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Электронный компонент: U2760B

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U2760B
Rev. A3, 05-Oct-98
1 (14)
CT2-RX/TX IC
Description
The IC for digital cordless telephone application is
fabricated using TEMIC's most advanced UHF process.
It covers the CT2 band (864 MHz to 868 MHz) as well as
the CT2 Plus band (up to 952 MHz). The RX/TX circuit
provides the down conversion to the data stream and the
up conversion from the first IF. In conjunction with
TEMIC's RF front end, Twin PLL, I/Q modulator and
AMDs CT2 PhoX
TM
controller AM 79C4xx a complete
CT2 IC kit is available.
Electrostatic sensitive device.
Observe precautions for handling.
Features
D Low supply voltage 2.9 V typical (min. 2.7 V)
D Provides down conversion to the data stream,
up conversion from the first IF
D Integrated UHF and VHF VCOs
D Low noise figure of RX path (NF v 10 dB)
D RX and TX power down
D First IF filter used for transmit as well receive mode
D Temperature compensated logarithmic Receiver
Signal Strength Indicator (RSSI) with a 75 dB
dynamic range
D Low power consumption in RX and TX mode
(<20 mA typ.)
D SSO28 plastic package
Benefits
D Low power consumption results in extended talk time
D Few external components and very small package
save space
Block Diagram (Simplified Schematic)
MX1
MX2
MX4
MX3
VCO1
VCO2
LIMIT
RSSI
RSSI out
DEMOD
RXdata
RX enable
MX1 in
MX4 outn
MX1/3
outp
VCO1 ref
VCO1 tank
VCO1 out
VCO2
ref
VCO2
tank
VCO2
out
MX3 in
DEMOD out
COMP cap
COMP in
MX1/3
outn
MX2/4
nin
MX2 out
LIMIT in
QUAD
TX enable
VCC
vco/lf
VCC
GND
vco/lf
GND
MX4 outp
26
25
2
28
4
20
19
27
11
12
13
10
18
16
17
3
8
9
24
23
22
5
6
7
21
15
14
COMP
10 pF
100k
W
100k
W
94 9532
1
MX2/4
in
Figure 1.
U2760B
Rev. A3, 05-Oct-98
2 (14)
Ordering Information
Extended Type Number
Package
Remarks
U2760B-AFS
SSO28
Rail, MOQ 600pcs.
U2760B-AFS G3
SSO28
Tape + reel, MOQ 4000 pcs.
Functional Description
MX1
Mixer 1 converts the RF signal to the first IF. It has a high
impedance, unsymmetrical input and a symmetrical open
collector output.
MX2
The second mixer provides the down conversion to the
second IF. An external SAW filter is placed at its input to
provide rejection of the image frequency and spurious
signals that went through the RF filtering.
LIMITER / RSSI
This block contains a high gain (100 dB) amplifier,
providing a limited signal at the second IF frequency for
the demodulation, as well as a signal strength indicator
providing an output voltage proportional to the input
power.
Demod
The quadrature demodulator in the receiving path
contains an internal 10 pF quadrature capacitor to couple
the IF signal to the external Tank providing the 90 degree
phase shift. An external bit slicer reshapes the bits, a
sample and hold circuit maintains the average DC value
at the demodulator when switching the signal between
transmission and reception.
COMP
The comparator circuit with 100 k
W input resistor and
external input biasing has a 10 mV hysteresis. It is
designed to square up the demodulated data signal.
MX3
The third mixer converts the 800 kHz signal coming from
the modulator circuit to the IF frequency. It has a high
impedance, unsymmetrical input and a symmetrical open
collector output.
MX4
This mixer is designed for the up conversion of the RF
frequency. It has a high impedance, unsymmetrical input
and a symmetrical open collector output. The image
rejection is obtained by external RF filtering.
The same first IF filter is used for the transmit path and
the receive path. In the transmit path, this filter is
supposed to eliminate the mixing products from MX3, in
particular, the harmonics of the IF frequency.
