For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
HART Modem
DS8500
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
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I/O Pin Capacitance
RST
Pullup Resistance
Input Leakage Current XTAL,
RST
Input Leakage Current All Other
Pins
Input Low Current for
RST
CLOCK SOURCE
External Clock Frequency
VOLTAGE REFERENCE
Internal Reference Voltage
FSK INPUT
Input Voltage Range at FSK_IN
FSK OUTPUT
Output Voltage at FSK_OUT
Frequency of FSK_OUT (Note 4)
V
OUT
AC-coupled max 30k
For a mark
For a space
load
400
-1%
-1%
500
1200
2200
600
+1%
+1%
mV
P-P
Hz
0
V
REF
V
V
REF
1.23
V
f
HFIN
-1%
3.6864
+1%
MHz
SYMBOL
V
DVDD
V
AVDD
GND
V
RST
I
DD
V
IL
V
IL
V
OL
V
OH
C
IO
R
RST
I
ILRX
I
IL
I
IL1
V
IN
= 0.4V
I
OL
= 4mA
I
OH
= -4mA
Guaranteed by design (Note 3)
19
-30
-2
V
AVDD
= V
DVDD
AGND = DGND
Monitors V
DVDD
V
AVDD
= V
DVDD
= 2.7V (Note 2)
DGND
0.75 x
V
DVDD
DGND
0.8 x
V
DVDD
15
45
+30
+2
170
CONDITIONS
MIN
2.7
2.7
0
2.59
2.64
TYP
MAX
3.6
3.6
0
2.69
285
0.30 x
V
DVDD
V
DVDD
0.4
UNITS
V
V
V
V
μA
V
V
V
V
pF
k
μA
μA
μA
Note 1:
Note 2:
Note 3:
Note 4:
2
Specifications to -40°C are guaranteed by design and are not production tested.
Active currents are measured when the device is driven by an external clock XCEN = 1 condition.
Guaranteed by design and not production tested.
Accuracy is guaranteed based on the external crystal or clock provided.
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