Radio tuning PLL frequency synthesizer

Radio tuning PLL frequency synthesizer
INTEGRATED CIRCUITS
DATA SHEET
SAA1057
Radio tuning PLL frequency
synthesizer
Product specification
File under Integrated Circuits, IC01
November 1983
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
• On-chip programmable current amplifier (charge pump)
to adjust the loop gain.
GENERAL DESCRIPTION
The SAA1057 is a single chip frequency synthesizer IC in
I2L technology, which performs all the tuning functions of a
PLL radio tuning system. The IC is applicable to all types
of radio receivers, e.g. car radios, hi-fi radios and portable
radios.
• Only one reference frequency for both AM and FM.
• High signal purity due to a sample and hold phase
detector for the in-lock condition.
• High tuning speed due to a powerful digital memory
phase detector during the out-lock condition.
Features
• On-chip prescaler with up to 120 MHz input frequency.
• Tuning steps for AM are: 1 kHz or 1,25 kHz for a VCO
frequency range of 512 kHz to 32 MHz.
• On-chip AM and FM input amplifiers with high sensitivity
(30 mV and 10 mV respectively).
• Tuning steps for FM are: 10 kHz or 12,5 kHz for a VCO
frequency range of 70 MHz to 120 MHz.
• Low current drain (typically 16 mA for AM and 20 mA for
FM) over a wide supply voltage range (3,6 V to 12 V).
• Serial 3-line bus interface to a microcomputer.
• Test/features.
• On-chip amplifier for loop filter for both AM and FM
(up to 30 V tuning voltage).
QUICK REFERENCE DATA
Supply voltage ranges
VCC1
3,6 to 12
V
VCC2
3,6 to 12
V
VCC3
VCC2 to 31
V
ICC1 + ICC2
typ.
18
mA
ICC3
typ.
0,8
mA
at pin FAM
fFAM
512 kHz to 32
MHz
at pin FFM
fFFM
70 to 120
MHz
Maximum crystal input frequency
fXTAL
>
MHz
Operating ambient temperature range
Tamb
−25 to + 80
Supply currents
Input frequency ranges
PACKAGE OUTLINE
18-lead DIL; plastic (SOT102H); SOT102-1; 1996 September 2.
November 1983
2
4
°C
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
Fig.1 Block diagram.
November 1983
3
SAA1057
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
GENERAL DESCRIPTION
The SAA1057 performs the entire PLL synthesizer function (from frequency inputs to tuning voltage output) for all types
of radios with the AM and FM frequency ranges.
The circuit comprises the following:
• Separate input amplifiers for the AM and FM VCO-signals.
• A divider-by-10 for the FM channel.
• A multiplexer which selects the AM or FM input.
• A 15-bit programmable divider for selecting the required frequency.
• A sample and hold phase detector for the in-lock condition, to achieve the high spectral purity of the VCO signal.
• A digital memory frequency/phase detector, which operates at a 32 times higher frequency than the sample and hold
phase detector, so fast tuning can be achieved.
• An in-lock counter detects when the system is in-lock. The digital phase detector is switched-off automatically when
an in-lock condition is detected.
• A reference frequency oscillator followed by a reference divider. The frequency is generated by a 4 MHz quartz crystal.
The reference frequency can be chosen either 32 kHz or 40 kHz for the digital phase detector (that means 1 kHz and
1,25 kHz for the sample and hold phase detector), which results in tuning steps of 1 kHz and 1,25 kHz for AM, and 10
kHz and 12,5 kHz for FM.
• A programmable current amplifier (charge pump), which controls the output current of both the digital and the
sample/hold phase detector in a range of 40 dB. It also allows the loop gain of the tuning system to be adjusted by the
microcomputer.
• A tuning voltage amplifier, which can deliver a tuning voltage of up to 30 V.
• BUS; this circuitry consists of a format control part, a 16-bit shift register and two 15-bit latches. Latch A contains the
to be tuned frequency information in a binary code. This binary-coded number, multiplied by the tuning spacing, is
equal to the synthesized frequency. The programmable divider (without the fixed divide-by-10 prescaler for FM) can
be programmed in a range between 512 and 32 767 (see Fig.3). Latch B contains the control information.
