SA58646 Datasheet, PDF (3/42 Pages) NXP Semiconductors – UHF 900 MHz transceiver IC

NXP Semiconductors
5. Block diagram
SA58646
UHF 900 MHz transceiver IC
IF
10.7 MHz
IF
10.7 MHz
IF
10.7 MHz
RFIX
2
RFIY
3
GNDVRX 60
VRX 57
RXLOY 59
RXLF 5
RXLOX 58
64 4
62 1
63 56
55 53
52 50 51 54 47 61
LNA
mixer
+90°
mixer
QUADRATURE
PHASE SHIFTER
IFamp1
IFamp2
limiter
IF
PLL
DEMODULATOR
amplifier
DATA COMPARATOR
data amplifier
tune
RSSI
RSSI
MIXER
RX-RF
VREG
RX
EXPANDER
MUTE
RX gain
VCO
RX
SA58646
earpiece volume
amplifier control
VB
RX-BB
49 PLLO
48 DETO
7 RSSI
BAND
PASS
40 DATAI
39 DATAO
44 VCC(ARX)
46 RXAI
45 ECAP
43 EARI
42 EARO
41 GND(ARX)
RXPD 6
XTALI 32
XTALO 33
CLKO 35
VCP 10
GNDVCP 11
OSCILLATOR
VCP
CLOCK
DIVIDER
VOLTAGE
DOUBLER
10-BIT
REFERENCE
DIVIDER
VCP
RX PHASE
DETECTOR
VCP
TX PHASE
DETECTOR
10-BIT
6-BIT
MAIN RX PRESCALER
DIVIDER
RX
10-BIT
6-BIT
MAIN TX PRESCALER
DIVIDER
TX
SYNTHESIZER
12 VCC(PS)
13 TXPD
VCC(ATX) ₂₄
GND(ATX) 31
MICI 27
MICO 28
microphone
amplifier
VB
ALC
CMPI 29
CCAP 25
COMPRESSOR
HARD
LIMITER
TX-BB
TX gain
MUTE
VB VREG
VREG 8
VB 30
VOLTAGE
REGULATOR
EN 36
DATA 38
CLK 37
MICROCONTROLLER
SERIAL
INTERFACE
9
26
TX-RF
VCO
TX
VB
summator
VREG
TX
PA
22 TXLOX
14 TXLF
23 TXLOY
20 GNDVTX
21 VTX
16 PAO
15, 17 GND(PA)
LOW BATTERY
CDLBD/ ^DETECTOR
TEST
34 CDLBD
18
19
LBD
VCC
VB
CD
RSSI
VB
OL RX/TX
001aaf616
Fig 1. Block diagram of SA58646
SA58646_1
Product data sheet
Rev. 01 — 8 February 2007
© NXP B.V. 2007. All rights reserved.
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