General Description
The MAX7030 crystal-based, fractional-N transceiver is
designed to transmit and receive ASK/OOK data at fac-
tory-preset carrier frequencies of 315MHz, 345MHz
, or
433.92MHz with data rates up to 33kbps (Manchester
encoded) or 66kbps (NRZ encoded). This device gen-
erates a typical output power of +10dBm into a 50
load, and exhibits typical sensitivity of -114dBm. The
MAX7030 features separate transmit and receive pins
(PAOUT and LNAIN) and provides an internal RF switch
that can be used to connect the transmit and receive
pins to a common antenna.
The MAX7030 transmit frequency is generated by a 16-
bit, fractional-N, phase-locked loop (PLL), while the
receiver's local oscillator (LO) is generated by an inte-
ger-N PLL. This hybrid architecture eliminates the need
for separate transmit and receive crystal reference
oscillators because the fractional-N PLL is preset to be
10.7MHz above the receive LO. Retaining the fixed-N
PLL for the receiver avoids the higher current-drain
requirements of a fractional-N PLL and keeps the
receiver current drain as low as possible. All frequency-
generation components are integrated on-chip, and
only a crystal, a 10.7MHz IF filter, and a few discrete
components are required to implement a complete
antenna/digital data solution.
The MAX7030 is available in a small, 5mm x 5mm, 32-
pin thin QFN package, and is specified to operate over
the automotive -40C to +125C temperature range.
Consult factory for availability.
Applications
2-Way Remote Keyless Entry
Security Systems
Home Automation
Remote Controls
Remote Sensing
Smoke Alarms
Garage Door Openers
Local Telemetry Systems
Features
+2.1V to +3.6V or +4.5V to +5.5V Single-Supply
Operation
Single-Crystal Transceiver
Factory-Preset Frequency (No Serial Interface
Required)
ASK/OOK Modulation
+10dBm Output Power into 50 Load
Integrated TX/RX Switch
Integrated Transmit and Receive PLL, VCO, and
Loop Filter
> 45dB Image Rejection
Typical RF Sensitivity*: -114dBm
Selectable IF Bandwidth with External Filter
< 12.5mA Transmit-Mode Current
< 6.7mA Receive-Mode Current
< 800nA Shutdown Current
Fast-On Startup Feature, <250s
Small, 32-Pin, Thin QFN Package
MAX7030
Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3706; Rev 0; 5/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
MAX7030_ATJ -40
C to +125C 32 Thin QFN-EP** T3255-3
Product Selector Guide
PART
CARRIER FREQUENCY (MHz)
MAX7030LATJ
315
MAX7030MATJ
345
MAX7030HATJ
433.92
*0.2% BER, 4kbps Manchester-encoded data, 280kHz IF BW
**EP = Exposed paddle.
Note: The MAX7030 is available with factory-preset operating
frequencies. See the Product Selector Guide for complete part
numbers.
Pin Configuration, Typical Application Circuit, and
Functional Diagram appear at end of data sheet.
MAX7030
Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
HV
IN
to GND..........................................................-0.3V to +6.0V
PAV
DD
, AV
DD
, DV
DD
to GND ................................-0.3V to +4.0V
ENABLE, T/R, DATA, AGC0, AGC1,
AGC2 to GND .......................................-0.3V to (HV
IN
+ 0.3V)
All Other Pins to GND ...............................-0.3V to (_V
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70C)
32-Pin Thin QFN (derate 21.3mW/C
above +70C).............................................................1702mW
Operating Temperature Range .........................-40C to +125C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
DC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, 50
system impedance, AV
DD
= DV
DD
= HV
IN
= PAV
DD
= +2.1V to +3.6V, f
RF
= 315MHz, 345MHz, or
433.92MHz, T
