SL6679 [MITEL]
Direct Conversion FSK Data Receiver; 直接转换FSK数据接收
| 型号： | SL6679 |
| 厂家： | 
MITEL NETWORKS CORPORATION |
| 描述： | Direct Conversion FSK Data Receiver |
| 文件： | 总23页 (文件大小：373K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SL6679
Direct Conversion FSK Data Receiver
Preliminary Information
Supersedes September 1996 version, DS4410 - 1.5
DS4410 - 2.1 April 1998
The SL6679 is an advanced Direct Conversion FSK Data
Receiver for operation up to 450 MHz. The device integrates all
functions to convert a binary FSK modulated RF signal into a
demodulated data stream.
Adjacent channel rejection is provided using tuneable gyrator
filters. RF and audio AGC functions assist operation when large
interfering signals are present and an automatic frequency control
(AFC) function is provided to extend centre frequency acceptance.
32 31 30 29 28 27 26 25
1
2
3
4
5
6
7
8
IRF
GND
MIXIP A
MIX DEC
MIXIP B
REG CNT
24
23
22
21
20
19
18
17
AFC1
BATT FLAG
V
2
CC
FEATURES
■ Very Low Power Operation from Single Cell
■ Superior Sensitivity
■ Operation at 512, 1200 and 2400 Baud
■ On Chip 1 Volt Regulator
DATA OP
BEC
SL6679
AFC OP
V
REF
TPQ
V
REG
TPI
9
10 11 12 13 14 15 16
■ 1mm Height Miniature Package
■ Automatic Frequency Control Function
■ Programmable Post Detection Filter
■ AGC Detection Circuitry
TP32
Fig. 1 Pin identification diagram (top view). See Table 1 for
pin descriptions
■ Power Down Function
■ Battery Strength Indicator
APPLICATIONS
■ Pagers, including Credit Card, PCMCIA and
Watch Pagers
■ Low Data Rate Receivers, e.g. Security Systems
ABSOLUTE MAXIMUM RATINGS
Storage temperature
Operating temperature
Maximum voltage on any pin w.r.t. any
other pin, subject to the following conditions:
Current, pin 3 (MIXIP), pin 5 (MIXPB),
pin 12 (LOIPI) and pin 14 (LOIPB)
Most negative voltage on any pin
255°C to1150°C
210°C to155°C
14V
ORDERING INFORMATION
SL6679/KG/TP1N 1mm TQFP device, baked and dry
packed, supplied in trays
<5ma
SL6679/KG/TP1Q 1mm TQFP device, baked and dry
20·5V w.r.t. gnd
packed, supplied in tape and reel
12
9
10 13
7
6
8
29
4
20
11
22
2
18
−
+
MIX
DEC
BEC
V 1
CC
V 2
CC
GND V
REF
1·0V
3
5
26
27
21
4
f
MIXER
LIMITER
DETECTOR
LIMITER
31
30
−
+
1·08V
19
AFC
14
15 16 28
23 17
1
32
24 25
Fig. 2 Block diagram of SL6679
SL6679
Pin name
IRF
Pin description
Pin number
1
LNA current source
Ground
2
GND
3
MIXIP A
MIX DEC
MIXIP B
REG CNT
VREG
TPI
Mixer input A
4
Mixer biasing decouple
Mixer input B
5
6
1V regulator control external PNP drive
1V regulator output voltage
I channel pre-gyrator filter test point.
Mixer output, I channel
7
8
9
I1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
I2
Mixer output, I channel
VCC1
Positive supply 1
LOIP I
GYRI
LO input channel I
Gyrator current adjust pin
LO input channel Q
LOIP Q
Q1
Mixer output, Q channel
Q2
Mixer output, Q channel
TPQ
Q channel pre-gyrator filter test point
Reference voltage
VREF
AFC OP
BEC
AFC output
Battery economy control
DATA OP
VCC2
Data output pin
Positive supply 2
BATT FLAG
AFC1
Battery flag output
AFC characteristic defining pin
AFC characteristic defining pin
Bit rate filter control
AFC2
BRF CNT
BRF1
Bit rate filter 1, output from detector
Battery flag input voltage
I channel limiter (post gyrator filter) test point, output only
Audio AGC output current
Audio AGC time constant adjust
Audio AGC gain and threshold adjust. RSSI signal indicator
VBATT
TP LIM I
IAGC OP
TC ADJ
GTH ADJ
Table 1 SL6679 pin descriptions
2
SL6679
ELECTRICAL CHARACTERISTICS (1)
Electrical Characteristics (1) are guaranteed over the following range of operating conditions unless otherwise stated
TAMB = 125°C, VCC1 = 1·3V, VCC2 = 2·7V
Value
Characteristic
Pin
Units
Conditions
Typ.
