Specifications

113Environmental Automation: Recommended Solutions
Interface
Part Description Features Benefits
RS-485 Transceivers
MAX13448E ±80V fault-protected full-duplex
RS-485 transceiver
Fail-safe against open or shorted
inputs, ±8kV ESD protection
Provides a robust interface
protected against various fault
conditions.
Wireless
Part Description Features Benefits
Transmitters
MAX7044 ASK transmitter in tiny package +13dBm transmit power, SOT23
package, 2.1V to 3.6V supply, data
rates to 100kbps, 7.7mA power
draw at 50% duty cycle, clock
output eliminates µC crystal
High-efficiency solution prolongs
battery life.
MAX7049 ASK/FSK transmitter operating in
288MHz to 945MHz range
+12dBm Tx power at high bands
while circuit drain is low 31.5mA
supply current, fractional-N
synthesizer gives frequency agility,
programmable output power
Provides flexible solution to
balance power vs. battery life;
eases transmit frequency selection.
MAX7057 ASK/FSK transmitter with
programmable transmit frequency
Internal antenna matching
components, 2.1V to 3.6V supply,
data rates to 100kbps
Enables multiple radio links by
changing frequency.
MAX1472 ASK transmitter operating in the
300MHz to 450MHz range
Data rates to 100kbps, 2.1V to
3.6V supply, low 5.3mA operating
supply current
Low-power, low-voltage operation
provides long battery life in
wireless applications.
Receivers
MAX7036 ASK receiver operating in the
300MHz to 450MHz range
Internal IF filter, high sensitivity to
-109dBm, 3.3V to 5V supply range
Reduces BOM due to internal IF
filter.
MAX7042 FSK receiver operating in the
308MHz to 433.92MHz range
High sensitivity to -110dBm
at 315MHz and -109dBm at
433.92MHz, fast < 250µs startup,
low 6.4mA receive current, 20nA
standby current
High FSK sensitivity eliminates
need for external LNA reducing
BOM and extending range.
MAX1471 ASK/FSK receiver operating at
315MHz/434MHz
High sensitivity to -114dBm ASK,
-108dBm FSK, integrated 45dB
image reject, SPI programmable,
polling feature to save power,
-40°C to +125°C
Support for simultaneous ASK and
FSK reception provides design
flexibility.
Transceivers
MAX7032 ASK/FSK transceiver with
fractional-N PLL transmitter
High sensitivity to -114dBm ASK,
-110dBm FSK, integrated > 45dB
image reject, SPI programmable,
low current draw, -40°C to +125°C
High ASK/FSK sensitivity extends
range.
Microcontrollers
Part Description Features Benefits
MAXQ610 16-bit microcontroller with
infrared module
Ultra-low power 0.2µA stop mode,
protection feature locks access to
firmware, 1.7V to 3.6V supply
Ultra-low power reduces battery
maintenance costs.
MAXQ1004 16-bit microcontroller with AES
encryption
High security against tamper, SPI
interface, 1-Wire slave interface,
300nA stop mode, 1.7V to 3.6V
supply
Provides high data security while
using very low power.