A
= -40C to +125C, unless otherwise noted. Typical values are at AV
DD
= DV
DD
= HV
IN
= PAV
DD
= +2.7V, T
A
= +25C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage (3V Mode)
V
DD
HV
IN
, PAV
DD
, AV
DD
, and DV
DD
connected
to power supply
2.1
2.7
3.6
V
Supply Voltage (5V Mode)
HV
IN
PAV
DD
, AV
DD
, and DV
DD
unconnected
from HV
IN
, but connected together
4.5
5.0
5.5
V
f
RF
= 315MHz
3.5
5.4
Transmit mode, PA off,
V
DATA
at 0% duty
cycle (Note 2)
f
RF
= 434MHz
4.3
6.7
f
RF
= 315MHz
7.6
12.3
Transmit mode, V
DATA
at 50% duty cycle
(Notes 3, 4)
f
RF
= 434MHz
8.4
13.6
f
RF
= 315MHz
11.6
19.1
Transmit mode, V
DATA
at 100% duty cycle
(Note 2)
f
RF
= 434MHz
12.4
20.4
Receiver 315MHz
6.1
7.9
Receiver 434MHz
6.4
8.3
mA
Deep-sleep
(3V mode)
0.8
8.8
T
A
< +85C,
typ at +25C
(Note 4)
Deep-sleep
(5V mode)
2.4
10.9
A
Receiver 315MHz
6.4
8.2
Receiver 434MHz
6.7
8.4
mA
Deep-sleep
(3V mode)
8.0
34.2
Supply Current
I
DD
T
A
< +125C,
typ at +125C
(Note 2)
Deep-sleep
(5V mode)
14.9
39.3
A
Voltage Regulator
V
REG
HV
IN
= 5V, I
LOAD
= 15mA
3.0
V
DIGITAL I/O
Input-High Threshold
V
IH
(Note 2)
0.9 x
HV
IN
V
Input-Low Threshold
V
IL
(Note 2)
0.1 x
HV
IN
V
MAX7030
Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL
_______________________________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, 50
system impedance, PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.1V to +3.6V, f
RF
= 315MHz, 345MHz, or
433.92MHz, T
A
= -40C to +125C, unless otherwise noted. Typical values are at PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.7V, T
A
= +25C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL CHARACTERISTICS
Frequency Range
315/345/
433.92
MHz
Maximum Input Level
P
RFIN
0
dBm
f
RF
= 315MHz (Note 6)
32
Transmit Efficiency 100% Duty
Cycle
f
RF
= 434MHz (Note 6)
30
%
f
RF
= 315MHz (Note 6)
24
Transmit Efficiency 50% Duty
Cycle
f
RF
= 434MHz (Note 6)
22
%
ENABLE or T/R transition low to high,
transmitter frequency settled to within
50kHz of the desired carrier
200
ENABLE or T/R transition low to high,
transmitter frequency settled to within 5kHz
of the desired carrier
350
Power-On Time
t
ON
ENABLE transition low to high, or T/R
transition high to low, receiver startup time
(Note 5)
250
s
RECEIVER
315MHz
-114
Sensitivity
0.2% BER, 4kbps Manchester
data rate, 280kHz IF BW,
average RF power
434MHz
-113
dBm
Image Rejection
46
dB
POWER AMPLIFIER
T
A
= +25
C (Note 4)
4.6
10.0
15.5
T
A
= +125
C, PAV
DD
= AV
DD
= DV
DD
=
HV
IN
= +2.1V (Note 2)
3.9
6.7
Output Power
P
OUT
T
A
= -40
C, PAV
DD
= AV
DD
= DV
DD
=
HV
IN
= +3.6V (Note 4)
13.1
15.8
dBm
Modulation Depth
82
dB
Maximum Carrier Harmonics
With output-matching network
-40
dBc
Reference Spur
-50
dBc
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50
system impedance, AV
DD
= DV
DD
= HV
IN
= PAV
DD
= +2.1V to +3.6V, fRF = 315MHz, 345MHz, or
433.92MHz, T
A
= -40C to +125C, unless otherwise noted. Typical values are at AV
DD
= DV
DD
= HV
IN
= PAV
DD
= +2.7V, T
A
= +25C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Pulldown Sink Current
AGC0-2, ENABLE, T/R, DATA (HV
IN
= 5.5V)
20
A
Output-Low Voltage
V
OL
I
SINK
= 500A
0.15
V
Output-High Voltage
V
OH
I
SOURCE
= 500A
H V
IN
- 0.26
V
MAX7030
Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL
4
_______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50
system impedance, PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.1V to +3.6V, f
RF
= 315MHz, 345MHz, or
433.92MHz, T
A
= -40C to +125C, unless otherwise noted. Typical values are at PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.7V, T
A
= +25C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