November 1983
4
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
OPERATION DESCRIPTION
Control information
The following functions can be controlled with the data word bits in latch B. For data word format and bit position see
Fig.3.
FM
FM/AM selection; ‘1’ = FM, ‘0’ = AM
REFH
reference frequency selection; ‘1’ = 1,25 kHz, ‘0’ = 1 kHz (sample and hold phase detector)
CP3
CP2
CP1
control bits for the programmable current amplifier (see section Characteristics)
CP0
SB2
enables last 8 bits (SLA to T0) of data word B;
‘1’ = enables, ‘0’ = disables; when programmed ‘0’, the last 8 bits of data word B will be set to ‘0’
automatically
SLA
load mode of latch A; ‘1’ = synchronous, ‘0’ = asynchronous
PDM1
PDM0
phase detector mode
PDM1
PDM0
DIGITAL PHASE DETECTOR
0
X
automatic on/off
1
0
on
1
1
off
BRM
bus receiver mode bit; in this mode the supply current of the BUS receiver will be switched-off
automatically after a data transmission (current-draw is reduced); ‘1’ = current switched; ‘0’ = current
always on
T3
test bit; must be programmed always ‘0’
T2
test bit; selects the reference frequency (32 or 40 kHz) to the TEST pin
T1
test bit; must be programmed always ‘0’
T0
test bit; selects the output of the programmable counter to the TEST pin
T3
November 1983
T2
T1
T0
TEST (PIN 18)
0
0
0
0
1
0
1
0
0
reference frequency
0
0
0
1
output programmable counter
0
1
0
1
output in-lock counter
‘0’ = out-lock
‘1’ = in-lock
5
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
(1) During the zero set-up time (tLZsu) CLB can be LOW or HIGH, but no transient of the signal is permitted. This can be of use when an I2C bus is
used for other devices on the same data and clock lines.
Fig.2 BUS format.
Fig.3 Bit organization of data words A and B.
November 1983
6
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
PINNING
1
TR
2
TCA
3
TCB
4
DCS
decoupling of supply
5
IN
input of output amplifier
6
OUT
output of output amplifier
7
VCC3
positive supply voltage of output
amplifier
8
FFM
FM signal input
9
VCC1
positive supply voltage of high frequency
logic part
10
DCA
decoupling of input amplifiers
11
FAM
AM signal input
12
DATA
13
DLEN
14
CLB
15
VEE
ground
16
VCC2
positive supply voltage of low frequency
logic part and analogue part
17
XTAL
reference oscillator input
18
TEST
test output
November 1983
resistor/capacitors for sample and hold
circuit
BUS
Fig.4 Pinning diagram.
7
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Supply voltage; logic and analogue part
VCC1; VCC2
−0,3 to 13,2
V
Supply voltage; output amplifier
VCC3
VCC2 to +32
V
Total power dissipation
Ptot
max. 800
mW
Operating ambient temperature range
Tamb
−30 to +85
°C
Storage temperature range
Tstg
−65 to +150
°C
CHARACTERISTICS
VEE = 0 V; VCC1 = VCC2 = 5 V; VCC3 = 30 V; Tamb = 25 °C; unless otherwise specified
SYMBOL MIN.
TYP.
MAX.
12
CONDITIONS
VCC1
3,6
5
VCC2
3,6
5
12
V
VCC3
VCC2
−
31
V
AM mode
Itot
−
16
−
mA
FM mode
Itot
−
20
−
mA
Itot = ICC1 + ICC2 in-lock:
BRM = ‘1’; PDM = ‘0’
ICC3
0,3
0,8
1,2
mA
IOUT = 0
Tamb
−25
−
+80
°C
AM input frequency
fFAM
512 kHz
−
32
MHz
FM input frequency
fFFM
70
−
120
MHz
Input voltage at FAM
Vi (rms)
30
−
500
mV
Input voltage at FFM
Vi (rms)
10
−
500
mV
Input resistance at FAM
Ri
−
2
−
kΩ
Input resistance at FFM
Ri
−
135
−
Ω
Input capacitance at FAM
Ci
−
3,5
−
pF
Input capacitance at FFM
Ci
−
3
−
pF
Vs/Vns
−
−30
−
dB
Supply voltages
V
Supply currents(6)
Operating ambient
temperature
RF inputs (FAM, FFM)
Voltage ratio allowed
between selected and
non-selected input
see note 1
Crystal oscillator (XTAL)
Maximum input frequency
fXTAL
4
−
−
MHz
Crystal series resistance
Rs
−
−
150
Ω
VIL
0
−
0,8
V
BUS inputs (DLEN, CLB, DATA)
Input voltage LOW
Input voltage HIGH
VIH
2,4
−
VCC1
V
Input current LOW
−IIL
−
−
10
µA
VIL = 0,8 V
Input current HIGH
IIH
−
−
10
µA
VIH = 2,4 V
November 1983
8
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SYMBOL MIN.