Max.
Min.
Supply voltage, VCC
Supply voltage, VCC2
Supply current, ICC1
1
11
22
11
22
7
7
1
18
18
18
1·3
2·7
1·60
390
1·0
2·7
3·5
2·2
490
1·05
3
700
1·31
20
V
V
mA
µA
V
mA
µA
V
µA
µA
VCC1<VCC220·8V
Including IRF
0·95
1·9
1·20
260
0·95
0·25
375
1·15
Supply current, ICC2
1 volt regulator, VREG
1 volt regulator load current
LNA current source, IRF
Reference voltage, VREF
VREF source current
ILOAD = 3mA, external PNP(b>100, VCE = 0·1V)
External PNP (hFE>100, VCE = 0·1V)
PTAT, voltage on pin 1 = 0·3V and 1·3V
Typical temperature coefficient = 10·1mV/°C
500
1·25
VREF sink current
1·0
Data Amplifier
DATA OP sink current
DATA OP leakage current
Output mark:space ratio
21
21
21
µA
µA
Output logic low, pin 21 voltage = 0·3V
Output logic high, pin 21 voltage = VCC2
Preamble at 1200 baud, Df = 4kHz,
pin 26 = 0V, BRF capacitor = 560pF,
DATA OP pullup resistor = 200kΩ
25
1·0
9:7
7:9
Battery Economy
Power down ICC1
Power down ICC2
BEC input logic high
BEC input logic low
BEC input current
BEC input current
11
22
20
20
20
20
0·5
2·0
10
10
µA
µA
V
V
µA
µA
Pin 20 = logic low
Pin 20 = logic low
Powered up
Powered down
Powered up
VCC2
V
CC220·3V
0·3
1·0
1·0
0
21·0
21·0
Powered down
Battery Flag
V
BATT trigger point
28
23
23
23
28
28
28
1·08
1·12
1·0
V
Current sunk by pin 23 = 1µA
Pin 28 voltage = 1·04V
Pin 28 voltage = 1·12V
Pin 28 voltage = 1·14V
1·04
BATT FLAG sink current
BATT FLAG sink current
BATT FLAG sink current
µA
µA
µA
V
µA
µA
1·0
25
VBATT input voltage
VBATT input current
VBATT input current
2·0
1·0
1·0
VBATT = 1·14V
BATT = 1·04V
21·0
21·0
V
Continued…
3
SL6679
ELECTRICAL CHARACTERISTICS (1) (Cont.)
Electrical Characteristics (1) are guaranteed over the following range of operating conditions unless otherwise stated
TAMB = 125°C, VCC1 = 1·3V, VCC2 = 2·7V
Value
Characteristic
Pin
Units
Conditions
Max.
Typ.
Min.
Mixers
LO DC bias voltage
Gain to TPI
12,14
3,5,8,12
V
dB
V
42
CC1
LO inputs (12, 14) driven in quadrature:
45mVrms at 450MHz, CW.
38
46
Mixer inputs (3, 5) driven differentially:
0·45mVrms at 450·004MHz, CW.
