bit
Programmable
Divider
Pump
Drive
fpd/
2
I2C Bus
Interface
SDA
SCL
ADD
Reference Divider
REF
OSC Port P0
Fpd/2
Fcomp
XTAL
XTALCAP
ZL10100 Data Sheet
2SEMICMF.017
Pin Description
Figure 2 - Pin Description
Quick Reference Data
All data applies with the following conditions unless otherwise stated;
a) Output load of 150 Ω, differential
b) Input spectrum of 5 channels centred on 1220 MHz, each carrier @ 77 dBµV
Characteristic Units
RF input operating range 1-1.3 GHz
IF output operating range 30-60 MHz
Input noise figure, SSB 9 dB
Conversion gain, diff to diff 24 dB
CTB < −66 dBc
CXM < −63 dBc
Spectral spread < −70 dBc
Local oscillator phase noise
SSB @ 10 kHz offset
SSB @ 100 kHz offset
c -93
c-115
dBc/Hz
dBc/Hz
Local oscillator phase noise floor -136 dBc/Hz
IF output impedance, differential 150 Ω
PLL phase noise at phase detector, 1 MHz comparison
frequency
-152 dBc/Hz
IFOUTPUTB
Vee
VccRF
Vee
RFINPUTB
RFINPUT
Vee
Vee
VccD
Vee
SCL
SDA
XTAL
XTAL CAP
IFOUTPUT
Vee
VccIF
Vee
VccLO
LO
LOB
VccLO
Vee
ADD
Vee
Port P0
DRIVE
PUMP
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
28
27
26
25
24
23
22
21
Data Sheet ZL10100
3
SEMICMF.017
1.0 Functional Description
The ZL10100 is a bipolar, broadband wide dynamic range mixer oscillator with on-board I2C bus controlled PLL
frequency synthesiser, optimised for application as the down converter in double conversion tuner systems. It
also has application in any system where a wide dynamic range broadband synthesised frequency converter is
required.
The ZL10100 is a single chip solution containing all necessary active circuitry and simply requires an external
tuneable resonant network for the local oscillator sustaining network. The pin assignment is contained in the
the block diagram in Figure 1 and the Pin Description in Figure 2.
1.1 Converter section
In normal application the HIIF input is interfaced through appropriate impedance matching to the device input.
The RF input preamplifier of the device is designed for low noise figure, within the operating region of 1 to 1.3
GHz and for high intermodulation distortion intercept so offering good signal to noise plus composite distortion
spurious performance when loaded with a multi carrier system. The preamplifier also provides gain to the mixer
section and back isolation from the local oscillator section. The typical RF input impedance and matching
network for matching to a 1220 MHz HIIF filter, type B1603 are contained in Figures 3 and 4.
The output of the preamplifier is fed to the mixer section which is optimised for low radiation application. In this
stage the RF signal is mixed with the local oscillator frequency, which is generated by the on-board oscillator.
The oscillator block uses an external tuneable network and is optimised for low phase noise. The typical
application is shown in Figure 5, and the phase noise performance in Figure 6. This block interfaces direct with
the internal PLL to allow for frequency synthesis of the local oscillator.
The output of the mixer is internally coupled to a differential IF amplifier, which provides further gain and
provides for a 150 Ω, differential output impedance and drive capability. The IF amplifier allows for IF
frequencies between 30 and 60 MHz.
The typical IF output impedance is contained in Figure 7.
The typical key performance data at 5V Vcc and 25 deg C ambient are shown in the Quick Reference Data
section on Page 2.
1.2 Local Oscillator
To maximise the local oscillator phase noise performance, the application circuit as in Figure 5 must be
carefully adhered to including the component type and manufacture where applicable, strip line dimension and
board material. Any deviation from these parameters may adversely affect phase noise characteristics and so
will require re-optimisation.
1.3 PLL frequency Synthesiser
The PLL frequency synthesiser section contains all the elements necessary, with the exception of a reference
frequency source and loop filter to control the oscillator, so forming a complete PLL frequency synthesised
source. The device allows for operation with a high comparison frequency and is fabricated in high speed logic,
which enables the generation of a loop with good phase noise performance.