SAA1057
TYP.
MAX.
CONDITIONS
see also Fig.2 and
BUS inputs timing
(DLEN, CLB, DATA)
note 2
tCLBlead
1
−
−
µs
tTlead
0,5
−
−
µs
tCLBlag1
5
−
−
µs
CLB pulse width HIGH
tCLBH
5
−
−
µs
CLB pulse width LOW
tCLBL
5
−
−
µs
tDATAlead
2
−
−
µs
Hold time for DATA to CLB
tDATAhold
0
−
−
µs
Hold time for DLEN to CLB
tDLENhold
2
−
−
µs
tCLBlag2
2
−
−
µs
tDIST
5
−
−
µs
asynchronous mode
tDIST
0,3
−
−
ms
synchronous mode
tDIST
1,3
−
−
ms
Lead time for CLB to DLEN
Lead time for DATA to
the first CLB pulse
Set-up time for DLEN
to CLB
Set-up time for DATA
to CLB
Set-up time for DLEN to
CLB load pulse
Busy time from load pulse
to next start of transmission
Busy time
next transmission after
word ‘B’ to other device
or
next transmission to
SAA1057 after word
‘A’ (see also note 5)
Sample and hold circuit
(TR, TCA, TCB)
see also notes 3; 4
Minimum output voltage
VTCA,
VTCB
−
1,3
−
V
Maximum output voltage
VTCA,
VTCB
−
−
VCC2−0,7
V
Capacitance at TCA
CTCA
−
−
2,2
nF
CTCA
−
−
2,7
nF
REFH = ‘0’
tdis
−
−
5
µs
REFH = ‘1’
tdis
−
−
6,25
µs
REFH = ‘0’
RTR
100
−
−
Ω
external
VTR
−
0,7
−
V
Capacitance at TCB
CTCB
−
−
10
nF
external
Bias current into TCA, TCB
Ibias
−
−
10
nA
in-lock
(external)
Discharge time at TCA
Resistance at TR
REFH = ‘1’
Voltage at TR during
discharge
November 1983
9
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
SYMBOL MIN.
TYP.
MAX.
± Idig
−
0,4
−
CONDITIONS
Programmable current amplifier
(PCA)
Output current of the
dig. phase detector
mA
Current gain of PCA
CP3
CP2
CP1
CP0
P1
0
0
0
0
GP1
−
0,023
−
P2
0
0
0
1
GP2
−
0,07
−
P3
0
0
1
0
GP3
−
0,23
−
P4
0
1
1
0
GP4
−
0,7
−
P5
1
1
1
0
GP5
−
2,3
−
STCB
−
1,0
−
µA/V
∆VTCB
−
−
1
V
in-lock
VIN
−
1,3
−
V
in-lock; equal to
internal reference
voltage
minimum
VOUT
−
−
0,5
V
−IOUT = 1 mA
maximum
VOUT
VCC3−2
−
−
V
IOUT = 1 mA
VCC2 ≥ 5 V (only for P1)
Ratio between the output
current of S/H into PCA
and the voltage on
CTCB
Offset voltage on TCB
Output amplifier (IN, OUT)
Input voltage
Output voltages
VOUT
VCC3−1
−
−
V
IOUT = 0,1 mA
± IOUT
5
−
−
mA
VOUT = 1⁄2 VCC3
Output voltage LOW
VTL
−
−
0,5
V
Output voltage HIGH
VTH
−
−
12
V
Output current OFF
IToff
−
−
10
µA
VTH
Output current ON
ITon
150
−
−
µA
VTL
∆VCC1/∆VOUT
−
77
−
dB
∆VCC2/∆VOUT
−
70
−
dB
∆VCC3/∆VOUT
−
60
−
dB
maximum
Maximum output current
Test output (TEST)(7)
Ripple rejection(8)
at fripple = 100 Hz
November 1983
10
VOUT ≤ VCC3−3 V
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
Notes
1. Pin 17 (XTAL) can also be used as input for an external clock.
The circuit for that is given in Fig.5. The values given in Fig.5 are a typical application example.
