Operating Temperature Range ......................... -40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10s) ................................. +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
DC Electrical Characteristics
(Typical Application Circuit, all RF inputs and outputs are referenced to 50Ω, V
DD
= 2.1V to 3.6V, V
ENABLE
= V
DD
. T
A
= -40°C to
+125°C, unless otherwise noted. Min and Max values are 100% tested at T
A
= +125°C and are guaranteed by design and character-
ization over temperature, unless otherwise noted. Typical values are at V
DD
= +2.7V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage
SYMBOL
V
DD
PA off, V
DIN
at
0% duty cycle
(ASK or FSK)
Supply Current
I
DD
V
DIN
at 50%
duty cycle (ASK)
(Notes 2, 3)
V
DIN
at 100%
duty cycle (FSK)
Standby Current
DIGITAL INPUTS AND OUTPUTS
Data Input High
Data Input Low
Maximum Input Current
Output Voltage High
Output Voltage Low
V
IH
V
IL
I
IN
V
OH
V
OL
CLKOUT, load = 10kΩ || 10pF (Note 3)
CLKOUT, load = 10kΩ || 10pF (Note 3)
V
DD
-
0.25
0.25
20
V
DD
-
0.25
0.25
V
V
µA
V
V
I
STDBY
V
ENABLE
< V
IL
f
RF
= 315MHz
f
RF
= 433MHz
f
RF
= 315MHz
f
RF
= 433MHz
f
RF
= 315MHz
f
RF
= 433MHz (Note 3)
T
A
= +25°C
T
A
< +85°C (Note 3)
T
A
< +125°C
CONDITIONS
MIN
2.1
2.9
3.3
6.7
7.3
10.5
11.4
0.2
120
700
300
1600
nA
TYP
MAX
3.6
4.3
4.8
10.7
11.4
17.1
18.1
mA
UNITS
V
www.maximintegrated.com
Maxim Integrated
│
2
MAX1479
300MHz to 450MHz Low-Power,
Crystal-Based +10dBm ASK/FSK Transmitter
AC Electrical Characteristics
(Typical Application Circuit, all RF inputs and outputs are referenced to 50Ω, V
DD
= 2.1V to 3.6V, V
ENABLE
= V
DD
. T
A
= -40°C to
+125°C, unless otherwise noted. Min and Max values are 100% tested at T
A
= +125°C and are guaranteed by design and character-
ization over temperature, unless otherwise noted. Typical values are at V
DD
= +2.7V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYSTEM PERFORMANCE
Frequency Range
Turn-On Time (Note 4)
Maximum Data Rate (Note 3)
Maximum FSK Frequency
Deviation
Output Power
Transmit Efficiency with CW Tone
(Note 6)
Transmit Efficiency at 50% Duty
Cycle
PHASE-LOCKED-LOOP PERFORMANCE
VCO Gain
K
VCO
f
RF
= 315MHz
Phase Noise
f
RF
= 433MHz
Maximum Carrier Harmonics
Reference Spur
Loop Bandwidth
Crystal Frequency Range
Crystal Tolerance
Crystal Load Capacitance
Clock Output Frequency
Note
Note
Note
Note
Note
Note
Note
1:
2:
3:
4:
5:
6:
7:
C
LOAD
(Note 7)
Determined by CLK0 and CLK1;
see Table 1
BW
f
XTAL
f
RF
= 315MHz
f
RF
= 433MHz
f
OFFSET
= 100kHz
f
OFFSET
= 1MHz
f
OFFSET
= 100kHz
f
OFFSET
= 1MHz
280
-75
-98
-74
-98
-50
-45
-40
300
F
RF
/32
50
4.5
F
XTAL
/N
dBc
dBc
kHz
MHz
ppm
pF
MHz
dBc/Hz
MHz/V
P
OUT
f
RF
t
ON
Settle to within 50kHz
Settle to within 5kHz
ASK mode (Manchester coded)
FSK mode (Manchester coded)
DEV[2:0] = 111
(Note 5)
f
RF
= 315MHz
f
RF
= 433MHz
6.8
2.7
300
200
350
100
20
55
80
10
5.3
12.2
35
34
27
25
16.1
%
%
12.0
dBm
450
MHz
µs
kbps
kHz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
T
A
= +25°C, V
DD
= +2.7V
T
A
= +125°C, V
DD
= +2.1V
T
A
= -40°C, V
DD
= +3.6V
f
RF
= 315MHz
f
RF
= 433MHz
f
RF
= 315MHz
f
RF
= 433MHz
Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match.
50% duty cycle at 10kHz ASK data (Manchester coded).
Guaranteed by design and characterization, not production tested.
V
ENABLE
= V
IL
to V
ENABLE
= V
IH
. f
OFFSET
is defined as the frequency deviation from the desired carrier frequency.
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