As gain to TPI
Gain to TPQ
3,5,14,
17
3,5,8,
12,14,17
dB
dB
38
42
0
46
Match of gain to TPI
and TPQ
As gain toTPI
21
11
Audio AGC
IAGC OP max. sink current
IAGC OP leakage current
30
30
µA
µA
TPI, TPQ signals limiting
No signal applied
45
1
AFC
AFC DC current, IAFC4k5
AFC DC current
19
19
µA
µA
fC = fLO14·5kHz, CW
fC = fLO12·5kHz, CW
0·0
IAFC4k5
10·2
IAFC4k5
10·7
IAFC4k5
20·9
AFC DC current
19
µA
fC = fLO16·5kHz, CW
IAFC4k5
20·2
Bit Rate Filter Control
BRF CNT input logic high
26
V
2400 baud
VCC
2
VCC2
20·3
0
20·4
BRF CNT input logic low
Tristate I/P current window
BRF 1 output current
BRF 1 output current
BRF 1 output current
26
26
27
27
27
26
26
V
1200 baud
512 baud
Pin 26 logic high
Pin 26 logic low
Pin 26 logic tristate (open circuit)
0·1
10·4
µA
µA
µA
µA
µA
µA
3·5
1·7
0·74
BRF CNT input high current
BRF CNT input low current
27·5
27·5
115
17·5
4
SL6679
ELECTRICAL CHARACTERISTICS (2)
Electrical Characteristics (2) are guaranteed over the following range of operating conditions unless otherwise stated.
Characteristics are tested at room temperature only and are guaranteed by characterisation test or design.
TAMB = 210°C to 155°C, VCC1 = 1·4V to 2·0V, VCC2 = 2·3V to 3·2V. VCC1,VCC220·8V
Value
Characteristic
Pin
Units
Conditions
Typ.
Max.
Min.
Supply voltage, VCC
Supply voltage, VCC2
Supply current, ICC1
1
11
22
11
22
7
7
1
18
18
18
0·95
1·9
1·3
2·7
1·60
350
1·0
2·7
3·5
2·4
510
1·05
3
800
1·33
18
V
V
mA
µA
V
mA
µA
V
µA
µA
ms
VCC1<VCC220·8V at >25°C only
Including IRF
Supply current, ICC2
1 volt regulator, VREG
1 volt regulator load current
LNA current source, IRF
Reference voltage, VREF
VREF source current
0·93
0·25
375
ILOAD = 3mA, external PNP(b>100, VCE = 0·1V)
External PNP(hFE>100, VCE = 0·1V)
PTAT, voltage on pin 1 = 0·3V and 1·3V
Typical temperature coefficient = 10·1mV/°C
500
1·25
1·13
VREF sink current
0·8
Turn-on time
9
2
Stable data O/P when 3dB above sensitivity.
CVREF = 2·2µF
Turn-off time
ms
Fall to 10% of steady state ICC1. CVREF = 2·2µF
Data Amplifier
DATA OP sink current
DATA OP leakage current
Output mark:space ratio
21
21
21
22
µA
µA
Output logic low, pin 21 voltage = 0·3V
Output logic high, pin 21 voltage = VCC2
Preamble at 1200 baud, Df = 4kHz,
pin 26 = 0V, BRF capacitor = 560pF,
DATA OP pullup resistor = 200kΩ
1·5
9:7
7:9
Battery Economy
Power down ICC1
Power down ICC2
BEC input logic high
BEC input logic low
BEC input current
BEC input current
11
22
20
20
20
20
0·5
2·0
12
12
VCC2
0·3
1·5
1·5
µA
µA
V
V
µA
µA
Pin 20 = logic low
Pin 20 = logic low
Powered up
Powered down
Powered up
V
CC220·3V
0
21·5
21·5
Powered down
Battery Flag
V
BATT trigger point
28
23
23
23
28
28
28
1·04
1·08
1·12
2
V
Current sunk by pin 23 = 1µA
Pin 28 voltage = 1·04V
Pin 28 voltage = 1·12V
Pin 28 voltage = 1·14V
BATT FLAG sink current
BATT FLAG sink current
BATT FLAG sink current
µA
µA
µA
V
µA
µA
2
20
VBATT input voltage
VBATT input current
VBATT input current
2·0
1·5
1·5
21·5
21·5
VBATT = 1·14V
BATT = 1·04V
V
Continued…
5
SL6679
ELECTRICAL CHARACTERISTICS (2) (Cont.)
Electrical Characteristics (2) are guaranteed over the following range of operating conditions unless otherwise stated.
Characteristics are tested at room temperature only and are guaranteed by characterisation test or design.
TAMB = 210°C to 155°C, VCC1 = 1·4V to 2·0V, VCC2 = 2·3V to 3·2V. VCC1,VCC220·8V
Value
Characteristic
Pin
Units
Conditions
Max.
Typ.
Min.
