MAX1479 Maxim, MAX1479 Datasheet - Page 3

• Manufacturer Part Number: MAX1479
• Description: 300MHz to 450MHz Low-Power / Crystal-Based +10dBm ASK/FSK Transmitter
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, all RF inputs and outputs are referenced to 50Ω, V
+125°C, unless otherwise noted. Typical values are at V
Note 1: Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match.
Note 2: 100% tested at T
Note 3: 50% duty cycle at 10kHz ASK data (Manchester coded).
Note 4: Guaranteed by design and characterization, not production tested.
Note 5: V
Note 6: Dependent on crystal and PC board trace capacitance.
Note 7: V
Note 8: Dependent on PC board trace capacitance.
SYSTEM PERFORMANCE
Frequency Range
Turn-On Time (Note 5)
Maximum Data Rate (Note 4)
Maximum FSK Frequency
Deviation
Output Power (Note 2)
Transmit Efficiency with CW Tone
(Note 7)
Transmit Efficiency at 50% Duty
Cycle
PHASE-LOCKED-LOOP PERFORMANCE
VCO Gain
Phase Noise
Maximum Carrier Harmonics
Reference Spur
Loop Bandwidth
Crystal Frequency Range
Crystal Tolerance
Crystal Load Capacitance
Clock Output Frequency
Crystal-Based +10dBm ASK/FSK Transmitter
ENABLE
ENABLE
PARAMETER
= V
> V
_______________________________________________________________________________________
IL
IH
, V
to V
A
DATA
= +125°C. Guaranteed by design and characterization over temperature.
ENABLE
> V
IH
= V
, Efficiency = P
SYMBOL
C
IH
P
K
f
XTAL
t
BW
LOAD
f
OUT
VCO
ON
. f
RF
OFFSET
300MHz to 450MHz Low-Power,
(Note 2)
Settle to within 50kHz
Settle to within 5kHz
ASK mode (Manchester coded)
FSK mode (Manchester coded)
DEV[2:0] = 111
(Note 6)
T
T
T
f
f
f
f
f
f
f
f
(Note 8)
D eter m i ned b y C LK0 and C LK1; see Tab l e 1
RF
RF
RF
RF
RF
RF
RF
RF
is defined as the frequency deviation from the desired carrier frequency.
A
A
A
OUT
= +25°C, V
= +125°C, V
= -40°C, V
= 315MHz
= 433MHz
= 315MHz
= 433MHz
= 315MHz
= 433MHz
= 315MHz
= 433MHz
DD
/ (V
= +2.7V, T
DD
DD
x I
DD
CONDITIONS
DD
DD
= +3.6V
= +2.7V
= +2.1V
).
f
f
f
f
A
OFFSET
OFFSET
OFFSET
OFFSET
f
f
= +25°C, unless otherwise noted.) (Note 1)
RF
RF
= 315MHz
= 433MHz
= 100kHz
= 1MHz
= 100kHz
= 1MHz
DD
= +2.1V to +3.6V, V
MIN
300
6.8
2.7
ENABLE
F
XTAL
f
RF
TYP
12.2
200
350
100
280
300
5.3
-75
-98
-74
-98
-50
-45
-40
4.5
20
55
80
10
35
34
27
25
50
/32
/ N
= V
DD
MAX
12.0
16.1
450
, T
A
= -40°C to
dBc/Hz
UNITS
MHz/V
kbps
MHz
dBm
MHz
ppm
MHz
dBc
dBc
kHz
kHz
pF
µs
%
%
3