The LO signal from the oscillator drives an internal preamplifier, which provides gain and reverse isolation from
the divider signals. The output of the preamplifier interfaces direct with the 15-bit fully programmable divider.
The programmable divider is of MN+A architecture, where the dual modulus prescaler is 16/17, the A counter is
4-bits, and the M counter is 11 bits.
The output of the programmable divider is fed to the phase comparator where it is compared in both phase and
frequency domain with the comparison frequency. This frequency is derived either from the on-board crystal
controlled oscillator or from an external reference source. In both cases the reference frequency is divided
down to the comparison frequency by the reference divider which is programmable into 1 of 29 ratios as
detailed in Table 1. The typical application for the crystal oscillator is contained in Figure 8 which also
demonstrates how a 4 MHz reference signal can be coupled out to a further PLL frequency synthesiser, such as
the upconverter section in a double conversion tuner.
ZL10100 Data Sheet
4SEMICMF.017
The output of the phase detector feeds a charge pump and loop amplifier, which when used with an external
loop filter and high voltage transistor, integrates the current pulses into the varactor line voltage, used for
controlling the oscillator.
The programmable divider output Fpd divided by two and the reference divider output Fcomp can be switched
to port P0 by programming the device into test mode. The test modes are described in Table 2.
2.0 Programming
The ZL10100 is controlled by an I2C data bus and is compatible with both standard and fast mode formats.
Data and Clock are fed in on the SDA and SCL lines respectively as defined by I2C bus format. The device can
either accept data (write mode), or send data (read mode). The LSB of the address byte (R/W) sets the device
into write mode if it is low, and read mode if it is high. Tables 3, 4 and 5 illustrate the format of the data. The
device can be programmed to respond to several addresses, which enables the use of more than one device in
an I2C bus system. Table 5 shows how the address is selected by applying a voltage to the 'ADD' input. When
the device receives a valid address byte, it pulls the SDA line low during the acknowledge period, and during
following acknowledge periods after further data bytes are received. When the device is programmed into read
mode, the controller accepting the data must pull the SDA line low during all status byte acknowledge periods
to read another status byte. If the controller fails to pull the SDA line low during this period, the device
generates an internal STOP condition, which inhibits further reading.
2.1 Write mode
With reference to Table 5, bytes 2 and 3 contain frequency information bits 214-20 inclusive. Byte 4 controls the
synthesiser reference divider ratio, see Table 1 and the charge pump setting, see Table 6. Byte 5 controls the
test modes, see Table 2 and the output port P0.
After reception and acknowledgement of a correct address (byte 1), the first bit of the following byte determines
whether the byte is interpreted as a byte 2 or 4, a logic '0' indicating byte 2, and a logic '1' indicating byte 4.
Having interpreted this byte as either byte 2 or 4 the following data byte will be interpreted as byte 3 or 5
respectively. Having received two complete data bytes, additional data bytes can be entered, where byte
interpretation follows the same procedure, without re-addressing the device. This procedure continues until a
STOP condition is received. The STOP condition can be generated after any data byte, if however it occurs
during a byte transmission, the previous byte data is retained. To facilitate smooth fine tuning, the frequency
data bytes are only accepted by the device after all 15 bits of frequency data have been received, or after the
generation of a STOP condition.
2.2 Read mode
When the device is in read mode, the status byte read from the device takes the form shown in Table 4.
Bit 1 (POR) is the power-on reset indicator, and this is set to a logic '1' if the Vcc supply to the device has
dropped below 3V (at 25°C), e.g., when the device is initially turned ON. The POR is reset to '0' when the read
sequence is terminated by a STOP command. When POR is set high this indicates that the programmed
information may have been corrupted and the device reset to the power up condition.
Bit 2 (FL) indicates whether the synthesiser is phase locked, a logic '1' is present if the device is locked, and a
logic '0' if the device is unlocked.
Data Sheet ZL10100
5
SEMICMF.017
Figure 3 - Typical RF input impedance
Figure 4 - RF input impedance matching network to B1603 HIIF filter
Programmable Features
Synthesiser programmable divider Function as described above.
