SP5070 [MITEL]
2.GHz Fixed Modulus Frequency Synthesiser; 2.GHz固定模数频率合成器
| 型号： | SP5070 |
| 厂家： | 
MITEL NETWORKS CORPORATION |
| 描述： | 2.GHz Fixed Modulus Frequency Synthesiser |
| 文件： | 总7页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SP5070
2.GHz Fixed Modulus Frequency Synthesiser
DS3966-2.2 May 996
The SP5070 is a single modulus frequency synthesiser
for use in Satellite TV receivers and together with an
appropriate voltage controlled oscillator (VCO), forms a
complete phase locked loop (PLL) synthesiser. The circuit
consists of a prescaler with preamplifier and a fixed modulus
divider. The phase comparator is fed with a reference
frequency derived from an external oscillator or crystal. The
comparator has a charge pump output amplifier stage
around which feedback may be applied. Only an external
transistor is required for varicap line driving.
14
13
12
VCC
RF INPUT
RF INPUT
NC
TEST 1
1
2
3
4
TEST 2
NC
SP5070 11
CPDIS
10
REF IN/CRYSTAL
OSCILLATOR CAPACITOR
5
6
7
NC
FEATURES
VEE
9
8
■ Low Power Consumption (5V, 47mA typ.)
■ Prescaler and Preamplifier Included
■ Charge Pump Amplifier with Feedback Point
■ Charge Pump Disable Facility
■ Synthesises Frequencies up to 2.4GHz
■ Pin and Function Compatible with SP5060 and
SP5062
DRIVE OUTPUT
CHARGE PUMP
DP14
14
13
12
TEST 1
VCC
RF INPUT
RF INPUT
NC
1
TEST 2
2
3
NC
SP5070F
CPDIS
4
5
6
7
11
■ Full ESD Protection*
* Normal ESD handling procedures should be observed.
10
9
REF IN/CRYSTAL
OSCILLATOR CAPACITOR
NC
VEE
APPLICATIONS
■ Satellite TV
DRIVE OUTPUT
8
CHARGE PUMP
■ High IF Cable Tuning Systems
■ C-Band with Frequency Doubling Mixer
MP14
Fig.1 Pin connections - top view
ORDERING INFORMATION
SP5070 DP
- (14 Lead Plastic Package)
SP5070F MP
- (14 Lead Miniature Plastic Package)
8
2
RF IN
FIXED
PRESCALER
PUMP
DRIVE
MODULUS
DIVIDER
¸ 8192
PRE
AMP
3
RF IN
¸ 32
FDIV
7
CHARGE
PUMP
PHASE
FCOMP
REFERENCE
DIVIDER
¸ 1024
1
V
CC
OUTPUT
BUFFER
6
V
EE
13
9
10
14
11
OSCILLATOR REF IN/
CAPACITOR
TEST 1 TEST 2
CPDIS
CRYSTAL
Fig.2 Block diagram of SP5070
SP5070
ELECTRICAL CHARACTERISTICS
Tamb = -40°C to +85°C,VCC = +4.5V to +5.5V. These characteristics are guaranteed by either production test or design.
They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated.
