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TSA5059ATS/C1,118

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
2000 Oct 24 13
Philips Semiconductors Product specification
2.7 GHz I
2
C-bus controlled low phase
noise frequency synthesizer
TSA5059A
Notes
1. Asymmetrical drive on pin RFA or RFB; see Fig.3.
2. Bit PE needs to be set to logic 1 for a frequency higher than 2.3 GHz.
3. The drive level is expected with the crystal at series resonance with a series resistance of 50 Ω. The value will be
different with another crystal.
4. To drive pin XTAL from the pin XT/COMP of another TSA5059A, couple the signal using a capacitor of 1 nF
(to remove the DC level) in series with an 1.2 kΩ resistor (see Fig.5).
XT/COMP output (pin XT/COMP)
V
o(p-p)
AC output voltage (peak-to-peak value) XCE = 1 − 400 − mV
Input/output and output ports (pins P0, P1, P2 and P3)
I
lO
port leakage current port off; V
O
=V
CC
−−10 µA
V
O(sat)
output port saturation voltage port on; I
sink
=10mA − 0.2 0.4 V
V
IL
LOW-level input voltage −−1.5 V
V
IH
HIGH-level input voltage 3.0 −−V
ADC input (pin ADC)
I
LIH
HIGH-level input leakage current V
ADC
=V
CC
−−10 µA
I
LIL
LOW-level input leakage current V
ADC
=0V −10 −−µA
Address selection (pin AS)
I
LIH
HIGH-level input leakage current V
AS
=V
CC
−−1mA
I
LIL
LOW-level input leakage current V
AS
=0V −0.5 −−mA
SCL and SDA inputs (pins SCL and SDA)
V
IL
LOW-level input voltage −−1.5 V
V
IH
HIGH-level input voltage 2.3 −−V
I
LIH
HIGH-level input leakage current V
IH
= 5.5 V
V
CC
= 5.5 V −−10 µA
V
CC
=0V −−10 µA
I
LIL
LOW-level input leakage current V
IL
=0V; V
CC
= 5.5 V −10 −−µA
f
SCL
SCL clock frequency −−400 kHz
SDA output (pin SDA)
V
O(ack)
output voltage during acknowledge I
sink
=3mA −−0.4 V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
2000 Oct 24 14
Philips Semiconductors Product specification
2.7 GHz I
2
C-bus controlled low phase
noise frequency synthesizer
TSA5059A
handbook, full pagewidth
−18
−24
−6
−12
0
+6
−30
−36
−42
−48
−54
−60
500 1000 1500 2000 2500 3000
Guaranteed area
V
i(RF)
(dBm)
f (MHz)
FCE416
Fig.3 Sensitivity curve.
2000 Oct 24 15
Philips Semiconductors Product specification
2.7 GHz I
2
C-bus controlled low phase
noise frequency synthesizer
TSA5059A
APPLICATION INFORMATION
An example of a typical application is given in Fig.4. In this application the VCO centre frequency is 1.5 GHz with a slope
of 100 MHz/V. The expected loop bandwidth is 10 kHz with a charge pump current of 555 µA and f
comp
of 250 kHz. Filter
components need to be adapted to each application depending on the VCO characteristics and the required performance
of the loop.
handbook, full pagewidth
TSA5059A
FCE714
1
DRIVE
BC847
GND
RFB
RFA
V
CC
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
AS
XT/COMP
XTAL
CP
SDA
SCL
P3
P2
P1
P0
ADC
2.2 nF
10 nF
1 nF
1 nF
3.9 kΩ
2.7 kΩ
5 V
33 V
27 kΩ
18 pF
1 nF
tuning
voltage
VCO
output
VCO
MICRO-
CONTROLLER
47 nF
4 MHz
Fig.4 Typical application.
Loop bandwidth
Most of the applications the TSA5059A are dedicated for
require a large loop bandwidth, in the order of a few kHz to
a few tens of kHz. The calculation of the loop filter
elements has to be done for each application, while it
depends on the VCO slope and phase noise as well as the
reference frequency and charge pump current.
A simulation of the loop can easily be done by using the
SIMPATA software from Philips.
Reference source
The TSA5059A is well suited to be used with a 4 MHz
crystal connected to pin XTAL. Philips crystal ordering
code 4322 143 04093 is recommended in this case.
It is however possible to use a crystal with an higher
frequency (up to 16 MHz) to improve the noise
performance. When choosing a crystal, one should take
notice to select a crystal able to withstand the drive level of
the TSA5059A without suffering from accelerated ageing.
It is also possible to feed pin XTAL with an external signal
between 2 and 20 MHz, coming from an external oscillator
or from the pin XT/COMP of another TSA5059A, when
more than one synthesizer is present in the same
application. Then the application given in Fig.5 should be
used.
If the signal at pin XT/COMP is not used in an application
the output should be switched off (XCE = 0 and XCS = 0).
This pin should then be left open.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

TSA5059ATS/C1,118

Mfr. #:
Buy TSA5059ATS/C1,118
Manufacturer:
NXP Semiconductors
Description:
IC SYNTH FREQ 2.7GHZ 16-SSOP
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New from this manufacturer.
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