MAX7030 MAXIM [Maxim Integrated Products], MAX7030 Datasheet

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MAX7030

Manufacturer Part Number
MAX7030
Description
Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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
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 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 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 -40°C to +125°C temperature range.
† Consult factory for availability.
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.
2-Way Remote Keyless Entry
Security Systems
Home Automation
Remote Controls
Remote Sensing
Smoke Alarms
Garage Door Openers
Local Telemetry Systems
Low-Cost, 315MHz, 345MHz, and 433.92MHz
________________________________________________________________ Maxim Integrated Products
ASK Transceiver with Fractional-N PLL
General Description
Applications
, or
♦ +2.1V to +3.6V or +4.5V to +5.5V Single-Supply
♦ Single-Crystal Transceiver
♦ Factory-Preset Frequency (No Serial Interface
♦ ASK/OOK Modulation
♦ +10dBm Output Power into 50Ω Load
♦ Integrated TX/RX Switch
♦ Integrated Transmit and Receive PLL, VCO, and
♦ > 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
*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_ATJ -40°C to +125°C 32 Thin QFN-EP**
Operation
Required)
Loop Filter
PART
MAX7030MATJ
MAX7030HATJ
MAX7030LATJ
PART
TEMP RANGE PIN-PACKAGE
Product Selector Guide
Ordering Information
CARRIER FREQUENCY (MHz)
433.92
315
345
Features
T3255-3
CODE
PKG
1

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MAX7030 Summary of contents

Page 1

... 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 -40°C to +125°C temperature range. † Consult factory for availability. ...

Page 2

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL ABSOLUTE MAXIMUM RATINGS HV to GND..........................................................-0.3V to +6.0V IN PAV , GND ................................-0.3V to +4. ENABLE, T/R, DATA, AGC0, AGC1, AGC2 to GND ...

Page 3

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL DC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, 50Ω system impedance, AV 433.92MHz -40°C to +125°C, unless otherwise noted. Typical values are unless otherwise noted.) (Note ...

Page 4

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, 50Ω system impedance, PAV 433.92MHz -40°C to +125°C, unless otherwise noted. Typical values are at PAV A unless otherwise noted.) (Note ...

Page 5

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, 50Ω system impedance, PAV 433.92MHz -40°C to +125°C, unless otherwise noted. Typical values are at PAV A unless otherwise noted.) (Note ...

Page 6

... BER +25°C, unless otherwise noted.) A BIT-ERROR RATE vs. AVERAGE INPUT POWER 100 434MHz RF 1 0.2% BER 0 315MHz RF 0.01 -121 -119 -117 -115 -113 -111 AVERAGE INPUT POWER (dBm) RSSI AND DELTA vs. IF INPUT POWER MAX7030 toc07 3.5 2.1 2.5 1.8 1.5 1.5 RSSI 0.5 1.2 -0.5 0.9 -1.5 0.6 DELTA -2.5 0.3 -3.5 0 -90 -70 -50 -30 - INPUT POWER (dBm) NORMALIZED IF GAIN vs ...

Page 7

... RECEIVER MAX7030 toc13 -220 -230 -240 -250 -260 -270 -280 -290 100 f = 315MHz RF 1M 10M INPUT IMPEDANCE vs. INDUCTIVE DEGENERATION MAX7030 toc14 434MHz RF 80 IMAGINARY 70 IMPEDANCE REAL IMPEDANCE 100 INDUCTIVE DEGENERATION (nH) PHASE NOISE vs. OFFSET FREQUENCY - 433MHz ...

Page 8

... SUPPLY CURRENT vs. OUTPUT POWER 434MHz ENVELOPE SHAPING ENABLED 50% DUTY CYCLE -14 - AVERAGE OUTPUT POWER (dBm) vs. EXTERNAL RESISTOR MAX7030 toc23-2 16 POWER CURRENT -12 - 100 1k 10k EXTERNAL RESISTOR (Ω) = -40°C 3 ...

Page 9

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL (Typical Operating Circuit, PAV = AV DD 0.2% BER +25°C, unless otherwise noted.) A OUTPUT POWER vs. SUPPLY VOLTAGE 315MHz ENVELOPE SHAPING ...

Page 10

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL (Typical Operating Circuit, PAV = 0.2% BER +25°C, unless otherwise noted.) A PHASE NOISE vs. OFFSET FREQUENCY - 434MHz RF -50 -60 -70 ...

Page 11

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL PIN NAME Power-Amplifier Supply Voltage. Bypass to GND with 0.01µF and 220pF capacitors placed as close 1 PAV DD to the pin as possible. Envelope-Shaping Output. ROUT controls the power-amplifier ...

Page 12

... AGC dwell time (see Table 1). The AGC has a hysteresis of approximately 4dB. With the AGC function, the RSSI dynamic range is increased, allowing the MAX7030 to reliably produce an ASK out- put for RF input levels up to 0dBm with a modulation depth of 18dB. AGC is not required and can be dis- abled (see Table 1) ...

Page 13

... This says that AGC1 is set high and AGC0 and AGC2 are set low. A unique feature of the MAX7030 is the integrated image rejection of the mixer. This eliminates the need for a costly front-end SAW filter for many applications. ...

Page 14

... Figure 1. Sallen-Key Lowpass Data Filter ≈ 450 pF Table 2. Coefficients to Calculate CF1 ) and CF2 ≈ 225 pF ) FILTER TYPE to Butterworth 0.707) Bessel (Q = 0.577) Data Slicer Figure MAX7030 RSSI 100kΩ 100kΩ DS+ OP 1.414 1.000 1.3617 0.618 ...

Page 15

... PLL for its transmit frequency synthesizer. All PLL com- ponents, including the loop filter, are integrated inter- nally. The loop bandwidth is approximately 200kHz. The MAX7030 can be powered from a 2.1V to 3.6V sup- Transmitter ply or a 4.5V to 5.5V supply 4.5V to 5.5V supply is used, then the on-chip linear regulator reduces the 5V supply to the 3V needed to operate the chip ...

Page 16

... Drive T/R high to put the device in transmit mode; drive T/R low to put the device in receive mode. Crystal Oscillator (XTAL) The XTAL oscillator in the MAX7030 is designed to pre- sent a capacitance of approximately 3pF between the XTAL1 and XTAL2 pins. In most cases, this corre- sponds to a 4.5pF load capacitance applied to the external crystal when typical PC board parasitics are added ...

Page 17

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL Table 3. Component Values for Typical Application Circuit VALUE FOR COMPONENT 433.92MHz RF C1 220pF C2 680pF C3 6.8pF C4 6.8pF C5 10pF C6 220pF C7 0.1µF C8 100pF C9 ...

Page 18

... *OPTIONAL POWER-ADJUST RESISTOR 18 ______________________________________________________________________________________ C20 C21 PAV DD C22 2 ROUT 3 TX/RX1 4 MAX7030 TX/RX2 5 PAOUT V DD EXPOSED 6 PADDLE LNAIN 8 LNASRC C10 C12 C11 PROCESS: CMOS Typical Application Circuit AGC0 ...

Page 19

... VCO RX FREQUENCY DIVIDER TX PHASE FREQUENCY DETECTOR DIVIDER CHARGE PUMP TX VCO LOOP FILTER MAX7030 1 5 PAV PAOUT TX/RX1 DD Functional Diagram IFIN LIMITING AMPS RSSI 100kΩ 100kΩ DATA FILTER ∆Σ MODULATOR RX DATA DIGITAL LOGIC ...

Page 20

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) MARKING XXXXX PIN # 1 I.D. C ...

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