PHASE-LOCKED LOOP
Transmit VCO Gain
K
VCO
340
MHz/V
10kHz offset, 200kHz loop BW
-68
Transmit PLL Phase Noise
1MHz offset, 200kHz loop BW
-98
dBc/Hz
Receive VCO Gain
340
MHz/V
10kHz offset, 500kHz loop BW
-80
Receive PLL Phase Noise
1MHz offset, 500kHz loop BW
-90
dBc/Hz
Transmit PLL
200
Loop Bandwidth
Receive PLL
500
kHz
Reference Frequency Input Level
0.5
V
P-P
LOW-NOISE AMPLIFIER/MIXER (Note 8)
f
RF
= 315MHz
1 - j4.7
LNA Input Impedance
Z
INLNA
Normalized to 50
f
RF
= 434MHz
1- j3.3
f
RF
= 315MHz
50
High-gain state
f
RF
= 434MHz
45
f
RF
= 315MHz
13
Voltage-Conversion Gain
Low-gain state
f
RF
= 434MHz
9
dB
High-gain state
-42
Input-Referred, 3rd-Order
Intercept Point
IIP3
Low-gain state
-6
dBm
Mixer-Output Impedance
330
LO Signal Feedthrough to
Antenna
-100
dBm
RSSI
Input Impedance
330
Operating Frequency
f
IF
10.7
MHz
3dB Bandwidth
10
MHz
Gain
15
mV/dB
ANALOG BASEBAND
Maximum Data-Filter Bandwidth
50
kHz
Maximum Data-Slicer Bandwidth
100
kHz
Maximum Peak-Detector
Bandwidth
50
kHz
Manchester coded
33
Maximum Data Rate
Nonreturn to zero (NRZ)
66
kbps
MAX7030
Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL
_______________________________________________________________________________________
5
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50
system impedance, PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.1V to +3.6V, f
RF
= 315MHz, 345MHz, or
433.92MHz, T
A
= -40C to +125C, unless otherwise noted. Typical values are at PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.7V, T
A
= +25C,
unless otherwise noted.) (Note 1)
Note 1:
Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match.
Note 2:
100% tested at T
A
= +125C. Guaranteed by design and characterization overtemperature.
Note 3:
50% duty cycle at 10kHz ASK data (Manchester coded).
Note 4:
Guaranteed by design and characterization. Not production tested.
Note 5:
Time for final signal detection; does not include baseband filter settling.
Note 6:
Efficiency = P
OUT
/ (V
DD
x I
DD
).
Note 7:
Dependent on PC board trace capacitance.
Note 8:
Input impedance is measured at the LNAIN pin. Note that the impedance at 315MHz includes the 12nH
inductive degeneration from the LNA source to ground. The impedance at 434MHz includes a 10nH induc-
tive degeneration connected from the LNA source to ground. The equivalent input circuit is 50
in series
with ~2.2pF. The voltage conversion is measured with the LNA input-matching inductor, the degeneration
inductor, and the LNA/mixer tank in place, and does not include the IF filter insertion loss.
Typical Operating Characteristics
(Typical Operating Circuit, PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +3.0V, f
RF
= 433.92MHz, IF BW = 280kHz, 4kbps Manchester encoded,
0.2% BER, T
A
= +25C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX7030 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.3
3.0
2.7
2.4
5.8
6.0
6.2
6.4
6.6
6.8
7.0
5.6
2.1
3.6
+85
C
+125
C
+25
C
-40
C
SUPPLY CURRENT vs. RF FREQUENCY
MAX7030 toc02
RF FREQUENCY (MHz)
SUPPLY CURRENT (mA)
425
400
325
350
375
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.0
300
450
+85
C
+125
C
+25
C
-40
C
DEEP-SLEEP CURRENT vs. TEMPERATURE
MAX7030 toc03
TEMPERATURE (
C)
DEEP-SLEEP CURRENT (
A)
110
85
35
60
-10
-15
2
4
6
8
10
12
14
16
18
0
-40
V
CC
= +3.6V
V
CC
= +3.0V
V
CC
= +2.1V
RECEIVER
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CRYSTAL OSCILLATOR
Crystal Frequency
f
XTAL
(f
RF
-10.7)
/ 24
MHz
Maximum Crystal Inductance
50
mH
Frequency Pulling by V
DD
2
ppm/V
Crystal Load Capacitance
(Note 7)
4.5
pF
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