DS8500_09 Datasheet, PDF (6/7 Pages) Maxim Integrated Products – HART Modem

HART Modem
3.6864MHz
3.6864MHz
CRYSTAL
XCEN
OCD
D_OUT
XTAL1
XTAL2
CRYSTAL
OSCILLATOR
Rx
DEMODULATOR
RST
DVDD DGND
CLOCK
GENERATOR
POWER
MONITOR
DIGITAL
FILTER
RTS
D_IN
MICROCONTROLLER
Tx
MODULATOR
DS8500
Figure 4. Typical Application Circuit
AGND
AVDD
POWER SUPPLY
2.7V TO 3.6V
V_REF
1.23V
SAMPLE/HOLD
ADC
REF
FSK_IN
R1
C2
R2
C1
R3
C3
HART IN
C4
DAC
FSK_OUT
HART AND
4–20mA
OUT
4–20mA
DAC OUTPUT
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE TYPE
20 TQFN
PACKAGE CODE
T2055+3
DOCUMENT NO.
21-0140
6 _______________________________________________________________________________________