Mixers
LO DC bias voltage
Gain to TPI
12,14
3,5,8,12
V
42
CC1
V
dB
35
LO inputs (12, 14) driven in quadrature:
45mVrms at 450MHz, CW.
46
Mixer inputs (3, 5) driven differentially:
0·45mVrms at 450·004MHz, CW.
As gain to TPI
Gain to TPQ
3,5,14,
17
3,5,8,
35
42
0
dB
dB
46
Match of gain to TPI
and TPQ
21·5
As gain toTPI
11·5
12,14,17
Audio AGC
IAGC OP max. sink current
IAGC OP leakage current
30
30
30
45
µA
µA
TPI, TPQ signals limiting
No signal applied
70
1
AFC
AFC DC current, IAFC4k5
AFC DC current
19
19
0·0
µA
µA
fC = fLO14·5kHz, CW
fC = fLO12·5kHz, CW
IAFC4k5
10·1
IAFC4k5
10·7
IAFC4k5
20·9
AFC DC current
19
µA
fC = fLO16·5kHz, CW
IAFC4k5
20·1
Bit Rate Filter Control
BRF CNT input logic high
26
VCC
2
V
2400 baud
VCC2
20·3
0
20·4
BRF CNT input logic low
Tristate I/P current window
BRF 1 output current
BRF 1 output current
BRF 1 output current
26
26
27
27
27
26
26
V
1200 baud
512 baud
Pin 26 logic high
Pin 26 logic low
Pin 26 logic tristate (open circuit)
0·1
10·4
µA
µA
µA
µA
µA
µA
3·5
1·7
0·74
BRF CNT input high current
BRF CNT input low current
210
210
110
110
6
SL6679
RECEIVER CHARACTERISTICS (450MHz)
Receiver Characteristics (450MHz) are guaranteed over the following range of operating conditions unless otherwise stated.
Characteristics are not tested but are guaranteed by characterisation test or design. All measurements made using the
characterisation circuit Fig. 5. See Application Note AN137 for details of test method.
TAMB = 210°C to 155°C, VCC1 = 1·04V to 2·0V, VCC2 = 2·3V to 3·2V, VCC1,VCC220·8V, carrier frequency = 450MHz,
BER = 1 in 30, AFC open loop. LNA gain set such that an RF signal of273dBm at the LNA input, offset from the LO
by 4kHz, gives a typical IF signal level of 300mV p-p at TPI and TPQ. LNA noise figure,2dB
Value
Characteristic
Units
Conditions
Max.
Typ.
Min.
Sensitivity
2128
2126
2123
dBm
2122 dBm
2119 dBm
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm
Intermodulation, IP3
Adjacent Channel
57
55
53
dB
dB
dB
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm. Channel
spacing 25kHz
50
48
70
69
66
dB
dB
dB
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm. Channel
spacing 25kHz
62·5
60
Deviation Acceptance
Up
Down
Up
Down
Up
Down
11·9
22·5
13·0
22·3
12·5
22·3
kHz
kHz
14·6 kHz
21·7 kHz
14·6 kHz
21·7 kHz
512bps, Df = 4·5kHz, no AFC
512bps, Df = 4·5kHz, no AFC
1200bps, Df = 4·0kHz, no AFC
1200bps, Df = 4·0kHz, no AFC
2400bps, Df = 4·5kHz, no AFC
2400bps, Df = 4·5kHz, no AFC
11·8
22·7
11·7
23
Centre Frequency Acceptance
62·8
62·5
62·5
kHz
62·9 kHz
63·2 kHz
512bps, Df = 4·5kHz, no AFC
1200bps, Df = 4·0kHz, no AFC
2400bps, Df = 4·5kHz, no AFC
62·0
62·0
AFC Capture Range (AFC
Closed Loop)
64
63·5
64
kHz
kHz
kHz
512bps, Df = 4·5kHz. All at sensitivity 13dB or above
1200bps, Df = 4·0kHz. All at sensitivity 13dB or above
2400bps, Df = 4·5kHz. All at sensitivity 13dB or above
7
SL6679
RECEIVER CHARACTERISTICS (280MHz)
Receiver Characteristics (280MHz) are guaranteed over the following range of operating conditions unless otherwise stated.
