19-4386; Rev 1; 8/10
KIT
ATION
EVALU
BLE
AVAILA
300MHz to 450MHz ASK Receiver
with Internal IF Filter
Features
o
ASK/OOK Modulation
o
< 250µs Enable Turn-On Time
o
On-Chip PLL, VCO, Mixer, IF, Baseband
o
Low IF (200kHz Nominal)
o
5.5mA DC Current
o
1µA Standby Current
o
3.3V/5V Operation
o
Small 20-Pin Thin QFN Package with an Exposed
Pad
General Description
The MAX7036 low-cost receiver is designed to receive
amplitude-shift-keyed (ASK) and on-off-keyed (OOK)
data in the 300MHz to 450MHz frequency range. The
receiver has an RF input signal range of -109dBm to
0dBm.
The MAX7036 requires few external components and
has a power-down pin to put it in a low-current sleep
mode, making it ideal for cost- and power-sensitive
applications. The low-noise amplifier (LNA), phase-
locked loop (PLL), mixer, IF filter, received-signal-
strength indicator (RSSI), and baseband sections are
all on-chip. The MAX7036 uses a very-low intermediate
frequency (VLIF) architecture. The MAX7036 integrates
the IF filter on-chip and therefore eliminates an external
ceramic filter, reducing the bill-of-materials cost. The
device also contains an on-chip automatic gain control
(AGC) that reduces the LNA gain by 30dB when the
input signal power is large. The MAX7036 operates
from either a 5V or a 3.3V power supply and draws
5.5mA (typ) of current.
The MAX7036 is available in a 20-pin thin QFN pack-
age with an exposed pad and is specified over the
AEC-Q100 Level 2 (-40°C to +105°C) temperature
range.
MAX7036
Ordering Information
PART
MAX7036GTP/V+
TEMP RANGE
-40°C to +105°C
PIN-PACKAGE
20 Thin QFN-EP*
/Vdenotes
an automotive qualified part.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Pin Configuration
DCOC
DVDD
12
DFFB
IFC3
11
OPP
14
TOP VIEW
Applications
Low-Cost RKE
Garage Door Openers
Remote Controls
Home Automation
Sensor Networks
Security Systems
DSP 16
DSN 17
PDOUT 18
V
DD
19
DATAOUT 20
15
13
10
9
IFC1
IFC2
MIXIN1
MIXIN2
LNAOUT
MAX7036
8
7
+
1
ENABLE
2
XTAL2
3
XTAL1
4
AVDD
EP
6
5
LNAIN
THIN QFN
5mm x 5mm
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
300MHz to 450MHz ASK Receiver
with Internal IF Filter
MAX7036
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ...........................................................-0.3V to +6.0V
AVDD to GND........................................................-0.3V to +4.0V
DVDD to GND........................................................-0.3V to +4.0V
ENABLE to GND.........................................-0.3V to (V
DD
+ 0.3V)
LNAIN to GND .......................................................-0.3V to +1.2V
All Other Pins to GND.............................-0.3V to (V
DVDD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TQFN (derate 20.8mW/°C above +70°C) ....1666.7mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
20-Pin TQFN...................................................................2°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
20-Pin TQFN.................................................................48°C/W
Operating Temperature Range .........................-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a single-
layer board. For detailed information on package thermal considerations, go to
www.maxim-ic.com/thermal-tutorial.
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.
3.3V DC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit,
50Ω system impedance, V
AVDD
= V
DVDD
= V
DD
= 3.0V to 3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to
+105°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
DD
= 3.3V, T
A
= +25°C, unless otherwise noted.) (100%
tested at T
A
= +105°C.)
