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Электронный компонент: T2803-PLQ

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Rev. 4572GDECT01/04
Features
Supply-voltage Range 3 V to 4.6 V (Regulated)
Auxiliary Voltage Regulator On-chip (3.2 V to 4.6 V)
Low Current Consumption
Few Low-cost External Components
No Mechanical Tuning Required
Supports Multiple Reference Clocks (10.368 MHz/13.824 MHz)
Fast Settling Synthesizer (864 kHz Channel Spacing)
TX Preamplifier with 3 dBm Output Power at 2.45 GHz (4 Programmable Power Levels)
Ramp-signal Generator for Power Ramping and Power Control of External SiGe Power
Amplifier (T7024 and T7026)
Electrostatic sensitive device.
Observe precautions for handling.
Description
The T2803 is an RF IC for low-power applications in the 2.45 GHz ISM band. The
QFN48-packaged IC is a complete transceiver including image rejection mixer, IF
amplifier, FM demodulator, baseband filter, RSSI, TX preamplifier, power-ramping
generator for power amplifiers, integrated synthesizer, fully integrated VCO and Gaus-
sian data filter for TX. No mechanical tuning is necessary in production.
Figure 1. Block Diagram
TANK
PC
RC
GF
CP
VCO
f
: n
f
: n
CTRL
LOGIC
PD
TX/RX
SWITCH
IR MIXER
IF AMP 1
IF AMP 2
DEMOD
BB FILTER
3-WIRE
BUS
DEMOD DAC
RSSI
TX DRIVER
CLOCK
DATA
ENABLE
RX_ON
TX_ON
PU_RX/TX
PU_PLL
TX_DATA
RSSI
BB_OUT
CF
DEMOD
IF_TANK
IF_IN
MIXER
OUT
RF_IN
TX_OUT
VS_VCO
CP
LD
REF_CLK
VTUNE
VREG
VS_REG
REG_CTRL
VREG_VCO
VCO
REG
RAMP
GEN
RAMP_OUT
RAMP_SET
AUX
REG
OLE
PU_REG
GND_VCO
D/A
I_CPSW
RAMP
D/A
2.4 GHz
WDECT/ISM
Single-chip
Transceiver
T2803
Preliminary
2
T2803 [Preliminary]
4572GDECT01/04
Table 1. Functional Block Description
Pin Configuration
Figure 2. Pinning QFN48
Name
Description
AUX REG
Auxiliary voltage regulator
BBF
Baseband filter
CP
Charge pump
DAC
D/A converter for demodulator tuning
DEMOD
Demodulator
GF
Gaussian filter for transmit data
IF AMP1
1st intermediate frequency amplifier
IF AMP2
2nd intermediate frequency amplifier
IR MIXER
Image rejection mixer
PC
Programmable counter
PD
Phase detector
RAMP GEN
Ramp-signal generator
RC
Reference counter
RSSI
Received signal-strength indicator
TX DRIVER
Buffer amplifier for TX_OUT
TX/RX SWITCH
Switches VCO signal to IR MIXER respectively TX DRIVER
VCO
Voltage-controlled oscillator
VCO REG
Voltage regulator for VCO
CLOCK
DATA
ENABLE
REF_CLK
LD
PU_REG
VS_PLL
VREG
REG_CTRL
VS_REG
GND_CP
VS_CP
RAMP_OUT
IF_IN2
IF_IN1
VS_IF
TX_OUT
GND3
RF_IN2
RF_IN1
GND2
IF_TANK2
IF_TANK1
RSSI
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15
16 17 18 19
20 21
22
23 24
36
35
34
33
32
31
30
29
28
27
26
25
48 47
46
45
44 43
42
41 40
39
38 37
T2803
R
X
_
O
N
T
X
_
O
N
M
I
X
E
R
_
O
U
T
1
O
L
E
T
X
_
D
A
T
A
V
S
_
M
I
X
E
R
G
N
D
_
P
L
L
P
U
_
R
X
/
T
X
P
U
_
P
L
L
I
_
C
P
S
W
R
A
M
P
_
S
E
T
M
I
X
E
R
_
O
U
T
2
C
P
G
N
D
_
V
C
O
V
S
_
V
C
O
G
N
D
1
V
T
U
N
E
V
R
E
G
_
V
C
O
B
B
_
O
U
T
D
A
C
_
D
E
C
B
B
_
C
F
R
E
G
_
D
E
C
D
E
M
O
D
_
T
A
N
K
2
D
E
M
O
D
_
T
A
N
K
1
3
T2803 [Preliminary]
4572GDECT01/04
Pin Description
Pin
Symbol
Function
Configuration
1
2
3
CLOCK
DATA
ENABLE
3-wire-bus: Clock input
3-wire-bus: Data input
3-wire-bus: Enable input
4
REF_CLK
Reference-frequency input
5
LD
Lock-detect output
6
PU_REG
Power-up input for auxiliary voltage regulator
CLOCK
DATA
ENABLE
1,2,3
5k
5k
VS_PLL
7
GND_PLL
43
VS_PLL
7
REF_CLK
4
10k
GND_PLL
43
10k
GND_PLL
43
100
LD
5
PU_REG
6
25k
25k
GND_PLL
43
4
T2803 [Preliminary]
4572GDECT01/04
7
VS_PLL
PLL supply voltage
8
9
10
VREG
REG_CTRL
VS_REG
Auxiliary voltage-regulator output
Auxiliary voltage-regulator control output
Auxiliary voltage-regulator supply voltage
11
12
13
GND_CP
VS_CP
CP
Charge-pump ground
Charge-pump supply voltage
Charge-pump output
Pin Description (Continued)
Pin
Symbol
Function
Configuration
GND_PLL
43
GND2
28
GND1
18
GND3
31
GND_CP
11
GND_VCO
16
VS_MIXER
42
VS_IF
33
VS_VCO
14
VS_CP
12
VS_REG
10
VS_PLL
7
VREG
8
REG_CTRL
9
VS_REG
10
GND_PLL
43
VS_PLL
7
VS_CP
12
CP
13
GND_CP
11
VS_PLL
7
GND_PLL
43
5
T2803 [Preliminary]
4572GDECT01/04
14
15
16
VS_VCO
VREG_VCO
GND_VCO
VCO voltage-regulator supply voltage
VCO voltage-regulator control output
VCO ground
17
VTUNE
VCO tuning voltage input
18
GND1
Ground
Pin Description (Continued)
Pin
Symbol
Function
Configuration
VS_VCO
14
GND_VCO
16
VREG_VCO
15
VS_PLL
7
GND_PLL
43
VTUNE
17
GND_VCO
16
VREG_VCO
15
VS_PLL
7
GND_PLL
43
GND_PLL
43
GND2
28
GND1
18
GND3
31
GND_CP
11
GND_VCO
16
VS_MIXER
42
VS_IF
33
VS_VCO
14
VS_CP
12
VS_REG
10
VS_PLL
7