VCO1
The UHF VCO covers the frequency band up to
700 MHz. For external VCO application this circuit can
be used as a buffer stage.
VCO2
This VCO covers a frequency band up to 400 MHz.
U2760B
Rev. A3, 05-Oct-98
3 (14)
Pin Description
1
2
3
4
5
6
7
8
10
9
27
22
21
20
18
19
17
12
11
28
25
26
23
24
VCO1tank
VCO1ref
GNDvco/If
VCCvco/If
RXdata
QUAD
LIMITin
VCO1out
DEMODout
MX3in
MX2/4nin
MX2/4in
MX4outp
MX4outn
MX1in
VCC
GND
VCO2tank
MX1/3outn
TXenable
VCO2ref
MX1/3outp
RSSIout
MX2out
16
15
14
13
COMPin
COMPcab
VCO2out
RXenable
Figure 2. Pinning
Pin
Symbol
Function
1
MX2/4in
Mixer2/ Mixer4 input
2
MX2/4nin
Mixer2/ Mixer4 ref. input
3
MX3in
Mixer3 input
4
LIMITin
Limiter/RSSI input
5
VCO1out
VCO1 output (to PLL)
6
VCO1tank
VCO1 resonator
7
VCO1ref
VCO1 resonator, to be blocked
8
GNDvco/lf
Ground VCO, low frequency
parts
9
VCCvco/lf
Power supply VCO/LF parts
10
RXdata
RX data output
11
QUAD
Quadrature filter
12
DEMODout
Demodulator output
13
COMPin
Comparator input
14
COMPcap
Comparator blocking capacitor
15
RXenable
RX enable
16
VCO2out
VCO2 output (to PLL)
17
VCO2ref
VCO2 resonator, to be blocked
18
VCO2tank
VCO2 resonator
19
GND
Ground
20
VCC
Power supply voltage
21
MX1in
Mixer1 input
22
MX4outn
Mixer 4 output n
23
MX4outp
Mixer 4 output p
24
TXenable
TX enable
25
MX1/3outn
Mixer1/ Mixer3 output n
26
MX1/3outp
Mixer1/ Mixer3 output p
27
RSSIout
Signal strength output
28
MX2out
Mixer2 output
U2760B
Rev. A3, 05-Oct-98
4 (14)
Pin Functions
Pin
Symbol
Pin
Voltage
Function
Equivalent Circuit
1
MX2/4in
1.5
Mixer2/ Mixer4 input
To MX4
To MX2
2
MX2/4nin
1.5
Mixer2/ Mixer4 complementary
input
Pin 1 is the input of the mixers, Pin 2
can be used for differential input
signal, or should be connected to
GND via a bypass capacitor
RX
TX
1
2
19
3
MX3in
1.7 (RX)
2.4 (TX)
Mixer3 input
complementary input is internally
connected to GND via a bypass
capacitor
To MX3
TX
3
19
4
LIMITin
2.1
Limiter/RSSI input
Vcc
11
QUAD
1.5
Quadrature filter
Vcc
Ref
10pF
4
11
12
12
DEMODout
1.2
Demodulator output
5
VCO1out
1.1
VCO1 output (to PLL)
9
6
VCO1tank
1.5
VCO1 resonator
6
5
7
VCO1ref
1.5
VCO1 reference, to be blocked. This
Pin is also internally connected to
GND via a bypass capacitor
7
8
8
GNDvco/lf
Ground VCO, low frequency parts
9
VCCvco/lf
Power supply VCO/LF parts
U2760B
Rev. A3, 05-Oct-98
5 (14)
Equivalent Circuit
Function
Pin
Voltage
Symbol
Pin
10
RXdata
0 to 2.9
RX data output
Vcc
50k
13
COMPin
1.2
Comparator input
100k
10
13
14
COMPcap
1.2
Comparator blocking capacitor
100k
14
15
RXenable
RX enable
Vcc
15
16
VCO2out
1.1
VCO2 output (to PLL)
9
17
VCO2ref
1.6
VCO2 resonator, to be blocked
17
18