Characteristics are not tested but are guaranteed by characterisation test or design. All measurements made using the
characterisation circuit Fig. 5. See Application Note AN137 for details of test method.
T
= 210°C to 155°C, VCC1 = 1·04V to 2·0V, VCC2 = 2·3V to 3·2V, VCC1,VCC220·8V, carrier frequency = 280MHz,
BAEMRB = 1 in 30, AFC open loop. LNA gain set such that an RF signal of273dBm at the LNA input, offset from the LO
by 4kHz, gives a typical IF signal level of 300mV p-p at TPI and TPQ. LNA noise figure,2dB
Value
Characteristic
Units
Conditions
Max.
Typ.
Min.
Sensitivity
2129
2127
2124
dBm
2124 dBm
2121 dBm
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm
2128
2127
Intermodulation, IP3
Adjacent Channel
57
56
53·5
dB
dB
dB
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm. Channel
spacing 25kHz
52
49
60
57
72
69
60
dB
dB
dB
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm. Channel
spacing 25kHz
62·5
60
80
77
Deviation Acceptance
Up
Down
Up
Down
Up
Down
11·9
22·5
13·0
22·9
12·5
22·3
kHz
kHz
14·6 kHz
21·7 kHz
14·6 kHz
21·7 kHz
512bps, Df = 4·5kHz, no AFC
512bps, Df = 4·5kHz, no AFC
1200bps, Df = 4·0kHz, no AFC
1200bps, Df = 4·0kHz, no AFC
2400bps, Df = 4·5kHz, no AFC
2400bps, Df = 4·5kHz, no AFC
11·8
23·8
11·7
23·0
Centre Frequency Acceptance
63·1
62·9
62·5
kHz
63·1 kHz
63·2 kHz
512bps, Df = 4·5kHz, no AFC
1200bps, Df = 4·0kHz, no AFC
2400bps, Df = 4·5kHz, no AFC
62·0
62·0
AFC Capture Range (AFC
Closed Loop)
64
63·5
64
kHz
kHz
kHz
512bps, Df = 4·5kHz. All at sensitivity 13dB or above
1200bps, Df = 4·0kHz. All at sensitivity 13dB or above
2400bps, Df = 4·5kHz. All at sensitivity 13dB or above
1MHz Blocking
75
75
73
dB
dB
dB
512bps, Df = 4·5kHz
1200bps, Df = 4·0kHz
2400bps, Df = 4·5kHz. LO = 215dBm
67
65
78
76
Mark:space amplitude
modulation acceptance
20
23
dB
2400bps, R14 = 120kΩ (Fig. 5), room temperature
only. See Note.
NOTE
The mark:space amplitude acceptance is the maximum amplitude ratio which can occur (for example due to Simulcast conditions) with 2400bps,
using a POCSAG decoder with R14 = 120kΩ to achieve an 80% call rate and the lower amplitude set at a sensitivity of 120dB. the maxima and
minima of the amplitude modulation correspond to the positive and negative (or vice versa) frequency shifts of the FSK modulation.
8
SL6679
OPERATION OF SL6679
Low Noise Amplifier
To achieve optimum performance it is necessary to incor-
porate a Low Noise RF Amplifier at the front end of the
receiver. This is easily biased using the on-chip voltages and
current source provided. All voltages and current sources
used for bias of the RF amplifier, receiver and mixers should
be RF decoupled using 1nF capacitors. The receiver also
requires a stable Local Oscillator at the required channel
frequency.
the external AGC circuit by causing a PIN diode to conduct,
reducing the signal to the RF amplifier.
RF AGC
The RF AGC is an automatic gain control loop that
protects the mixer’s RF inputs, Pins 3 and 5, from large out of
band RF signals. The loop consists of an RF received signal
strength indicator which detect the signal at the inputs of the
mixers. This RSSI signal is then used to control the LNA
current source (pin 1).
Local Oscillator
The Local Oscillator signal is applied to the device in
phase quadrature. This can be achieved with the use of two
RC networks operating at their 23dB/45° transfer character-
istic. The RC characteristics for I and Q channels are com-
bined to give a full 90° phase differential between the LO ports
of the device. Each LO port also requires an equal level of
drive from the oscillator. This is achieved by forming the two
RC networks into a power divider.