Value
Typ
Characteristics
Supply current
Symbol
Pin
Units
Conditions
VCC = 5V
Min
Max
ICC
1
-
47
55
mA
Prescaler input voltage
Prescaler input voltage
2,3
2,3
50
100
-
-
300
300
mVRMS 300MHz to 1.8GHz sinewave
mVRMS 2.4GHz, see Fig.5
Prescaler input impedance
Input capacitance
2,3
2,3
-
-
50
2
-
-
W
pF
Charge pump output current
Charge pump output leakage
Drift due to leakage
8
8
-
-
-
-
±100
-
-
-
±5
5
µA
nA
mV/s
V pin 8 = 2.0V
V pin 8 = 2.0V
At collector of External
Varicap Drive transistor
Charge pump drive output
current
1
-
-
-
-
mA
-
V pin 7 = 0.7V
7
-
Charge pump amplifier gain
6400
pin 7 current 100µa
Oscillator temperature stability
Oscillator stability with
supply voltage
9,10
9,10
-
-
-
-
2
2
ppm/°C
ppm/V
Reference clock frequency
External reference amplitude
10
10
2
150
-
-
10
500
MHz
mVRMS
Charge pump disable/TEST 1
and TEST 2/enable
11
-250
-
-
-
-500
10
µA
µA
VIN<0V
V pin 11= VCC
Charge pump disable leakage
11
TEST 1/TEST 2 sink current
TEST 1/TEST 2 leakage current
TEST 1/TEST 2 voltage
13,14
13,14
13,14
1
-
-
-
-
-
mA
µA
V
VOUT = 0.7V
10
VOUT = VCC+0.3V
-
VCC+0.3
ABSOLUTE MAXIMUM RATINGS
All voltages are referred to VEE = 0V
Value
Characteristics
Pin
Units
Max
Min
Supply voltage
1
-0.3
-
7
V
Vp-p
V
RF input voltage
2,3
2.5
RF input DC offset
2,3
-0.3
-0.3
-0.7
-0.3
-0.3
-0.3
-55
-
VCC+0.3
VCC+0.3
VCC+0.3
VCC+0.3
VCC+0.3
VCC+0.3
150
Charge pump DC offset
Charge pump disable
8
V
11
V
Drive DC offset
7
V
Crystal oscillator DC offset
TEST outputs
9,10
V
13,14
V
Storage temperature
-
-
-
-
-
-
-
°C
Junction temperature
+150
78
°C
DP14 thermal resistance, chip-to-ambient
DP14 thermal resistance, chip-to-case
MP14 thermal resistance, chip-to-ambient
MP14 thermal resistance, chip-to-case
Power consumption at 5.5V
-
°C/W
°C/W
°C/W
°C/W
mW
-
30
-
123
-
45
-
275
2
SP5070
FUNCTIONAL DESCRIPTION
The SP5070, when used with a voltage controlled
oscillator, forms a complete phase locked loop frequency
synthesiser.
A single external transistor, driven from the charge
pump output, provides the output drive necessary for the
oscillator varicap line.
The phase comparator comparison frequency is
obtained by dividing the reference frequency. This may be
generated on-chip by means of an external crystal, or from
an external reference oscillator.
The output of the prescaler is divided by the fixed
modulus divider, producing an output frequency which is
phased locked to the comparison frequency.
The divider stages are arranged to give a fixed ratio
between the synthesised frequency and the reference of
256:1. Any frequency within the range of 300MHz to 2.4GHz
may be achieved by using the appropriate reference or
crystal frequency.
A test facility which disables the charge pump is also
provided. This is activated when a negative voltage is
applied to pin 11, see electrical characteristics above. When
the device is in this mode, FCOMP and FDIV are also available
at outputs TEST1 and TEST2 respectively. These are open
collector outputs and are each capable of sinking a minimum
of 1mA. In normal mode of operation these outputs are high
impedance.
For compatibility with SP5060/SP5062, pin 11 may be
connected toVCC
+5V
14
13
1
2
3
4
5
6
7
1n
1n
FROM
VCO
S
P
5
0
7
0
12
11
10
4MHz
REFERENCE
CRYSTAL
9
8
68p
47P
180n
+30V
47n
22K
22K
VARICAP
VCO
INPUT
47K
10n
10K
2N3904
Fig.3 Typical application and test circuit (1024MHz with 4MHz reference crystal)
+5V
14
13
1
2
3
4
1n
1n
FROM
VCO
S
P
5
0
7
0
12
11
10
100p
+30V
FROM
REFERENCE
OSCILLATOR
5
6
7
9
8
180n
DP
47n
22K
22K
VARICAP
VCO
INPUT
47K
10K
2N3904
10n
Fig.4 Application using external reference oscillator
3
SP5070
S
:Z = 50Ω
0
FREQUENCY MARKER
STEP = 500MHz
11
Fig.5 Typical input sensitivity
Fig.6 Typical input impedance
RF input
Loop amplifier
Reference oscillator
TEST 1and TEST 2 outputs
Fig.7 SP5070 input/output interface circuits
4
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