16
18
VCO2tank
1.6
VCO2 resonator
18
8
19
GND
Ground (mixer parts)
20
VCC
Power supply (mixer parts)
21
MX1in
1.5
Mixer1 input
complimentary input is internally
connected to GND via a bypass
capacitor
To MX1
RX
21
19
22
MX4outn
Mixer 4 output n
22
23
23
MX4outp
Mixer 4 output p
LO1
from
MX4 in
U2760B
Rev. A3, 05-Oct-98
6 (14)
Equivalent Circuit
Function
Pin
Voltage
Symbol
Pin
24
TXenable
TX enable
Vcc
24
25
MX1/3outn
Mixer1/ Mixer3 output n
LO1
LO2
26
MX1/3outp
Mixer1/ Mixer3 output p
LO1
from
MX1 in
LO2
from
MX3 in
27
RSSIout
0.2 to 2.7
Signal strength output
25k
Vcc
Vcc
27
28
MX2out
1.0 (RX)
2.4 (TX)
Mixer2 output
800
Vcc
28
U2760B
Rev. A3, 05-Oct-98
7 (14)
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltage
V
CC
0 to +5
V
Input voltages
Pins 1, 2, 3, 4, 13, 14, 15, 21 and 24
V
in
0 to V
CC
V
Input voltages Pins 6, 7, 17 and 18
V
in
1.5
V
Junction temperature
T
j
125
C
Storage temperature range
T
stg
40 to +125
C
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient SSO28
R
thJA
130
K/W
Operating Conditions
Parameters
Symbol
Value
Unit
Supply voltage
V
CC
2.7 to 3.6
V
Operating temperature
T
amb
5 to +45
C
Electrical Characteristics: Receiver Input Mixer (MX1)
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit,
f
RF
= 866.05 MHz, f
IF1
= 240.05 MHz.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 20
V
CC
2.7
2.9
3.6
V
Supply current
@
V
CC
= 2.9 V,
Pin 20
Is
3
mA
Input impedance
Pin 21
Zin
3
k
W
Input frequency
Pin 21
fin
1000
MHz
Output frequency
Pins 25 and 26
fout
240
300
MHz
Power gain
Pins 21, 25 and 26
Gp
8
dB
Noise figure
Pins 21, 25 and 26
NF
8
10
dB
Compression
Pins 21, 25 and 26
P_1dB
18
dBm
Third order input
intercept point
Pins 21, 25 and 26
IIP3
8
dBm
LO to RF isolation
Pin 21
Isol
LO
20
dB
LO
" (IF/2) response
@
P
in
= 84 dBm, Pin 21
10
dB
U2760B
Rev. A3, 05-Oct-98
8 (14)
Electrical Characteristics: Receiver IF Mixer (MX2)
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit,
f
IF1
= 240.05 MHz, f
IF2
= 800 kHz.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 20
V
CC
2.7
2.9
3.6
V
Supply current
@
V
CC
= 2.9 V, Pin 20
Is
3
mA
Input impedance
Pin 1
Zin
130
200
300
W
Input frequency
Pin 1
fin
300
MHz
Output frequency
Pin 28
fout
0.8
15
MHz
Power gain
Pins 1 and 28
Gp
10
11
dB
Noise figure
Pins 1 and 28
NF
20
dB
Compression
Pins 1 and 28
P_1dB
20
dBm
Third order input
intercept point
Pins 1 and 28
IIP3
10
dBm
LO to RF isolation
Pin 1
Isol
LO
20
dB
LO
" (IF/2) response
@
P
in
= 40 dBm, Pin 1
35
dB
Electrical Characteristics: RSSI/Limiter Amplifier
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit,
f
LIMIT