Regulator
The on-chip regulator should be used in conjunction with
asuitablePNPtransistortoachieveregulation. Asthetransis-
tor forms part of the regulator feedback loop the transistor
should exhibit the following characteristics:
H
FE.100 for VCE. = 0·1V
Gyrator Filters
If no external transistor is used, the maximum current
sourcing capability of the regulator is limited to 30µA.
The on-chip filters include an adjustable gyrator filter. This
may be adjusted by changing the value of the resistor con-
nected between pin 13 and GND. This allows adjustment of
the filters’ cutoff frequency and allows for compensation for
possible process variations.
Automatic Frequency Control (Fig. 4)
The Automatic Frequency Control consists of a detection
circuit which gives a current output at AFC OP whose magni-
tude and sign is a function of the difference between the local
oscillator (fLO) and carrier frequencies (fC). This output current
is then filtered by an off-chip integrating capacitor. The
integrator’s output voltage is used to control a voltage control
crystal oscillator. This closes the AFC feedback loop giving
the automatic frequency control function. For an FSK modu-
lated incoming RF carrier, the AFC OP current’s polarity is
positive, i.e.current is sourced for fLO,fC,fLO14kHz and
negative, i.e. current is sunk, for fLO.fC.fLO24kHz. The
magnitude of the AFC OP current is a function of frequency
offset and the transmitted data’s bit stream. If the carrier
Audio AGC (Fig. 3)
The Audio AGC consists of a current sink which is control-
led by the audio (baseband) signal. It has three parameters
that may be controlled by the user. These are the attack (turn
on ) time, decay (duration) time and threshold level. The
attack time is simply determined by the value of the external
capacitor connected to TCADJ. The external capacitor is in
series with an internal 100kΩ resistor and the time constant
of this circuit dictates the attack time of the AGC.
i.e. tATTACK = 100kΩ3C18
frequency, (fC), equals the local oscillator frequency, (fLO
)
The decay time is determined by the external resistor
connected in parallel with the capacitor CTC. The decay time
is simply
then the magnitude of the current is zero.
BIT RATE FILTER CONTROL
t
DECAY = R173C18
The logic level on pin 26 controls the cutoff frequency of
the 1st order bit rate for a given bit rate filter capacitor at pin
27. This allows the cutoff frequency to be changed between
fC, 2fC and 0·43fC through the logic level on pin 26. This
functionisachievedbychangingthevalueofthecurrentinthe
4f detector’s output stage. A logic zero (0V to 0·1V) on pin 26
gives a cutoff frequency of fC a logic one (VCC220·3V to VCC2)
gives a cut off frequency of 2fC and an open circuit at pin 26
gives a cutoff frequency of 0·43fC.
When a large audio (baseband) signal is incident on the
input to the AGC circuit, the variable current source is turned
on. This causes a voltage drop across R13. The voltage
potential between VREF and the voltage on pin 31 causes a
current to flow in pin 30. This charges up C18 through the
100kΩ internal resistor. As the voltage across the capacitor
increases, a current source is turned on and this sinks current
from pin 32. The current sink on pin 32 can be used to drive
9
SL6679
RF
INPUT
SL6679
V 1
CC
V
V
REF
15mV
CC
CURRENT
SOURCE 1
30
−
+
TO RF AMP
−
+
100k
32
31
R17
DECAY
C18
C
TC
R13
C34
R
V
V
REF
REF
Fig.3 AGC schematic
SL6679
18
VOLTAGE
REFERENCE
C
VREF
V
2
CC
C15
C30
C
INT
1
C
INT
2
0µA/5µA
5µA/0µA
AFC
DETECTION
CIRCUIT
TO VCXO
VARACTOR
DIODE
19
R15
320k
V 1
CC
C21
C22
R11
24
25
Fig. 4 AFC schematic
Component (Fig. 4)
C22 C21 R11
Peak deviation
(kHz)
Baud rate
(bps)
512, 1200, 2400
512, 1200, 2400
512, 1200, 2400
512, 1200, 2400
512, 1200, 2400
750pF 2·0nF 15kΩ
560pF 1·5nF 15kΩ
510pF 1·3nF 15kΩ
470pF 1·2nF 15kΩ
430pF 1·1nF 15kΩ
3·5
4
4·5
5
5·5
Table 2 AFC defining components
10
SL6679
A F C 2
Q 2
Q 1
Q
B R F C N T
B R F 1
L O I P
G Y R I
L O I P
R 1 4
T T V B A
L I M T P I
I A G C O P
I
C C
1
V
C 1 8
R 1 7
T C A D J
I 2
I 1
G T H A D J
R 1 3
C 3 4
Fig. 5 SL6679 characterisation circuit (see Tables 3 and 4 for component values)
11
SL6679
Resistors
4·7kΩ
Capacitors
Capacitors (cont.)
