TSA5059A Datasheet PDF - NXP Semiconductors
| Part Number | TSA5059A | |
| Description | 2.7 GHz I2C-bus controlled low phase noise frequency synthesizer | |
| Manufacturers | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TSA5059A
2.7 GHz I2C-bus controlled low
phase noise frequency synthesizer
Product specification
Supersedes data of 2000 Sep 19
File under Integrated Circuits, IC02
2000 Oct 24
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Philips Semiconductors
2.7 GHz I2C-bus controlled low phase
noise frequency synthesizer
Product specification
TSA5059A
PINNING
SYMBOL
CP
XTAL
XT/COMP
AS
SDA
SCL
P3
P2
P1
P0
ADC
VCC
RFA
RFB
GND
DRIVE
PIN DESCRIPTION
1 charge pump output
2 crystal oscillator input
3 fxtal or fcomp signal output
4 I2C-bus address selection input
5 I2C-bus serial data input/output
6 I2C-bus serial clock input
7 general purpose output Port 3
8 general purpose input/output Port 2
9 general purpose input/output Port 1
10 general purpose input/output Port 0
11 analog-to-digital converter input
12 supply voltage
13 RF signal input A
14 RF signal input B
15 ground supply
16 external NPN drive output
handbook, halfpage
CP 1
XTAL 2
XT/COMP 3
16 DRIVE
15 GND
14 RFB
AS 4
13 RFA
TSA5059A
SDA 5
12 VCC
SCL 6
11 ADC
P3 7
10 P0
P2 8
9 P1
FCE713
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The TSA5059A contains all the necessary elements but a
reference source, a loop filter and an external NPN
transistor to control a varicap tuned local oscillator forming
a phase locked loop frequency synthesized source. The IC
is designed in a high speed process with a fast phase
detector to allow a high comparison frequency to reach a
low phase noise level on the oscillator.
The block diagram is shown in Fig.1. The RF signal is
applied at pins RFA and RFB. Thanks to the input
preamplifier a good sensitivity is provided. The output of
the preamplifier is fed to the 17-bit programmable divider
either through a divide-by-two prescaler or directly.
Because of the internal high speed process, the RF divider
is working for a frequency up to 2.3 GHz, without the need
for the divide-by-two prescaler to be used. This prescaler
is needed for frequencies above 2.3 GHz.
The output of the 17-bit programmable divider fDIV is fed
into the phase comparator, where it is compared in both
phase and frequency with the comparison frequency fcomp.
This frequency is derived from the signal present at
pin XTAL, fxtal, divided down in the reference divider. It is
possible either to connect a quartz crystal to pin XTAL and
then using the on-chip crystal oscillator, or to feed this pin
with a reference signal from an external source.
The reference divider can have a dividing ratio selected
from 16 different values between 2 and 320 (see Table 8).
The output of the phase comparator drives the
charge pump and the loop amplifier section. This amplifier
requires the use of an external NPN transistor. Pin CP is
the output of the charge pump, and pin DRIVE is the pin to
connect the base of the external transistor. This transistor
has its emitter grounded and the collector drives the tuning
voltage to the varicap diode of the Voltage Controlled
Oscillator (VCO). The loop filter has to be connected
between pin CP and the collector of the external NPN
transistor.
In addition, it is possible to drive another PLL synthesizer,
or the clock input of a digital demodulation IC, from
pin XT/COMP. It is possible to select by software either
fxtal, the crystal oscillator frequency or fcomp, the frequency
present after the reference divider at this pin. It is also
possible to switch off this output, in case it is not used.
For test and alignment purposes, it is possible to release
the drive output to be able to apply an external voltage on
it, to select one of the three charge pump test modes, and
to monitor half the fDIV at Port P0. See Table 10 for all
possible modes.
Four open-collector output ports are provided on the IC for
general purpose; three of these can also be used as input
ports. A 3-bit ADC is also available.
The TSA5059A is controlled via the two-wire I2C-bus.
For programming, there is one 7-bit module address and
bit R/W for selecting READ or WRITE mode.
2000 Oct 24
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TSA5059A electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TSA5059A.PDF Datasheet ] | |
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