DS8500 Datasheet, PDF (2/6 Pages) Maxim Integrated Products – HART Modem

HART Modem
ABSOLUTE MAXIMUM RATINGS
Voltage Range on All Pins (including AVDD,
DVDD) Relative to Ground .................................-0.5V to +3.6V
Voltage Range on Any Pin Relative to
Ground Except AVDD, DVDD .............-0.5V to (V_DVDD + 0.5V)
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature...........................Refer to the IPC/JEDEC
J-STD-020 Specification.
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.
RECOMMENDED DC OPERATING CONDITIONS
(V_DVDD = V_AVDD = 2.7V to 3.6V, T_A = -40°C to +85°C.) (Note 1)
PARAMETER
Digital Supply Voltage
Analog Supply Voltage
Ground
Digital Power-Fail Reset Voltage
Active Current
SYMBOL
V_DVDD
V_AVDD
GND
V_RST
I_DD
CONDITIONS
V_AVDD = V_DVDD
AGND = DGND
Monitors V_DVDD
V_AVDD = V_DVDD = 2.7V (Note 2)
Input Low Voltage
V_IL
Input High Voltage
Output Low Voltage
Output High Voltage
I/O Pin Capacitance
RST Pullup Resistance
Input Leakage Current XTAL,
RST
V_IL
V_OL
V_OH
C_IO
R_RST
I_ILRX
I_OL = 4mA
I_OH = -4mA
Guaranteed by design (Note 3)
MIN
2.7
2.7
0
2.59
DGND
0.75 x
V_DVDD
DGND
0.8 x
V_DVDD
19
-30
TYP
2.64
MAX
3.6
3.6
0
2.69
285
0.30 x
V_DVDD
UNITS
V
V
V
V
μA
V
V_DVDD
V
0.4
V
V
15
pF
45
k

+30
μA
Input Leakage Current All Other
Pins
I_IL
-2
Input Low Current for RST
I_IL1
V_IN = 0.4V
CLOCK SOURCE
External Clock Frequency
VOLTAGE REFERENCE
f_HFIN
-1% 3.6864
Internal Reference Voltage
V_REF
1.23
FSK INPUT
Input Voltage Range at FSK_IN
0
FSK OUTPUT
Output Voltage at FSK_OUT
Frequency of FSK_OUT (Note 4)
V_OUT
AC-coupled max 30k
load
For a mark
For a space
400 500
-1% 1200
-1% 2200
Note 1: Specifications to -40°C are guaranteed by design and are not production tested.
Note 2: Active currents are measured when the device is driven by an external clock XCEN = 1 condition.
Note 3: Guaranteed by design and not production tested.
Note 4: Accuracy is guaranteed based on the external crystal or clock provided.
+2
170
+1%
V_REF
600
+1%
+1%
μA
μA
MHz
V
V
mV_P-P
kHz
2 _______________________________________________________________________________________