Reference programmable divider Function as described above.
Charge pump current The charge pump current can be programmed by bits C1 and
C0 within data byte 4, as defined in Table 6.
Test mode The test modes are defined by bits T2-T0 as described in
Table 2.
General purpose ports, P0 The general purpose port can be programmed by bits P0;
Logic ’1’ = on
Logic ’0’ = off (high impedance)
CH1 S 11 1 U FS
START 1 000.000 000 MHz STOP 1 300.000 000 MHz
B1 4.7V
Cor
Avg
16
Smo
PRm
Z0
50
26 Jun 2002 14:18:23
1
2
3
4
1_: 33.309 -74.777 2.1284 pF
1 000.000 000 MHz
2_: 29.262
-66.289
1.1 GHz
3_: 24.57
-58.744
1.22 GHz
4_: 22.332
-54.303
1.3 GHz
5
6
6
5
8.2 nH
2.7 pF
2.7 pF
ZL10100
B1603
ZL10100 Data Sheet
6SEMICMF.017
Figure 5 - Oscillator Application
Figure 6 - Typical phase noise performance with application as in Figure 5
1 k
Ω
Varactor
line
BB555
4.3 nH
23
22
2 pF
-110
-105
-100
-95
-90
-85
-80
1010 1060 1110 1160 1210
LO Frequency (MHz)
Phase noise (@ 10KHz offset),
dBc
Data Sheet ZL10100
7
SEMICMF.017
Figure 7 - Typical IF output impedance single-ended
CH1 S 11 1 U FS
START 30.000 000 MHz STOP 60.000 000 MHz
B1 PIN1 4.7V
Cor
Avg
16
Smo
PRm
Z0
75
25 Jun 2002 06:58:03
1
2
3
4
1_: 76.695 -5.6172 944.45 pF
30.000 000 MHz
2_: 75.914
-7.2539
44 MHz
3_: 75.391
-7.9023
50 MHz
4_: 74.152
-9.207
60 MHz
ZL10100 Data Sheet
8SEMICMF.017
Table 1. Reference Division Ratios
Figure 8 - Crystal oscillator application
R4 R3 R2 R1 R0 Ratio
00000 2
00001 4
00010 8
00011 16
00100 32
00101 64
00110 128
00111 256
01000 Illegal state
01001 5
01010 10
01011 20
01100 40
01101 80
01110 160
01111 320
10000 Illegal state
10001 6
10010 12
10011 24
10100 48
10101 96
10110 192
10111 384
11000 Illegal state
11001 7
11010 14
11011 28
11100 56
11101 112
11110 224
11111 448
Reference
47 pF
10 pF
XTALCAP
XTAL
47 pF
4 MHz
frequency
output
Data Sheet ZL10100
9
SEMICMF.017
Table 2. Test modes
* clocks need to be present on crystal and local oscillator to enable
charge pump test modes and to toggle status byte bit FL
Table 3. Write data format (MSB is transmitted first)
Table 4. Read data format (MSB is transmitted first)
A : Acknowledge bit
MA1,MA0 : Variable address bits (see Table 5)
214-20: Programmable division ratio control bits
C1-C0 : Charge pump current select (see Table 6)
R4-R0 : Reference division ratio select (seeTable 1)
T2-T0 : Test mode control bits (see Table 2)
P0 : P0 port output state
POR : Power on reset indicator
FL : Phase lock flag
X : 'Don't care'
Table 5. Address selection
# Programmed by connecting a 30 kΩ resistor between pin and Vcc
T2 T1 T0 Test Mode Description
0 0 0 Normal operation
0 0 1 Charge pump sink*
Status byte FL set to logic ’0’
0 1 0 Charge pump source*
Status byte FL set to logic ’0’
0 1 1 Charge pump disabled*
Status byte FL set to logic ’1’
1 0 0 Normal operation and Port P0 = Fpd/2
1 0 0 Charge pump sink*
Status byte FL set to logic ’0’
Port P0 = Fcomp
1 1 0 Charge pump source*