= 800 kHz.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 9
V
CC
2.7
2.9
3.6
V
Supply current
@
Vcc = 2.9 V,
Pin 9
Is
1.5
mA
Input impedance
Pin 4
Zin
1500
W
Voltage gain
Pin 4
Gv
100
dB
Frequency range
Pin 4
f
LIMIT
0.5
0.8
5
MHz
RSSI range
Pins 4 and 27
90
15
dBm
RSSI voltage at Pmin
Pins 4 and 27
0.2
0.4
V
RSSI voltage at Pmax
Pins 4 and 27
2.4
2.6
V
RSSI accuracy
Pins 4 and 27
2
2
dB
Output impedance
Pins 27
R
RSSI
19
24
29
k
W
Rise time
C
RSSI
= 1 nF,
Pin 27
50
ms
Fall time
C
RSSI
= 1 nF,
Pin 27
50
ms
Electrical Characteristics: Demodulator
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit,
f
LIMIT
= 800 kHz.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 9
V
CC
2.7
2.9
3.6
V
Supply current
@
Vcc = 2.9 V,
Pin 9
Is
0.2
mA
Output voltage
18 kHz deviation,
Pins 4 and 12
Vout
120
mV
rms
U2760B
Rev. A3, 05-Oct-98
9 (14)
Electrical Characteristics: Comparator
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 9
Vcc
2.7
2.9
3.6
V
Supply current
@
Vcc = 2.9 V,
Pin 9
Is
0.15
mA
Input hysteresis
Pins 13 and 14
10
mV
Output HIGH voltage
RLoad to GND
w
500 k
W,
Pin 10
2.3
V
Output LOW voltage
R
Load
to V
CC
w 50 kW,
Pin 10
0.6
V
Electrical Characteristics Transmitter IF Mixer (MX3)
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit,
fin
= 800 kHz, f
IF
= 240.05 MHz.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 20
V
CC
2.7
2.9
3.6
V
Supply current
@
V
CC
= 2.9 V,
Pin 20
Is
1.3
mA
Input impedance
Pin 2
Zin
5
k
W
Input frequency
Pin 3
fin
0.8
15
MHz
Output frequency
Pins 25 and 26
fout
250
300
MHz
Output power
v
inpp
= 320 mV
Pins 25 and 26
Pout
16
dBm
Noise figure
Pins 2, 25 and 26
NF
25
dB
Electrical Characteristics Transmitter Output Mixer (MX4)
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit,
f
IF
= 240.05 MHz, f
RF
= 866.05 MHz.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 20
Vcc
2.7
2.9
3.6
V
Supply current
@
V
CC
= 2.9 V,
Pin 20
Is
3.5
4
mA
Input impedance
Pin 1
Zin
130
200
300
W
Input frequency
Pin 1
300
MHz
Output frequency
Pins 22 and 23
900
MHz
Output power
P
In
= 22 dBm,
Pins 22 and 23
Pout
16
14
dBm
Noise figure
Pins 1, 22 and 23
NF
12
dB
LO leakage
Pins 22 and 23
Lk
LO
34
dBm
IF leakage
Pins 22 and 23
Lk
IF
45
dBm
(2*IF) leakage
Pins 22 and 23
Lk
2IF
55
dBm
(3*IF) leakage
Pins 22 and 23
Lk
3IF
65
dBm
(n*IF) leakage, n > 3
Pins 22 and 23
Lk
nIF
60
dBm
U2760B
Rev. A3, 05-Oct-98
10 (14)
Electrical Characteristics: UHF Voltage Controlled Oscillator (VCO1)
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit, f = 626 MHz
Parameters
Test Conditions / Pins
Symbol
Min
Typ
Max
Unit
Supply voltage range
Pin 9
V
CC
2.7
2.9
3.6
V
Supply current