PARAMETER
Supply Voltage
SYMBOL
V
DD
CONDITIONS
V
AVDD
= V
DVDD
= V
DD
f
RF
= 315MHz
Supply Current
I
IN
T
A
< +105°C
f
RF
= 433MHz
Deep-sleep mode,
V
ENABLE
= 0V
V
DD
-
0.4
0.4
20
0.4
V
DD
-
0.4
MIN
3.0
TYP
3.3
5.3
5.8
1
MAX
3.6
6.7
7.3
2.7
UNITS
V
mA
μA
DIGITAL INPUT (ENABLE)
Input High Voltage
Input Low Voltage
Input Current
DIGITAL OUTPUT (DATAOUT)
Output Low Voltage
Output High Voltage
V
OL
V
OH
I
SINK
= 100μA
I
SOURCE
= 100μA
V
V
V
IH
V
IL
I
ENABLE
V
AVDD
= V
DVDD
= V
DD
V
AVDD
= V
DVDD
= V
DD
0
≤
V
ENABLE
≤
V
DD
V
V
μA
2
_______________________________________________________________________________________
300MHz to 450MHz ASK Receiver
with Internal IF Filter
5.0V DC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit,
50Ω system impedance, V
DD
= 4.5V to 5.5V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to +105°C, unless
otherwise noted. Typical values are at V
DD
= 5.0V, T
A
= +25°C, unless otherwise noted.) (100% tested at T
A
= +105°C.)
PARAMETER
Supply Voltage
SYMBOL
V
DD
f
RF
= 315MHz
Supply Current
I
IN
T
A
< +105°C
f
RF
= 433MHz
Deep-sleep mode,
V
ENABLE
= 0V
V
DD
-
0.4
0.4
20
0.4
V
DD
-
0.4
CONDITIONS
MIN
4.5
TYP
5.0
5.4
5.9
1
MAX
5.5
6.8
7.4
3.4
UNITS
V
mA
μA
MAX7036
DIGITAL INPUT (ENABLE)
Input High Voltage
Input Low Voltage
Input Current
DIGITAL OUTPUT (DATAOUT)
Output Low Voltage
Output High Voltage
V
OL
V
OH
I
SINK
= 100μA
I
SOURCE
= 100μA
V
V
V
IH
V
IL
I
ENABLE
V
AVDD
= V
DVDD
V
AVDD
= V
DVDD
0
≤
V
ENABLE
≤
V
DD
V
V
μA
AC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit,
50Ω system impedance, V
AVDD
= V
DVDD
= V
DD
= 3.0V to 3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to
+105°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
DD
= 3.3V, T
A
= +25°C, f
RF
= 315MHz, unless otherwise
noted.) (100% tested at T
A
= +105°C.)
PARAMETER
Receiver Input Frequency Range
Maximum Receiver Input Level
Sensitivity (Note 2)
SYMBOL
f
RF
P
RFIN
f
RF
= 315MHz
f
RF
= 433MHz
Time for valid RSSI
output, does not
include baseband
filter settling
Enable power on
(V
DD
> 3.0V)
V
DD
power on
CONDITIONS
MIN
300
0
-109
-107
250
1
5
13
TYP
MAX
450
UNITS
MHz
dBm
dBm
μs
ms
dB
ms
Power-On Time
t
ON
AGC Hysteresis
AGC Low Gain-to-High Gain
Switching Time
_______________________________________________________________________________________
3
300MHz to 450MHz ASK Receiver
with Internal IF Filter
MAX7036
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical
Application Circuit,
50Ω system impedance, V
AVDD
= V
DVDD
= V
DD
= 3.0V to 3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to
+105°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
DD
= 3.3V, T
A
= +25°C, f
RF
= 315MHz, unless otherwise
noted.) (100% tested at T
A
= +105°C.)
PARAMETER
LNA/MIXER
f
RF
= 315MHz
LNA Input Impedance
Z
INLNA
Normalized to 50Ω
f
RF
= 433MHz
LO Signal Feedthrough to
Antenna
Voltage Gain Reduction
LNA/Mixer Voltage Gain
3dB Cutoff Frequency
RSSI Linearity
RSSI Dynamic Range
RSSI Level
Intermediate Frequency
Maximum Data-Filter Bandwidth
Maximum Data-Slicer Bandwidth
Maximum Peak Detector
Bandwidth
Maximum Data Rate
Crystal Frequency
Crystal Load Capacitance
f
XTAL
C
LOAD
Manchester coded
Nonreturn to zero (NRZ)
9.36
10
f
IF
BW
DF
BW
DS
Includes AGC
P
RFIN
< -120dBm
P
RFIN
> 0dBm, AGC enabled
BW
IF
Low-gain mode, AGC enabled
High-gain LNA mode
Low-gain LNA mode
Set by capacitors on IFC1 and IFC2 (see
the
Typical Application Circuit)
0.4 -
j4.0
-75
29
55
26
400
±0.5
80
1.34
2.35
200
50
100
50
33
66
14.06
0.4 -
j5.6
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Ω
dBm
dB
dB
kHz
dB
dB
V
kHz
kHz
kHz
kHz
kbps
MHz
pF
Note 2:
BER = 2 x 10
-3
, Manchester coded, data rate = 4kbps. IF bandwidth = 400kHz.