Inductors
56nH
C1
C2
12pF
O/C
C18
C19
100nF L1
1nF
R1
R2
R3
R4
R5
R6
R7
R8
T1
30nH 1:1, Coilcraft M1686-A
4·7kΩ
1·5kΩ
100Ω
100Ω
100Ω
100Ω
430kΩ
220kΩ
S/C
C3
220nF C20
2·2µF
1·5nF
560pF TR1
1nF TR2
2·2µF TR3
100nF
100nF
560pF
1nF
Transistors
C4
C5
C6
C7
1nF
1nF
1nF
1nF
C21
C22
C23
C24
Toshiba 2SC5065
Toshiba 2SC5065
FMMT589 (Zetex ZTX550)
C8
C9
3·3pF C25
4·7nF C26
4·7nF C27
4·7pF C28
5·6pF C29
1nF
1nF
1nF
1nF
R9
C10
C11
C12
C13
C14
C15
C16
C17
R10
R11
R12
R13
R14
R15
R16
R17
R18
15kΩ
2kΩ
1nF
C30
C32
C33
C34
1nF
39kΩ
180kΩ
430kΩ
220kΩ
220kΩ
3·3MΩ
100nF
100nF
100nF
3-10pF
2·2µF VC1
Table 3 Component list for 280MHz characterisation board
Capacitors
Capacitors (cont.)
Inductors
47nH
Resistors
L1
T1
R1
R2
R3
R4
R5
R6
R7
R8
4·7kΩ C1
4·7kΩ C2
1·5kΩ C3
O/C
O/C
1nF
C18
C19
C20
C21
C22
C23
C24
100nF
1nF
2·2µF
1·5nF
560pF
1nF
2·2µF
100nF
100nF
560pF
1nF
16nH 1:1, Coilcraft Q4123-A
Transistors
100Ω
100Ω
100Ω
100Ω
C4
1nF
1nF
1nF
1nF
TR1
TR2
TR3
Philips BFT25A
Philips BFT25A
FMMT589 (Zetex ZTX550)
C5
C6
C7
430kΩ C8
220kΩ C9
3·3pF C25
4·7nF C26
4·7nF C27
3·9pF C28
3·3pF C29
1nF
1nF
1nF
1nF
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
S/C
15kΩ
2kΩ
C10
C11
C12
C13
1nF
39kΩ
C30
C32
C33
C34
1nF
180kΩ C14
430kΩ C15
220kΩ C16
220kΩ C17
3.3MΩ
100nF
100nF
100nF
3-10pF
2·2µF VC1
Table 4 Component list for 450MHz characterisation board
12
SL6679
TYPICAL DC PARAMETERS (FIGS. 6 TO 8)
2·2
2
Fig. 6a Typical ICC
1
1·8
1·6
1·4
1·2
1
V
V
CC = 3·0, 4·0
0·8
0·6
0·4
0·2
CC = 1·3, 2·7
CC = 1·0, 1·9
V
240
220
0
20
40
60
80
TEMPERATURE °C
0·55
0·5
Fig. 6b Typical ICC
2
0·45
0·4
0·35
0·3
0·25
0·2
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
0·15
0·1
V
CC = 1·0, 1·9
0·05
240
220
0
20
40
60
80
TEMPERATURE °C
Conditions
Standard Mitel characterisation board (Fig. 5)
I
CC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current
The Audio AGC and RF AGC are both inactive
ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz
V
BATT connected to VCC
1
Fig. 6 Typical ICC1 and ICC2 v. supply and temperature
13
SL6679
1·30
1·28
1·26
1·24
1·22
Fig. 7a Typical VREF
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
V
CC = 1·0, 1·9
240
220
0
20
40
60
80
TEMPERATURE °C
1·05
1·03
1·01
0·99
0·97
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
Fig. 7b Typical VREG (load = 2·2kΩ to GND)
V
CC = 1·0, 1·9
240
220
0
20
40
60
80
TEMPERATURE °C
Conditions
Standard Mitel characterisation board (Fig. 5)
I
CC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current
The Audio AGC and RF AGC are both inactive
ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz
V
BATT connected to VCC
1
Fig. 7 Typical VREF and VREG v. supply and temperature
14
SL6679
700
600
500
400
300
200
100
Fig. 8a Typical IRF (VIRF = 0·3V)
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
CC = 1·0, 1·9
V
240
220
0
20
40
60
80
TEMPERATURE °C
700
600
500
400
300
200
100
Fig. 8b Typical IRF (VIRF = 1·3V)
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
V
CC = 1·0, 1·9
240
220
0
20
40
60
80
TEMPERATURE °C
Conditions
Standard Mitel characterisation board (Fig. 5)
