Ad5700 Modem Protocolo Hart Fsk 1200 Bps Lfcsp24 Itytarg

Data Format HART
Baud Rates -
Voltage - Supply 1.71V ~ 5.5V
Mounting Type Surface Mount
Package / Case 24-WFQFN Exposed Pad
Supplier Device Package 24-LFCSP-WQ (4x4)

FEATURES
HART-compliant fully integrated FSK modem
1200 Hz and 2200 Hz sinusoidal shift frequencies
115 µA maximum supply current in receive mode
Suitable for intrinsically safe applications
Integrated receive band-pass filter
Minimal external components required
Clocking optimized for various system configurations
Ultralow power crystal oscillator (60 µA maximum)
External CMOS clock source
Precision internal oscillator (AD5700-1only)
Buffered HART output—extra drive capability
8 kV HBM ESD rating
1.71 V to 5.5 V power supply
1.71 V to 5.5 V interface
−40°C to +125°C operation
4 mm × 4 mm LFCSP package
HART physical layer compliant
UART interface

GENERAL DESCRIPTION
The AD5700/AD5700-1 are single-chip solutions, designed
and specified to operate as a HART® FSKhalf-duplex modem,
complying with the HART physical layer requirements. The
AD5700/AD5700-1 integrateall of the necessary filtering, signal
detection, modulating, demodulating and signal generation
functions, thus requiring fewexternal components. The 0.5%
precision internal oscillator on the AD5700-1 greatly reduces
the board space requirements, making it ideal for line-powered
applications in both master and slave configurations. The maximum supply current consumption is 115µA, making theAD5700/
AD5700-1 an optimal choiceforlowpowerloop-powered applications. Transmit waveforms are phase continuous 1200 Hz and
2200 Hz sinusoids. The AD5700/AD5700-1 containaccurate
carrier detect circuitry and use a standard UART interface.