@
Vcc = 2.9 V,
Pin 9
Is
3
mA
Frequency bandwidth
Pins 5, 6 and 7
f
Bw
700
MHz
Phase noise
100 kHz
Pins 5, 6 and 7
P
N
86
dBc/Hz
Phase noise
200 kHz
Pins 5, 6 and 7
P
N
104
dBc/Hz
Phase noise
300 kHz
Pins 5, 6 and 7
P
N
109
dBc/Hz
Phase noise
400 kHz
Pins 5, 6 and 7
P
N
125
dBc/Hz
Phase noise
@
50 MHz
Pins 5, 6 and 7
P
N
150
dBc/Hz
Output power
50
W termination, Pin 5
Pout
15
dBm
Electrical Characteristics: VHF Voltage Controlled Oscillator (VCO2)
Test conditions (unless otherwise specified): V
CC
= 2.9 V, T
amb
= 25
C, referred to application circuit, f = 239.25 MHz
Parameters
Test Conditions / Pins
Symbol
Min
Typ
Max
Unit
Supply voltage range
Pin 9
Vcc
2.7
2.9
3.6
V
Supply current
@
Vcc = 2.9 V,
Pin 9
Is
2.5
mA
Frequency bandwidth
Pins 16, 17 and 18
f
Bw
400
MHz
Phase noise 100 kHz
Pins 16, 17 and 18
P
N
86
dBc/Hz
Phase noise 200 kHz
Pins 16, 17 and 18
P
N
114
dBc/Hz
Phase noise 300 kHz
Pins 16, 17 and 18
P
N
119
dBc/Hz
Phase noise 400 kHz
Pins 16, 17 and 18
P
N
135
dBc/Hz
Phase noise
@
50 MHz
Pins 16, 17 and 18
P
N
150
dBc/Hz
Output power
50
W termination, Pin 16
Pout
15
dBm
U2760B
Rev. A3, 05-Oct-98
11 (14)
Applications Information
Figure 3.
U2760B
Rev. A3, 05-Oct-98
12 (14)
Application Circuit
RX enable
RX_IN
TX_enable
TX_out
2.7p
Vcc
C245
C246
Vcc
SA
W
IF1
VCO1_out
Vcc
VCO1
VCO1_cont
BBY51
03W
18
10
2
8
12
13
15 16
BPF800k
T
OKO 4FT
RSSI
Vcc

IQ-CARRIER
R208
BBY51
03W
VCO2_cpnt
MX1
MX2
MX4
MX3
VCO1
VCO2
LIMIT
RSSI
DEMOD
26
25
1
28
4
20
19
27
12
11
13
10
18
16
17
3
8
9
24
23
22
5
6
7
21
15
14
COMP
10pF
100k
2
VCO2_out
DA
T
A_RX
Vcc
R212
C230
S/H
Vcc
Cont
Ref
T
ank
SA
W
out
SA
W
i
n
GND
SHCTR
SH
GND
GND
Vcc
Vcc
C202
C203
C204
R203
C206
C207
C208
C209
C210
R201
R202
R204
C201
C205
L201
C21
1
C212
L203
L204
R205
C213
C214
C215
C216
R206
C217
C218
C220
C219
C221
L202
R207
C222
L205
C225
C226
C227
C224
C229
C228
C231
R209
R210
L206
R21
1
C234
C233
C232
R213
C235
C236
C237
C238
C238
R214
R216
R217
R215
C242
C241
C243
C244
R218
L208
C247
C248
C249
C240
L207
SHCTR
C223
12
13
15 16
18
10
2
8
BPF800k
T
OKO 4FT
2
W
100k
W
Figure 4.
U2760B
Rev. A3, 05-Oct-98
13 (14)
Package Information
13018
technical drawings
according to DIN
specifications
Package SSO28
Dimensions in mm
9.10
9.01
0.15
0.05
0.25
0.65
8.45
1.30
5.7
5.3
4.5
4.3
6.6
6.3
0.15
28
15
1
14
U2760B
Rev. A3, 05-Oct-98
14 (14)
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs ).
The Montreal Protocol ( 1987 ) and its London Amendments ( 1990 ) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of
ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA ) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423