4
_______________________________________________________________________________________
300MHz to 450MHz ASK Receiver
with Internal IF Filter
Typical Operating Characteristics
(Typical
Application Circuit,
V
AVDD
= V
DD
= V
DVDD
= 3.3V, f
RF
= 315MHz, T
A
= +25°C, unless otherwise noted.)
MAX7036
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(3.3V OPERATION)
MAX7036 toc01
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(5.0V OPERATION)
5.0V APPLICATION CIRCUIT
T
A
= +105°C
T
A
= +85°C
MAX7036 toc02
SUPPLY CURRENT vs. RF FREQUENCY
P
RF
= -80dBm
6.5
SUPPLY CURRENT (mA)
6.0
5.5
5.0
4.5
4.0
T
A
= +25° T = -40°C
A
T
A
= +85°C
T
A
= +105°C
MAX7036 toc03
5.5
V
AVDD
= V
DVDD
= V
DD
5.4
SUPPLY CURRENT (mA)
5.3
5.2
T
A
= +105°C
5.1
5.0
4.9
T
A
= -40°C
4.8
3.0
3.1
3.2
3.3
3.4
3.5
T
A
= +25°C
T
A
= +85°C
5.45
5.40
SUPPLY CURRENT (mA)
5.35
5.30
5.25
5.20
5.15
5.10
5.05
5.00
7.0
T
A
= +25°
T
A
= -40°C
3.6
4.5
4.7
4.9
5.1
5.3
5.5
250
300
350
400
450
500
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
RF FREQUENCY (MHz)
BIT ERROR RATE vs. PEAK RF
INPUT POWER
MAX7036 toc04
SENSITIVITY vs. TEMPERATURE
BER = 0.2%
-106.5 DATA RATE = 4kbps
MANCHESTER
-107.0
SENSITIVITY (dBm)
-107.5
-108.0
-108.5
-109.0
-109.5
1.4
-110.0
-110.5
1.2
-120
f
RF
= 433MHz
f
RF
= 315MHz
RSSI (V)
MAX7036 toc05
RSSI vs. INPUT POWER
f
RF
= 433MHz
f
IF
= 200kHz
MAX7036 toc06
100
f
RF
= 433MHz
10
BIT ERROR RATE (%)
f
RF
= 315MHz
1
-106.0
2.4
2.2
2.0
1.8
1.6
0.1
0.01
0.001
-125
-120
-115
-110
-105
-40
-15
10
35
60
85
105
-100
-80
-60
-40
-20
0
PEAK RF INPUT POWER (dBm)
TEMPERATURE (°C)
INPUT POWER (dBm)
LNA/MIXER VOLTAGE GAIN
vs. IF FREQUENCY
MAX7036 toc07
S
11
SMITH CHART PLOT OF RFIN
(315MHz CIRCUIT)
MAX7036 toc08
S
11
SMITH CHART PLOT OF RFIN
(433MHz CIRCUIT)
MAX7036 toc09
60
58
LNA/MIXER VOLTAGE GAIN (dB)
56
54
52
50
48
46
44
42
40
0
200
400
600
800
P
RF
= -71dBm
f
RF
= 433.92MHz
S
11
= 7.9729Ω - j0.6085Ω
at f
RF
= 315MHz
S
11
= 6.5175Ω - j5.5849Ω
at f
RF
= 433MHz
1000
IF FREQUENCY (kHz)
_______________________________________________________________________________________
5
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