Status byte FL set to logic ’0’
Port P0 = Fcomp
1 1 1 Charge pump disabled*
Status byte FL set to logic ’1’
Port P0 = Fcomp
MSB LSB
Address 1 1 0 0 0 MA1 MA0 0 A Byte 1
Programmable divider 0 214 213 212 211 210 2928AByte 2
Programmable divider 2726252423222120AByte 3
Control data 1 C1 C0 R4 R3 R2 R1 R0 A Byte 4
Control data T2 T1 T0 X X X 0 P0 A Byte 5
MSB LSB
Address 1 1 0 0 0 MA1 MA0 1 A Byte 1
Status Byte POR FL 0 0 0 0 0 0 A Byte 2
MA1 MA0 Address Input Voltage Level
0
0
1
1
0
1
0
1
0-0.1 Vcc
Open circuit
0.4Vcc - 0.6 Vcc #
0.9 Vcc - Vcc
ZL10100 Data Sheet
10 SEMICMF.017
Table 6. Charge pump current
C1 C0 Current in µA
min typ max
0
0
1
1
0
1
0
1
± 98
± 210
± 450
± 975
± 130
± 280
± 600
± 1300
± 162
± 350
± 750
± 1625
Electrical Characteristics - Test conditions (unless otherwise stated)
Tamb = -40°C to 85°C, Vee= 0V, Vcc=5V±5%. Input frequency 1220 MHz. IF output frequency 44 MHz.
These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply
voltage unless otherwise stated.
Characteristic Pin Min Typ Max Units Conditions
Supply current 120 160 mA
Input frequency range 1 1.3 GHz
Composite peak input signal 86 dBµV Operating condition only.
Input impedance See Figure 3.
Input Noise Figure 9 11 dB Tamb = 27°C
Conversion gain 20 23 26 dB Differential to differential
voltage gain to differential
150 Ω load.
Gain variation within channel 0.5 dB Channel bandwidth 8 MHz
within operating frequency
range.
Through gain -30 dB
CTB -64 dBc See note 4.
CXM -62 dBc See note 4.
LO operating range 0.9 1.6 GHz Maximum tuning range
determined by application,
see note (3), guaranteed by
design.
LO phase noise, SSB
@ 10 kHz offset
@ 100 kHz offset
-94
-116
-90
-110
dBc/Hz
dBc/Hz
See Figure 6.
Application as in Figure 5.
LO phase noise floor -136 dBc/Hz Application as in Figure 5.
IF output frequency range 30 60 MHz
IF output impedance 75 ΩSingle-ended. See Figure 7.
IF output return loss -20 dΒSee Figure 7, over operating
range.
All other spurs on IF Output 20 dBµV Within channel bandwidth of
8 MHz.
Data Sheet ZL10100
11
SEMICMF.017
Notes
(1) When measuring from a 50Ω environment, the voltage step up transformation needs to be taken into account.
(2) Port powers up in high impedance state.
(3) To maximise phase noise the tuning range should be minimised and Q of resonator maximised. The application as in Figure 5 has a
tuning range of 200 MHz.
(4) Measured with 5 channels @ 77 dBuV centred on desired channel .
SYNTHESISER
SDA, SCL
Input high voltage
Input low voltage
Input high current
Input low current
Leakage current
Hysterysis
3
0
-10
0.4
5.5
1.5
10
10
V
V
µA
µA
µA
V
I2C ’Fast mode’ compliant
Input voltage = Vcc
Input voltage = Vee
Vcc=Vee
SDA output voltage 0.4
0.6
V
V
Isink = 3 mA
Isink = 6 mA
SCL clock rate 400 kHz
Charge pump output current ±3 ±10 nA See Table 6.
Vpin = 2V
Charge pump drive output current 0.5 mA Vpin = 0.7V
Crystal frequency 2 20 MHz See Figure 8 for application.
