V
參數(shù)資料
型號(hào): AD5700BCPZ-RL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 19/24頁(yè)
文件大?。?/td> 0K
描述: IC HART MODEM LP 24LFCSP
標(biāo)準(zhǔn)包裝: 1,500
系列: *
AD5700/AD5700-1
Data Sheet
Rev. F | Page 4 of 24
Parameter1
Min
Typ
Max
Unit
Test Conditions/Comments
DIGITAL OUTPUTS
VOH, Output High Voltage
IOVCC 0.5
V
VOL, Output Low Voltage
0.4
V
CD Assert6
85
100
110
mV p-p
HART_IN INPUT5
Input Voltage Range
0
REF
V
External reference source
0
1.5
V
Internal reference enabled
HART_OUT OUTPUT
Output Voltage
459
493
505
mV p-p
AC-coupled (2.2 F), measured at HART_OUT
pin with 160 Ω load (worst-case load), see
voltage vs. load
Mark Frequency7
1200
Hz
Internal oscillator
Space Frequency7
2200
Hz
Internal oscillator
Frequency Error
0.5
+0.5
%
Internal oscillator, 40°C to +85°C
1
+1
%
Internal oscillator, 40°C to +125°C
Phase Continuity Error5
0
Degrees
Maximum Load Current5
160
Ω
Worst-case load is 160 Ω, ac-coupled with
2.2 F, see Figure 21 for recommended
configuration if driving a resistive load
Transmit Impedance
7
Ω
RTS low, at the HART_OUT pin
70
RTS high, at the HART_OUT pin
INTERNAL OSCILLATOR
Frequency
1.2226
1.2288
1.2349
MHz
40°C to +85°C
1.2165
1.2288
1.2411
MHz
40°C to +125°C
EXTERNAL CLOCK
External Clock Source Frequency
3.6496
3.6864
3.7232
MHz
1
Temperature range: 40°C to +125°C; typical at 25°C.
2
Current consumption specifications are based on mean current values.
3
The demodulator and modulator currents are specified using an external clock. If using an external crystal oscillator, the crystal oscillator current specification must be
added to the corresponding VCC and IOVCC demodulator/modulator current specification to obtain the total supply current required in this mode.
4
The demodulator and modulator currents are specified using an external clock. If using the internal oscillator, the internal oscillator current specification must be
added to the corresponding VCC and IOVCC demodulator/modulator current specification to obtain the total supply current required in this mode.
5
Guaranteed by design and characterization, but not production tested.
6
Specification set assuming a sinusoidal input signal containing preamble characters at the input and an ideal external filter (see Figure 23).
7
If the internal oscillator is not used, frequency accuracy is dependent on the accuracy of the crystal or clock source used.
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