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MAX2306ETI+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
______________________________________________________________________________________ 13
Table 3. MAX2309 Control Register States
Note: H = high, L = low, 1 = logic high, 0 = logic low, X = don’t care, blank = independent parameter.
1
1
1
1
0 1
X 1
X 0
X X
SHDN
STBY
1/
0
X0
LO BUFFER
ENABLE
If pin is floated, then
BUFEN register bit
controls buffer
H F
XX0
LO BUFFER
ENABLE
BUFEN pin controls the
LO buffer and overrides
the bit
H/
L
H
X
1/
0
0
DIVIDER
SELECT
If DIVSEL pin is floated,
then register bit selects
divider
HH F
XX0
DIVIDER
SELECT
DIVSEL pin overrides
DIVSEL register bit
HH
H/
L
X0STANDBY
0 in standby register bit
turns off VGA and mod-
ulator only
H
H/
L
H
X0STANDBY
0 in standby pin turns
off VGA and modulator
only
LH
XX XXX XXX XXSHUTDOWN
0 in shutdown register
bit leaves serial bus
active
XH X XX
XX X
IN_SEL
FM_TYPE
X
BUFEN
OPERATIONAL
MODE
ACTION
RESULT
BUF_DIV
X X
VCO_SEL
VCO_BYP
XX X
DIVSEL
TURBOCHARGE
X
TES_TEN
SHUTDOWN
Shutdown pin com-
pletely powers down
the chip
CP_POL
XL X X
TEST_MODE
PINS
STBY
X
BUFEN
SHDN
DIVSEL
ML
S CONTROL REGISTER S
BB
MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
14 ______________________________________________________________________________________
MAX2309
BYP
BYP
STBY
CDMA+
3-WIRE
DAC
0.01µF
0.01µF
0.068µF
47pF
2pF
33pF
0.01µF
10kΩ
2.4kΩ
10kΩ
33pF
47pF
33nH
0.01µF
680Ω
CDMA-
LOCK
VGC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
DATA
CLK
QOUT+
QOUT-
EN
BUFEN
IOUT-
IOUT+
REF
GND
V
CC
LOOUT
TANKH-
TANKH+
GND
CP_OUT
BYP
SHDN
DIVSEL
47pF
FM
455kHz
10kΩ10kΩ
LIMITER
DISCRIMINATOR
47kΩ
Q
I
CDMA
Figure 3. MAX2309 Typical Operating Circuit
MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
______________________________________________________________________________________ 15
V
CC
800µA
D1
R1
C
F
C
F
R
B
R
L
TANK_+
TANK_-
R
L
R
E
R
E
R
B
Figure 4. Voltage-Controlled Oscillators
14-BIT M1
COUNTER
14-BIT M2
COUNTER
13-BIT CONTROL
REGISTER
(00)
DATA
CLK
EN
M
U
X
(010)
START BIT
16-BIT
DATA/ADDRESS
REGISTER
(011)
(11X)
(01)
VCO_H
VCO_L
CPI
CP2
F
REF
CPOUT
2-BIT
CP1
11-BIT R1
COUNTER
2-BIT
CP2
11-BIT R2
COUNTER
Figure 5. 3-Wire Control Block Diagram
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX2306ETI+

Mfr. #:
Buy MAX2306ETI+
Manufacturer:
Maxim Integrated
Description:
Modulator / Demodulator CDMA If VGAs & I/Q Demodulator w/VCO
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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