Rainbow Electronics MAX7030 User Manual

General Description

The MAX7030 crystal-based, fractional-N transceiver is
designed to transmit and receive ASK/OOK data at fac­tory-preset carrier frequencies of 315MHz, 345MHz†, or

433.92MHz with data rates up to 33kbps (Manchester
encoded) or 66kbps (NRZ encoded). This device gen­erates a typical output power of +10dBm into a 50Ω
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 16­bit, fractional-N, phase-locked loop (PLL), while the
receiver’s local oscillator (LO) is generated by an inte­ger-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 frequency­generation 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, 32­pin thin QFN package, and is specified to operate over
the automotive -40°C to +125°C 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 50Ω 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, <250µs

♦ 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

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.

-40°C to +125°C 32 Thin QFN-EP**

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.

HVINto GND..........................................................-0.3V to +6.0V

PAV

DD

, AVDD, DVDDto 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

= +70°C)
32-Pin Thin QFN (derate 21.3mW/°C

above +70°C).............................................................1702mW

Operating Temperature Range .........................-40°C to +125°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

DC ELECTRICAL CHARACTERISTICS

(Typical Application Circuit, 50Ω system impedance, AVDD= DVDD= HVIN= PAVDD= +2.1V to +3.6V, fRF= 315MHz, 345MHz, or

433.92MHz, T

A

= -40°C to +125°C, unless otherwise noted. Typical values are at AVDD= DVDD= HVIN= PAVDD= +2.7V, TA= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

CONDITIONS

UNITS

Supply Voltage (3V Mode) V

DD

HVIN, PAVDD, AVDD, and DVDD connected
to power supply

2.1 2.7 3.6 V

Supply Voltage (5V Mode) HV

IN

PAVDD, AVDD, and DVDD unconnected
from HV

IN

, but connected together

4.5 5.0 5.5 V

fRF = 315MHz 3.5 5.4

Transmit mode, PA off,
V

DATA

at 0% duty

cycle (Note 2)

f

RF

= 434MHz 4.3 6.7

fRF = 315MHz 7.6

Transmit mode, V

DATA

at 50% duty cycle
(Notes 3, 4)

f

RF

= 434MHz 8.4

fRF = 315MHz

Transmit mode, V

DATA

at 100% duty cycle
(Note 2)

f

RF

= 434MHz

6.1 7.9

6.4 8.3

mA

Deep-sleep
(3V mode)

0.8 8.8

TA < +85°C,
typ at +25°C
(Note 4)

Deep-sleep
(5V mode)

2.4

µA

6.4 8.2

6.7 8.4

mA

Deep-sleep
(3V mode)

8.0

Supply Current I

DD

TA < +125°C,
typ at +125°C
(Note 2)

Deep-sleep
(5V mode)

µA

Voltage Regulator V

REG

HVIN = 5V, I

LOAD

= 15mA 3.0 V

DIGITAL I/O

Input-High Threshold V

IH

(Note 2)

V

Input-Low Threshold V

IL

(Note 2)

0.1 x
V

SYMBOL

MIN TYP MAX

Receiver 315MHz

Receiver 434MHz

Receiver 315MHz

Receiver 434MHz

11.6 19.1

12.4 20.4

0.9 x
HV

14.9 39.3

IN

12.3

13.6

10.9

34.2

HV

IN

MAX7030

Low-Cost, 315MHz, 345MHz, and 433.92MHz

ASK Transceiver with Fractional-N PLL

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(Typical Application Circuit, 50Ω system impedance, PAVDD= AVDD= DVDD= HVIN= +2.1V to +3.6V, fRF= 315MHz, 345MHz, or

433.92MHz, T

A

= -40°C to +125°C, unless otherwise noted. Typical values are at PAVDD= AVDD= DVDD= HVIN= +2.7V, TA= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL CHARACTERISTICS

Frequency Range

MHz

Maximum Input Level P

RFIN

0

dBm

fRF = 315MHz (Note 6) 32

Transmit Efficiency 100% Duty
Cycle

f

RF

= 434MHz (Note 6) 30

%

fRF = 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

ENABLE or T/R transition low to high,
transmitter frequency settled to within 5kHz
of the desired carrier

Power-On Time t

ON

ENABLE transition low to high, or T/R
transition high to low, receiver startup time
(Note 5)

µs

RECEIVER

Sensitivity

0.2% BER, 4kbps Manchester
data rate, 280kHz IF BW,
average RF power

dBm

Image Rejection 46 dB

POWER AMPLIFIER

TA = +25°C (Note 4) 4.6
TA = +125°C, PAVDD = AVDD = DVDD =
HV

IN

= +2.1V (Note 2)

3.9 6.7

Output Power P

OUT

TA = -40°C, PAVDD = AVDD = DVDD =
HV

IN

= +3.6V (Note 4)

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, 50Ω system impedance, AVDD= DVDD= HVIN= PAV

DD

=

+2.1V to +3.6V, fRF= 315MHz, 345MHz, or

433.92MHz, T

A

= -40°C to +125°C, unless otherwise noted. Typical values are at AVDD= DVDD= HVIN= PAV

DD

=

+2.7V, T

A

= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Pulldown Sink Current

20 µA

Output-Low Voltage V

OL

I

SINK

= 500µA

V

Output-High Voltage V

OH

I

SOURCE

= 500µA H V

IN

- 0.26 V

AGC0-2, ENABLE, T/R, DATA (HVIN = 5.5V)

0.15

315/345/

433.92

315MHz -114

434MHz -113

200

350

250

10.0 15.5

13.1 15.8

MAX7030

Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, 50Ω system impedance, PAVDD= AVDD= DVDD= HVIN= +2.1V to +3.6V, fRF= 315MHz, 345MHz, or