I
CC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current
The Audio AGC and RF AGC are both inactive
ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz
V
BATT connected to VCC
1
Fig. 8 Typical IRF v. supply and temperature
15
SL6679
1·1
1·08
1·06
1·04
VCC = 3·5
VCC = 2·7
VCC = 2·3
VCC = 1·9
240
220
0
20
40
60
80
TEMPERATURE °C
Conditions
Standard Mitel characterisation board (Fig. 5)
ICC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current
The Audio AGC and RF AGC are both inactive
ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz
VBATT connected to VCC
1
Fig. 9 Typical battery flag trigger voltage (VBATTFLAG = VCC/2) v. supply and temperature
TYPICAL AC PARAMETERS (FIGS. 10 TO 13)
TEMPERATURE °C
240
220
0
20
40
60
80
VCC = 3·0, 4·0
VCC = 1·3, 2·7
2124·00
2126·00
2128·00
2130·00
VCC = 1·0, 1·9
Conditions
282 Mitel characterisation board (Fig. 5), fC = 282MHz
1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30
The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal
level of 300mVp-p at TPI and TPQ
Fig. 10 Typical sensitivity v. supply and temperature
16
SL6679
60
58
56
54
52
Fig. 11a Typical IP3
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
CC = 1·0, 1·9
V
240
220
0
20
40
60
80
TEMPERATURE °C
69
68·5
68
Fig. 11b Typical adjacent channel
67·5
67
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
V
CC = 1·0, 1·9
66·5
240
220
0
20
40
60
80
TEMPERATURE °C
Conditions
282 Mitel characterisation board (Fig. 5), fC = 282MHz
1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30
The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal
level of 300mVp-p at TPI and TPQ
Fig. 11 Typical IP3 and adjacent channel v. supply and temperature
17
SL6679
4·0
3·5
3·0
2·5
Fig. 12a Typial deviation acceptance UP
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
V
CC = 1·0, 1·9
240
220
0
20
40
60
80
TEMPERATURE °C
3·07
3·02
2·97
2·92
2·87
Fig 12b Typical deviation acceptance DOWN
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
V
CC = 1·0, 1·9
240
220
0
20
40
60
80
Conditions
TEMPERATURE °C
282 Mitel characterisation board (Fig. 5), fC = 282MHz
1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30
The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal
level of 300mVp-p at TPI and TPQ
Fig. 12 Typical deviation acceptance v. supply and temperature
18
SL6679
3·15
3·1
Fig. 13a Typical centre frequency acceptance
3·05
3
2·95
2·9
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
CC = 1·0, 1·9
V
2·85
240
220
0
20
40
60
80
TEMPERATURE °C
80
79
78
77
76
75
74
73
72
71
Fig. 13b Typical1MHz blocking
V
V
CC = 3·0, 4·0
CC = 1·3, 2·7
V
CC = 1·0, 1·9
240
220
0
20
40
60
80
TEMPERATURE °C
Conditions
282 Mitel characterisation board (Fig. 5), fC = 282MHz
1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30
The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal
level of 300mVp-p at TPI and TPQ
Fig. 13 Typical centre frequency acceptance and 1MHz blocking v. supply and temperature
19
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