Recommended crystal series
resistance
10 200 Ω4 MHz parallel resonant
crystal
External reference input frequency 2 20 MHz Sinewave coupled through
10 nF blocking capacitor
External reference drive level 0.2 0.5 Vpp Sinewave coupled through
10 nF blocking capacitor
Phase detector comparison
frequency
4MHz
Equivalent phase noise at phase
detector -152
-158
dBc/Hz
dBc/Hz
SSB, within loop bandwidth
2 MHz
250 kHz
Local oscillator programmable divider
division ratio
240 32767
Reference division ratio See Table 1.
Output port
sink current
leakage current
2
10
mA
µA
See note 2.
Vport = 0.7
Vport = Vcc
Address select
Input high current
Input low current
1
-0.5
mA
mA
See Table 5
Vin = Vcc
Vin = Vee
Electrical Characteristics - Test conditions (unless otherwise stated)
Tamb = -40°C to 85°C, Vee= 0V, Vcc=5V±5%. Input frequency 1220 MHz. IF output frequency 44 MHz.
These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply
voltage unless otherwise stated.
Characteristic Pin Min Typ Max Units Conditions
ZL10100 Data Sheet
12 SEMICMF.017
Absolute Maximum Ratings - All voltages are referred to Vee at 0V.
Characteristic Min Max Units Conditions
Supply voltage -0.3 7 V
RF input voltage 117 dBuV Differential
All I/O port DC offsets -0.3 Vcc+0.3 V
SDA, SCL DC offsets -0.3 6 V Vcc = Vee to 5.25V
Storage temperature -55 150 °C
Junction temperature 150 °C
Package thermal resistance, chip to case 20 °C/W
Package thermal resistance, chip to case 80 °C/W
Power consumption at 5.25V 700 mW
ESD protection 3.5 kV Mil-std 883B method 3015 cat1
Data Sheet ZL10100
13
SEMICMF.017
RF Inputs Reference Oscillator
Oscillator Inputs SDA/SCL (pins 12 and 11)
IF Outputs Output Port
Loop Amplifier ADD Input
Figure 9 - Input and Output Interface Circuits
RFINPUTB
RFINPUT
5
6
XTAL
XTALCAP
13
14
vcc
200µA
LO
LOB
23
22
VREF
500K 500K
VCC
SCL/SDA
500K
ACK
*
*On SDA only
V
CC
75
Ω
75
Ω
28
1
IF Output
IF OutputB
PO
17
vcc
Pump
220 16
15
Drive
vcc
ADD
40K
120K
19
ZL10100 Data Sheet
14 SEMICMF.017
Figure 10 - ZL10100 Evaluation Board Schematic
VCC
C312
2.5pF
D301
BB555
VCC
R303
20K
R304
1K
C306
6.8nF
VCC
VCC
C316
100nF
C330
100nF
L311
4n3H
IF Output B 1
Vee 2
VccRF 3
Vee 4
RF Input B 5
RF Input 6
Vee 7
Vee 8
VccD 9
Vee 10
SCL 11
SDA 12
XTAL 13
XTAL CAP 14
PUMP
15
DRIVE
16
PORT P0
17
Vee
18
ADD
19
Vee
20
VccLO
21
LO B
22
LO
23
VccLO
24
Vee
25
VccLO
26
Vee
27
IF Output
28
IC1
ZL10100
C311
47pF
X301
4MHz
C310
47pF
C301
10pF
C307
33nF
C308
100pF
R307
24K
TR3011
BCW31
R306
22K
C305
100nF
+27V
R305
10R
R308
10R
C300
100nF
C318
100nF
L306
3u9H
L303
3u9H
VCC
C324
100nF
C303
27pF
C302
27pF
L312
10nH
R302
10K
SDA
SCL
XTAL pin (2)
R311
1K
C309
470nF
C342
10pF
C132
10pF
IF Output B / IF Output /
1
2
5
6
4,8
SAW201
EPCOS B1603 SAW Filter
L201
6.8nH
VCC
L202
6.8nH
R200
33R
R201
33R
C201
1pF
R202
300R
R203
300R
IF output pin (14)
IF output pin (15)
Demodulator Input Demodulator Input
From Zarlink SL2101 Up converter
From Zarlink SL2101 Up converter
To Zarlink SL2101 Up converter
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