2. See BUS information in section ‘operation description’.
3. The output voltage at TCB and TCA is typically 1⁄2 VCC2+0,3 when the tuning system is in-lock via the sample and
hold phase detector. The control voltage at TCB is defined as the difference between the actual voltage at TCB and
the value calculated from the formula 1⁄2 VCC2+0,3 V.
4. Crystal oscillator frequency fXTAL = 4 MHz.
5. The busy-time after word “A” to another device which has more clock pulses than the SAA1057 (>17) must be the
same as the busy-time for a next transmission to the SAA1057.
When the other device has a separate DLEN or has less clock pulses than the SAA1057 it is not necessary to keep
to this busy-time, 5 µs will be sufficient.
6. When the bus is in the active mode (see BRM in Control Information), 4,5 mA should be added to the figures given.
7. Open collector output.
8. Measured in Fig.6.
Fig.5 Circuit configuration showing external 4 MHz clock.
APPLICATION INFORMATION
Initialize procedure
Either a train of at least 10 clock pulses should be applied to the clock input (CLB) or word B should be transmitted, to
achieve proper initialization of the device.
For the complete initialization (defining all control bits) a transmission of word B should follow. This means that the IC is
ready to accept word A.
Synchronous/asynchronous operation
Synchronous loading of the frequency word into the programmable counter can be achieved when bit ‘SLA’ of word B is
set to ‘1’. This mode should be used for small frequency steps where low tuning noise is important (e.g. search and
manual tuning). This mode should not be used for frequency changes of more than 31 tuning steps. In this case
asynchronous loading is necessary. This is achieved by setting bit ‘SLA’ to ‘0’. The in-lock condition will then be reached
more quickly, because the frequency information is loaded immediately into the divider.
November 1983
11
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
Restrictions to the use of the programmable current amplifier
The lowest current gain (0,023) must not be used in the in-lock condition when the supply voltage VCC2 is below 5 V (CP3,
CP2, CP1 and CP0 are all set to ‘0’). This is to avoid possible instability of the loop due to a too small range of the sample
and hold phase detector in this condition (see also section ‘Characteristics’).
Transient times of the bus signals
When the SAA1057 is operating in a system with continuous activity on the bus lines, the transient times at the bus inputs
should not be less than 100 ns. Otherwise the signal-to-noise ratio of the tuning voltage is reduced.
BUS
(1) Values depend on the tuner diode characteristics.
Fig.6 Application example of the SAA1057PLL frequency synthesizer module.
November 1983
12
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
PACKAGE OUTLINE
DIP18: plastic dual in-line package; 18 leads (300 mil)
SOT102-1
ME
seating plane
D
A2
A
A1
L
c
e
Z
w M
b1
(e 1)
b
b2
MH
10
18
pin 1 index
E
1
9
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
min.
A2
max.
b
b1
b2
c
D (1)
E (1)
e
e1
L
ME
MH
w
Z (1)
max.
mm
4.7
0.51
3.7
1.40
1.14
0.53
0.38
1.40
1.14
0.32
0.23
21.8
21.4
6.48
6.20
2.54
7.62
3.9
3.4
8.25
7.80
9.5
8.3
0.254
0.85
inches
0.19
0.020
0.15
0.055
0.044
0.021
0.015
0.055
0.044
0.013
0.009
0.86
0.84
0.26
0.24
0.10
0.30
0.15
0.13
0.32
0.31
0.37
0.33
0.01
0.033
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
93-10-14
95-01-23
SOT102-1
November 1983
EUROPEAN
PROJECTION
13
Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (Tstg max). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
Soldering by dipping or by wave
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
November 1983
14
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