433.92MHz, T

A

= -40°C to +125°C, unless otherwise noted. Typical values are at PAVDD= AVDD= DVDD= HVIN= +2.7V, TA= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

CONDITIONS

UNITS

PHASE-LOCKED LOOP

Transmit VCO Gain K

VCO

MHz/V

10kHz offset, 200kHz loop BW -68

Transmit PLL Phase Noise

1MHz offset, 200kHz loop BW -98

dBc/Hz

Receive VCO Gain

MHz/V

10kHz offset, 500kHz loop BW -80

Receive PLL Phase Noise

1MHz offset, 500kHz loop BW -90

dBc/Hz

Transmit PLL

Loop Bandwidth

Receive PLL

kHz

Reference Frequency Input Level

0.5 V

P-P

LOW-NOISE AMPLIFIER/MIXER (Note 8)

fRF = 315MHz

LNA Input Impedance Z

INLNA

fRF = 434MHz

fRF = 315MHz 50

High-gain state

f

RF

= 434MHz 45

fRF = 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

Ω

LO Signal Feedthrough to
Antenna

dBm

RSSI

Input Impedance

Ω

Operating Frequency f

IF

MHz

3dB Bandwidth 10 MHz

Gain 15

mV/dB

ANALOG BASEBAND

Maximum Data-Filter Bandwidth 50 kHz

Maximum Data-Slicer Bandwidth

kHz

Maximum Peak-Detector
Bandwidth

50 kHz

Manchester coded 33

Maximum Data Rate

Nonreturn to zero (NRZ) 66

kbps

SYMBOL

MIN TYP MAX

340

340

200

500

Normalized to 50Ω

1 - j4.7

1- j3.3

330

-100

330

10.7

100

MAX7030

Low-Cost, 315MHz, 345MHz, and 433.92MHz

ASK Transceiver with Fractional-N PLL

_______________________________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, 50Ω system impedance, PAVDD= AVDD= DVDD= HVIN= +2.1V to +3.6V, fRF= 315MHz, 345MHz, or

433.92MHz, T

A

= -40°C to +125°C, unless otherwise noted. Typical values are at PAVDD= AVDD= DVDD= HVIN= +2.7V, TA= +25°C,

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

= +125°C. 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

/ (VDDx IDD).

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 induc­tive degeneration connected from the LNA source to ground. The equivalent input circuit is 50Ω 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, PAVDD= AVDD= DVDD= HVIN= +3.0V, fRF= 433.92MHz, IF BW = 280kHz, 4kbps Manchester encoded,

0.2% BER, T

A

= +25°C, unless otherwise noted.)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX7030 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

3.33.02.72.4

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)

425400325 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 (µA)

1108535 60-10-15

2

4

6

8

10

12

14

16

18

0

-40

VCC = +3.6V

VCC = +3.0V

VCC = +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

MAX7030

Low-Cost, 315MHz, 345MHz, and 433.92MHz
ASK Transceiver with Fractional-N PLL

6 _______________________________________________________________________________________

BIT-ERROR RATE

vs. AVERAGE INPUT POWER

MAX7030 toc04

AVERAGE INPUT POWER (dBm)

BIT-ERROR RATE (%)

-113-115-117-119

0.1

1

10

100

0.01

-121 -111

fRF = 434MHz

fRF = 315MHz

0.2% BER

SENSITIVITY vs. TEMPERATURE

TEMPERATURE (°C)

SENSITIVITY (dBm)

11085603510-15

-117

-114

-111

-108

-105

-102

-120

-40

MAX7030 toc05

fRF = 434MHz

fRF = 315MHz

RSSI vs. RF INPUT POWER

MAX7030 toc06

RF INPUT POWER (dBm)

RSSI (V)

-10-30-70 -50-90-110

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

-130 10

LOW-GAIN MODE

HIGH-GAIN MODE

AGC SWITCH
POINT

AGC HYSTERESIS: 3dB

RSSI AND DELTA vs. IF INPUT POWER

MAX7030 toc07

IF INPUT POWER (dBm)

RSSI (V)

-10-30-50-70

0.3

0.6

0.9

1.2

1.5

1.8

2.1

0

-90 10

-2.5

-1.5

-0.5

0.5

1.5

2.5

3.5

-3.5

DELTA (%)

RSSI

DELTA

SYSTEM GAIN vs. IF FREQUENCY

MAX7030 toc08

IF FREQUENCY (MHz)

SYSTEM GAIN (dBm)

252015105

-10

0

10

20

30

40

50

-20
030

LOWER SIDEBAND

UPPER SIDEBAND

FROM RFIN

TO MIXOUT

f

RF

= 434MHz

48dB IMAGE

REJECTION

IMAGE REJECTION vs. TEMPERATURE

MAX7030 toc09

TEMPERATURE (°C)

IMAGE REJECTION (dB)

11085603510-15

44

46

48

42

-40

fRF = 433MHz

fRF = 315MHz

S11 SMITH PLOT OF R

FIN

MAX7030 toc12

433MHz

500MHz

400MHz

NORMALIZED IF GAIN vs. IF FREQUENCY

MAX7030 toc10

IF FREQUENCY (MHz)

NORMALIZED IF GAIN (dB)

10

-16

-12

-8

-4

0

-20
1 100

S11 vs. RF FREQUENCY

MAX7030 toc11

RF FREQUENCY (MHz)

S11 (dB)

450400350300250

-18

-12

-6

0

-24
200 500

433.92MHz

Typical Operating Characteristics (continued)

(Typical Operating Circuit, PAVDD= AVDD= DVDD= HVIN= +3.0V, fRF= 433.92MHz, IF BW = 280kHz, 4kbps Manchester encoded,

0.2% BER, TA= +25°C, unless otherwise noted.)

RECEIVER